74ABT16646 Datasheet | NXP Semiconductors

INTEGRATED CIRCUITS 74ABT16646 74ABTH16646 16-bit bus transceiver/register (3-State) Product specification Supersedes data of 1995 Aug 17 IC23 Data Handbook 1998 Feb 27 Philips Semiconductors Philips Semiconductors Product specification 16-bit bus transceiver/register (3-State) 74ABT16646 74ABTH16646 Features - Independent registers for A and B buses - Multiple VCC and GND pins minimize switching noise - Live insertion/extraction permitted - Power- up 3-State - Power- up reset - Multiplexed real-time and stored data - Outputs sink 64m A and source 32m A - Latch- up protection exceeds 500m A per JEDEC Std 17 - 74ABTH16646 incorporates bus-hold data inputs which eliminate the need for external pull-up resistors to hold unused inputs DESCRIPTION The 74ABT16646 high- performance Bi CMOS device bines low static and dynamic power dissipation with high speed and high output drive. The 74ABT16646 16-bit transceiver/register consists of two sets of bus transceiver circuits with 3-State outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes High. Output Enable (n OE) and Direction (n DIR) pins are provided to control the transceiver function. In the transceiver mode, data present at the high impedance port may be stored in either the A or B register or both. The select (n SAB, n SBA) pins determine whether data is stored or transferred through the device in real-time. The n DIR determines which bus will receive data when the n OE is active Low. In the isolation mode (n OE = High), data from Bus A may be stored in the B register and/or data from Bus B may be stored in the A register. When an output function is disabled, the input function is still enabled and may be used to store and transmit data. Only one of the two buses, A or B may be driven at a time. Two options are available,...