25鈩?/div>
switches connect inputs to outputs
Fast Switching Speed - 5ns (max.)
Direct bus connection when switches are ON
Permits Hot Insertion
32X384 function with flow through pinout make board
layout easier
鈥?Vcc Operating Range: 3.0V to 3.6V
鈥?Industrial operating temperature: 鈥?0擄C to +85擄C
鈥?Packages available:
鈥?48-pin 240-mil wide plastic TSSOP (A)
鈥?48-pin 300-mil wide plastic SSOP (V)
鈥?48-pin 150-mil wide plastic BQSOP (B)
Pericom Semiconductor鈥檚 PI3B series of Bus Switch circuits are
produced in the Company鈥檚 advanced 0.35 micron CMOS
technology, achieving industry leading speed.
The PI3B16861 is configured as a 3.3 volt, hot insertion, 20-bit,
2-port bus switch designed with a low ON resistance (5鈩?
allowing inputs to be connected directly to outputs. The bus
switch creates no additional propagational delay or additional
ground bounce noise. The switch is turned ON by the Bus Enable
(BEx) input signal.
The PI3B162861 device has a built-in 25-ohm series resistor to
reduce noise resulting from reflections, thus eliminating the need
for an external terminating resistor.
Logic Block Diagram
A
0
B
0
Product Pin Configuration
NC
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
GND
NC
A
10
A
11
A
12
A
13
A
14
A
15
A
16
A
17
A
18
A
19
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
BE
1
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
VCC
BE
2
B
10
B
11
B
12
B
13
B
14
B
15
B
16
B
17
B
18
B
19
A
9
B
9
BE
1
A
10
B
10
A
19
B
19
BE
2
Truth Table
(1)
Function
Disconnect
Connect
BE
X
A
19-A0
H
Hi-Z
L
B
19-B0
Product Pin Description
Pin Name
BEx
A
19-A0
B
19-B0
1
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Description
Bus Enable Inputs (Active LOW)
Bus A
Bus B
PS8175B
11/06/98
1
2
3
