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74HC573 IC – (SMD Package) – Octal D-Type Transparent Latch IC (74573 IC)

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The 74HC573 devices are octal transparent D-type latches that feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. While the latch-enable (LE) input is high, the Q outputs respond to the data (D) inputs. When LE is low, the outputs are latched to retain the data that was set up.


  • Wide Operating Voltage Range from 2 V to 6 V
  • High-Current 3-State Outputs Drive Bus Lines Directly up to 15 LSTTL Loads
  • Low Power Consumption: 80-µA Maximum ICC
  • Typical tpd = 21 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current: 1 µA (Maximum)
  • Bus-Structured Pinout


  • Buffer Registers
  • Bidirectional Bus Drivers
  • Working Registers


Symbol Parameter Value Unit
VCC Supply Voltage − 0.5 to + 7.0V V
IIK DC Input Diode Current ±20 mA
IOK DC Output Diode Current ±20 mA
IO Output Current ± 35 mA
ICC or IGND DC VCC or GND Current, per pin ± 70 mA
TSTG Storage Temperature Range − 65°C to + 150 °C
TJ Junction Temperature 150  °C


* product image for illustration purposes only. actual product may vary.


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