SN54ALS873B Datasheet | Texas Instruments

description These dual 4-bit D-type latches feature 3-state outputs designed specifically for bus driving. These devices are 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 the high-impedance state when the output-enable (OE) input is at a high logic level. The SN54ALS873B and SN54AS873A 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. SN54ALS873B, SN54AS873A . . . JT PACKAGE SN74ALS873B, SN74AS873A . . . DW OR NT PACKAGE (TOP VIEW) 1CLR 1 1OE 2 1D1 3 1D2 4 1D3 5 1D4 6 2D1 7 2D2 8 2D3 9 2D4 10 2OE 11 GND 12 24 VCC 23 1LE 22 1Q1 21 1Q2 20 1Q3 19 1Q4 18 2Q1 17 2Q2 16 2Q3 15 2Q4 14 2LE 13 2CLR SN54ALS873B, SN54AS873A . . . FK PACKAGE (TOP VIEW) 1D1 1OE 1CLR NC VC C 1LE 1Q1 4 3 2 1 28 27 26 1D2 5 25 1Q2 1D3 6 24 1Q3 1D4 7 23 1Q4 NC 8 22 NC 2D1 9 21 2Q1 2D2 10 20 2Q2 2D3 11 19 2Q3 12 13 14 15 16 17 18 2D4 2OE GND NC 2CLR 2LE 2Q4 - No internal connection FUNCTION TABLE (each latch) INPUTS OE CLR...