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PI3B16245
Ω
PI3B162245 (25Ω)
3.3V, Hot Insertion, 16-Bit, 2-Port BusSwitch
Product Description
Product Features
• Near-zero propagation delay
• 5Ω switches connect inputs to outputs
• Fast Switching Speed - 4ns max.
• Permits Hot Insertion
• Pin compatible with 74 series16245
•
Operating Vcc Range: 3.0V to 3.6V
• 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)
Pericom Semiconductor’s PI3B series of logic circuits are produced
using the Company’s advanced 0.35 micron CMOS technology.
The PI3B16245 and PI3B162245 are 3.3 volt, hot-insertion, 16-bit,
2-port bus switches that are pin compatible with the 74 series 16245
16-bit transceiver. Two enable signals (nBE) turn the switches on
similar to the enable signals of the 16245. The bus switches create
no additional propagational delay or additional ground bounce
noise.
The PI3B162245 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
1
A
0
1
B
0
Product Pin Configuration
NC
1
B
0
1
B
1
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
1
BE
1
A
0
1
A
1
GND
1
A
7
1
B
7
1
B
2
1
B
3
GND
1
A
2
1
A
3
1
BE
V
CC
1
B
4
1
B
5
GND
1
B
6
1
B
7
V
CC
1
A
4
1
A
5
GND
1
A
6
1
A
7
2
A
0
2
A
1
2
A
0
2
B
0
2
B
0
2
B
1
48-Pin
37
A, V
36
35
34
33
32
31
30
29
28
27
26
25
GND
2
B
2
GND
2
A
2
2
A
3
2
A
7
2
B
7
2
B
3
V
CC
2
B
4
2
BE
2
B
5
V
CC
2
A
4
2
A
5
GND
2
B
6
2
B
7
NC
GND
2
A
6
2
A
7
2
BE
Truth Table
(1)
Function
Disconnect
Connect
nBE
H
L
nA
0–7
Hi-Z
nB
0–7
Product Pin Description
Pin Name
nBE
nA
0
-nA
7
nB
0
-nB
7
I/O
I
I/O
I/O
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
1
PS8189C
09/13/99
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
