75F657SC

74F657 Octal Bidirectional Transceiver with 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 3STATE 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 75F657SC 74F657SPC Package Number M24B N24C Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 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 74F657 Unit Loading/Fan Out U.L. Pin Names A0–A7 Description HIGH/LOW Data Inputs/ 3-STATE Outputs B0–B7 Data Inputs/ 3-STATE Outputs T/R OE PARITY Transmit/Receive Input Enable Input Parity Input/ 3-STATE Output ODD/EVEN ERROR ODD/EVEN Parity Input Error Output 4.5/0.15 150/40 (33.3) 3.5/0.117 600/106.6 (80) 2.0/0.067 2.0/0.067 3.5/0.117 600/106.6 (80) 1.0/0.033 600/106.6 ...