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PI5C3244
8-Bit, 2-Port Switch
Features:
• Near-Zero propagation delay
• 5-ohm switches connect inputs to outputs when enabled
• Direct bus connection when switches are ON
• Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• Pin compatible with 74 Series 244 logic devices
• Packaging (Pb-free & Green available):
– 20-pin 173-mil wide plastic TSSOP (L)
– 20-pin 150-mil wide plastic QSOP (Q)
– 20-pin 300-mil wide plastic SOIC (S)
Description:
Pericom Semiconductor’s PI5C3244 features a set of eight bus
switches which is pinout and function compatible with the
PI74FCT244T, 74F244, and 74ALS/AS/LS 244 8-bit drivers. Two
enable signals (BEn) turn the switches on similar to the enable
signals of the 244. The bus switch creates no additional propagation
delay or ground bounce noise.
Block Diagram
BE
1
1A
0
1A
1
1A
2
1A
3
1B
0
1B
1
1B
2
1B
3
Pin Configuration
BE
1
1
A
0
2
B
3
1
A
1
2
B
2
1
A
2
2
B
1
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
BE
2
1
B
0
2
A
3
1
B
1
2
A
2
1
B
2
2
A
1
1
B
3
2
A
0
BE
2
1
A
3
2A
0
2A
1
2A
2
2A
3
2B
0
2B
1
2B
2
2B
3
2
B
0
GND
Pin Description
Truth Table
(1)
BE
1
H
L
H
L
BE
2
H
H
L
L
1A, 1B
Disconnect
1A = 1B
Disconnect
1A = 1B
2A, 2B
Disconnect
Disconnect
2A = 2B
2A = 2B
Pin Name
BEn
A
0
-A
3
B
0
-B
3
GND
V
CC
Description
Bus Output Enable (Active LOW)
Bus A
Bus B
Ground
Power
Note:
1. H = High Voltage Level
L = Low Voltage Level
1
PS7014C
09/2804
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
