PI5C16244/162244
PI5C162244 (25
)
16-BIT BUS SWITCH BUFFER
122
PS7024B 09/17/96
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Product Features:
Near-zero propagation delay
5
switches connect inputs to outputs when enabled
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2 μA typical)
– Ideally suited for notebook applications
Pin compatible with 74 series16244
Industrial operating temperature: –40°C to +85°C
Packages available:
– 48-pin 240 mil wide thin plastic TSSOP (A)
– 48-pin 300 mil wide plastic SSOP (V)
– 48-pin 150 mil wide plastic BQSOP (B)
Product Description:
Pericom Semiconductor’s PI5C series of logic circuits are pro-
duced in the Company’s advanced 0.6 micron CMOS technology.
The PI5C16244 and PI5C162244 are 16-bit, 4-port bus switches
that are pin compatible with the 74 series 16244 16-bit driver. Four
enable signals (nBE) turn the switches on similar to the enable
signals of the 16244. The bus switch creates no additional propagation
delay or ground bounce noise.
The PI5C162244 device has a built-in 25-ohm series resistor to
reduce noise because of reflections, thus eliminating the need for an
external terminating resistor.
16-Bit BusSwitch
Logic Block Diagram
Product Pin Description
Pin Name
I/O
nBE
Function
Disconnect
Connect
nBE
H
L
nA
0–7
Hi-Z
nB
0–7
Truth Table
(1)
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Description
Bus Output Enable
(Active LOW)
Bus A
Bus B
I
nA
0
-nA
7
nB
0
-nB
7
I/O
I/O
Product Pin Configuration
1B
0
1A
0
1B
1
1A
1
1B
2
1A
2
1B
3
1A
3
1
BE
2B
0
2A
0
2B
1
2A
1
2B
2
2A
2
2B
3
2A
3
2
BE
3B
0
3A
0
3B
1
3A
1
3B
2
3A
2
3B
3
3A
3
3
BE
4B
0
4A
0
4B
1
4A
1
4B
2
4A
2
4B
3
4A
3
4
BE
1
BE
1
B
0
1
B
1
GND
1
B
2
1
B
3
V
CC
2
B
0
2
B
1
GND
2
B
2
2
B
3
3
B
0
3
B
1
GND
3
B
2
3
B
3
V
CC
4
B
0
4
B
1
GND
4
B
2
4
B
3
4
BE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
2
BE
1
A
0
1
A
1
GND
1
A
2
1
A
3
V
CC
2
A
0
2
A
1
GND
2
A
2
2
A
3
3
A
0
3
A
1
GND
3
A
2
3
A
3
V
CC
4
A
0
4
A
1
GND
4
A
2
4
A
3
3
BE
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
48-PIN
A,V,B