54ACT16823, 74ACT16823 18-BIT BUS-INTERFACE FLIP-FLOPS WITH 3-STATE OUTPUTS

SCAS160A - APRIL 1991 - REVISED APRIL 1996

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features

Members of the Texas Instruments Widebus^TM Family
Inputs Are TTL-Voltage Compatible
Provide 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
Package Options Include Plastic 300-mil Shrink Small-Outline (DL) Packages Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Packages 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 'ACT16823 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.

A buffered output-enable () input can be used to place the outputs in either anormal logic state (high or low logic levels) or a high-impedancestate. In the high-impedance state, the outputs neither load nordrive the bus lines significantly.

does notaffect the internal operation of the flip-flops. Old data can beretained or new data can be entered while the outputs are in thehigh-impedance state.

The 74ACT16823 is packaged in theTI shrink small-outline package,which provides twice the I/O pin count and functionality of standardsmall-outline packages in the same printed-circuit-board area.

The 54ACT16823 is characterized for operation over the fullmilitary temperature range of 55°C to 125°C. The 74ACT16823is 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: 74ACT16823DL, 74ACT16823DLR

View the complete PDF datasheet: scas160a.pdf (129 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:74ACT16823

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