74ACT16646

74ACT16646 16-Bit Transceiver/Register with 3-STATE Outputs August 1999 Revised October 1999 74ACT16646 16-Bit Transceiver/Register with 3-STATE Outputs General Description The ACT16646 contains sixteen non-inverting bidirectional registered bus transceivers providing multiplexed transmission of data directly from the input bus or from the internal storage registers. Each byte has separate control inputs which can be shorted together for full 16-bit operation. The DIR inputs determine the direction of data flow through the device. The CPAB and CPBA inputs load data into the registers on the LOW-to-HIGH transition. Features s Independent registers for A and B buses s Multiplexed real-time and stored data transfers s Separate control logic for each byte s 16-bit version of the ACT646 s Outputs source/sink 24 mA s TTL-compatible inputs Ordering Code: Order Number 74ACT16646SSC 74ACT16646MTD Package Number MS56A MTD56 Package Description 56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300” Wide 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbol Connection Diagram FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1999 Fairchild Semiconductor Corporation DS500345 www.fairchildsemi.com 74ACT16646 Function Table Inputs G1 H H H L L L L L L L L DIR1 X X X H H H H L L L L CPAB1 CPBA1 SAB1 H or L X SBA1 X X X X ...