PI5C3253
Dual 4:1 Mux/DeMux Bus Switch
Features
• Near-Zero propagation delay
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• Pin compatible with 74 series 253 logic devices
• Packaging (Pb-free & Green available):
– 16-pin 150-mil wide plastic QSOP (Q)
– 16-pin 300-mil wide plastic SOIC (S)
– 16-pin 150-mil wide plastic SOIC (W)
– 16-pin 173-mil wide plastic TSSOP (L)
Description
Pericom Semiconductor’s PI5C3253 is a Dual 4:1 Multiplexer/
demultiplexer with three-state outputs that is pinout compatible
with the PI74FCT253T, 74F253, and 74ALS/AS/LS 253. Inputs
can be connected to outputs with low on resistance (5Ω) with no
additional ground bounce noise or propagation delay.
Block Diagram
IA0
IA1
IA2
IA3
IB0
IB1
IB2
IB3
Pin Configuration
EA
S1
IA3
IA2
IA1
IA0
YA
GND
YA
YB
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
EB
S0
IB3
IB2
IB1
IB0
YB
EA
EB
S0
S1
Truth Table
(1)
Enable
EA
EB
H
X
X
H
L
L
L
L
L
L
L
L
Select
S
1
S
0
X
X
X
X
L
L
L
H
H
L
H
H
YA
Hi-Z
X
IA
0
IA
1
IA
2
IA
3
YB
X
Hi-Z
IB
0
IB
1
IB
2
IB
3
Function
Disable A
Disable B
S1-0 = 0
S1-0 = 1
S1-0 = 2
S1-0 = 3
Pin Description
Pin Name
IAn, IBn
S0–1
EA, EB
YA, YB
GND
V
CC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
Note:
1. H = High Voltage Level, L = Low Voltage Level
1
PS7017C
09/14/04
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
