74VHC74MTCX Equivalent & Substitute Parts

Part Overview

The 74VHC74MTCX is a dual D-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 14-TSSOP surface mount package. This device functions as a 2-element D-type flip-flop with complementary outputs, positive edge triggering, and set/reset capability. The part is currently active in production with 20,505 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible logic families with enhanced performance characteristics or extended temperature ratings.

Key Parameters

Parameter	Value
Manufacturer Part Number	74VHC74MTCX
Manufacturer	onsemi
Series	74VHC
Type	D-Type Flip-Flop, 2 Element, 1 Bit per Element
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Packaging Format	Cut Tape (CT) & Digi-Reel®
Clock Frequency	115 MHz
Max Propagation Delay @ 5V, 50pF	9.3 ns
Voltage Supply Range	2V ~ 5.5V
Output Current (High/Low)	8mA / 8mA
Quiescent Current	2 µA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74VHC74MTCX are classified based on electrical compatibility and packaging format. The primary substitution criteria are:

Electrical Compatibility Parameters:

D-Type flip-flop configuration with 2 elements, 1 bit per element
Positive edge trigger mechanism
Complementary output type
Set/Reset function capability
Clock frequency of 115 MHz minimum
Maximum propagation delay of 9.3 ns at 5V, 50pF load
Output current capability of 8mA (high and low)
Voltage supply range encompassing 2V ~ 5.5V
Quiescent current of 2 µA maximum
Surface mount technology

Packaging Format Considerations:

Primary package: 14-TSSOP (0.173", 4.40mm Width)
Alternative packages: 14-SSOP, 14-TVSOP (functionally equivalent but mechanically different)
Packaging distribution: Cut Tape (CT) & Digi-Reel®, Tube, or Tape & Reel (TR)

Product Status Categories:

Direct substitutes: Active status parts with identical electrical specifications
Upgrade substitutes: Enhanced performance or extended temperature range
Similar substitutes: Different package formats with identical electrical performance

Parameter Comparison

Part Number	Manufacturer	Series	Package	Packaging Format	Clock Freq (MHz)	Prop Delay @ 5V (ns)	Voltage Supply	Output Current (mA)	Iq (µA)	Temp Range (°C)	Product Status	Inventory
74VHC74MTCX	onsemi	74VHC	14-TSSOP	Cut Tape & Digi-Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 85	Active	20,505
SN74AHC74PW	Texas Instruments	74AHC	14-TSSOP	Tube	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 125	Discontinued at DiGi Electronics	3,366
SN74AHC74PWR	Texas Instruments	74AHC	14-TSSOP	Cut Tape & Digi-Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 125	Active	119,658
74AHC74PW,118	Nexperia USA Inc.	74AHC	14-TSSOP	Cut Tape & Digi-Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 125	Active	11,674
SN74AHC74MPWREP	Texas Instruments	74AHC	14-TSSOP	Tape & Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-55 ~ 125	Last Time Buy	12,331
SN74AHC74QPWRG4Q1	Texas Instruments	74AHC	14-TSSOP	Tape & Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 125	Active	2,100
SN74AHC74QPWRQ1	Texas Instruments	74AHC	14-TSSOP	Cut Tape & Digi-Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 125	Active	4,930
SN74AHC74DBR	Texas Instruments	74AHC	14-SSOP	Tape & Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 125	Active	4,094
SN74AHC74DGVR	Texas Instruments	74AHC	14-TFSOP	Tape & Reel	115	9.3	2V ~ 5.5V	8 / 8	2	-40 ~ 125	Active	4,700
SN74AHCT74MPWREP	Texas Instruments	74AHCT	14-TSSOP	Tape & Reel	140	8.8	4.5V ~ 5.5V	8 / 8	2	-55 ~ 125	Active	1,036
SN74AHCT74QPWRG4Q1	Texas Instruments	74AHCT	14-TSSOP	Tape & Reel	140	8.8	4.5V ~ 5.5V	8 / 8	2	-40 ~ 125	Active	1,742

Engineering Selection Recommendations

Primary Direct Substitutes (Identical Electrical Performance, 14-TSSOP Package):

SN74AHC74PWR is the recommended primary substitute. This Texas Instruments part maintains identical electrical specifications to the 74VHC74MTCX with extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), active product status, and highest inventory availability (119,658 units). Both parts are ROHS3 compliant and MSL 1 rated.

74AHC74PW,118 (Nexperia USA Inc.) provides an alternative with equivalent specifications and active status, suitable for applications requiring Nexperia sourcing or supply chain diversification.

Extended Temperature Range Substitutes:

SN74AHC74MPWREP extends the operating temperature range to -55°C to 125°C, suitable for military or extreme environment applications. This part carries Last Time Buy status, indicating limited future availability.

Automotive Grade Substitutes:

SN74AHC74QPWRG4Q1 and SN74AHC74QPWRQ1 are AEC-Q100 qualified automotive-grade parts with identical electrical performance. These are appropriate for automotive applications requiring qualification documentation.

Alternative Package Formats (Same Electrical Performance):

SN74AHC74DBR (14-SSOP, 0.209" width) and SN74AHC74DGVR (14-TFSOP) maintain identical electrical specifications but differ in physical package dimensions. These are suitable only when PCB layout accommodates the different footprints.

Higher Performance Alternative (74AHCT Series):

SN74AHCT74MPWREP and SN74AHCT74QPWRG4Q1 offer improved propagation delay (8.8 ns versus 9.3 ns) and higher clock frequency (140 MHz versus 115 MHz). These parts require voltage supply limited to 4.5V ~ 5.5V and are not compatible with the 2V minimum supply of the 74VHC74MTCX. Selection requires verification that system voltage remains within 4.5V ~ 5.5V range.

Frequently Asked Questions (FAQ)

Q: Can SN74AHC74PWR be used as a direct replacement for 74VHC74MTCX?

A: Yes. Both parts are D-type dual flip-flops in 14-TSSOP packages with identical electrical specifications: 115 MHz clock frequency, 9.3 ns propagation delay at 5V/50pF, 8mA output current, and 2V ~ 5.5V supply voltage. The SN74AHC74PWR offers extended temperature range (-40°C to 125°C) and higher inventory availability.

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

A: Both series are CMOS logic families with identical functional performance for this flip-flop application. The primary difference is manufacturer (onsemi for 74VHC, Texas Instruments for 74AHC). Electrical specifications including propagation delay, output current, and supply voltage are equivalent.

Q: Can I use SN74AHCT74MPWREP instead of 74VHC74MTCX?

A: Electrical substitution is possible only if your system operates within the 4.5V ~ 5.5V supply range. The 74AHCT series does not support the 2V minimum supply voltage of the 74VHC series. If your design requires 2V operation, 74AHCT parts are not compatible.

Q: What is the significance of packaging format differences (Cut Tape vs. Tape & Reel)?

A: Packaging format affects manufacturing process compatibility. Cut Tape (CT) & Digi-Reel format is suitable for manual or semi-automatic assembly. Tape & Reel (TR) format is optimized for high-speed automated pick-and-place equipment. Selection depends on assembly process requirements, not electrical performance.

Q: Are automotive-grade parts (AEC-Q100) required for my application?

A: AEC-Q100 qualification is required only for automotive applications subject to automotive industry standards. For general industrial or consumer applications, standard-grade parts (SN74AHC74PWR) are appropriate. Automotive-grade parts carry identical electrical specifications but include additional qualification documentation and testing.

Q: What does "Last Time Buy" status mean for SN74AHC74MPWREP?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part. Existing inventory is available for purchase, but no future production is planned. For new designs, select parts with Active status (SN74AHC74PWR, 74AHC74PW,118, or SN74AHC74QPWRQ1) to ensure long-term availability.

Q: Can I substitute 14-SSOP package (SN74AHC74DBR) for 14-TSSOP (74VHC74MTCX)?

A: Electrical substitution is valid, but physical package dimensions differ. The 14-SSOP is 0.209" wide versus 14-TSSOP at 0.173" wide. PCB footprint compatibility must be verified before substitution. If the PCB is designed for 14-TSSOP, the 14-SSOP part will not fit without layout modification.

Q: What inventory levels should I consider for supply chain planning?

A: SN74AHC74PWR offers the highest inventory (119,658 units), providing supply security for high-volume production. Alternative sources include 74AHC74PW,118 (11,674 units) and SN74AHC74MPWREP (12,331 units). For critical applications, maintain qualified substitute part numbers with adequate inventory buffers.

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