74F657 Datasheet, PDF (1/7 Pages) NXP Semiconductors – Octal transceiver with 8-bit parit generator/checker

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:
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
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation DS009584
www.fairchildsemi.com