PI3C3244 Datasheet, PDF (1/4 Pages) Pericom Semiconductor Corporation – 2.5V/3.3V, High Bandwidth, Hot Insertion, 8-Bit, 2-Port Bus Switch

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Product Features
• Near zero propagation delay
• High Bandwidth (>400 MHz)
• Rail-to-Rail3.3Vor2.5VSwitching
• 5V I/O Tolerant
• 2.5V Supply Voltage Operation
• Permits Hot Insertion
• Pin compatible with 74 series 244 logic devices
• Packages available:
– 20-pin 150 mil wide plastic QSOP (Q)
2.5V/3.3V, High Bandwidth, Hot Insertion,
8-Bit, 2-Port Bus Switch
Product Description
Pericom Semiconductor’s PI3C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
The PI3C3244 features a set of 2.5V or 3.3V 8-bit bus switches,
which is a pinout and function compatible with the P74FCT244T,
74F244, and 74ALS/AS/LS2448-bit drivers. Two enable signals
(BEn) turn the switches on similar to the enable signals of the 244.
The bus switch create no additional propagation delay or ground
bounce noise. It is very useful in switching signals that have high
bandwidth (>400 MHz).
– 20-pin 173 mil wide plastic TSSOP (L)
Logic Block Diagram
Product Pin Configuration
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BE1 1
20 VCC
1A0 2
19 BE2
2B3 3
18 1B0
1A1 4 _20-Pin 17 2A3
2B2 5 _L,Q 16 1B1
1A2 6
15 2A2
2B1 7
14 1B2
1A3 8
13 2A1
2B0 9
12 1B3
GND 10
11 2A0
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Product Pin Description
Pin Name
Description
BEn
Bus Enable Input (Active LOW)
A0–7
Bus A
B0–7
Bus B
GND
Ground
V_CC
Power
Truth Table⁽¹⁾
BE1
BE2
H
H
L
H
H
L
L
L
Note:
1. H = High Voltage Level
L = Low Voltage Level
1A, 1B
Disconnect
1A = 1B
Disconnect
1A = 1B
2A, 2B
Disconnect
Disconnect
2A = 2B
2A = 2B
1
PS8149B 12/10/99