1

PS2021B

06/20/01

Fast CMOS Octal Bus Transceiver (3-State)

Inputs

GBA

GAB

Outputs

L

L

B Data to A Bus

H

H

A Data to B Bus

HL

Z

L

H

B Data to A Bus

A Data to B Bus

Pin Name

Description

GBA,GAB

Enable Outputs

A Bus Inputs or 3-State Outputs

B Bus Inputs or 3-State Outputs

GND

Ground

Power

Product Pin Description

ProductPinConfiguration

1.

H = High Voltage Level

L = Low Voltage Level

Z = High Impedance (OFF) State

Logic Block Diagram

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PI74FCT623T

Product Features

• PI74FCT623T is pin compatible with bipolar FAST™ Series at

a higher speed and lower power consumption

• TTL input and output levels

• Extremely low static power

• Hysteresis on all inputs

• Industrial operating temperature range: –40°C to +85°C

• 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 150 mil wide plastic TQSOP (R)

– 20-pin 300 mil wide plastic SOIC (S)

Product Description

Pericom Semiconductor’s PI74FCT series of logic circuits are

produced in the Company’s advanced 0.6/0.8 micron CMOS

technology, achieving industry leading speed grades.

The PI74FCT623T is an 8-bit wide non-inverting octal transceiver

designed with 3-state bus-driving outputs in both the send and

receive directions. Designed for asynchronous two-way operation

between data buses, the control function allows for maximum

flexibility in timing.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

GAB

GND

Vcc

GBA

20-Pin

L, P,

Q, R,

S