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3.3V, 24-Bit Bus Exchange Switch
Product Features
鈥?Near-zero propagation delay
鈥?5鈩?switches connect inputs to outputs
鈥?Direct bus connection when switches are ON
鈥?Fast Switching Speed - 5ns (max.)
鈥?V
CC
Operating Range: 3.0V to 3.6V
鈥?Industrial operating temperature: 鈥?0擄C to +85擄C
鈥?Packages available:
鈥?56-pin 240-mil wide thin plastic TSSOP (A)
鈥?56-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor鈥檚 PI3B series of logic circuits are produced
in the Company鈥檚 advanced 0.35 micron CMOS technology.
The PI3B16212 and PI3B162212 are 3.3 volt, 24-bit bus exchange
switches designed with a low ON resistance allowing inputs to be
connected directly to outputs. The devices operate as a 24-bit bus
switch or as a 12-bit exchanger, providing data exchange between
the four signal ports via the data select pins (S0-S2).
The PI3B162212 device has a built-in 25-ohm series resistor to
reduce noise due to reflections, thus eliminating the need for an
external terminating resistor.
Logic Block Diagram
ONE OF TWELVE CHANNELS
1
A
1
1
B
1
Product Pin Configuration
S
0
1
A
1
1
A
2
2
A
1
2
A
2
3
A
1
3
A
2
GND
4
A
1
4
A
2
5
A
1
5
A
2
6
A
1
6
A
2
7
A
1
7
A
2
1
2
3
4
5
6
7
56
55
54
53
52
51
50
49
S
1
S
2
1
B
1
1
B
2
2
B
1
2
B
2
3
B
1
1
A
2
1
B
2
FLOW CONTROL
S
0
S
1
S
2
8
9
56-PIN
48
10
A, V
47
46
11
45
12
44
13
43
14
42
15
16
17
18
19
20
21
22
23
24
25
26
27
28
41
40
39
38
37
36
35
34
33
32
31
30
29
GND
3
B
2
4
B
1
4
B
2
5
B
1
5
B
2
6
B
1
6
B
2
7
B
1
7
B
2
8
B
1
Truth Table
Function
Disconnect
A1 to B1
A1 to B2
A2 to B1
A2 to B2
Disconnect
A1 to B1, A2 to B2
A1 to B2, A2 to B1
S2
L
L
L
L
H
H
H
H
S1
L
L
H
H
L
L
H
H
S0
L
H
L
H
L
H
L
H
A1
Z
B1
B2
Z
Z
Z
B1
B2
A2
Z
Z
Z
B1
B2
Z
B2
B1
V
CC
8
A
1
GND
8
A
2
9
A
1
9
A
2
10
A
1
10
A
2
11
A
1
11
A
2
12
A
1
12
A
2
GND
8
B
2
9
B
1
9
B
2
10
B
1
10
B
2
11
B
1
11
B
2
12
B
1
12
B
2
Product Pin Description
Pin Name
S0-S2
xAx
xB
x
1
Note:
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
I/O
I
I/O
I/O
Description
Select Inputs
Bus A
Bus B
PS8180A
11/09/98
1
2
3
4
