PERIC PI3B3244L, PI3B3244Q Datasheet

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PI3B3244

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ProductFeatures

Near zero propagation delay

5 Ohm switches connect inputs to outputs when enabled

Fast Switching Speed - 4.5ns max.

Permits Hot Insertion

Ultra Low Quiescent Power (0.2µA Typical)

Ideally suited for notebook applications

Pin compatible with 74 series 244 logic devices

Packages available:

20-pin 150 mil wide plastic QSOP (Q)

20-pin 173 mil wide plastic TSSOP (L)

3.3V, Hot Insertion,

8-Bit, 2-Port BusSwitch

ProductDescription

Pericom Semiconductor’s PI3B series of logic circuits are produced using the Company’s advanced sub micron CMOS technology, achieving industry leading performance.

The PI3B3244 features a set of 3.3.V 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.

Logic Block Diagram

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BE1

 

 

 

 

 

 

 

 

1A0

 

1B0

 

 

 

 

 

1A1

 

1B1

 

 

 

 

 

1A2

 

1B0

 

 

 

 

 

1A3

 

1B1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BE2

 

 

 

 

 

 

 

 

2A0

 

2B0

 

 

 

 

 

2A1

 

2B1

 

 

 

 

 

2A2

 

2B2

 

 

 

 

 

2A3

 

2B3

 

 

 

 

 

 

 

 

 

 

 

 

 

Truth Table(1)

 

 

 

 

 

 

 

 

 

 

 

1A, 1B

2A, 2B

 

BE1

 

 

BE2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

H

Disconnect

Disconnect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

H

1A = 1B

Disconnect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

L

Disconnect

2A = 2B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

L

1A = 1B

2A = 2B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note:

1. H = High Voltage Level, L = Low Voltage Level

Product Pin Configuration

 

 

 

 

 

 

 

 

 

BE1

 

1

 

 

 

20

 

VCC

 

 

 

 

 

1A0

 

2

 

 

 

19

 

BE2

 

 

 

 

 

2B3

 

3

 

 

 

18

 

1B0

 

 

 

 

 

1A1

 

4

20-Pin

17

 

2A3

 

 

 

 

2B2

 

5

Q,L

16

 

1B1

 

 

1A2

 

6

 

 

 

15

 

2A2

 

 

 

 

 

2B1

 

7

 

 

 

14

 

1B2

 

 

 

 

 

1A3

 

8

 

 

 

13

 

2A1

 

 

 

 

 

2B0

 

9

 

 

 

12

 

1B3

 

 

 

 

 

GND

 

10

 

 

 

11

 

2A0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Product Pin Description

 

PinName

Description

 

 

 

 

 

 

 

Bus Enable Input (Active LOW)

 

BEn

 

A07

Bus A

 

 

 

 

 

B07

Bus B

 

 

 

 

 

GND

Ground

 

 

 

 

 

VCC

Power

1

PS8149D

01/05/00

 

 

+ 2 hidden pages