74HC74D,652 Equivalent & Substitute Parts

Part Overview

The 74HC74D,652 is a dual D-type flip-flop logic integrated circuit manufactured by Nexperia USA Inc. in 14-SOIC surface mount packaging. This device provides two independent D-type flip-flops with Set (Preset) and Reset functions, complementary outputs, and positive edge triggering. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74HC74D,652
Manufacturer	Nexperia USA Inc.
Base Product Number	74HC74
Category	Logic
Type	D-Type Flip-Flop
Number of Elements	2
Number of Bits per Element	1
Output Type	Complementary
Trigger Type	Positive Edge
Clock Frequency	82 MHz
Max Propagation Delay @ 6V, 50pF	37 ns
Voltage Supply Range	2V to 6V
Current Output High/Low	5.2 mA / 5.2 mA
Quiescent Current (Iq)	40 µA
Input Capacitance	4.6 pF
Operating Temperature Range	-40°C to 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74HC74D,652 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Compatibility Criteria:

Base product number: 74HC74
Type: D-Type flip-flop with 2 elements, 1 bit per element
Output type: Complementary
Trigger type: Positive edge
Package: 14-SOIC (0.154", 3.90mm Width)
Mounting type: Surface mount
Function: Set (Preset) and Reset capability
Voltage supply range: 2V to 6V minimum overlap
Operating temperature range: Minimum -40°C to 125°C overlap

Substitution Categories:

Direct Substitutes (Identical Specifications): Parts meeting all core criteria with matching or superior electrical performance within the specified parameters.

Similar Substitutes (Compatible Specifications): Parts meeting all core criteria with minor variations in clock frequency, propagation delay, quiescent current, or input capacitance that remain within acceptable operating margins for the 74HC74 logic family.

Upgrade Substitutes (Enhanced Performance): Parts meeting all core criteria with improved specifications (lower propagation delay, lower quiescent current, extended temperature range) suitable for designs requiring enhanced performance or reliability.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Clock Frequency (MHz)	Max Propagation Delay @ 6V, 50pF (ns)	Quiescent Current (µA)	Input Capacitance (pF)	Operating Temperature Range (°C)	RoHS Status
74HC74D,652	Nexperia USA Inc.	Obsolete	82	37	40	4.6	-40 to 125	ROHS3 Compliant
74HC74D,653	NXP Semiconductors	Active	82	37	40	4.6	-40 to 125	Not specified
MC74HC74ADR2G	onsemi	Active	35	17	2	10	-55 to 125	ROHS3 Compliant
CD74HC74M	Texas Instruments	Discontinued at DiGi Electronics	50	30	4	10	-55 to 125	ROHS3 Compliant
CD74HC74M96	Texas Instruments	Active	50	30	4	10	-55 to 125	ROHS3 Compliant
CD74HC74MT	Texas Instruments	Obsolete	50	30	4	10	-55 to 125	ROHS3 Compliant
74HC74D	Toshiba Semiconductor and Storage	Active	67	26	2	5	-40 to 85	ROHS3 Compliant
MC74HC74ADG	onsemi	Active	35	17	2	10	-55 to 125	ROHS3 Compliant
MM74HC74AM	Fairchild Semiconductor	Active	94	19	4	5	-40 to 85	ROHS3 Compliant
MM74HC74AMX	Fairchild Semiconductor	Active	94	19	4	5	-40 to 85	ROHS3 Compliant
SN74HC74DG4	Texas Instruments	Discontinued at DiGi Electronics	60	30	4	3	-40 to 85	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): Select 74HC74D,653 from NXP Semiconductors. This part maintains identical clock frequency (82 MHz), propagation delay (37 ns), and quiescent current (40 µA) specifications. The part is currently in active production status, ensuring long-term availability and supply chain stability.

For Active Production Designs (Recommended Primary Choice): Select MC74HC74ADR2G or MC74HC74ADG from onsemi, or CD74HC74M96 from Texas Instruments. These parts are in active production status and meet all core compatibility criteria. The onsemi variants offer extended temperature range (-55°C to 125°C) and lower quiescent current (2 µA), providing enhanced performance margins. The Texas Instruments CD74HC74M96 offers similar benefits with active status confirmation.

For Designs with Extended Temperature Requirements: Select MC74HC74ADR2G or MC74HC74ADG from onsemi. Both parts support the extended operating temperature range of -55°C to 125°C, compared to the original part's -40°C to 125°C specification, providing additional thermal margin for demanding applications.

For High-Speed Applications: Select MM74HC74AM or MM74HC74AMX from Fairchild Semiconductor. These parts offer the highest clock frequency (94 MHz) and fastest propagation delay (19 ns), providing performance headroom for timing-critical designs.

Compliance Considerations: All recommended substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can I use 74HC74D,653 as a direct replacement for 74HC74D,652? A: Yes. Both parts share identical electrical specifications (82 MHz clock frequency, 37 ns propagation delay, 40 µA quiescent current) and the same 14-SOIC package. The primary difference is manufacturer (NXP Semiconductors vs. Nexperia USA Inc.) and product status (Active vs. Obsolete). 74HC74D,653 is the recommended choice for new designs due to active production status.

Q: What is the difference between similar and upgrade substitutes? A: Similar substitutes maintain the core electrical specifications within acceptable operating margins. Upgrade substitutes offer enhanced performance characteristics such as lower propagation delay, reduced quiescent current, or extended temperature range. Both categories are functionally compatible with the original part.

Q: Are all substitute parts available in the same 14-SOIC package? A: Yes. All listed substitute parts use the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB designs without layout modifications.

Q: Which substitute part offers the best performance? A: MM74HC74AM and MM74HC74AMX from Fairchild Semiconductor provide the highest clock frequency (94 MHz) and fastest propagation delay (19 ns). For extended temperature range applications, MC74HC74ADR2G and MC74HC74ADG from onsemi support -55°C to 125°C operation.

Q: Can I use parts with different quiescent current specifications? A: Yes. Quiescent current variation (ranging from 2 µA to 40 µA across the substitute list) does not affect functional compatibility. Lower quiescent current values provide reduced power consumption benefits in battery-powered or low-power applications.

Q: What should I consider when selecting between active and discontinued parts? A: Active production parts (74HC74D,653, MC74HC74ADR2G, MC74HC74ADG, CD74HC74M96, 74HC74D, MM74HC74AM, MM74HC74AMX) are recommended for new designs to ensure long-term supply chain availability. Discontinued parts should only be used for legacy system maintenance or when existing inventory is available.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with environmental regulations and modern manufacturing processes.

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