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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3251
3.3V, 8:1 Mux/Demux BusSwitch
Product Features
聲 Near zero propagation delay
聲 5 Ohm switches connect inputs to outputs
聲
聲
Ultra Low Quiescent Power (0.1碌A(chǔ) Typical)
聳 Ideally suited for notebook applications
Pin compatible with 74 series 251 logic devices
Product Description
Pericom Semiconductor聮s PI3B series of logic circuits are produced
using the Company聮s advanced sub micron CMOS technology,
achieving industry leading performance.
The PI3B3251 is a 3.3V Dual 8:1 Multiplexer/demultiplexer with three-
state outputs that is pinout compatible with the PI74FCT251T,
74F251, and 74ALS/AS/LS 251. Inputs can be connected to outputs
with low on resistance (5 Ohm) 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
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Product Pin Configuration
16
I
3
I
2
I
1
I
0
Y
NC
E
GND
1
2
V
CC
I
4
I
5
I
6
I
7
S
0
S
1
S
2
E
S
0
S
1
S
2
15
16-Pin
3
Q, W, L
14
13
4
12
5
6
7
8
11
10
9
Product Pin Description
Y
Pin Name
I
0
鈥?/div>
7
S
0
鈥?/div>
2
E
Y
GND
V
CC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
Truth Table
(1)
E
H
L
L
L
L
L
L
L
L
S
2
X
L
L
L
L
H
H
H
H
Select
S
1
X
L
L
H
H
L
L
H
H
S
0
X
L
H
L
H
L
H
L
H
Y
Hi-Z
I0
I1
I2
I3
I4
I5
I6
I7
Function
Disable
S2-0 = 0
S2-0 = 1
S2-0 = 2
S2-0 = 3
S2-0 = 4
S2-0 = 5
S2-0 = 6
S2-0 = 7
Note:
1. H = High Voltage Level
L = Low Voltage Level
1
PS8150D
01/05/00
1
2
3
