© 1999 Fairchild Semiconductor Corporation

DS009584

www.fairchildsemi.com

March 1988

Revised August 1999

74F657

Octal Bidirectional Transceiver with

8-Bit Parity Generator/Checker and 3-STATE Outputs

General Description

The 74F657 contains eight non-inverting buffers with 3-

STATE outputs and an 8-bit parity generator/checker. It is

intended for bus-oriented applications. The buffers have a

guaranteed current sinking capability of 24 mA at the A

Port and 64 mA at the B Port.

Features

s 300 Mil 24-pin slimline DIP

s Combines 74F245 and 74F280A functions in one

package

s 3-STATE outputs

s B Outputs sink 64 mA

s 12 mA source current, B side

s Input diodes for termination effects

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbols

IEEE/IEC

Connection Diagram

Order Number

Package Number

Package Description

75F657SC

M24B

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

74F657SPC

N24C

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide