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PI5C3257C
Quad 2:1 Mux/Demux BusSwitch
with 鈥?V Undershoot Protection
Product Features
鈥?Near zero propagation delay
鈥?5ohms switches connect inputs to outputs
鈥?Direct bus connection when switches are ON
鈥?Undershoot Protection to 鈥?V (Data Inputs Only)
鈥?Pin compatible with 74 series 257 logic devices
鈥?Packages available:
鈥?16-pin 150 mil wide plastic QSOP (Q)
鈥?16-pin 173 mil wide plastic TSSOP (L)
Product Description
Pericom Semiconductor鈥檚 PI5C series of logic circuits are produced
using the Company鈥檚 advanced submicron CMOS technology,
achieving industry leading performance.
The PI5C3257C is a Quad 2:1 multiplexer/demultiplexer with three-
state outputs that is pinout and function compatible with the
PI74FCT257T. Inputs can be connected to outputs with low on
resistance (5ohms) with no additional ground bounce noise or
propagation delay.
Logic Block Diagram
IA
0
IA
1
IB
0
IB
1
IC
0
IC
1
ID
0
ID
1
16-Pin Product Configuration
S
IA0
IA1
YA
E
1
2
3
4
5
6
7
8
16
15
14
V
CC
E
ID0
ID1
YD
IC0
IC1
YC
IB0
IB1
YB
16-Pin
L,Q
12
11
10
9
13
S
GND
Product Pin Description
Pin Name
YA
YB
YC
YD
De s cription
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
No Connect
IAN- IDN
S
Truth Table
(1)
E
H
L
L
S
X
L
H
YA
Hi- Z
IA
0
IA
1
YB
Hi- Z
IB
0
IB
1
YC
Hi- Z
IC
0
IC
1
YD
Hi- Z
ID
0
ID
1
Function
Disable
S=0
S=1
E
YA- YD
GND
Vcc
NC
Note:
1. H = High Voltage Level
L = Low Voltage Level
1
PS8513
02/21/01
1
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