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PI3B16212
PI3B162212 (25 Ohms)
3.3V, 24-Bit Bus Exchange Switch
Product Features
聲 Near-zero propagation delay
聲 5-ohm switches connect inputs to outputs
聲 Direct bus connection when switches are ON
聲 Fast Switching Speed: 5ns (max.)
聲 V
CC
Operating Range: 3.0V to 3.6V
聲 Industrial operating temperature: 聳40擄C to +85擄C
聲 Packages available:
聳 56-pin 240-mil wide thin plastic TSSOP (A)
聳 56-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor聮s PI3B series of logic circuits are produced
using the Company聮s advanced submicron CMOS technology.
The PI3B16212 and PI3B162212 are 3.3 volt, 24-bit bus exchange
switches designed with 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 reflection noise, thus eliminating the need for an external
terminating resistor.
Logic Block Diagram
ONE OF TWELVE CHANNELS
1A1
1B1
Product Pin Configuration
S0
1A1
1A2
2A1
2A2
3A1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
S1
S2
1B1
1B2
2B1
2B2
3B1
GND
3B2
4B1
4B2
5B1
5B2
6B1
6B2
7B1
7B2
8B1
GND
8B2
9B1
9B2
10B1
10B2
11B1
11B2
12B1
12B2
1A2
1B2
3A2
GND
4A1
4A2
5A1
FLOW CONTROL
S0
S1
S2
5A2
6A1
6A2
7A1
7A2
56-Pin
A, V
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
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
VCC
8A1
GND
8A2
9A1
9A2
10A1
10A2
11A1
11A2
12A1
12A2
Product Pin Description
Pin Name
S0- S2
xAx
xBx
1
Note:
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
I/O
I
I/O
I/O
Bus A
Bus B
De s cription
Select Inputs
PS8180A
08/21/01
1
2
3
4
