21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16244/162244
16-BIT BUS SWITCH BUFFER
PI5C16244
PI5C162244 (25Ω)
Ω
Product Features:
• Near-zero propagation delay
• 5Ω 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
16-Bit BusSwitch
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.
• 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)
Logic Block Diagram
1
BE
3
BE
Product Pin Configuration
1
BE
1
B
0
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
2
BE
1
A
0
1
A
1
1A
0
1A
1
1A
2
1A
3
1B
0
1B
1
1B
2
1B
3
3A
0
3A
1
3A
2
3A
3
3B
0
3B
1
3B
2
3B
3
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
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
2
BE
4
BE
10
39
48-PIN
11
A,V,B
38
12
37
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
31
30
29
28
27
26
25
2A
0
2A
1
2A
2
2A
3
2B
0
2B
1
2B
2
2B
3
4A
0
4A
1
4A
2
4A
3
4B
0
4B
1
4B
2
4B
3
3
B
0
3
B
1
GND
3
B
2
3
B
3
V
CC
4
B
0
4
B
1
GND
3
A
2
3
A
3
V
CC
4
A
0
4
A
1
GND
GND
4
A
2
4
A
3
3
BE
Truth Table
(1)
Function
Disconnect
Connect
nBE
H
L
nA
0–7
Hi-Z
nB
0–7
4
B
2
4
B
3
4
BE
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Product Pin Description
Pin Name
nBE
nA
0
-nA
7
nB
0
-nB
7
I/O
I
I/O
I/O
Description
Bus Output Enable
(Active LOW)
Bus A
Bus B
122
PS7024B 09/17/96
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
