4-CHANNEL www.ti.com I2C PCA9544A AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 FEATURES * * * * * * * * * 1-of-4 Bidirectional Translating Switches I2C Bus and SMBus Compatible Four Active-Low Interrupt Inputs Active-Low Interrupt Output Three Address Pins, Allowing up to Eight Devices on the I2C Bus Channel Selection Via I2C Bus Power Up With All Switch Channels Deselected Low RON Switches Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses * * * * * * * * No Glitch on Power Up Supports Hot Insertion Low Standby Current Operating Power-Supply Voltage Range of 2.3 V to 5.5 V 5.5-V Tolerant Inputs 0 to 400-kHz Clock Frequency Latch-Up Performance Exceeds 100 mA Per JESD 78 ESD Protection Exceeds JESD 22 - 2000-V Human-Body Model (A114-A) - 200-V Machine Model (A115-A) - 1000-V Charged-Device Model (C101) DESCRIPTION/ORDERING INFORMATION The PCA9544A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is determined by the contents of the programmable control register. Four interrupt inputs (INT3-INT0), one for each of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the four interrupt inputs. A power-on reset function puts the registers in their default state and initializes the I2C state machine, with no channel selected. The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage, which will be passed by the PCA9544A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant. ORDERING INFORMATION PACKAGE (1) TA PCA9544ARGWR PREVIEW QFN - RGY Reel of 1000 PCA9544ARGYR PD544A Tube of 25 PCA9544ADW Reel of 2000 PCA9544ADWR Reel of 250 PCA9544ADWT Tube of 70 PCA9544APW Reel of 2000 PCA9544APWR Reel of 250 PCA9544APWT Reel of 2000 PCA9544ADGVR PD544A TSSOP - PW TVSOP - DGV (1) TOP-SIDE MARKING Reel of 3000 SOIC - DW -40C to 85C ORDERABLE PART NUMBER QFN - RGW PCA9544A PREVIEW PD544A Reel of 250 PCA9544ADGVT PREVIEW VFBGA - GQN Reel of 1000 PCA9544AGQNR PD544A VFBGA - ZQN (Pb-free) Reel of 1000 PCA9544AZQNR PD544A Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright (c) 2005, Texas Instruments Incorporated PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 20 2 19 VCC SDA SCL INT SC3 SD3 INT3 SC2 SD2 INT2 18 3 17 4 16 5 6 15 7 14 8 13 9 12 10 11 A1 A2 INT0 SD0 SC0 INT1 SD1 SC1 A0 VCC 1 20 19 SDA 18 SCL 17 INT 2 3 4 6 16 SC3 15 SD3 7 8 14 INT3 13 SC2 5 20 19 18 17 16 A2 INT0 SD0 SC0 INT1 1 15 INT 2 3 14 SC3 13 SD3 4 12 INT3 5 10 11 GND INT2 11 6 12 SD2 9 VCC SDA SCL 1 RGW PACKAGE (TOP VIEW) A1 A0 A0 A1 A2 INT0 SD0 SC0 INT1 SD1 SC1 GND RGY PACKAGE (TOP VIEW) 7 SC2 8 9 10 SD1 SC1 GND INT2 SD2 DGV, DW, OR PW PACKAGE (TOP VIEW) PIN DESCRIPTION PIN NO. NAME FUNCTION DGV, DW, PW, AND RGY RGW 1 19 A0 Address input 0 2 20 A1 Address input 1 3 1 A2 Address input 2 4 2 INT0 Active-low interrupt input 0 5 3 SD0 Serial data 0 6 4 SC0 Serial clock 0 7 5 INT1 Active-low interrupt input 1 8 6 SD1 Serial data 1 9 7 SC1 Serial clock 1 10 8 GND Ground 11 9 INT2 Active-low interrupt input 2 12 10 SD2 Serial data 2 13 11 SC2 Serial clock 2 14 12 INT3 Active-low interrupt input 3 15 13 SD3 Serial data 3 16 14 SC3 Serial clock 3 17 15 INT Active-low interrupt output 18 16 SCL Serial clock line 19 17 SDA Serial data line 20 18 VCC Supply power GQN OR ZQN PACKAGE (TOP VIEW) 1 2 3 4 A A1 A0 VCC SDA A B INT0 INT A2 SCL B C SC0 SD0 SD3 SC3 C D SD1 SC2 INT1 INT3 D E GND SC1 INT2 SD2 1 E 2 TERMINAL ASSIGNMENTS 2 3 4 4-CHANNEL www.ti.com I2C PCA9544A AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 BLOCK DIAGRAM PCA9544A SC0 SC1 SC2 SC3 SD0 SD1 6 9 13 16 5 8 12 SD2 SD3 GND VCC SCL SDA INT0 INT1 INT2 INT3 15 Switch Control Logic 10 20 Power-on Reset 18 19 1 Input Filter 4 7 11 14 I2C 2 Bus Control Interrupt Logic 3 Output Filter 17 A0 A1 A2 INT Pin numbers shown are for DGV, DW, PW, and RGY packages. 3 PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 Device Address Following a start condition, the bus master must output the address of the slave it is accessing. The address of the PCA9544A is shown in Figure 1. To conserve power, no internal pullup resistors are incorporated on the hardware-selectable address pins, and they must be pulled high or low. Slave Address 1 1 0 1 A2 A1 A0 R/W Hardware Selectable Fixed Figure 1. PCA9544A Address The last bit of the slave address defines the operation to be performed. When set to a logic 1, a read is selected, while a logic 0 selects a write operation. Control Register Following the successful acknowledgment of the slave address, the bus master sends a byte to the PCA9544A, which is stored in the control register. If multiple bytes are received by the PCA9544A, it saves the last byte received. This register can be written and read via the I2C bus. Channel-Selection Bits (Read/Write) Interrupt Bits (Read Only) 7 6 5 4 INT3 INT2 INT1 INT0 3 2 1 0 X B2 B1 B0 Enable Bit INT0 INT1 INT2 INT3 Figure 2. Control Register Control Register Definition One or several SCn/SDn downstream pairs, or channels, are selected by the contents of the control register (see Table 1). This register is written after the PCA9544A has been addressed. The three LSBs of the control byte are used to determine which channel (or channels) is to be selected. When a channel is selected, the channel becomes active after a stop condition has been placed on the I2C bus. This ensures that all SCn/SDn lines are in a high state when the channel is made active, so that no false conditions are generated at the time of connection. A stop condition always must occur right after the acknowledge cycle. 4 4-CHANNEL I2C www.ti.com PCA9544A AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 Table 1. Control Register Write (Channel Selection), Control Register Read (Channel Status) (1) (1) INT3 INT2 INT1 INT0 D3 B2 B1 B0 COMMAND X X X X X 0 X X No channel selected X X X X X 1 0 0 Channel 0 enabled X X X X X 1 0 1 Channel 1 enabled X X X X X 1 1 0 Channel 2 enabled X X X X X 1 1 1 Channel 3 enabled 0 0 0 0 0 0 0 0 No channel selected, power-up default state Only one channel may be selected at a time. Interrupt Handling The PCA9544A provides four interrupt inputs (one for each channel) and one open-drain interrupt output. When an interrupt is generated by any device, it is detected by the PCA9544A, and the interrupt output is driven low. The channel does not need to be active for detection of the interrupt. A bit also is set in the control register (see Table 2). Bits 4-7 of the control register correspond to channels 0-3 of the PCA9544A, respectively. Therefore, if an interrupt is generated by any device connected to channel 1, the state of the interrupt inputs is loaded into the control register when a read is accomplished. Likewise, an interrupt on any device connected to channel 0 causes bit 4 of the control register to be set on the read. The master then can address the PCA9544A and read the contents of the control register to determine which channel contains the device generating the interrupt. The master can reconfigure the PCA9544A to select this channel and locate the device generating the interrupt and clear it. Once the device responsible for the interrupt clears, the interrupt clears. It should be noted that more than one device can provide an interrupt on a channel, so it is up to the master to ensure that all devices on a channel are interrogated for an interrupt. The interrupt inputs can be used as general-purpose inputs if the interrupt function is not required. If unused, interrupt input(s) must be connected to VCC. Table 2. Control Register Read (Interrupt) (1) INT3 INT2 INT1 X X X X X 0 1 (1) X 0 1 X D3 B2 B1 B0 X X X X X X X X X X X X X X X X X X X X X 0 1 INT0 0 1 COMMAND No interrupt on channel 0 Interrupt on channel 0 No interrupt on channel 1 Interrupt on channel 1 No interrupt on channel 2 Interrupt on channel 2 No interrupt on channel 3 Interrupt on channel 3 Several interrupts can be active at the same time. For example, INT3 = 0, INT2 = 1, INT1 = 1, INT0 = 0 means that there is no interrupt on channels 0 and 3, and there is interrupt on channels 1 and 2. 5 PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 Power-On Reset When power is applied to VCC, an internal power-on reset holds the PCA9544A in a reset condition until VCC has reached VPOR. At this point, the reset condition is released, and the PCA9544A registers and I2C state machine are initialized to their default states, all zeroes, causing all the channels to be deselected. Thereafter, VCC must be lowered below 0.2 V to reset the device. Voltage Translation The pass-gate transistors of the PCA9544A are constructed such that the VCC voltage can be used to limit the maximum voltage that is passed from one I2C bus to another. Figure 3 shows the voltage characteristics of the pass-gate transistors (note that the graph was generated using data specified in the electrical characteristics section of this data sheet). In order for the PCA9544A to act as a voltage translator, the Vpass voltage must be equal to or lower than the lowest bus voltage. For example, if the main bus is running at 5 V and the downstream buses are 3.3 V and 2.7 V, Vpass must be equal to or below 2.7 V to effectively clamp the downstream bus voltages. As shown in Figure 3, Vpass (max) is at 2.7 V when the PCA9544A supply voltage is 3.5 V or lower, so the PCA9544A supply voltage could be set to 3.3 V. Pullup resistors then can be used to bring the bus voltages to their appropriate levels (see Figure 12). 5 4.5 Maximum Vpass (V) 4 Typical 3.5 3 2.5 2 Minimum 1.5 1 2 2.5 3 3.5 4 4.5 5 5.5 VCC (V) Figure 3. Vpass Voltage vs VCC I2C Interface The I2C bus is for two-way two-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pullup resistor when connected to the output stages of a device. Data transfer can be initiated only when the bus is not busy. One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the high period of the clock pulse, as changes in the data line at this time are interpreted as control signals (see Figure 4). 6 4-CHANNEL www.ti.com I2C PCA9544A AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 SDA SCL Data Line Stable; Data Valid Change of Data Allowed Figure 4. Bit Transfer Both data and clock lines remain high when the bus is not busy. A high-to-low transition of the data line while the clock is high is defined as the start condition (S). A low-to-high transition of the data line while the clock is high is defined as the stop condition (P) (see Figure 5). SDA SCL S P Start Condition Stop Condition Figure 5. Definition of Start and Stop Conditions A device generating a message is a transmitter; a device receiving a message is the receiver. The device that controls the message is the master, and the devices that are controlled by the master are the slaves (see Figure 6). SDA SCL Master Transmitter/ Receiver Slave Receiver Slave Transmitter/ Receiver Master Transmitter Master Transmitter/ Receiver I2C Multiplexer Slave Figure 6. System Configuration The number of data bytes transferred between the start and the stop conditions from transmitter to receiver is not limited. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before the receiver can send an ACK bit. 7 PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 When a slave receiver is addressed, it must generate an acknowledge (ACK) after the reception of each byte. Also, a master must generate an ACK after the reception of each byte that has been clocked out of the slave transmitter. The device that acknowledges must pull down the SDA line during the ACK clock pulse so that the SDA line is stable low during the high pulse of the ACK-related clock period (see Figure 7). Setup and hold times must be taken into account. Data Output by Transmitter NACK Data Output by Receiver ACK SCL From Master 1 2 8 9 S Start Condition Clock Pulse for ACK Figure 7. Acknowledgment on the I2C Bus A master receiver must signal an end of data to the transmitter by not generating an acknowledge (NACK) after the last byte has been clocked out of the slave. This is done by the master receiver by holding the SDA line high. In this event, the transmitter must release the data line to enable the master to generate a stop condition. Data is transmitted to the PCA9544A control register using the write mode shown in Figure 8. Slave Address SDA S 1 1 1 0 Control Register A2 A1 A0 Start Condition 0 A X X X X X B2 B1 B0 R/W ACK From Slave A ACK From Slave P Stop Condition Figure 8. Write Control Register Data is read from the PCA9544A control register using the read mode shown in Figure 9. Slave Address SDA S 1 Start Condition 1 1 0 A2 A1 Control Register A0 1 R/W A INT3 INT2 INT1 INT0 ACK From Slave B2 0 B0 NA NACK From Master Figure 9. Read Control Register 8 B1 P Stop Condition 4-CHANNEL www.ti.com I2C PCA9544A AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) MIN MAX VCC Supply voltage range -0.5 7 V VI Input voltage range (2) -0.5 7 V II Input current 20 mA IO Output current 25 mA 100 mA 100 mA Continuous current through VCC Continuous current through GND JA DGV package (3) 92 DW package (3) 58 GQN Package thermal impedance package (3) 78 PW package (3) 83 RGW package (4) TBD RGY package (4) 37 UNIT C/W Ptot Total power dissipation 400 mW Tstg Storage temperature range -65 150 C TA Operating free-air temperature range -40 85 C (1) (2) (3) (4) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed. The package thermal impedance is calculated in accordance with JESD 51-7. The package thermal impedance is calculated in accordance with JESD 51-5. Recommended Operating Conditions (1) VCC Supply voltage VIH High-level input voltage VIL Low-level input voltage TA Operating free-air temperature (1) MIN MAX 2.3 5.5 SCL, SDA 0.7 x VCC 6 A2-A0, INT3-INT0 0.7 x VCC VCC + 0.5 SCL, SDA -0.5 0.3 x VCC A2-A0, INT3-INT0 -0.5 0.3 x VCC -40 85 UNIT V V V C All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. 9 PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 Electrical Characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VPOR Power-on reset voltage (2) TEST CONDITIONS No load, VI = VCC or GND VCC MIN TYP (1) MAX VPOR 1.7 2.1 5V 3.6 4.5 V to 5.5 V Vpass Switch output voltage VSWin = VCC, ISWout = -100 A 2.6 3.3 V 3 V to 3.6 V IOH INT VO = VCC 1.6 VOL = 0.6 V INT 2.8 2.3 V to 5.5 V VOL = 0.4 V 2 10 3 7 6 10 3 7 SC3-SC0, SD3-SD0 A2-A0 VI = VCC or GND ICC 1 fSCL = 100 kHz VI = VCC or GND, VI = GND, IO = 0 IO = 0 Standby mode High inputs INT3-INT0 Supply-current change SCL, SDA A2-A0 Ci INT3-INT0 Cio(OFF) (3) RON (1) (2) (3) 10 A 1 Low inputs ICC mA 1 2.3 V to 5.5 V INT3-INT0 Operating mode A 1 SCL, SDA II V 1.5 1.1 2.3 V to 5.5 V VOL = 0.4 V SCL, SDA IOL V 4.5 1.9 2.5 V 2.3 V to 2.7 V UNIT SCL, SDA SC3-SC0, SD3-SD0 Switch-on resistance VI = VCC, IO = 0 5.5 V 3 12 3.6 V 3 11 2.7 V 3 10 5.5 V 0.3 1 3.6 V 0.1 1 2.7 V 0.1 1 5.5 V 0.3 1 3.6 V 0.1 1 2.7 V 0.1 1 8 15 8 15 8 15 8 15 4.5 6 4.5 6 15 19 6 8 One INT3-INT0 input at 0.6 V, Other inputs at VCC or GND One INT3-INT0 input at VCC - 0.6 V, Other inputs at VCC or GND SCL or SDA input at 0.6 V, Other inputs at VCC or GND A 2.3 V to 5.5 V SCL or SDA inputs at VCC - 0.6 V, Other inputs at VCC or GND VI = VCC or GND 2.3 V to 5.5 V VI = VCC or GND, Switch OFF VO = 0.4 V, IO = 15 mA VO = 0.4 V, IO = 10 mA A 2.3 V to 5.5 V 4.5 V to 5.5 V 4 9 16 3 V to 3.6 V 5 11 20 2.3 V to 2.7 V 7 16 45 All typical values are at nominal supply voltage (2.5-V, 3.3-V, or 5-V VCC), TA = 25C. The power-on reset circuit resets the I2C bus logic with VCC < VPOR. VCC must be lowered to 0.2 V to reset the device. Cio(ON) depends on internal capacitance and external capacitance added to the SCn lines when channels(s) are ON. pF pF 4-CHANNEL PCA9544A AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC I2C www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 I2C Interface Timing Requirements over recommended operating free-air temperature range (unless otherwise noted) (see Figure 12) STANDARD-MODE I2C BUS MIN MAX 100 FAST-MODE I2C BUS UNIT MIN MAX 0 400 fscl I2C clock frequency 0 tsch I2C clock high time 4 0.6 s tscl I2C clock low time 4.7 1.3 s tsp I2C tsds I2C serial-data setup time 250 100 ns tsdh I2C serial-data hold time 0 (1) 0 (1) s ticr I2C input rise time ticf I2C tocf I2C output fall time (10-pF to 400-pF bus) tbuf I2C bus free time between stop and start 4.7 1.3 s tsts I2C start or repeated start condition setup 4.7 0.6 s tsth I2C start or repeated start condition hold 4 0.6 s tsps I2C stop condition setup 4 0.6 s spike time 50 input fall time low) (3) tvdL(Data) Valid-data time (high to tvdH(Data) Valid-data time (low to high) (3) SCL low to SDA output high valid tvd(ack) Valid-data time of ACK condition ACK signal from SCL low to SDA output low Cb I2C bus capacitive load (1) (2) (3) 50 kHz ns 1000 20 + 0.1Cb (2) 300 ns 300 20 + 0.1Cb (2) 300 ns 300 20 + 0.1Cb (2) 300 ns 1 1 s 0.6 0.6 s 1 1 s 400 400 pF SCL low to SDA output low valid A device internally must provide a hold time of at least 300 ns for the SDA signal (referred to as the VIH min of the SCL signal), in order to bridge the undefined region of the falling edge of SCL. Cb = total bus capacitance of one bus line in pF Data taken using a 1-k pullup resistor and 50-pF load (see Figure 10). Switching Characteristics over recommended operating free-air temperature range, CL 100 pF (unless otherwise noted) (see Figure 10) PARAMETER RON = 20 , CL = 15 pF FROM (INPUT) TO (OUTPUT) SDA or SCL SDn or SCn MIN MAX 0.3 UNIT s tpd (1) Propagation delay time tiv Interrupt valid time (2) INTn INT 4 s tir Interrupt reset delay time (2) INTn INT 2 s (1) (2) RON = 20 , CL = 50 pF 1 The propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load capacitance, when driven by an ideal voltage source (zero output impedance). Data taken using a 4.7-k pullup resistor and 100-pF load (see Figure 11). Interrupt Timing Requirements over recommended operating free-air temperature range (unless otherwise noted) PARAMETER MIN MAX UNIT tPWRL Low-level pulse duration rejection of INTn inputs (1) 1 s tPWRH High-level pulse duration rejection of INTn inputs (1) 0.5 s (1) Data taken using a 4.7-k pullup resistor and 100-pF load (see Figure 11). 11 PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 PARAMETER MEASUREMENT INFORMATION VCC RL = 1 k SDn, SCn DUT CL = 50 pF (See Note A) I2C-PORT LOAD CONFIGURATION Two Bytes for Complete Device Programming Start Address Stop Address Bit 7 Condition Condition Bit 6 (S) (P) (MSB) BYTE DESCRIPTION 1 I2C address + R/W 2 Control register data Address Bit 1 tscl R/W Bit 0 (LSB) ACK (A) Data Bit 7 (MSB) Data Bit 0 (LSB) ACK (A) Stop Condition (P) tsch 0.7 x VCC SCL ticr ticf tbuf tsp tvd(ACK) or tvdL tvdH 0.3 x VCC tsts 0.7 x VCC SDA 0.3 x VCC ticf ticr tsth tsdh tsds tsps Repeat Start Condition Start or Repeat Start Condition Stop Condition VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR 10 MHz, ZO = 50 , tr/tf 30 ns. C. The outputs are measured one at a time, with one transition per measurement. Figure 10. I2C Interface Load Circuit, Byte Descriptions, and Voltage Waveforms 12 4-CHANNEL www.ti.com I2C PCA9544A AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 PARAMETER MEASUREMENT INFORMATION (continued) VCC RL = 4.7 k DUT INT CL = 100 pF (See Note A) INTERRUPT LOAD CONFIGURATION INTn (input) 0.5 x VCC INTn (input) tir tiv INT (output) 0.5 x VCC VOLTAGE WAVEFORMS (tiv) 0.5 x VCC INT (output) 0.5 x VCC VOLTAGE WAVEFORMS (tir) NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR 10 MHz, ZO = 50 , tr/tf 30 ns. Figure 11. Interrupt Load Circuit and Voltage Waveforms 13 PCA9544A 4-CHANNEL I2C AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC www.ti.com SCPS146A - OCTOBER 2005 - REVISED OCTOBER 2005 APPLICATION INFORMATION VCC = 2.7 V to 5.5 V VCC = 3.3 V VCC = 2.7 V to 5.5 V 20 SDA I2C/SMBus SCL Master 19 18 17 SDA SCL INT See Note A SD0 5 SC0 6 4 INT0 Channel 0 VCC = 2.7 V to 5.5 V See Note A SD1 SC1 INT1 8 9 7 Channel 1 VCC = 2.7 V to 5.5 V PCA9544A See Note A SD2 SC2 INT2 3 A2 2 A1 1 A0 10 GND 12 13 Channel 2 11 VCC = 2.7 V to 5.5 V See Note A SD3 SC3 INT3 15 16 Channel 3 14 NOTES: A. If the device generating the interrupt has an open-drain output structure or can be 3-stated, a pullup resistor is required. If the device generating the interrupt has a totem-pole output structure and cannot be 3-stated, a pullup resistor is not required. The interrupt inputs should not be left floating. B. Pin numbers shown are for DGV, DW, PW, and RGY packages. Figure 12. Typical Application 14 PACKAGE OPTION ADDENDUM www.ti.com 7-Oct-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty PCA9544ADGVR PREVIEW TVSOP DGV 20 2000 TBD Call TI Call TI PCA9544ADGVT PREVIEW TVSOP DGV 20 250 TBD Call TI Call TI Lead/Ball Finish MSL Peak Temp (3) PCA9544ADW PREVIEW SOIC DW 20 25 TBD Call TI Call TI PCA9544ADWR PREVIEW SOIC DW 20 2000 TBD Call TI Call TI PCA9544ADWT PREVIEW SOIC DW 20 250 TBD Call TI Call TI PCA9544AGQNR PREVIEW VFBGA GQN 20 1000 TBD Call TI Call TI PCA9544APW PREVIEW TSSOP PW 20 70 TBD Call TI Call TI PCA9544APWR PREVIEW TSSOP PW 20 2000 TBD Call TI Call TI PCA9544APWT PREVIEW TSSOP PW 20 250 TBD Call TI Call TI PCA9544ARGWR PREVIEW QFN RGW 20 3000 TBD Call TI Call TI PCA9544ARGYR PREVIEW QFN RGY 20 1000 TBD Call TI Call TI PCA9544AZQNR PREVIEW VFBGA ZQN 20 1000 TBD Call TI Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 1 MECHANICAL DATA MPDS006C - FEBRUARY 1996 - REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,40 0,23 0,13 24 13 0,07 M 0,16 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 0-8 1 0,75 0,50 12 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,08 14 16 20 24 38 48 56 A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 DIM 4073251/E 08/00 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side. Falls within JEDEC: 24/48 Pins - MO-153 14/16/20/56 Pins - MO-194 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 MECHANICAL DATA MTSS001C - JANUARY 1995 - REVISED FEBRUARY 1999 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,30 0,19 0,65 14 0,10 M 8 0,15 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 1 7 0- 8 A 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 8 14 16 20 24 28 A MAX 3,10 5,10 5,10 6,60 7,90 9,80 A MIN 2,90 4,90 4,90 6,40 7,70 9,60 DIM 4040064/F 01/97 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. 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