SN74AS874 Dual 4-Bit D-Type Edge-Triggered Flip-Flops |

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Dual 4-Bit D-Type Edge-Triggered Flip-Flops

Dual 4-Bit D-Type Edge-Triggered Flip-Flops - SN74AS874


These dual 4-bit D-type edge-triggered flip-flops feature 3-state outputs designed specifically as bus drivers. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The edge-triggered flip-flops enter data on the low-to-high transition of the clock (CLK) input. The SN54ALS874B, SN74ALS874B, and SN74AS874 have clear () inputs and noninverting Q outputs. The SN74ALS876A and SN74AS876 have preset () inputs and inverting Q\ outputs; taking low causes the four Q or Q\ outputs to go low independently of the clock.

The SN54ALS874B is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS874B, SN74ALS876A, SN74AS874, and SN74AS876 devices are characterized for operation from 0°C to 70°C.


  • 3-State Buffer-Type Outputs Drive Bus Lines Directly
  • Bus-Structured Pinout
  • Choice of True or Inverting Logic
    • SN54ALS874B, SN74ALS874B, SN74AS874 Have True Outputs
    • SN74ALS876A, SN74AS876 Have Inverting Outputs
  • Asynchronous Clear
  • Package Options Include Plastic Small-Outline (DW) Packages, Plastic (FN) and Ceramic (FK) Chip Carriers, and Standard Plastic (NT) and Ceramic (JT) 300-mil 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
SN74AS874 Order now AS     TTL     TTL     4.5     5.5     48     -15     Catalog     SOIC | 24