1

PS8149F

08/25/04

B

A

BE

SW

SW

SW

SW

SW

SW

SW

SW

SW

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

BE1

1

2

1

2

1

2

1

2

GND

Vcc

1

2

1

2

1

2

1

2

Description

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 3.3V 8-bit bus switches, which is

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.

Note:

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

Block Diagram

PinDescription

PinName

Description

BEn

Bus Enable Input (Active LOW)

Bus A

Bus B

GND

Ground

Power

PinConfiguration

PI3B3244

3.3V, Hot Insertion,

8-Bit, 2-Port NanoSwitch™

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Features

• Near-Zero propagation delay

• 5-ohm switches connect inputs to outputs when enabled

• Fast Switching Speed - 4.5ns max.

• Ultra-Low Quiescent Power (0.2µA Typical)

– Ideally suited for notebook applications

• Pin compatible with 74 series 244 logic devices

• Packaging:

– 20-pin 150-mil wide plastic QSOP (Q)

– 20-pin 173-mil wide plastic TSSOP (L)

20-Pin

Q,L

1

E

B2

E

BB

1

,

A

1B

2

,

A

2

HH

t

c

e

n

n

o

c

s

i

Dt

c

e

n

n

o

c

s

i

D

LH

B

1

=

A

1t

c

e

n

n

o

c

s

i

D

HL

t

c

e

n

n

o

c

s

i

DB

2

=

A

2

LL

B

1

=

A

1B

2

=

A

2