SN74HCT377 Octal D-Type Flip-Flops With Clock Enable |

SN74HCT377 (ACTIVE) Octal D-Type Flip-Flops With Clock Enable

Octal D-Type Flip-Flops With Clock Enable - SN74HCT377


These devices are positive-edge-triggered D-type flip-flops. The ’HCT377 devices are similar to the ’'HCT273 devices, but feature a latched clock-enable (CLKEN)\ input instead of a common clear.

Information at the data (D) inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock (CLK) pulse if CLKEN\ is low. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse. When CLK is at either the high or low level, the D input has no effect at the output. These devices are designed to prevent false clocking by transitions at CLKEN\.


  • Operating Voltage Range of 4.5 V to 5.5 V
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 80-&miccro;A Max ICC
  • Typical tpd = 12 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Inputs Are TTL-Voltage Compatible
  • Contain Eight Flip-Flops With Single-Rail Outputs
  • Clock Enable Latched to Avoid False Clocking
  • Applications Include:
    • Buffer/Storage Registers
    • Shift Registers
    • Pattern Generators


Compare all products in D-type flip-flop Email Download to Excel
Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) 3-state output Rating Operating temperature range (C)
SN74HCT377 Order now HCT     4.5     5.5     8     5     35     0.08     35     4     -4     No     Catalog     -40 to 85