MM74HC374MTC Equivalent & Substitute Parts

Part Overview

The MM74HC374MTC is a D-type flip-flop logic integrated circuit manufactured by onsemi, designed for 8-bit data storage and transfer applications. It features tri-state, non-inverted outputs and operates across a 2V to 6V supply voltage range. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility while meeting the same electrical and mechanical specifications required for direct replacement or design adaptation.

Key Parameters

Parameter	MM74HC374MTC
Manufacturer	onsemi
Series	74HC
Type	D-Type Flip-Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	35 MHz
Max Propagation Delay @ 6V, 150pF	40 ns
Trigger Type	Positive Edge
Voltage Supply Range	2V ~ 6V
Current - Output High, Low	7.8 mA, 7.8 mA
Current - Quiescent (Iq)	8 µA
Input Capacitance	5 pF
Operating Temperature Range	-40°C ~ 85°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the MM74HC374MTC are classified based on the following substitution criteria:

Primary Substitution Parameters:

Series: 74HC (logic family compatibility)
Type: D-Type Flip-Flop (functional equivalence)
Number of Elements: 1 (functional equivalence)
Number of Bits per Element: 8 (functional equivalence)
Output Type: Tri-State, Non-Inverted (functional equivalence)
Trigger Type: Positive Edge (functional equivalence)
Voltage Supply Range: 2V ~ 6V (electrical compatibility)
Package / Case: 20-TSSOP or 20-SSOP (mechanical compatibility)
Mounting Type: Surface Mount (assembly compatibility)

Grouping Categories:

Group 1: Direct Functional Equivalents (74HC374 Base Number) Parts with identical base product number (74HC374), same 8-bit configuration, tri-state non-inverted output, and compatible packaging. These parts maintain full functional compatibility with the MM74HC374MTC.

Group 2: Parametric Equivalents (74HC574 Base Number) Parts with 74HC574 base number share the same 8-bit D-type flip-flop architecture and tri-state non-inverted output configuration. These parts are functionally equivalent but use a different base product designation.

Group 3: Package Variants Parts with identical electrical specifications but different package designations (20-TSSOP vs. 20-SSOP) maintain functional compatibility with potential mechanical assembly considerations.

Parameter Comparison

Part Number	Manufacturer	Base Product	Clock Frequency	Max Propagation Delay @ 6V	Quiescent Current (Iq)	Operating Temperature	Package	Product Status
MM74HC374MTC	onsemi	74HC374	35 MHz	40 ns @ 150pF	8 µA	-40°C ~ 85°C	20-TSSOP	Obsolete
MC74HC374ADTR2G	onsemi	74HC374	35 MHz	21 ns @ 50pF	4 µA	-55°C ~ 125°C	20-TSSOP	Active
MC74HC574ADTR2G	onsemi	74HC574	35 MHz	27 ns @ 50pF	4 µA	-55°C ~ 125°C	20-TSSOP	Active
NLV74HC374ADTR2G	onsemi	74HC374	35 MHz	21 ns @ 50pF	4 µA	-55°C ~ 125°C	20-TSSOP	Obsolete
NLV74HC574ADTR2G	onsemi	74HC574	35 MHz	27 ns @ 50pF	4 µA	-55°C ~ 125°C	20-TSSOP	Obsolete
MM74HC574MTC	Fairchild Semiconductor	74HC574	35 MHz	27 ns @ 150pF	8 µA	-40°C ~ 85°C	20-TSSOP	Active
74HC374PW,118	Nexperia USA Inc.	74HC374	83 MHz	28 ns @ 50pF	4 µA	-40°C ~ 125°C	20-TSSOP	Active
MC74HC374ADTG	onsemi	74HC374	35 MHz	21 ns @ 50pF	4 µA	-55°C ~ 125°C	20-TSSOP	Obsolete
SN74HC374APWR	Texas Instruments	74HC374	70 MHz	31 ns @ 50pF	8 µA	-40°C ~ 85°C	20-TSSOP	Active
SN74HC374DBR	Texas Instruments	74HC374	70 MHz	31 ns @ 50pF	8 µA	-40°C ~ 85°C	20-SSOP	Active
SN74HC374PWR	Texas Instruments	74HC374	70 MHz	31 ns @ 50pF	8 µA	-40°C ~ 85°C	20-TSSOP	Active

Engineering Selection Recommendations

For Active Product Status Requirement:

When obsolescence necessitates replacement with an active product, the following parts maintain full functional compatibility with the MM74HC374MTC:

MC74HC374ADTR2G (onsemi): Active status, 74HC374 base product, 20-TSSOP package. Extended operating temperature range (-55°C ~ 125°C) and improved quiescent current (4 µA) compared to the original part. Meets ROHS3 compliance.
SN74HC374APWR (Texas Instruments): Active status, 74HC374 base product, 20-TSSOP package. Operating temperature range -40°C ~ 85°C matches the original specification. ROHS3 compliant.
SN74HC374PWR (Texas Instruments): Active status, 74HC374 base product, 20-TSSOP package. Highest inventory availability (65,200 pcs). Operating temperature range -40°C ~ 85°C. ROHS3 compliant.
74HC374PW,118 (Nexperia USA Inc.): Active status, 74HC374 base product, 20-TSSOP package. Extended operating temperature range (-40°C ~ 125°C). ROHS3 compliant.

For 74HC574 Base Product Substitution:

MC74HC574ADTR2G (onsemi): Active status, 74HC574 base product, functionally equivalent 8-bit D-type flip-flop with tri-state non-inverted output. Extended operating temperature range (-55°C ~ 125°C). ROHS3 compliant.
MM74HC574MTC (Fairchild Semiconductor): Active status, 74HC574 base product, 20-TSSOP package. Operating temperature range -40°C ~ 85°C matches the original specification. ROHS3 compliant.

For Package Variant Consideration:

SN74HC374DBR (Texas Instruments): Active status, 74HC374 base product. Uses 20-SSOP package (0.209", 5.30mm Width) instead of 20-TSSOP. Electrical specifications identical to SN74HC374PWR. Assembly considerations required for different package footprint.

All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can MC74HC374ADTR2G directly replace MM74HC374MTC in existing designs?

A: Yes. MC74HC374ADTR2G maintains identical functional specifications: 74HC374 base product, 8-bit D-type flip-flop, tri-state non-inverted output, positive edge trigger, 2V ~ 6V supply voltage, and 20-TSSOP package. The part is active status and ROHS3 compliant. Extended operating temperature range (-55°C ~ 125°C) and lower quiescent current (4 µA vs. 8 µA) provide improved performance margins.

Q: What is the difference between 74HC374 and 74HC574 base products?

A: Both are 8-bit D-type flip-flops with tri-state non-inverted outputs, positive edge trigger, and identical electrical specifications (2V ~ 6V supply, 7.8 mA output current). The base product designation reflects different manufacturer product lines. Functionally, they are equivalent for applications requiring 8-bit data storage and transfer.

Q: Why does SN74HC374DBR use a different package (20-SSOP vs. 20-TSSOP)?

A: SN74HC374DBR uses 20-SSOP package (0.209", 5.30mm Width) compared to the standard 20-TSSOP (0.173", 4.40mm Width). Electrical specifications are identical to other SN74HC374 variants. This package variant requires PCB footprint modification and is not a direct mechanical replacement without layout redesign.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed maintain ROHS3 compliance, consistent with the original MM74HC374MTC specification.

Q: What is the inventory status of substitute parts?

A: MC74HC374ADTR2G (4,820 pcs), SN74HC374PWR (65,200 pcs), and SN74HC374APWR (3,400 pcs) maintain substantial inventory levels. NLV74HC374ADTR2G and NLV74HC574ADTR2G are obsolete status despite current inventory availability.

Q: Can I use an obsolete substitute part if inventory is available?

A: Obsolete status parts (NLV74HC374ADTR2G, NLV74HC574ADTR2G, MC74HC374ADTG) carry supply chain risk. Active status parts (MC74HC374ADTR2G, SN74HC374PWR, SN74HC374APWR, 74HC374PW,118) are recommended for new designs and long-term production requirements.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: 74HC series logic family, D-type flip-flop function, 8-bit configuration, tri-state non-inverted output, positive edge trigger, 2V ~ 6V supply voltage range, and 20-TSSOP or 20-SSOP package. All listed substitute parts meet these criteria.

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