PI3B16861/PI3B162861
3.3V, Hot Insertion, 20-Bit, 2-PPorIt3BBus1S6w8it6c1h
PI3B162861 (25Ω)
3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch
Product Features
Product Description
• Near-zero propagation delay
Pericom Semiconductor’s PI3B series of Bus Switch circuits are
produced in the Company’s advanced 0.35 micron CMOS
technology, achieving industry leading speed.
• 5Ω or 25Ω switches connect inputs to outputs
• Fast Switching Speed - 5ns (max.)
• Direct bus connection when switches are ON
• Permits Hot Insertion
The PI3B16861 is configured as a 3.3 volt, hot insertion, 20-bit,
2-port bus switch designed with a low ON resistance (5Ω)
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.
• 32X384 function with flow through pinout make board
layout easier
• Vcc Operating Range: 3.0V to 3.6V
• Industrial operating temperature: –40°C to +85°C
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.
• Packages available:
– 48-pin 240-mil wide plastic TSSOP (A)
– 48-pin 300-mil wide plastic SSOP (V)
– 48-pin 150-mil wide plastic BQSOP (B)
Product Pin Configuration
Logic Block Diagram
NC
1
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
A
A
0
B
0
9
A
A
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
8
9
2
1
3
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
4
5
9
1
B
6
7
8
BE
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
A
10
19
B
10
19
GND
NC
VCC
BE
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
2
B
B
B
B
B
B
B
B
B
B
10
A
B
11
12
13
14
15
16
17
18
19
BE
2
Truth Table(1)
Function
BEX A19-A0
GND
Disconnect
Connect
H
L
Hi-Z
B19-B0
Product Pin Description
Note:
Pin Name
Description
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
BEx
Bus Enable Inputs (Active LOW)
Bus A
Bus B
A19-A0
B19-B0
PS8175B
11/06/98
1