SN54HC273 Octal D-type Flip-Flops With Clear |

SN54HC273 (ACTIVE) Octal D-type Flip-Flops With Clear



The SNx4HC273 devices are positive-edge-triggered D-type flip-flops with a direct active low clear (CLR) input.

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. Clock triggering occurs at a particular voltage level and is not related directly 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.


  • Wide Operating Voltage Range of 2 V to 6 V
  • Outputs Can Drive Up to 10 LSTTL Loads
  • Low Power Consumption, 80-µA Maximum ICC
  • Typical tpd = 12 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1-µA Maximum
  • Contain Eight Flip-Flops With Single-Rail Outputs
  • Direct Clear Input
  • Individual Data Input to Each Flip-Flop
  • On Products Compliant to MIL-PRF-38535,
    All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

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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)
SN54HC273 Order now HC     2     6     8     3.3
28     0.08     34     5.2     -5.2     No     Military     -55 to 125    
SN74HC273 Order now HC     2     6     8     3.3
28     0.08     34     5.2     -5.2     No     Catalog     -40 to 85    
SN74HC273-Q1 Order now HC     2     6     8     3.3
28     0.08     34     5.2     -5.2     No     Automotive     -40 to 125