CD74HC74MT Equivalent & Substitute Parts

Part Overview

The CD74HC74MT is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments in 14-SOIC surface mount packaging. This device functions as a 2-element D-type flip-flop with complementary outputs, positive edge triggering, and Set/Reset capability. The CD74HC74MT is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and production applications. Equivalent parts maintain identical or superior electrical and mechanical characteristics while offering active product status and continued availability.

Key Parameters

Parameter	CD74HC74MT	Unit
Manufacturer	Texas Instruments	—
Series	74HC	—
Package Type	14-SOIC (0.154", 3.90mm Width)	—
Product Status	Obsolete	—
Type	D-Type Flip-Flop	—
Number of Elements	2	—
Number of Bits per Element	1	—
Clock Frequency	50	MHz
Max Propagation Delay @ 6V, 50pF	30	ns
Voltage Supply Range	2–6	V
Current - Output High/Low	5.2 / 5.2	mA
Current - Quiescent (Iq)	4	µA
Input Capacitance	10	pF
Operating Temperature Range	−55 to +125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CD74HC74MT is determined by the following criteria:

Functional Equivalence: All substitute parts must be dual D-type flip-flops (2 elements, 1 bit per element) with complementary outputs, positive edge triggering, and Set/Reset function.

Electrical Compatibility: Supply voltage range must encompass or match the 2–6V specification. Propagation delay, output current, and quiescent current must be within acceptable operating margins for the application. Input capacitance and clock frequency specifications must support the intended circuit timing.

Mechanical Compatibility: Package type must be 14-SOIC (0.154", 3.90mm Width) surface mount to ensure PCB footprint compatibility.

Compliance & Availability: Substitute parts must have active product status and current manufacturing availability. RoHS3 compliance and MSL rating of 1 are required for modern production environments.

Series Compatibility: Parts from the 74HC, 74HCS, and 74VHC logic families are acceptable substitutes, as these series share compatible pinouts and electrical characteristics within the specified voltage and timing parameters.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Clock Freq (MHz)	Prop Delay @ 6V, 50pF (ns)	Iq (µA)	Temp Range (°C)	Package
CD74HC74MT	Texas Instruments	74HC	Obsolete	50	30	4	−55 to +125	14-SOIC
SN74HCS74BQAR	Texas Instruments	74HCS	Active	105	15	2	−40 to +125	14-QFN
CD74HC74M96	Texas Instruments	74HC	Active	50	30	4	−55 to +125	14-SOIC
MC74HC74ADR2G	onsemi	74HC	Active	35	17	2	−55 to +125	14-SOIC
MM74HC74AMX	Fairchild Semiconductor	74HC	Active	94	19	4	−40 to +85	14-SOIC
74HC74D	Toshiba Semiconductor and Storage	74HC	Active	67	26	2	−40 to +85	14-SOIC
74HC74D,653	NXP Semiconductors	74HC	Active	82	37	40	−40 to +125	14-SOIC
74HC74D-Q100,118	Nexperia USA Inc.	74HC	Active	82	37	40	−40 to +125	14-SOIC
74HC74D/AUJ	NXP USA Inc.	74HC	Active	82	37	40	−40 to +125	14-SOIC
74VHC74M	Fairchild Semiconductor	74VHC	Active	115	9.3	2	−40 to +85	14-SOIC

Engineering Selection Recommendations

Parametric Equivalent (Identical Electrical Performance): CD74HC74M96 is the direct parametric equivalent, maintaining the same clock frequency (50 MHz), propagation delay (30 ns), quiescent current (4 µA), and extended temperature range (−55 to +125°C) as the CD74HC74MT. This part is manufactured by Texas Instruments and carries active product status with ROHS3 compliance.

Direct Substitutes (14-SOIC Package, Active Status): MC74HC74ADR2G (onsemi), 74HC74D (Toshiba), and 74VHC74M (Fairchild) are direct mechanical substitutes in 14-SOIC packaging with active product status. These parts meet the functional and electrical requirements for D-type flip-flop operation within the 2–6V supply range. MC74HC74ADR2G offers superior propagation delay (17 ns) and lower quiescent current (2 µA). 74HC74D provides moderate performance with 26 ns propagation delay. 74VHC74M delivers the highest clock frequency (115 MHz) and fastest propagation delay (9.3 ns) but operates within a narrower supply range (2–5.5V).

Alternative Package Consideration: SN74HCS74BQAR (Texas Instruments, 74HCS series) offers superior performance with 105 MHz clock frequency and 15 ns propagation delay but uses 14-QFN packaging instead of 14-SOIC, requiring PCB layout modification.

High-Quiescent-Current Variants: 74HC74D,653 (NXP), 74HC74D-Q100,118 (Nexperia), and 74HC74D/AUJ (NXP USA) exhibit elevated quiescent current (40 µA) compared to the original specification (4 µA). These parts are suitable only for applications where quiescent current is not a design constraint.

Compliance & Availability: All recommended substitutes carry ROHS3 compliance and MSL rating of 1. Inventory availability is confirmed for all listed parts.

Frequently Asked Questions (FAQ)

Q: Can CD74HC74M96 directly replace CD74HC74MT without circuit modification?

A: Yes. CD74HC74M96 is a parametric equivalent with identical electrical specifications (50 MHz clock frequency, 30 ns propagation delay, 4 µA quiescent current) and the same 14-SOIC package. No circuit or PCB layout changes are required.

Q: What is the primary difference between 74HC and 74VHC series substitutes?

A: The 74VHC series (represented by 74VHC74M) operates at higher clock frequencies (115 MHz vs. 50 MHz) with faster propagation delays (9.3 ns vs. 30 ns) but is limited to a narrower supply voltage range (2–5.5V vs. 2–6V). 74VHC is suitable for applications requiring higher speed but not requiring the full 6V supply capability.

Q: Why do some substitutes show higher quiescent current (40 µA)?

A: Variants such as 74HC74D,653, 74HC74D-Q100,118, and 74HC74D/AUJ from NXP and Nexperia exhibit higher quiescent current specifications. These parts remain functionally equivalent but are appropriate only for applications where standby power consumption is not critical.

Q: Is the 14-QFN package of SN74HCS74BQAR compatible with the 14-SOIC footprint?

A: No. The 14-QFN (3×2.5 mm) and 14-SOIC (0.154", 3.90mm Width) packages have different pinout geometries and footprints. SN74HCS74BQAR requires PCB redesign and cannot be used as a direct drop-in replacement.

Q: Which substitute offers the best balance of performance and compatibility?

A: MC74HC74ADR2G (onsemi) provides superior propagation delay (17 ns), lower quiescent current (2 µA), extended temperature range (−55 to +125°C), and maintains the 14-SOIC package footprint. Alternatively, CD74HC74M96 (Texas Instruments) offers identical electrical performance to the original part with confirmed active status.

Q: Are all listed substitutes RoHS3 compliant?

A: All recommended substitutes carry ROHS3 compliance certification. Moisture sensitivity level (MSL) is rated at 1 (Unlimited) for all parts, meeting modern production and storage requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message