CD74ACT374 Octal D-Type Flip-Flops with 3-State Outputs |

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Octal D-Type Flip-Flops with 3-State Outputs

Octal D-Type Flip-Flops with 3-State Outputs - CD74ACT374


The RCA-CD54/74AC374 and CD54/74AC534 and the CD54/74ACT374 and CD54/74ACT534 octal D-type, 3-state, positive-edge triggered flip-flops use the RCA ADVANCED CMOS technology. The eight flip-flops enter data into their registers on the LOW-to-HIGH transition of the clock (CP). The Output Enable (OE\) controls the 3-state outputs and is independent of the register operation. When the Output Enable (OE\) is HIGH, the outputs are in the high-impendance state. The CD54/74AC/ACT374 and CD54/74AC/ACT534 share the same pin configurations, but the CD54/74AC/ACT374 outputs are non-inverted while the CD54/74AC/ACT534 devices have inverted outputs. (For flow-through pin configurations, see CD54/74AC/ACT564 and CD54/74AC/ACT574.)

The CD74AC/ACT374 and CD74AC/ACT534 are supplied in 20-lead dual-in-line plastic packages (E suffix) and in 20-lead dual-in-line small-outline plastic packages (M suffix). Both package types are operable over the following temperature range: Commerical (0 to 70°C); Industrial (-40 to +85°C); and Extended Industrial/Military (-55 to +125°C).

The CD54AC/ACT374 and CD54AC/ACT534, available in chip form (H suffix), are operable over the -55 to +125°C temperature range.


  • Buffered inputs
  • Typical propagation delay:
    5 ns @ VCC = 5 V, TA = 25°C, CL = 50 pF
  • Exceeds 2-kV ESD Protection - MIL-STD-883, Method 3015
  • SCR-Latch-up-resistant CMOS process and circuit design
  • Speed of bipolar FAST*/AS/S with significantly reduced power consumption
  • Balanced propagation delays
  • AC types feature 1.5-V to 5.5-V operation and balanced noise immunity at 30% of the supply
  • ± 24-mA output drive current
    -Fanout to 15 FAST* ICs
    -Drives 50-ohm transmission lines
  • Characterized for operation from –40° to 85°C

*FAST is a Registered Trademark of Fairchild Semiconductor Corp.


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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
CD74ACT374 Order now ACT     TTL     CMOS     4.5     5.5     24     -24     Catalog     PDIP | 20
SOIC | 20    
CD54ACT374 Samples not available ACT     TTL     CMOS     4.5     5.5     24     -24     Military     CDIP | 20