74VHC374MTC Equivalent & Substitute Parts

Part Overview

The 74VHC374MTC is a single 8-bit D-type flip-flop logic integrated circuit manufactured by onsemi in a 20-TSSOP surface mount package. This device functions as a standard positive edge-triggered flip-flop with tri-state, non-inverted outputs, operating across a 2V to 5.5V supply voltage range. The 74VHC374MTC is classified as obsolete, necessitating identification of equivalent and substitute components for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74VHC374MTC
Manufacturer	onsemi
Series	74VHC
Type	D-Type Flip-Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	120 MHz
Max Propagation Delay @ 5V, 50pF	10.1 ns
Trigger Type	Positive Edge
Current - Output High, Low	8 mA, 8 mA
Voltage - Supply	2V ~ 5.5V
Current - Quiescent (Iq)	4 µA
Input Capacitance	4 pF
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74VHC374MTC are classified based on electrical and mechanical compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Type: D-Type Flip-Flop, 1 Element, 8 Bits per Element
Output Type: Tri-State, Non-Inverted
Trigger Type: Positive Edge
Clock Frequency: 120 MHz minimum
Max Propagation Delay: 10.1 ns or better @ 5V, 50pF
Current Output: 8 mA (High and Low)
Voltage Supply Range: 2V ~ 5.5V
Package: 20-TSSOP surface mount
Operating Temperature: -40°C ~ 85°C minimum

Direct Substitutes maintain identical electrical specifications and 20-TSSOP packaging, enabling pin-for-pin replacement without circuit modification.

Upgrade Substitutes offer enhanced performance or extended operating temperature ranges while maintaining functional and electrical compatibility.

Similar Substitutes share core functionality but may differ in package dimensions (20-SSOP vs. 20-TSSOP) or voltage supply ranges, requiring board-level evaluation.

Parameter Comparison

Parameter	74VHC374MTC (onsemi)	SN74AHC374PW (TI)	SN74AHC374PWR (TI)	74AHC374PW,118 (Nexperia)	SN74AHC374DBR (TI)	SN74AHCT374PWR (TI)
Series	74VHC	74AHC	74AHC	74AHC	74AHC	74AHCT
Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type
Number of Bits	8	8	8	8	8	8
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	120 MHz	120 MHz	120 MHz	120 MHz	120 MHz	130 MHz
Max Propagation Delay @ 5V, 50pF	10.1 ns	10.1 ns	6.9 ns	10.1 ns	6.9 ns	10.4 ns
Current - Output High, Low	8 mA, 8 mA	8 mA, 8 mA	8 mA, 8 mA	8 mA, 8 mA	8 mA, 8 mA	8 mA, 8 mA
Voltage - Supply	2V ~ 5.5V	2V ~ 5.5V	2V ~ 5.5V	2V ~ 5.5V	2V ~ 5.5V	4.5V ~ 5.5V
Current - Quiescent (Iq)	4 µA	4 µA	4 µA	4 µA	4 µA	4 µA
Input Capacitance	4 pF	4 pF	4 pF	3 pF	4 pF	4 pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-SSOP	20-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Discontinued at DiGi Electronics	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (Pin-for-Pin Compatible):

SN74AHC374PWR (Texas Instruments) is the primary recommended direct substitute. This part maintains identical electrical specifications to the 74VHC374MTC, including 10.1 ns maximum propagation delay at 5V with 50pF load, 2V to 5.5V supply voltage range, and 20-TSSOP packaging. The SN74AHC374PWR is currently in active production status with 13,046 units in stock, ensuring supply continuity. ROHS3 compliance and MSL 1 rating match the original specification.

SN74AHC374PW (Texas Instruments) provides equivalent functionality in tube packaging with identical electrical parameters. This part is discontinued at DiGi Electronics but remains available through alternative distribution channels with 2,100 units in stock.

74AHC374PW,118 (Nexperia USA Inc.) offers an upgrade path with extended operating temperature range (-40°C to 125°C) while maintaining all core electrical specifications. This part is active in production with 806 units available. The slightly lower input capacitance (3 pF vs. 4 pF) is within acceptable tolerance for standard applications.

Similar Substitutes (Functional Compatibility with Package Variation):

SN74AHC374DBR (Texas Instruments) provides superior propagation delay performance (6.9 ns vs. 10.1 ns) but uses 20-SSOP packaging (0.209" width vs. 0.173" for TSSOP). This package difference requires PCB layout evaluation and is not suitable for direct board replacement without redesign. The part is active with 3,400 units in stock.

SN74AHCT374PWR (Texas Instruments) operates within a restricted supply voltage range (4.5V to 5.5V vs. 2V to 5.5V) and is suitable only for applications with fixed 5V supplies. This part offers higher clock frequency (130 MHz) and is active in production with 3,521 units available.

Product Status Considerations:

The 74VHC374MTC obsolescence status necessitates transition to active production parts. SN74AHC374PWR is the optimal choice for new designs and production continuity due to active status, adequate inventory, and full electrical compatibility. For applications requiring extended temperature operation, 74AHC374PW,118 provides a qualified upgrade path.

Frequently Asked Questions (FAQ)

Q: Can SN74AHC374PWR replace 74VHC374MTC directly on the PCB?

A: Yes. SN74AHC374PWR is a direct pin-for-pin substitute with identical electrical specifications, 20-TSSOP package dimensions, and functional characteristics. No circuit modifications are required.

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

A: Both series are CMOS logic families with compatible electrical specifications for this 8-bit flip-flop function. The 74AHC series (Advanced High-Speed CMOS) and 74VHC series (Very High-Speed CMOS) share the same propagation delay, output current, and supply voltage range for this device. The primary difference is manufacturer and product lifecycle status.

Q: Why is SN74AHC374DBR listed as similar rather than direct substitute?

A: SN74AHC374DBR uses 20-SSOP packaging (0.209" width) instead of 20-TSSOP (0.173" width). While electrically compatible and offering faster propagation delay (6.9 ns), the different package footprint requires PCB redesign and is not suitable for direct board replacement.

Q: Can I use SN74AHCT374PWR in a 2V to 3.3V application?

A: No. SN74AHCT374PWR operates only within 4.5V to 5.5V supply voltage range, making it unsuitable for low-voltage applications. Use SN74AHC374PWR or 74AHC374PW,118 for 2V to 5.5V operation.

Q: What is the advantage of 74AHC374PW,118 over SN74AHC374PWR?

A: 74AHC374PW,118 extends the operating temperature range to -40°C to 125°C, compared to -40°C to 85°C for SN74AHC374PWR. This upgrade is beneficial for industrial and automotive applications requiring higher temperature operation. Electrical specifications remain equivalent.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original 74VHC374MTC specification.

Q: Which substitute offers the best propagation delay performance?

A: SN74AHC374DBR and SN74AHC374PWR both provide 6.9 ns maximum propagation delay at 5V with 50pF load, compared to 10.1 ns for the original 74VHC374MTC. However, SN74AHC374DBR requires package redesign due to different footprint dimensions.

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