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www.pericom.com PS8430D 09/30/10 All trademarks are property of their respective owners.
PI3C32X384
Block Diagram
BE
B
BE
A
A
19
A
15
B
19
B
15
A
4
A
0
B
4
B
0
BE
D
BE
C
A
14
A
10
B
14
B
10
A
9
A
5
B
9
B
5
Pin Configuration
BEA 1
B
0
2
A
0 3
A
1 4
B
1 5
B
2
6
A
2 7
A
3 8
B
3 9
B
4 10
A
4 11
GND 12
BE
C 13
B
5 14
A
5 15
A
6
16
B
6 17
B
7
18
A
7
19
A
8
20
B
8 21
B
9 22
A
9 23
GND 24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
VCC
B
19
A19
A18
B18
B
17
A17
A16
B16
B15
A15
BEB
VCC
B
14
A14
A
13
B13
B
12
A
12
A
11
B11
B10
A10
BED
Description
Pericom Semiconductor’s PI3C32X384, is a 2.5V or 3.3Volt,
highbandwidth 20-bit, 2-port bus switches designed with a low
Onresistance allowing inputs to be connected directly to out-
puts. e bus switch creates no additional propagational delay
or additional ground bounce noise. e switches are turned ON
by the Bus Enable (BE) input signal. Four bus enable signals are
provided, one for each of the upper and lower ve bits of the two
10-bit buses.
Features
Î Near-Zero propagation delay
Î 5-ohm switches connect inputs to outputs (PI3C32X384)
Î High Bandwidth Operation (>400 MHz)
Î Permits Hot Insertion
Î 5V I/O Tolerant
Î 2.5V Supply Voltage Operation
Î Packaging (Pb-free & Green):
à 48-pin 150-mil wide plastic BQSOP (B)
Applications
Î High Bandwidth Data switching
Î Hot Docking
2.5V/3.3V, High Bandwidth, Hot Insertion
20-Bit, 2-Port, Bus Switch
Pin Description
Pin Name Description
BEX Bus Enable Input (Active LOW)
A19 - A0 Bus A
B19 - B0 Bus B
GND Ground
V
CC
Power
Truth Table
(1)
Function BEA BEB B0-B4 B5-B9
Disconnect H H Hi-Z Hi-Z
Connect L H A4-A0 Hi-Z
Connect H L Hi-Z A19-A15
Connect L L A4-A0 A19-A15
Function BEC BED B9-B5 B14-B10
Disconnect H H Hi-Z Hi-Z
Connect L H A9-A5 Hi-Z
Connect H L Hi-Z A14-A10
Connect L L A9-A5 A14-A10
Note:
1. H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Hi-Z = High Impedance
11-0008
