SN54HC273 Octal D-type Flip-Flops With Clear |


Octal D-type Flip-Flops With Clear

Octal D-type Flip-Flops With Clear - SN54HC273


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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Parametrics Compare all products in Flip-Flop/Latch/Registers

Technology Family
VCC (Min) (V)
VCC (Max) (V)
Bits (#)
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
Input Type
3-State Output
IOL (Max) (mA)
Output Type
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
SN54HC273 SN74HC273 SN74HC273-Q1
HC     HC     HC    
2     2     2    
6     6     6    
8     8     8    
28     28     28    
0.08     0.08     0.08    
34     34     34    
CMOS     CMOS     CMOS    
No     No     No    
5.2     5.2     5.2    
CMOS     CMOS     CMOS    
Military     Catalog     Automotive    
-55 to 125     -40 to 85     -40 to 125    
See datasheet (CDIP)
See datasheet (CFP)
20LCCC: 79 mm2: 8.89 x 8.89(LCCC)    
See datasheet (PDIP)
20SO: 98 mm2: 7.8 x 12.6(SO)
20SOIC: 132 mm2: 10.3 x 12.8(SOIC)
20SSOP: 56 mm2: 7.8 x 7.2(SSOP)
20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP)    
20SOIC: 132 mm2: 10.3 x 12.8(SOIC)
20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP)    

Other qualified versions of SN54HC273

Version Part Number Definition
Catalog SN74HC273 TI's standard catalog product
Automotive SN74HC273-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
Space SN54HC273-SP Radiation tolerant, ceramic packaging and qualified for use in Space-based application