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PI3B3257
3.3V, Quad 2:1
Mux/Demux Bus Switch
Product Features
聲 Near zero propagation delay
聲 5-ohm switches connect inputs to outputs
聲 Fast Switching Speed: 4.8ns max.
聲
聲
Ultra-Low Quiescent Power: 0.1碌A(chǔ) typical
聳 Ideally suited for notebook applications
Pin compatible with 74 series 257 logic devices
Product Description
Pericom Semiconductor聮s PI3B series of logic circuits are produced
using the Company聮s advanced submicron CMOS technology,
achieving industry leading performance.
The PI3B3257 is a 3.3 Volt, 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.
聲 Packages available:
聳 16-pin 150 mil wide plastic QSOP (Q)
聳 16-pin 150 mil wide plastic SOIC (W)
聳 16-pin 173 mil wide plastic TSSOP (L)
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
14
16-Pin
13
Q, W, L
12
V
CC
E
ID0
ID1
YD
IC0
IC1
YC
E
IB1
YB
GND
S
11
10
9
Product Pin Description
YA
YB
YC
YD
Pin Name
IAn- IDn
S
E
De s cription
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
No Connect
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
YA- YD
GND
Vcc
NC
Note:
1. H = High Voltage Level
L = Low Voltage Level
1
PS8151F
05/07/01
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