SN74ALS873B Dual 4-Bit D-Type Latches With 3-State Outputs |

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Dual 4-Bit D-Type Latches With 3-State Outputs

Dual 4-Bit D-Type Latches With 3-State Outputs - SN74ALS873B


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 () input goes low, the Q outputs go low independently of LE. The outputs are in the high-impedance state when the output-enable () 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.




  • 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



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Part number Order Technology Family Input type Output type VCC (Min) (V) VCC (Max) (V) IOL (Max) (mA) IOH (Max) (mA) Rating Package Group
SN74ALS873B Order now ALS     TTL     TTL     4.5     5.5     24     2.6     Catalog     SOIC | 24    
SN54ALS873B Samples not available ALS     TTL     TTL     4.5     5.5     24     -2.6     Military     CDIP | 24
LCCC | 28