INTEGRATED CIRCUITS PCA9544A 4-channel I2C multiplexer with interrupt logic Product data sheet Supersedes data of 2004 Jul 28 2004 Sep 29 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A DESCRIPTION The PCA9544A is a 1-of-4 bi-directional translating multiplexer, controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register. Four interrupt inputs, INT0 to INT3, one for each of the SCx/SDx downstream pairs, are provided. One interrupt output, INT, which acts as an AND of the four interrupt inputs, is provided. A power-on reset function puts the registers in their default state and initializes the I2C state machine with no channels selected. FEATURES * 1-of-4 bi-directional translating multiplexer * I2C interface logic; compatible with SMBus * 4 Active-LOW Interrupt Inputs * Active-LOW Interrupt Output * 3 address pins allowing up to 8 devices on the I2C-bus * Channel selection via I2C-bus * Power-up with all multiplexer channels deselected * Low RdsON switches * Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and The pass gates of the multiplexer are constructed such that the VDD 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 SCx/SDx 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 pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5 V tolerant. 5 V buses * No glitch on power-up * Supports hot insertion * Low stand-by current * Operating power supply voltage range of 2.3 V to 5.5 V * 5 V tolerant Inputs * 0 to 400 kHz clock frequency * ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V per JESD22-C101 * Latchup testing is done to JESDEC Standard JESD78 which exceeds 100 mA * Three packages offered: SO20, TSSOP20, and HVQFN20 ORDERING INFORMATION PACKAGES TEMPERATURE RANGE ORDER CODE TOPSIDE MARK DRAWING NUMBER 20-Pin Plastic SO -40 C to +85 C PCA9544AD PCA9544AD SOT163-1 20-Pin Plastic TSSOP -40 C to +85 C PCA9544APW PA9544A SOT360-1 20-Pin Plastic HVQFN -40 C to +85 C PCA9544ABS 9544A SOT662-1 Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging. I2C is a trademark of Philips Semiconductors Corporation. 2004 Sep 29 2 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic 18 SCL INT0 4 17 INT 16 19 SDA A2 3 A0 VDD SDA SCL 17 A1 2 A1 18 20 VDD 19 A0 1 PIN CONFIGURATION -- HVQFN 20 PIN CONFIGURATION -- SO, TSSOP PCA9544A A2 1 15 INT INT0 2 14 SC3 3 13 SD3 SD0 5 16 SC3 SD0 INT1 5 11 SC2 SD1 8 13 SC2 SC1 9 12 SD2 VSS 10 11 INT2 10 12 INT3 9 4 8 SC0 14 INT3 7 15 SD3 6 SC0 6 INT1 7 SD1 SC1 VSS INT2 SD2 TOP VIEW SW00373 Figure 1. Pin configuration -- SO, TSSOP Figure 2. Pin configuration -- HVQFN PIN DESCRIPTION SO, TSSOP PIN NUMBER HVQFN PIN NUMBER SYMBOL 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 VSS Supply ground 11 9 INT2 Active-LOW interrupt input 2 12 10 SD2 Serial data 2 FUNCTION 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 VDD Supply voltage 2004 Sep 29 su01666 3 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A BLOCK DIAGRAM PCA9544A SC0 SC1 SC2 SC3 SD0 SD1 SD2 SD3 SWITCH CONTROL LOGIC VSS VDD POWER-ON RESET SCL SDA A0 INPUT FILTER I2C-BUS CONTROL A1 A2 INT[0-3] INT LOGIC INT SW02267 Figure 3. Block diagram 2004 Sep 29 4 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A DEVICE ADDRESSING INTERRUPT HANDLING 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 4. To conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW. The PCA9544A provides 4 interrupt inputs, one for each channel and one open drain interrupt output. When an interrupt is generated by any device, it will be detected by the PCA9544A and the interrupt output will be driven LOW. The channel need not be active for detection of the interrupt. A bit is also set in the control byte. Bits 4 - 7 of the control byte correspond to channels 0 - 3 of the PCA9544A, respectively. Therefore, if an interrupt is generated by any device connected to channel 2, 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 would cause bit 4 of the control register to be set on the read. The master can then address the PCA9544A and read the contents of the control byte to determine which channel contains the device generating the interrupt. The master can then reconfigure the PCA9544A to select this channel, and locate the device generating the interrupt and clear it. The interrupt clears when the device originating the interrupt clears. 1 1 0 1 A2 FIXED A1 A0 R/W HARDWARE SELECTABLE SW00862 Figure 4. Slave address The last bit of the slave address defines the operation to be performed. When set to logic 1, a read is selected while a logic 0 selects a write operation. It should be noted that more than one device can be providing 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. CONTROL REGISTER Following the successful acknowledgement of the slave address, the bus master will send a byte to the PCA9544A which will be stored in the Control Register. If multiple bytes are received by the PCA9544A, it will save the last byte received. This register can be written and read via the I2C-bus. INTERRUPT BITS (READ ONLY) 7 6 5 4 INT3 INT2 INT1 INT0 The interrupt inputs may be used as general purpose inputs if the interrupt function is not required. If unused, interrupt input(s) must be connected to VDD through a pull-up resistor. CHANNEL SELECTION BITS (READ/WRITE) 3 2 1 0 X B2 B1 B0 Table 2. Control Register Read -- Interrupt INT3 INT2 INT1 X X X INT0 D3 B2 B1 B0 X X X X 0 ENABLE BIT SW00386 1 Figure 5. Control register 0 CONTROL REGISTER DEFINITION X X X X X X X X X X X X 1 A SCx/SDx downstream pair, or channel, is selected by the contents of the control register. This register is written after the PCA9544A has been addressed. The 3 LSBs of the control byte are used to determine which channel is to be selected. When a channel is selected, it will become active after a stop condition has been placed on the I2C-bus. This ensures that all SCx/SDx lines will be in a HIGH state when the channel is made active, so that no false conditions are generated at the time of connection. 0 X X 1 0 X X X 1 Table 1. Control Register; Write -- Channel Selection/ Read -- Channel Status X X X X 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 INT3 INT2 INT1 INT0 D3 B2 B1 B0 X X X X X 0 X X No channel selected NOTE: Several interrupts can be active at the same time. Ex: 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. X X X X X 1 0 0 Channel 0 enabled POWER-ON RESET 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 2004 Sep 29 COMMAND When power is applied to VDD, an internal Power On Reset holds the PCA9544A in a reset condition until VDD 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, VDD must be lowered below 0.2 V to reset the device. 5 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A Figure 6 shows the voltage characteristics of the pass gate transistors (note that the graph was generated using the data specified in the DC Characteristics section of this datasheet). In order for the PCA9544A to act as a voltage translator, the Vpass voltage should be equal to, or lower than the lowest bus voltage. For example, if the main bus was running at 5 V, and the downstream buses were 3.3 V and 2.7 V, then Vpass should be equal to or below 2.7 V to effectively clamp the downstream bus voltages. Looking at Figure 6, we see that Vpass (max.) will be 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. Pull-up resistors can then be used to bring the bus voltages to their appropriate levels (see Figure 13). VOLTAGE TRANSLATION The pass gate transistors of the PCA9544A are constructed such that the VDD voltage can be used to limit the maximum voltage that will be passed from one I2C-bus to another. Vpass vs. VDD 5.0 4.5 MAXIMUM 4.0 TYPICAL 3.5 Vpass More Information can be found in Application Note AN262 PCA954X family of I 2C/SMBus multiplexers and switches. 3.0 2.5 2.0 MINIMUM 1.5 1.0 2.0 2.5 3.0 3.5 4.0 VDD 4.5 5.0 5.5 SW00820 Figure 6. Vpass voltage 2004 Sep 29 6 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A CHARACTERISTICS OF THE I2C-BUS Start and stop conditions The I2C-bus is for 2-way, 2-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 pull-up resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy. 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 8). Bit transfer System configuration 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 will be interpreted as control signals (see Figure 7). A device generating a message is a `transmitter', a device receiving is the `receiver'. The device that controls the message is the `master' and the devices which are controlled by the master are the `slaves' (see Figure 9). SDA SCL data line stable; data valid change of data allowed SW00363 Figure 7. Bit transfer SDA SDA SCL SCL S P START condition STOP condition SW00365 Figure 8. Definition of start and stop conditions SDA SCL MASTER TRANSMITTER/ RECEIVER SLAVE RECEIVER SLAVE TRANSMITTER/ RECEIVER MASTER TRANSMITTER MASTER TRANSMITTER/ RECEIVER I2C MULTIPLEXER SLAVE SW00366 Figure 9. System configuration 2004 Sep 29 7 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A Acknowledge 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 acknowledge bit. The acknowledge bit is a HIGH level put on the bus by the transmitter whereas the master generates an extra acknowledge related clock pulse. A slave receiver which is addressed must generate an acknowledge after the reception of each byte. Also a master must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter. The device that acknowledges has to pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse, set-up and hold times must be taken into account. A master receiver must signal an end of data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event, the transmitter must leave the data line HIGH to enable the master to generate a stop condition. DATA OUTPUT BY TRANSMITTER not acknowledge DATA OUTPUT BY RECEIVER acknowledge SCL FROM MASTER 1 2 8 9 S clock pulse for acknowledgement START condition SW00368 Figure 10. Acknowledgement on the SLAVE ADDRESS SDA S 1 1 1 0 A2 I2C-bus CONTROL REGISTER A1 A0 start condition 0 R/W A X X X X X B2 acknowledge from slave B0 B1 A P acknowledge from slave SW00802 Figure 11. WRITE control register CONTROL REGISTER SLAVE ADDRESS SDA S 1 1 start condition 1 0 A2 A1 A0 1 R/W A INT3 INT2 INT1 INT0 X acknowledge from slave B2 last byte B1 B0 NA no acknowledge from master P stop condition SW00378 Figure 12. READ control register 2004 Sep 29 8 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A TYPICAL APPLICATION VDD = 2.7 - 5.5 V VDD = 3.3 V V = 2.7 - 5.5 V SEE NOTE (1) SDA SDA SD0 SCL SCL SC0 CHANNEL 0 INT INT0 V = 2.7 - 5.5 V SEE NOTE (1) I2C/SMBus MASTER SD1 CHANNEL 1 SC1 INT1 V = 2.7 - 5.5 V SEE NOTE (1) SD1 CHANNEL 2 SC1 INT2 V = 2.7 - 5.5 V SEE NOTE (1) SD1 CHANNEL 3 A2 SC1 A1 NOTE: 1. If the device generating the Interrupt has an open-drain output structure or can be tri-stated, a pull-up resistor is required. INT3 A0 VSS If the device generating the Interrupt has a totem-pole output structure and cannot be tri-stated, a pull-up resistor is not required. PCA9544A The Interrupt inputs should not be left floating. SW02268 Figure 13. Typical application 2004 Sep 29 9 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A ABSOLUTE MAXIMUM RATINGS1, 2 In accordance with the Absolute Maximum Rating System (IEC 134).Voltages are referenced to GND (ground = 0 V). RATING UNIT DC supply voltage -0.5 to +7.0 V VI DC input voltage -0.5 to +7.0 V II DC input current 20 mA SYMBOL VDD PARAMETER CONDITIONS IO DC output current 25 mA IDD Supply current 100 mA ISS Supply current 100 mA Ptot total power dissipation 400 mW Tstg Storage temperature range -60 to +150 C Tamb Operating ambient temperature -40 to +85 C NOTES: 1. Stresses beyond those listed 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. 2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150C. 2004 Sep 29 10 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A DC CHARACTERISTICS VDD = 2.3 V to 3.6 V; VSS = 0 V; Tamb = -40 C to +85 C; unless otherwise specified. (See page 12 for VDD = 3.6 V to 5.5 V) LIMITS SYMBOL PARAMETER TEST CONDITIONS UNIT MIN TYP MAX 2.3 -- 3.6 V Operating mode; VDD = 3.6 V; no load; VI = VDD or VSS; fSCL = 100 kHz -- 10 30 A Standby mode; VDD = 3.6 V; no load; VI = VDD or VSS; fSCL = 0 kHz -- 0.1 1 A no load; VI = VDD or VSS -- 1.5 2.1 V Supply VDD Supply voltage IDD Supply current Istb Standby current VPOR Power-on reset voltage (Note 1) Input SCL; input/output SDA VIL LOW-level input voltage -0.5 -- 0.3VDD V VIH HIGH-level input voltage 0.7VDD -- 6 V IOL O LOW level output current LOW-level IL Leakage current Ci Input capacitance VOL = 0.4 V 3 7 -- VOL = 0.6 V 6 10 -- VI = VDD or VSS -1 -- +1 A VI = VSS -- 10 13 pF mA Select inputs A0 to A2 / INT0 to INT3 VIL LOW-level input voltage -0.5 -- +0.3VDD V VIH HIGH-level input voltage 0.7VDD -- VDD + 0.5 V ILI Input leakage current Ci Input capacitance VI = VDD or VSS -1 -- +1 A VI = VSS -- 1.6 3 pF VCC = 3.0 V to 3.6 V, VO = 0.4 V, IO = 15 mA 5 11 30 VCC = 2.3 V to 2.7 V, VO = 0.4V, IO = 10 mA 7 16 55 Vswin = VDD = 3.3 V; Iswout = -100 A -- 1.9 -- Vswin = VDD = 3.0 V to 3.6 V; Iswout = -100 A 1.6 -- 2.8 Vswin = VDD = 2.5 V; Iswout = -100 A -- 1.5 -- Vswin = VDD = 2.3 V to 2.7 V; Iswout = -100 A 1.1 -- 2.0 Pass Gate RON O VPass Switch resistance Switch output voltage V VI = VDD or VSS -1 -- +1 A Input/output capacitance VI = VSS -- 3 5 pF IOL LOW-level output current VOL = 0.4 V 3 7 -- mA IOH HIGH-level output current -- -- +10 A IL Cio Leakage current INT Output NOTES: 1. VDD must be lowered to 0.2 V in order to reset part. 2. For operation between published voltage ranges, refer to worst case parameter in both ranges. 2004 Sep 29 11 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A DC CHARACTERISTICS VDD = 4.5 V to 5.5 V; VSS = 0 V; Tamb = -40 C to +85 C; unless otherwise specified. (See page 11 for VDD = 2.3 V to 3.6 V) LIMITS SYMBOL PARAMETER TEST CONDITIONS UNIT MIN TYP MAX 4.5 -- 5.5 V Operating mode; VDD = 5.5 V; no load; VI = VDD or VSS; fSCL = 100 kHz -- 25 100 A Standby mode; VDD = 5.5 V; no load; VI = VDD or VSS; fSCL = 0 kHz -- 0.3 1 A no load; VI = VDD or VSS -- 1.7 2.1 V Supply VDD Supply voltage IDD Supply current Istb Standby current VPOR Power-on reset voltage Input SCL; input/output SDA VIL LOW-level input voltage -0.5 -- 0.3VDD V VIH HIGH-level input voltage 0.7VDD -- 6 V 3 -- -- mA IOL O LOW level output current LOW-level IL Leakage current Ci Input capacitance VOL = 0.4 V VOL = 0.6 V 6 -- -- mA VI = VDD or VSS -1 -- +1 A VI = VSS -- 12 13 pF Select inputs A0 to A2 / INT0 to INT3 VIL LOW-level input voltage -0.5 -- +0.3VDD V VIH HIGH-level input voltage 0.7VDD -- VDD + 0.5 V ILI Input leakage current pin at VDD or VSS -1 -- +1 A Ci Input capacitance VI = VSS -- 2 5 pF RON Switch resistance VCC = 4.5 V to 5.5 V, VO = 0.4 V, IO = 15 mA 4 9 24 3.6 -- V Switch output voltage Vswin = VDD = 5.0 V; Iswout = -100 A -- VPass Vswin = VDD = 4.5 V to 5.5 V; Iswout = -100 A 2.6 - 4.5 V VI = VDD or VSS -1 -- +1 A Input/output capacitance VI = VSS -- 3 5 pF IOL LOW-level output current VOL = 0.4 V 3 -- -- mA IOH HIGH-level output current -- -- +10 A Pass Gate IL Cio Leakage current INT Output NOTES: 1. VDD must be lowered to 0.2 V in order to reset part. 2. For operation between published voltage ranges, refer to worst case parameter in both ranges. 2004 Sep 29 12 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A AC CHARACTERISTICS SYMBOL STANDARD-MODE I2C-bus PARAMETER FAST-MODE I2C-bus UNIT MIN MAX MIN MAX Propagation delay from SDA to SDn or SCL to SCn -- 0.31 -- 0.31 ns fSCL SCL clock frequency 0 100 0 400 kHz tBUF Bus free time between a STOP and START condition 4.7 -- 1.3 -- s Hold time (repeated) START condition After this period, the first clock pulse is generated 4.0 -- 0.6 -- s tLOW LOW period of the SCL clock 4.7 -- 1.3 -- s tHIGH HIGH period of the SCL clock 4.0 -- 0.6 -- s tpd tHD;STA tSU;STA Set-up time for a repeated START condition 4.7 -- 0.6 -- s tSU;STO Set-up time for STOP condition 4.0 -- 0.6 -- s tHD;DAT Data hold time 02 3.45 02 0.9 s tSU;DAT Data set-up time ns 250 -- 100 -- tR Rise time of both SDA and SCL signals -- 1000 20 + 0.1Cb3 300 ns tF Fall time of both SDA and SCL signals -- 300 20 + 0.1Cb3 300 s Cb Capacitive load for each bus line -- 400 -- 400 s tSP Pulse width of spikes which must be suppressed by the input filter -- 50 -- 50 ns tVD:DATL Data valid (HL)4 -- 1 -- 1 s tVD:DATH Data valid (LH)4 -- 0.6 -- 0.6 s tVD:ACK Data valid Acknowledge -- 1 -- 1 s tiv INTn to INT active valid time4 -- 4 -- 4 s tir INTn to INT inactive delay time4 -- 2 -- 2 s Lpwr LOW level pulse width rejection of INTn inputs4 10 -- 1 -- ns Hpwr HIGH level pulse width rejection of INTn inputs4 500 -- 500 -- ns INT NOTES: 1. Pass gate propagation delay is calculated from the 20 typical RON and and the 15 pF load capacitance. 2. A device must internally provide a hold time of at least 300ns for the SDA signal (referred to the VIH(min) of the SCL signal) in order to bridge the undefined region of the falling edge of SCL. 3. Cb = total capacitance of one bus line in pF. 4. Measurements taken with 1 k pull-up resistor and 50 pF load. SDA tBUF tLOW tR tF tHD;STA tSP SCL tHD;STA P S tSU;STA tHD;DAT tHIGH tSU;DAT Sr tSU;STO P SU00645 Figure 14. Definition of timing on the I2C-bus 2004 Sep 29 13 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic SO20: plastic small outline package; 20 leads; body width 7.5 mm 2004 Sep 29 14 PCA9544A SOT163-1 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm 2004 Sep 29 15 PCA9544A SOT360-1 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A HVQFN20: plastic thermal enhanced very thin quad flat package; no leads; 20 terminals; body 5 x 5 x 0.85 mm 2004 Sep 29 16 SOT662-1 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A REVISION HISTORY Rev Date Description _2 2004929 Product data sheet (9397 750 13931). Supersedes data of 2004 Jul 28 (9397 750 13301). Modifications: * Table 1. "Control Register; Write -- Channel Selection / Read -- Channel Status" on page 5: add `no channel selected; power-up default state' row to bottom of table * DC characteristics table (VDD = 2.3 V to 3.6 V) on page 11: - Supply change IDD Typ. from 20 A to 10 A change IDD Max. from 50 A to 30 A - Input SCL; input/output SDA change IOL Typ. (VOL = 0.4 V) from "-" to 7 mA change IOL Typ. (VOL = 0.6 V) from "-" to 10 mA change Ci Typ. from 12 pF to 10 pF - Select inputs A0 to A2 / INT0 to INT3 change Test conditions for ILI from "pin at VDD or VSS" to "VI = VDD or VSS" - INT output change IOL Typ. from "-" to 7 mA change IOH Max. from +100 A to +10 A - Add Note 2. * DC characteristics table (VDD = 4.5 V to 5.5 V) on page 12: - change description from "VDD = 3.6 V to 5.5 V" to "VDD = 4.5 V to 5.5 V" - Supply change VDD Min. from 3.6 V to 4.5 V change IDD Typ. from 65 A to 25 A - Input SCL; input/output SDA remove parameters IIL and IIH add parameter IL - Select inputs A0 to A2 / INT0 to INT3; change ILI Max. from +50 A to +1 A - Pass Gate change IL Min. from -10 A to -1 A change IL Max. from +100 A to +1 A - INT output; change IOH Max from +100 A to +10 A - Add Note 2. * AC characteristics table on page 13: - add reference to (new) Note 4 at parameters tVD:DATL and tVD:DATH - INT Add reference to (new) Note 4 in all 4 parameter descriptions Lpwr and Hpwr: change "or" to "of" - Add Note 4. _1 2004 Sep 29 20040728 Objective data sheet (9397 750 13301). 17 Philips Semiconductors Product data sheet 4-channel I2C multiplexer with interrupt logic PCA9544A Purchase of Philips I2C components conveys a license under the Philips' I2C patent to use the components in the I2C system provided the system conforms to the I2C specifications defined by Philips. This specification can be ordered using the code 9398 393 40011. Data sheet status Level Data sheet status [1] Product status [2] [3] Definitions I Objective data sheet Development This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. II Preliminary data sheet Qualification This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. III Product data sheet Production This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). [1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. [3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. Definitions Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support -- These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes in the products--including circuits, standard cells, and/or software--described or contained herein in order to improve design and/or performance. When the product is in full production (status `Production'), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Koninklijke Philips Electronics N.V. 2004 All rights reserved. Printed in U.S.A. Contact information For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825 Date of release: 09-04 For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com. Document number: 2004 Sep 29 18 9397 750 13931