CD74HCT574QPWREP Equivalent & Substitute Parts

Part Overview

The CD74HCT574QPWREP is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, configured as a single 8-bit element with tri-state, non-inverted outputs. This component operates as a standard logic device in the 74HCT series and is actively produced. Substitute parts are necessary to address supply chain variations, inventory availability, and application-specific requirements such as automotive qualification or extended temperature ranges.

Key Parameters

Parameter	Value
Part Number	CD74HCT574QPWREP
Manufacturer	Texas Instruments
Type	D-Type Flip Flop, 1 Element, 8 Bit
Output Type	Tri-State, Non-Inverted
Clock Frequency	60 MHz
Max Propagation Delay	33 ns @ 4.5V, 50pF
Trigger Type	Positive Edge
Output Current (High/Low)	6 mA / 6 mA
Supply Voltage	4.5V ~ 5.5V
Quiescent Current	8 µA
Input Capacitance	10 pF
Operating Temperature	-40°C ~ 125°C
Package	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CD74HCT574QPWREP are qualified based on the following criteria:

Core Electrical Parameters (Must Match):

D-Type flip-flop configuration with 1 element, 8-bit output
Tri-state, non-inverted output type
Positive edge trigger
20-TSSOP package (0.173", 4.40mm Width)
Supply voltage range: 4.5V ~ 5.5V
Output current capability: 6 mA minimum (high and low)
Propagation delay: 33 ns maximum @ 4.5V, 50pF
Operating temperature: -40°C minimum to 125°C maximum
RoHS3 compliance

Allowable Variations:

Clock frequency: 30 MHz to 76 MHz (all exceed 60 MHz requirement or are acceptable for standard logic applications)
Quiescent current: 4 µA to 8 µA
Input capacitance: 4.6 pF to 10 pF
Packaging format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel®
Manufacturer: Texas Instruments, Nexperia USA Inc., or onsemi
Grade and qualification: Commercial or Automotive (AEC-Q100)

Parameter Comparison

Parameter	CD74HCT574QPWREP (Main)	CD74HCT574QPWRG4Q1	74HCT574PW,118	74HCT574PW-Q100,11	MM74HCT574MTCX	MC74HCT574ADTR2G
Manufacturer	Texas Instruments	Texas Instruments	Nexperia USA Inc.	Nexperia USA Inc.	onsemi	onsemi
Type	D-Type, 1 Element, 8 Bit	D-Type, 1 Element, 8 Bit	D-Type, 1 Element, 8 Bit	D-Type, 1 Element, 8 Bit	D-Type, 1 Element, 8 Bit	D-Type, 1 Element, 8 Bit
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted
Clock Frequency	60 MHz	60 MHz	76 MHz	76 MHz	33 MHz	30 MHz
Max Propagation Delay	33 ns @ 4.5V, 50pF	33 ns @ 4.5V, 50pF	33 ns @ 4.5V, 50pF	33 ns @ 4.5V, 50pF	30 ns @ 5V, 50pF	30 ns @ 5V, 50pF
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Output Current (High/Low)	6 mA / 6 mA	6 mA / 6 mA	6 mA / 6 mA	6 mA / 6 mA	7.2 mA / 7.2 mA	6 mA / 6 mA
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Quiescent Current	8 µA	8 µA	8 µA	8 µA	8 µA	4 µA
Input Capacitance	10 pF	10 pF	4.6 pF	4.6 pF	10 pF	10 pF
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-55°C ~ 125°C
Grade	Commercial	Automotive	Commercial	Automotive	Commercial	Commercial
Qualification	None	AEC-Q100	None	AEC-Q100	None	None
Package	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

CD74HCT574QPWRG4Q1 (Texas Instruments, Automotive Grade, AEC-Q100): This substitute is electrically identical to the main part with identical clock frequency and propagation delay specifications. It carries automotive qualification (AEC-Q100) and is suitable for applications requiring automotive-grade components. Available in Cut Tape & Digi-Reel® packaging format.

74HCT574PW,118 (Nexperia USA Inc., Commercial Grade): This substitute offers higher clock frequency (76 MHz) and lower input capacitance (4.6 pF) compared to the main part. Propagation delay remains at 33 ns. Suitable for general commercial applications requiring standard logic performance. Available in Tape & Reel packaging with high inventory availability.

74HCT574PW-Q100,11 (Nexperia USA Inc., Automotive Grade, AEC-Q100): This substitute combines automotive qualification (AEC-Q100) with higher clock frequency (76 MHz) and lower input capacitance (4.6 pF). Operating temperature range matches the main part (-40°C ~ 125°C). Suitable for automotive applications requiring enhanced performance specifications.

MM74HCT574MTCX (onsemi, Commercial Grade): This substitute features lower propagation delay (30 ns @ 5V) and higher output current capability (7.2 mA). Operating temperature range is limited to -40°C ~ 85°C, which is narrower than the main part. Suitable for applications not requiring the full 125°C upper temperature limit. Available in Cut Tape & Digi-Reel® packaging.

MC74HCT574ADTR2G (onsemi, Commercial Grade, Manufacturer Recommended): This substitute is manufacturer-recommended and offers extended operating temperature range (-55°C ~ 125°C) and lower quiescent current (4 µA). Clock frequency is 30 MHz and propagation delay is 30 ns @ 5V. Suitable for applications requiring extended low-temperature operation or reduced power consumption. Available in Tape & Reel packaging.

Frequently Asked Questions (FAQ)

Q: Can I use 74HCT574PW,118 as a direct replacement for CD74HCT574QPWREP?

A: Yes. Both parts share identical electrical characteristics for the core parameters: D-type flip-flop configuration, 8-bit output, tri-state non-inverted outputs, positive edge trigger, 33 ns propagation delay, 6 mA output current, and 4.5V ~ 5.5V supply voltage. The 74HCT574PW,118 offers higher clock frequency (76 MHz vs. 60 MHz) and lower input capacitance (4.6 pF vs. 10 pF), which are compatible enhancements. Both are ROHS3 compliant with MSL rating 1.

Q: What is the difference between commercial and automotive-grade substitutes?

A: Automotive-grade substitutes (CD74HCT574QPWRG4Q1 and 74HCT574PW-Q100,11) carry AEC-Q100 qualification, indicating compliance with automotive industry reliability and quality standards. Commercial-grade parts do not carry this certification. Automotive-grade parts are required for applications in automotive systems or other industries with equivalent qualification requirements.

Q: Does the operating temperature range affect substitution compatibility?

A: Operating temperature range affects compatibility only if your application requires operation outside the specified range. The main part operates from -40°C ~ 125°C. MM74HCT574MTCX is limited to -40°C ~ 85°C and is unsuitable for applications requiring operation above 85°C. MC74HCT574ADTR2G extends to -55°C and is suitable for applications requiring extended low-temperature operation.

Q: Are there packaging format differences between substitutes?

A: Yes. The main part is supplied in Tape & Reel (TR) format. CD74HCT574QPWRG4Q1 and MM74HCT574MTCX are supplied in Cut Tape (CT) & Digi-Reel® format. All other substitutes use Tape & Reel format. Packaging format affects handling and automated assembly processes but does not affect electrical performance or pin compatibility.

Q: Which substitute offers the best performance improvement?

A: 74HCT574PW,118 and 74HCT574PW-Q100,11 both offer improved clock frequency (76 MHz vs. 60 MHz) and reduced input capacitance (4.6 pF vs. 10 pF). MC74HCT574ADTR2G offers reduced quiescent current (4 µA vs. 8 µA) for power-sensitive applications and extended low-temperature operation (-55°C minimum).

Q: Can I substitute MM74HCT574MTCX if my application operates at 100°C?

A: No. MM74HCT574MTCX is rated only to 85°C maximum operating temperature. For applications requiring operation at 100°C, use CD74HCT574QPWREP, CD74HCT574QPWRG4Q1, 74HCT574PW,118, 74HCT574PW-Q100,11, or MC74HCT574ADTR2G, all of which support 125°C operation.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes are ROHS3 compliant with MSL rating 1 (Unlimited), matching the main part's environmental compliance status.

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