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PI5C32245
8-Bit, 2-Port Bus Switch
with 25ohm Series Resistor
Product Features:
聲 Near zero propagation delay
聲 25ohm series resistor termination
聲 5ohm switches connect inputs to outputs
聲 Direct bus connection when switches are ON
聲 Ultra Low Quiescent Power (0.2 碌A(chǔ) Typical)
聳 Ideally suited for notebook applications
聲 Pin compatible with 74 series 245 logic devices
聲 Packages available:
聳 20-pin 150 mil wide plastic QSOP (Q)
Product Description:
Pericom Semiconductor聮s PI5C series of logic circuits are
produced in the Company聮s advanced submicron CMOS technology,
achieving industry leading performance.
The PI5C32245 is a 8-bit, 2-port bus switch designed with a low
ON resistance (5ohm) allowing inputs to be connected directly to
outputs. The bus switch creates no additional propagational delay
or additional ground bounce noise. The switches are turned ON by
the Bus Enable (BE) input signal. Pinout is compatible with
PI74FCT245T (Octal Bidirectional Transceiver). The device has a
built-in 25ohm resistor to reduce noise resulting from reflections,
thus eliminating the need for an external terminating resistor.
Logic Block Diagram
Product Pin Configuration
A
0
B
0
NC
A
0
A
1
A
2
1
2
20
19
V
CC
BE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
3
18
4
20-Pin
17
5
6
7
8
9
10
Q
A
7
B
7
A
3
A
4
A
5
A
6
A
7
GND
16
15
14
13
12
11
BE
Truth Table
Function
Disconnect
Connect
(1)
Product Pin Description
BE
H
L
A
0聳7
Hi-Z
B
0聳7
Pin Name
BE
A
0
聳
7
B
0
聳
7
GND
V
CC
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
Note:
1. H
= High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
1
PS8136
08/20/97
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