SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880
DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS

SDAS079A - D2661, DECEMBER 1982 - REVISED MAY 1986

features

• 3-State Buffer-Type Outputs Drive Bus Lines Directly
• Bus-Structured Pinout
• 'ALS873B is Alternative Version With Noninverting Outputs
• 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 latches are transparent D-type. When the latch enable input (1C or 2C) is high, the Q\ outputs will follow the data (D) inputs in inverted form, according to the function table. When the latch enable input is taken low, the outputs will be latched. When goes low, the Q\ outputs go low independently of the clock. The outputs are in a high-impedance state when (output control) is at a high logic level.

The SN54ALS880A and SN54AS880 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS880A and SN74AS880 are characterized for operation from 0°C to 70°C.