SN54ALS873B, SN54AS873, SN74ALS873B, SN74AS873A DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS

SDAS036C - APRIL 1982 - REVISED SEPTEMBER 1994

features

• 3-State Buffer-Type Outputs Drive Bus Lines Directly
• Bus-Structured Pinout
• Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Plastic (NT) and Ceramic (JT) DIPs

description

These dual 4-bit D-type latches 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 latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs in true form, according to the function table. When LE is low, the outputs are latched. When the clear (CLR\) input goes low, the Q outputs go low independently of LE. The outputs are in a high-impedance state when the output-enable (OE\) input is at a high logic level.

The SN54ALS873B and SN54AS873 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS873B and SN74AS873A are characterized for operation from 0°C to 70°C.

View more information about generic part numbers:SN54AS873

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