PI3B32X384
3.3V, 20-Bit, 2-Port NanoSwitch™
Features
Description
•
•
•
•
Pericom Semiconductor’s PI3B32X384 is a 3.3V, 20-bit bus
switch designed with a low On-Resistance 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. Four bus enable
signals are provided, one for each of the upper and lower five bits
of the two 10-bit buses.
Near-Zero propagation delay
5-ohm switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra-low quiescent power (0.1µA typical)
– Ideally suited for notebook applications
• Fast Switching Speed: 4.5ns max.
• TTL-compatible control of input levels
• Packaging (pb-free & Green available):
– 48-pin 150-mil wide plastic BQSOP (B)
Block Diagram
A0
Pin Configuration
B0
SW
A4
A5
B5
SW
B4
SW
A9
A10
SW
B10
A14
SW
B14
A15
SW
B15
A19
SW
B19
B9
SW
SW
A
B
OE
BEA
BEB
BEC
BED
Truth Table(1)
BEA
B0
A0
A1
B1
B2
A2
A3
B3
B4
A4
GND
BEC
B5
A5
A6
B6
B7
A7
A8
B8
B9
A9
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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
B19
A19
A18
B18
B17
A17
A16
B16
B15
A15
BEB
VCC
B14
A14
A13
B13
B12
A12
A11
B11
B10
A10
BED
Function
BEA
BEB
B4-B0
B19-B15
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
Pin Name
Description
Function
BEC
BED
B9-B5
B14-B10
BEx
Bus Enable Inputs (Active LOW)
Disconnect
H
H
Hi-Z
Hi-Z
A19-A0
Bus A
Connect
L
H
A9-A5
Hi-Z
B19-B0
Bus B
Connect
H
L
Hi-Z
A14-A10
GND
Ground
Connect
L
L
A9-A5
A14-A10
Vcc
Power
Note: 1. H = High Voltage Level
Hi-Z = High Impedance
06-0312
Pin Description
L = Low Voltage level
1
PS8336F
12/04/06
