SN54HC377 - Octal, Hex, And Quad D-type Flip-Flops With Clock Enable

These devices are positive-edge-triggered octal D-type flip-flops with an enable input. The ’HC377 devices are similar to the ’HC273 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\.

• Wide Operating Voltage Range of 2 V to 6 V
• Outputs Can Drive Up To 10 LSTTL Loads
• Low Power Consumption, 80-µA Max I_CC
• Typical t_pd = 12 ns
• ±4-mA Output Drive at 5 V
• Low Input Current of 1 µA Max
• Eight Flip-Flops With Single-Rail Outputs
• Clock Enable Latched to Avoid False Clocking
• Applications Include:
  • Buffer/Storage Registers
  • Shift Registers
  • Pattern Generators