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Product Detailed Parameters
- Description：IC FF D-TYPE SNGL 8BIT 20TSSOP
- Series：74HCT
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Standard
- Type：D-Type
- Output Type：Tri-State, Non-Inverted
- Number of Elements：1
- Number of Bits per Element：8
- Clock Frequency：60 MHz
- Max Propagation Delay @ V, Max CL：33ns @ 4.5V, 50pF
- Trigger Type：Positive Edge
- Current - Output High, Low：6mA, 6mA
- Voltage - Supply：4.5V ~ 5.5V
- Current - Quiescent (Iq)：8 µA
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：20-TSSOP
- Package / Case：20-TSSOP (0.173", 4.40mm Width)
- Input Capacitance：10 pF
- Grade：-
- Qualification：-
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Overview
The CD74HCT574PWR is an octal edge-triggered D-type flip-flop manufactured by Texas Instruments. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a typical propagation delay of 22 ns at 5 V, with a maximum delay of 33 ns at 4.5 V under 50 pF load conditions. It supports a clock frequency of up to 60 MHz and delivers output drive currents of ±6 mA. Static current consumption is typically 8 µA, with low input current of 1 µA maximum.
Feature Summary
- Octal configuration providing eight independent D-type flip-flops in a single package
- Three-state non-inverting outputs designed for direct bus driving applications
- TTL-compatible inputs ensuring compatibility with standard logic families
- Edge-triggered data storage mechanism synchronized with the clock signal
Applications
- Buffer register implementations
- I/O port interfacing
- Bidirectional bus driver circuits
- Working register storage units
Procurement Notes
Verify the specific suffix 'PWR' corresponds to the TSSOP-20 surface-mount package when sourcing. Confirm RoHS compliance status as indicated in official documentation. Ensure the ordering part number matches the exact manufacturer designation to avoid pinout or electrical specification mismatches during integration.
Selection Notes
Select this component for designs requiring 8-bit parallel data storage with bus-compatible outputs. The HCT series ensures TTL input compatibility while maintaining CMOS power efficiency. Verify that the 4.5 V to 5.5 V operating range aligns with the system power supply. Consider the 20-TSSOP package dimensions for PCB layout constraints.
Part Context
This device belongs to the SN74HCT574 family of octal D-type flip-flops. It is part of Texas Instruments' broader 74HCT logic series, which bridges HC and HCT specifications. The PWR suffix denotes the specific TSSOP-20 packaging variant used for surface-mount assembly.
Replacement Considerations
SN74AHCT574PWRG4 offers similar functionality with potentially different speed characteristics. CD74HCT574PWRE4 is an equivalent version with identical electrical specifications. Verify pinout compatibility before substitution.
