PI5C16861
PI5C162861 (25Ω)
20-Bit, 2-Port Bus Switch
Features
• Near-Zero propagation delay
• 5Ω or 25Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• 32X384 function with flow through pinout make board layout
easier
• Ultra-low quiescent power (0.2 µA typical) – ideally suited
for notebook applications
• Industrial operating temperature: –40°C to +85°C
• Packaging (Pb-free & Green 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)
Description
Pericom Semiconductor’s PI5C16861 is configured as a 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
switches are turned ON by the Bus Enable (BEx) input signal.
The PI5C162861 device has a built-in 25Ω series resistor to reduce
noise resulting from reflections, thus eliminating the need for an
external terminating resistor.
Pin Configuration
NC
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
GND
NC
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
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
BE1
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
VCC
BE2
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
Block Diagram
A0
B0
A9
B9
BE1
A10
B10
A19
B19
BE2
Truth Table
(1)
Function
Disconnect
Connect
BE
X
H
L
A19-A0
Hi-Z
B19-B0
Pin Description
Pin Name
BEx
A19-A0
B19-B0
Description
Bus Enable Inputs (Active LOW)
Bus A
Bus B
PS7026E
09/13/04
Note:
1. H = High Voltage Level, L = Low Voltage Level,
Hi-Z = High Impedance
1
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
