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  • SN74HC573APWTE4
  • SN74HC573APWTE4 1
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SN74HC573APWTE4 Product Details

The SNx4HC573A 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

SN74HC573APWTE4 Block Diagram
(Picture: Diagram)

Technical Parameters

Number of Circuits 8 Supply Voltage Min 2 V
Logic Type D-Type Transparent Latch Maximum Operating Temperature + 85 C
Logic Family HC Minimum Operating Temperature - 40 C
Polarity Non-Inverting Package / Case TSSOP-20
Number of Output Lines 8 Packaging Reel
High Level Output Current - 7.8 mA Mounting Style SMD/SMT
Low Level Output Current 32 mA Number of Input Lines 8
Propagation Delay Time 200 ns at 2 V, 40 ns at 4.5 V, 34 ns at 6 V Factory Pack Quantity 250
Supply Voltage Max 6 V

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Texas Instruments Incorporated designs and manufactures analog technologies, digital signal processing (DSP) and microcontroller (MCU) semiconductors. TI is a leader in semiconductor solutions for ana...
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