PI5C3244 Ver la hoja de datos (PDF) - Pericom Semiconductor Corporation
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PI5C3244 Datasheet PDF : 3 Pages
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PI5C3244
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8-Bit, 2-Port BusSwitch
Product Features:
• Near zero propagation delay
• 5Ωswitches connect inputs to outputs when enabled
• Direct bus connection when switches are ON
• Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• Pin compatible with 74 Series 244 logic devices
• Packages available:
– 20-pin 173 mil wide plastic TSSOP (L)
– 20-pin 300 mil wide plastic DIP (P)
– 20-pin 150 mil wide plastic QSOP (Q)
– 20-pin 300 +mil wide plastic SOIC (S)
Product Description:
Pericom Semiconductor’s PI5C series of logic circuits are pro-
duced in the Company’s advanced 0.8 micron CMOS technology,
achieving industry leading performance.
The PI5C3244 features a set of eight bus switches which is pinout
and function compatible with the PI74FCT244T, 74F244, and
74ALS/AS/LS 244 8-bit drivers. Two enable signals (BEn) turn the
switches on similar to the enable signals of the 244. The bus switch
creates no additional propagation delay or ground bounce noise.
Logic Block Diagram
BE1
1A0
1B0
1A1
1B1
1A2
1B2
1A3
1B3
BE2
2A0
2B0
2A1
2B1
2A2
2B2
2A3
2B3
Truth Table(1)
BE1
BE2
H
H
L
H
H
L
L
L
1A, 1B
Disconnect
1A = 1B
Disconnect
1A = 1B
2A, 2B
Disconnect
Disconnect
2A = 2B
2A = 2B
Note: 1. H = High Voltage Level
L = Low Voltage Level
Product Pin Configuration
BE1
1A0
2B3
1A1
2B2
1A2
2B1
1A3
2B0
GND
1
20
2
19
3
18
4 20-PIN 17
5
L20
P20
16
6 Q20 15
7 S20 14
8
13
9
12
10
11
VCC
BE2
1B0
2A3
1B1
2A2
1B2
2A1
1B3
2A0
Product Pin Description
Pin Name
BEn
A0-A3
B0-B3
GND
VCC
Description
Bus Output Enable (Active LOW)
Bus A
Bus B
Ground
Power
140
PS7014A 03/13/96
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