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Octal D-Type Latch 3-State Output IC - 74HC373

Octal D-Type Latch 3-State Output IC - 74HC373

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  • Typical propagation delay: 18 ns 
  • Wide operating voltage range: 2 to 6 volts 
  • Low input current: 1 µA maximum 
  • Low quiescent current: 80 µA maximum (74 Series) 
  • Output drive capability: 15 LS-TTL loads

Octal D-Type Latch 3-State Output IC - 74HC373

The 74HC Series 74HC373 high-speed octal D-type latches utilize advanced silicon-gate CMOS technology. They possess the high noise immunity and low power consumption of standard CMOS integrated circuits, as well as the ability to drive 15 LS-TTL loads. Due to the large output drive capability and the 3-STATE feature, these devices are ideally suited for interfacing with bus lines in a bus-organized system. 

When the LATCH ENABLE input is HIGH, the Q outputs will follow the D inputs. When the LATCH ENABLE goes LOW, data at the D inputs will be retained at the outputs until LATCH ENABLE returns HIGH again. When a high logic level is applied to the OUTPUT CONTROL input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements. The 74HC logic family is speed, function, and pin-out compatible with the standard 74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and the ground.


Pinout Of 74HC373 IC

Package Includes:

  • 1 x IC - 74HC373


Supply Voltage (VCC − 0.5 to + 7.0V  
Input Voltage (VIN)  −1.5VCC     + 1.5V
Output Voltage (VOUT)  − 0.5 to VCC + 0.5V
Clamp Diode Current (IIK, IOK)  ± 20 mA
DC Output Current, per pin (IOUT) ± 35 mA
 DC VCC or GND Current, per pin (ICC) ± 70 mA 
 Storage Temperature Range (TSTG) − 65°C to + 150°C 
Power Dissipation (PD) (Note 4)  600 mW
S.O. Package only  500 mW
Lead Temperature (TL) (Soldering 10 seconds)  260°C

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1.What is 74HC373?

  • The 74HC373 is a three-state octal D-type transparent latch. The device has inputs for latch enable (LE) and output enable (OE). When LE is HIGH, data from the inputs is routed to the latches.