74VHC373M Equivalent & Substitute Parts

Part Overview

The 74VHC373M is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 74VHC373M operates across a 2V to 5.5V supply voltage range with a 5ns propagation delay and is housed in a 20-SOIC package suitable for surface mount applications.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	2V ~ 5.5V
Independent Circuits	1
Delay Time - Propagation	5ns
Current - Output High, Low	8mA, 8mA
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 74VHC373M is determined by the following critical parameters: logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage range (2V ~ 5.5V), independent circuits (1), output current capability (8mA minimum for both high and low), and package compatibility (20-SOIC form factor). Parts meeting these electrical and mechanical specifications are classified as direct substitutes. Parts with identical electrical characteristics but different packaging formats are classified as direct manufacturer equivalents with packaging considerations. Parts with enhanced performance specifications (lower propagation delay, extended temperature range) or different base product numbers are classified as upgrade or parametric equivalents.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Circuit	Output Type	Voltage Supply	Propagation Delay	Output Current (mA)	Operating Temp	Package	Product Status
74VHC373M	onsemi	D-Type Transparent Latch	8:8	Tri-State	2V ~ 5.5V	5ns	8, 8	-40°C ~ 85°C	20-SOIC	Obsolete
MC74VHC373DWR2G	onsemi	D-Type Transparent Latch	8:8	Tri-State	2V ~ 5.5V	4.9ns	8, 8	-40°C ~ 85°C	20-SOIC	Active
74VHC573M	Fairchild Semiconductor	Bus Driver	N/A	N/A	N/A	N/A	N/A	N/A	N/A	Active
SN74AHC373DW	Texas Instruments	D-Type Transparent Latch	8:8	Tri-State	2V ~ 5.5V	1ns	8, 8	-40°C ~ 85°C	20-SOIC	Last Time Buy
SN74AHC373DWR	Texas Instruments	D-Type Transparent Latch	8:8	Tri-State	2V ~ 5.5V	1ns	8, 8	-40°C ~ 85°C	20-SOIC	Active
74AHC373D,118	NXP USA Inc.	D-Type Transparent Latch	8:8	Tri-State	2V ~ 5.5V	4ns	8, 8	-40°C ~ 125°C	20-SOIC	Active
SN74AHC373NSR	Texas Instruments	D-Type Transparent Latch	8:8	Tri-State	2V ~ 5.5V	1ns	8, 8	-40°C ~ 85°C	20-SO	Active

Engineering Selection Recommendations

MC74VHC373DWR2G is the primary direct substitute, manufactured by onsemi with active product status and identical electrical specifications to the 74VHC373M. This part maintains the same supply voltage range, output current capability, and operating temperature limits while offering marginally improved propagation delay (4.9ns versus 5ns). Packaging is supplied in Tape & Reel format.

SN74AHC373DWR (Texas Instruments) and SN74AHC373DW (Texas Instruments) are direct electrical equivalents with active and Last Time Buy status respectively. Both feature superior propagation delay performance (1ns) and maintain full compatibility with the 74VHC373M electrical requirements. SN74AHC373DWR is available in Tape & Reel packaging and represents the highest inventory availability among active substitutes.

74AHC373D,118 (NXP USA Inc.) is an upgrade substitute offering extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) with active product status and 4ns propagation delay. This part is available in bulk packaging.

SN74AHC373NSR (Texas Instruments) is a similar substitute with active status and 1ns propagation delay. Package width differs (5.30mm versus 7.50mm), requiring PCB layout verification before selection.

74VHC573M (Fairchild Semiconductor) is listed as a parametric equivalent with active status but lacks detailed electrical parameter documentation in the provided data set.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the 74VHC373M.

Frequently Asked Questions (FAQ)

Q: Can MC74VHC373DWR2G directly replace 74VHC373M without PCB modifications?

A: Yes. MC74VHC373DWR2G maintains identical electrical specifications and 20-SOIC package dimensions. The only difference is packaging format (Tape & Reel versus bulk) and marginally improved propagation delay. No PCB layout changes are required.

Q: What is the primary advantage of SN74AHC373DWR over the 74VHC373M?

A: SN74AHC373DWR offers superior propagation delay performance (1ns versus 5ns) while maintaining all other electrical parameters. It is manufactured by Texas Instruments with active product status and highest inventory availability.

Q: Why is 74AHC373D,118 classified as an upgrade substitute?

A: 74AHC373D,118 extends the operating temperature range to -40°C to 125°C, compared to the 74VHC373M's -40°C to 85°C. This provides additional thermal margin for applications requiring higher temperature operation. All other electrical specifications remain compatible.

Q: Does SN74AHC373NSR require PCB redesign due to package differences?

A: SN74AHC373NSR uses a 20-SO package with 5.30mm width versus the 74VHC373M's 20-SOIC with 7.50mm width. PCB footprint verification is required before selection. Pin count and electrical function remain identical.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts maintain ROHS3 compliance consistent with the 74VHC373M, ensuring regulatory compatibility for new designs.

Q: What is the difference between 74VHC and 74AHC series logic?

A: Both series are CMOS logic families with compatible electrical specifications for this application. The 74AHC series (Advanced High-Speed CMOS) offers improved propagation delay performance. Supply voltage range and output current specifications remain equivalent.

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