PI5C3251_11 Datasheet, PDF (1/4 Pages) Pericom Semiconductor Corporation – 8:1 Mux/DeMux BusSwitch

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)
– Ideallysuited for notebook applications
•  Pin compatible with 74 series 251 logic devices
• Packaging (Pb-free & Green available):
– 16-pin 150-mil wide plastic QSOP (Q)
PI5C3251
8:1 Mux/DeMux BusSwitch ₁
2
Description:
Pericom Semiconductor’s PI5C3251 is a Dual 8:1 Multiplexer/
3 ^{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 (5Ω) with no
additional ground bounce noise or propagation delay.
4
5
Block Diagram
I0 I1 I2 I3 I4 I5 I6 I7
E
S0
S1
S2
Y
Pin Configuration
I3 1
I2 2
I1 3
I0 4
Y
5
NC 6
E
7
GND 8
16 VCC
15 I4
14 I5
13 I6
12 I7
11 S0
10 S1
9 S2
Truth Table⁽¹⁾
Select
E
S2
S1
S0
Y
Function
H
X
X
X Hi-Z
Disable
L
L
L
L
I0
S2-0 = 0
L
L
L
H
I1
S2-0 = 1
L
L
H
L
I2
S2-0 = 2
L
L
H
H
I3
S2-0 = 3
L
H
L
L
I4
S2-0 = 4
L
H
L
H
I5
S2-0 = 5
L
H
H
L
I6
S2-0 = 6
L
H
H
H
I7
S2-0 = 7
Note:
1.H = High Voltage Level, L = Low Voltage Level
11-0009
Pin Description
Pin Name
Description
I0–7
Data Inputs
S0–2
Select Inputs
E
Enable
Y
Data Outputs
GND
Ground
V_CC
Power
1
6
7
8
9
10
11
12
13
14
15
01/11/10