SN74AHCT374 Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs |

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Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs

Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs - SN74AHCT374


The ’AHCT374 devices are octal edge-triggered D-type flip-flops that feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. This device is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels of the data (D) inputs.

A buffered output-enable (OE)\ input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components.

OE\ does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.


  • Inputs Are TTL-Voltage Compatible
  • Latch-Up Performance Exceeds 250 mA Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)


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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
SN74AHCT374 Order now AHCT     TTL     CMOS     4.5     5.5     8     -8     Catalog     PDIP | 20
SOIC | 20
SSOP | 20
TSSOP | 20    
SN54AHCT374 Samples not available AHCT     TTL     CMOS     4.5     5.5     8     -8     Military     CDIP | 20
CFP | 20
LCCC | 20