SN54ALS878A, SN54ALS879A, SN54AS878, SN54AS879
SN74ALS878A, SN74ALS879A, SN74AS878, SN74AS879
DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS

SDAS062A - D2661, APRIL 1982 - REVISED MAY 1986

features

• 3-State Bus Driving Outputs
• Full Parallel-Access for Loading
• Buffered Control Inputs
• Choice of True or Inverting Logic
  • 'ALS878A, 'AS878 True Outputs
  • 'ALS879A, 'AS879 Inverting Outputs
• Synchronous Clear
• Package Options Include Plastic Small Outline Packages, Both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs
• Dependable Texas Instruments Quality and Reliability

description

These dual 4-bit registers feature 3-state outputs designed specifically for bus driving. This makes these devices particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The dual 4-bit edge-triggered flip-flops enter data on the low-to-high transition of the clock (1CLK and 2CLK). All types have individual synchronous clear inputs and output control pins for each group of 4-bit registers.

The SN54ALS' and SN54AS' devices are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS' and SN74AS' devices are characterized for operation from 0°C to 70°C.