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PI5C3257
Quad 2:1 Mux/Demux BusSwitch
Product Features:
聲
聲
聲 Near zero propagation delay
聲 5ohm switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra Low Quiescent Power (0.2碌A(chǔ) Typical)
聳 Ideally suited for notebook applications
聲 Pin compatible with 74 series 257 logic devices
聲 Packages available:
聳 16-pin 150 mil wide plastic QSOP (Q)
聳 16-pin 300 mil wide plastic SOIC (S)
聳 16-pin 150 mil wide plastic SOIC (W)
聳 16-pin 173 mil wide plasticTSSOP (L)
聳 20-pin 150 mil wide plastic TSSOP (R)
Product Description
Pericom Semiconductor聮s PI5C series of logic circuits are produced
using the Company聮s advanced submicron CMOS technology,
achieving industry leading performance.
The 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 (5 Ohms) 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
IB0
1
2
3
4
5
6
7
8
16
15
V
CC
E
ID0
ID1
YD
IC0
IC1
YC
16-Pin
L, Q,
13
S, W
14
12
11
E
IB1
YB
GND
10
9
S
20-Pin Product Configuration
NC
S
YA
YB
YC
YD
1
2
3
4
5
6
7
8
9
10
20
19
18
NC
V
CC
E
ID0
ID1
YD
IC0
IC1
YC
NC
IA0
IA1
YA
Truth Table
(1)
E
H
L
L
S
X
L
H
YA
Hi-Z
IA0
IA1
YB
Hi-Z
IB0
IB1
YC
Hi-Z
IC0
IC1
YD
Hi-Z
ID0
ID1
Function
Disable
S=0
S=1
Product Pin Description
Pin Name
IAn-IDn
S
E
YA-YD
GND
V
CC
NC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
No Connect
20-Pin
16
R
15
14
13
12
11
17
IB0
IB1
YB
GND
NC
Note:
1. H = High Voltage Level
L = Low Voltage Level
1
PS7018B
03/17/00
1
2
3
