PI5C32X383/PI5C32X2383
20-Bit Bus Switch/Exchange
Product Features
Near-zero propagation delay
Product Description
PericomSemiconductorsPI5Cseriesoflogiccircuitsarepro-duced
in the Companys advanced submicron CMOS technology,
achieving industry leading performance.
Lownoise,25ohmversion(PI5C32X2383)
5 ohm switches connect inputs to outputs (PI5C32X383)
Direct bus connection when switches are ON
The PI5C32X383 and PI5C32X2383 are 20-bit bus switches with
exchange designed with a low ON resistance allowing inputs to be
connected directly to outputs. The bus switch creates no additional
propagationaldelayoradditionalgroundbouncenoise.Theswitches
are turned ON by the Bus Enable (BE) input signal, and the Bus
Exchange (BX) input signal offers nibble swapping of the AB and
CD pairs of signals. This exchange configuration allows byte
swapping of buses in systems. It can also be used as a quad
2-to-1 multiplexer and to create low delay barrel shifters, etc. The
PI5C32X2383isdesignedwithaninternal25ohmresistorreducing
noise reflection in high-speed applications.
Ultra-lowquiescentpower(0.2µAtypical)
Ideally suited for notebook applications
Packagesavailable:
48-pin240-milwidethinplasticTSSOP(A)
48-pin150-milwideplasticQSOP(B)
Product Pin Configuration
48
47
46
45
44
43
42
41
40
39
38
37
BE1
C0
A0
B0
D0
C1
A1
B1
D1
1
2
3
4
5
6
7
8
9
VCC
D4
B4
Applications
10-wide 2:1 MUX, Byte Swapping, and Hot Insertion.
A4
C4
D3
B3
Truth Table(1)
Function
Disconnect
Connect
BEN
H
BXn
X
A0-A9
Hi-Z
B0-B9
Hi-Z
A3
C3
D2
B2
C2 10
A2 11
GND 12
BE2 13
C5 14
A5 15
B5 16
D5 17
C6 18
A6 19
B6 20
D6 21
C7 22
A7 23
GND 24
L
L
C0-C9
D0-D9
D0-D9
C0-C9
48-Pin
Exchange
L
H
BX1
Note: 1. H = High Voltage Level, X = Dont Care,
L = Low Voltage Level, Hi-Z = High Impedance
36 VCC
35 D9
34 B9
33 A9
32 C9
31 D8
30 B8
Logic Block Diagram
A5
B5
C5
D5
A0
C0
D0
A8
29
28
27
26
25
C8
D7
B7
B0
BX2
A9
B9
C9
D9
A4
B4
C4
D4
Product Pin Description
Pin Name
BEn
BXn
Ax
Description
Bus Enable Input (Active LOW)
Bus Exchange Input
Bus A
Bx
Bus B
BX1
Cx
Bus C
BE1
BX2
Dx
Bus D
GND
VCC
Ground
BE2
Power
PS8100
07/10/97
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