54AC16823, 74AC16823 18-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS

SCAS243A - APRIL 1991 - REVISED APRIL 1996

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features

Members of the Texas Instruments Widebus ^TM Family
Provides Extra Data Width Necessary for Wider Address/Data Paths or Buses With Parity
Flow-Through Architecture Optimizes PCB Layout
Distributed V_CC and GND Pin Configuration Minimizes High-Speed Switching Noise
EPIC ^TM (Enhanced-Performance Implanted CMOS) 1-m Process
500-mA Typical Latch-Up Immunity at 125°C
Package Options Include Plastic 300-mil Shrink Small-Outline (DL) Package Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Pin Spacings

EPIC and Widebus are trademarks of Texas Instruments

description

These 18-bit flip-flops feature 3-state outputs designedspecifically for driving highly capacitive or relativelylow-impedance loads. They are particularly suitable for implementingwider buffer registers, I/O ports, parity bus interfacing, andworking registers.

The 'AC16823 can be used as two 9-bit flip-flops or one 18-bitflip-flop. With the clock-enable () input low, the D-type flip-flops enter data on thelow-to-high transitions of the clock. Taking high disables the clock buffer,thus latching the outputs. Taking the clear () input low causes the Q outputs togo low independently of the clock.

The output enable input can be used to place the outputs in either a normal logic state(high or low) or a high-impedance state. In the high-impedance state,the outputs neither load nor drive the bus lines significantly.

does not affectthe internal operation of the flip-flops. Old data can be retained ornew data can be entered while the outputs are in the high-impedancestate.

The 74AC16823 is packaged in TI's shrink small-outline package(DL), which provides twice the I/O pin count and functionality ofstandard small-outline packages in the same printed-circuit-boardarea.

The 54AC16374 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. The 74AC16823is characterized for operation from -40°C to 85°C.

Title: 18-BIT BUS INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS
Product Family: D-TYPE (3-STATE) FLIP-FLOPS
Device Functionality: 18-BIT BUS-INTERFACE FLIP-FLOP
Orderable Devices: 74AC16823DL, 74AC16823DLR

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View more information about generic part numbers:74AC16823

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