1
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Diodes Incorporated
PI5C3257
Document Number DS41338 Rev 1-2
Pin Description
Pin Name Description
IAn-IDn Data Inputs
S Select Inputs
E Enable
YA-YD Data Outputs
GND Ground
Vcc Power
Description
e PI5C3257 is a Quad 2:1 multiplexer/demultiplexer with
three-state outputs that is pinout and function compatible with
the PI74FCT257T, 74F257, and 74ALS/AS/LS257. Inputs can be
connected to outputs with low On-Resistance (5Ω) with no additional
ground bounce noise or propagation delay.
Block Diagram
Features
¼Near-Zero propagation delay
¼5Ω switches connect inputs to outputs
¼Direct bus connection when switches are ON
¼Ultra Low Quiescent Power (0.2µA typical)
– Ideally suited for notebook applications
¼Pin compatible with 74 series 257 logic devices
¼Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
¼Halogen and Antimony Free. “Green” Device (Note 3)
¼Packaging (Pb-free & Green available):
– 16-pin, QSOP (Q)
– 16-pin, TSSOP (L)
– 16-pin, UQFN (ZHD)
Pin Configuration (QSOP, TSSOP)
Truth Table(1)
E S YA YB YC YD Function
H X Hi-Z Hi-Z Hi-Z Hi-Z Disable
L L IA0 IB0 IC0 ID0 S = 0
L H IA1 IB1 IC1 ID1 S = 1
Note:
1. H = High Voltage Level, L = Low Voltage Level
E
IA0 IA1 IB0 IB1 IC0 IC1 ID0 ID1
S
YA YB YC YD
1
2
3
4
5
16
6
15
7
14
8
13
12
11
10
9
S
IA0
IA1
YA
IB0
IB1
YB
GND
VCC
E
ID0
ID1
YD
IC0
IC1
YC
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Diodes Incorporated
PI5C3257
Quad 2:1 Mux/DeMux Bus Switch
1
2
3
4
5 6 7 8
12
11
10
9
16 15 14 13
S
I 0
A
I 1
A
A
Y
I 0
B
I 1
B
B
Y
GND
C
Y
I 1
C
I 0
C
D
Y
I 0
I 1
D
E
VCC
D
Pin Configuration (UQFN)
b
P
Lead-free Green
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s denitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are dened as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm
antimony compounds.
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Diodes Incorporated
PI5C3257
Document Number DS41338 Rev 1-2
Storage Temperature ...........................................................–65°C to +150°C
Ambient Temperature with Power Applied ..........................–40°C to +85°C
Supply Voltage to Ground Potential (Inputs & VCC Only) .... –0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) .–0.5V to +7.0V
DC Input Voltage ...................................................................–0.5V to +7.0V
DC Output Current ..............................................................................120mA
Power Dissipation .................................................................................. 0.5W
Note:
Stresses greater than those listed under MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
these or any other conditions above those indicated in the
operational sections of this specication is not implied. Ex-
posure to absolute maximum rating conditions for extended
periods may affect reliability.
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1) Description Test Conditions Typ. Max. Units
cIN Input Capacitance
VIN = 0V
6
pFcOFF In/Yn Capacitance, Switch Off 6
cON In/Yn Capacitance, Switch On 14
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±5%)
Parameters Description Test Conditions(1) Min. Typ.(2) Max. Units
VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V
VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8
IIH Input HIGH Current Vcc = Max., VIN = Vcc ±1
µAIIL Input LOW Current Vcc = Max., VIN = GND ±1
IOZH High Impedance Output Current 0 ≤ I, Y ≤ Vcc ±1
VIK Clamp Diode Voltage Vcc = Min., IIN = –18 mA –0.7 –1.2 V
IOS Short Circuit Current(3) I (Y) = 0V, Y (I) = Vcc 100 mA
VHInput Hysteresis at Control Pins 150 mV
RON Switch On-Resistance(4) Vcc = Min., VIN = 0.0V, ION = 48mA 5 7 Ω
Vcc = Min., VIN = 2.4V, ION = 15mA 10 15
Notes:
1. For Max. or Min. conditions, use appropriate value specied under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, TA = 25°C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. Measured by the voltage drop between I and Y pin at indicated current through the switch. On-Resistance is determined by the lower of the voltages on the two (I,Y)
pins.
Notes:
1. This parameter is determined by device characterization but is not production tested.
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Document Number DS41338 Rev 1-2
Switching Characteristics over Operating Range
Parameters Description Conditions Com. Units
Min. Max.
tIY Propagation Delay(1,2)
In to Yn
cL = 50pF
RL = 500Ω
0.25
ns
tSY Bus Select Time
Sn to Yn 0.5 5.2
tPZH
tPZL
Bus Enable Time
E to Yn 0.5 4.8
tPHZ
tPLZ
Bus Disable Time
E to Yn 0.5 5.0
Power Supply Characteristics
Parameters Description Test Conditions(1) Min. Typ.(2) Max. Units
Icc Quiescent Power
Supply Current Vcc = Max.VIN = GND
or Vcc 0.1 3.0 µA
∆Icc Supply Current per
Input @ TTL HIGH Vcc = Max. VIN = 3.4V(3) 2.5 mA
IccD Supply Current per
Input per MHz(4)
Vcc = Max.,
I and Y Pins Open
BE = GND
Control Input Toggling
50% Duty Cycle
0.25 mA/
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specied under Electrical Characteristics for the applicable device.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs only); I and Y pins do not contribute to ICC.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specied frequency. The I and Y inputs generate
no signicant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The time constant for the
switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little
propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch
and its interaction with the load on the driven side.
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PI5C3257
Document Number DS41338 Rev 1-2
PI5C
3257QE
YWXX
Y: Year
W: Workweek
1st X: Assembly Site Code
2nd X: Fab Site Code
Bar above “I” means Fab3 of MGN
Bar above fab code means Cu wire
Part marking
Q Package L Package
PI5C
3257LE
YYWWXX
YY: Year
WW: Workweek
1st X: Assembly Site Code
2nd X: Fab Site Code
Bar above “I” means Fab3 of MGN
Bar above fab code means Cu wire
ZHD Package
wGZHDE
YWXX
Y: Year
W: Workweek
1st X: Assembly Site Code
2nd X: Fab Site Code
Bar above “G” means Fab3 of MGN
Bar above 2nd “X” means Cu wire
wG = PI5C3257ZHDE
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PI5C3257
Document Number DS41338 Rev 1-2
16-0056
Packaging Mechanical: 16-QSOP (Q)
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PI5C3257
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Diodes Incorporated
PI5C3257
Document Number DS41338 Rev 1-2
16-0061
Packaging Mechanical: 16-TSSOP (L)
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PI5C3257
Document Number DS41338 Rev 1-2
PKG. DIMENSIONS(MM)
SYMBOL Min Max
A1 0.00
A3
D2.90 3.10
D1
E1 1.60 1.90
b
e
0.05
A0.50 0.65
E2.90 3.10
0.50 BSC
1.60 1.90
0.15 REF
0.18 0.30
L0.25 0.55
PIN1
Index Area
D
E
A
A1
A3
D1
E1
e
L
b
DATE: 07/27/16
DESCRIPTION: 16-Pin, UQFN, 3X3
PACKAGE CODE: ZHD(ZHD16)
DOCUMENT CONTROL#: PD-2209 REVISION: --
Top View
16X0.27
0.50BSC
2.90
2.90
1.60
1.60
0.70x16
Bottom View
Side View
RECOMMENDED LAND PATTERN(unit:mm)
Note:
1. Comply with MO-248E,except 'L' MIN and 'L' 'D1' 'E1' MAX
N1
N4
N5
N8
N9
N12
N13 N16
16-0092
Packaging Mechanical: 16-UQFN (ZHD)
Ordering Information
Ordering Code Packaging Code Package Description
PI5C3257QEX Q 16-pin, 150-mil Wide (QSOP)
PI5C3257LEX L16-pin, 173-mil Wide (TSSOP)
PI5C3257ZHDEX ZHD 16-pin, 3x3 (UQFN)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s denitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are dened as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm
antimony compounds.
4. E = Pb-free and Green
5. X sufx = Tape/Reel
For latest package info.
please check: http://www.diodes.com/design/support/packaging/pericom-packaging/packaging-mechanicals-and-thermal-characteristics/
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A product Line of
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PI5C3257
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Diodes Incorporated
PI5C3257
Document Number DS41338 Rev 1-2
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER
THE LAWS OF ANY JURISDICTION).
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tice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or
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native format released by Diodes Incorporated.
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failure of the life support device or to affect its safety or effectiveness.
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