MM74HC74AMTCX Equivalent & Substitute Parts

Part Overview

The MM74HC74AMTCX is a dual D-type flip-flop logic integrated circuit manufactured by onsemi in 14-TSSOP surface mount packaging. This device functions as a 2-element D-type flip-flop with complementary outputs, set/preset and reset capabilities, and positive edge triggering. The part is currently active in production with 1,552 units in stock.

Substitute parts are necessary when the MM74HC74AMTCX becomes unavailable, when alternative packaging formats are required for specific PCB layouts, or when extended operating temperature ranges or automotive qualifications are needed for particular applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MM74HC74AMTCX
Manufacturer	onsemi
Base Product Number	74HC74
Category	Logic
Type	D-Type Flip-Flop
Number of Elements	2
Number of Bits per Element	1
Output Type	Complementary
Function	Set(Preset) and Reset
Trigger Type	Positive Edge
Clock Frequency	94 MHz
Max Propagation Delay @ 6V, 50pF	19 ns
Voltage - Supply	2V ~ 6V
Current - Output High, Low	5.2 mA, 5.2 mA
Current - Quiescent (Iq)	4 µA
Input Capacitance	5 pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Supplier Device Package	14-TSSOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC74AMTCX is determined by the following critical parameters:

Core Functional Parameters (Must Match):

Base product number: 74HC74
Type: D-Type flip-flop
Number of elements: 2
Number of bits per element: 1
Output type: Complementary
Function: Set(Preset) and Reset
Trigger type: Positive edge

Electrical Parameters (Must Be Compatible):

Voltage supply range must encompass or match 2V ~ 6V
Clock frequency must be equal to or greater than 94 MHz
Propagation delay must be equal to or less than 19 ns @ 6V, 50pF
Output current capability must be equal to or greater than 5.2 mA
Operating temperature range must encompass -40°C ~ 85°C

Physical Parameters (Flexible):

Package format may differ (14-TSSOP, 14-SOIC, 14-SSOP acceptable)
Packaging type may differ (Cut Tape, Tape & Reel, Tube acceptable)

Substitute parts are grouped into two categories: direct equivalents matching all specifications, and functional equivalents with relaxed performance parameters that remain within acceptable operating margins.

Parameter Comparison

Parameter	MM74HC74AMTCX	MC74HC74ADTR2G	MM74HC74AM	74HC74PW,118	74HC74PW-Q100,118	SN74HC74DBR	SN74HC74MPWREP	SN74HC74PW	SN74HC74PWR	SN74HC74PWT	SN74HC74QPWRG4Q1
Manufacturer	onsemi	onsemi	Fairchild Semiconductor	NXP USA Inc.	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Clock Frequency	94 MHz	35 MHz	94 MHz	82 MHz	82 MHz	60 MHz	60 MHz	60 MHz	60 MHz	60 MHz	60 MHz
Max Propagation Delay @ 6V, 50pF	19 ns	17 ns	19 ns	37 ns	37 ns	30 ns	30 ns	30 ns	30 ns	30 ns	30 ns
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Output High, Low	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA
Current - Quiescent (Iq)	4 µA	2 µA	4 µA	40 µA	40 µA	4 µA	4 µA	4 µA	4 µA	4 µA	4 µA
Input Capacitance	5 pF	10 pF	5 pF	4.6 pF	4.6 pF	3 pF	3 pF	3 pF	3 pF	3 pF	3 pF
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-SOIC (0.154", 3.90mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-SSOP (0.209", 5.30mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Discontinued at DiGi Electronics	Active	Discontinued at DiGi Electronics	Active
Inventory	1,552 Pcs	19,885 Pcs	2,990 Pcs	6,710 Pcs	13,212 Pcs	5,207 Pcs	1,846 Pcs	5,690 Pcs	210,400 Pcs	3,899 Pcs	10,430 Pcs

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications):

MM74HC74AM (Fairchild Semiconductor) matches all electrical and functional specifications of the MM74HC74AMTCX. The only difference is packaging format: 14-SOIC (0.154", 3.90mm Width) versus 14-TSSOP (0.173", 4.40mm Width). This substitute is suitable when PCB layout accommodates the SOIC package footprint. Product status is active with 2,990 units in stock.

High-Performance Equivalents (Superior Specifications):

MC74HC74ADTR2G (onsemi) provides superior propagation delay performance (17 ns versus 19 ns) and extended operating temperature range (-55°C ~ 125°C). Clock frequency is reduced to 35 MHz, which remains functional for most applications but represents a performance trade-off. This part is suitable for applications requiring extended temperature operation. Inventory is 19,885 units.

Functional Equivalents (Relaxed Performance Parameters):

SN74HC74PWR (Texas Instruments) is the highest-inventory substitute with 210,400 units in stock. It maintains identical supply voltage, output current, and quiescent current specifications. Propagation delay is 30 ns (versus 19 ns), and clock frequency is 60 MHz (versus 94 MHz). This part is suitable for applications where timing margins are not critical. Product status is active.

SN74HC74QPWRG4Q1 (Texas Instruments) offers extended operating temperature range (-40°C ~ 125°C) with identical propagation delay and clock frequency specifications as SN74HC74PWR. This variant is suitable for applications requiring wider temperature operation. Product status is active with 10,430 units in stock.

74HC74PW-Q100,118 (Nexperia USA Inc.) includes automotive qualification (AEC-Q100) and extended operating temperature range (-40°C ~ 125°C). Propagation delay is 37 ns and clock frequency is 82 MHz. This part is suitable for automotive applications. Product status is active with 13,212 units in stock.

Package Format Alternatives:

SN74HC74DBR (Texas Instruments) uses 14-SSOP packaging (0.209", 5.30mm Width) instead of 14-TSSOP. All electrical specifications match the functional equivalent category. This substitute is necessary when PCB layout requires SSOP footprint. Product status is active with 5,207 units in stock.

Discontinued Parts (Not Recommended for New Designs):

SN74HC74PW and SN74HC74PWT are discontinued at DiGi Electronics and should not be selected for new designs, despite meeting functional specifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute MM74HC74AM for MM74HC74AMTCX?

A: Yes. MM74HC74AM is electrically identical with matching clock frequency (94 MHz), propagation delay (19 ns), and operating temperature range (-40°C ~ 85°C). The difference is package format: 14-SOIC versus 14-TSSOP. Substitution is valid if your PCB layout accommodates the SOIC footprint.

Q: What is the difference between 14-TSSOP, 14-SOIC, and 14-SSOP packages?

A: These are different surface mount package formats with different physical dimensions and pin layouts. 14-TSSOP measures 0.173" width, 14-SOIC measures 0.154" width, and 14-SSOP measures 0.209" width. Each requires a different PCB footprint. Substitution between packages is only valid if your PCB design accommodates the alternative footprint.

Q: Why does SN74HC74PWR have lower clock frequency (60 MHz) than MM74HC74AMTCX (94 MHz)?

A: Different manufacturers optimize their designs for different performance targets. The 60 MHz clock frequency of SN74HC74PWR is sufficient for most digital logic applications. Substitution is valid if your circuit does not require the higher 94 MHz frequency of the original part.

Q: Is MC74HC74ADTR2G a better substitute than SN74HC74PWR?

A: MC74HC74ADTR2G offers superior propagation delay (17 ns) and extended temperature range (-55°C ~ 125°C), but has lower clock frequency (35 MHz). SN74HC74PWR has higher clock frequency (60 MHz) but standard propagation delay (30 ns) and temperature range (-40°C ~ 85°C). Selection depends on your specific application requirements for timing, frequency, and temperature operation.

Q: Can I use 74HC74PW-Q100,118 in non-automotive applications?

A: Yes. The AEC-Q100 automotive qualification indicates the part meets automotive reliability standards, but it functions identically in non-automotive applications. This part is suitable for any application requiring extended temperature range (-40°C ~ 125°C) and automotive-grade reliability.

Q: What does "Discontinued at DiGi Electronics" mean for SN74HC74PW?

A: This indicates the part is no longer available through DiGi Electronics distribution, though it may be available through other channels. For new designs, select an active product status part to ensure long-term availability and supply chain stability.

Q: Are all these substitutes RoHS3 compliant?

A: Most substitutes are ROHS3 compliant. 74HC74PW,118 does not specify RoHS status. If RoHS3 compliance is required for your application, confirm compliance status with the manufacturer or distributor before selection.

Q: What is the significance of MSL (Moisture Sensitivity Level)?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and requires no special handling or storage conditions. All listed substitutes have MSL 1 rating, so moisture sensitivity is not a differentiating factor for substitution.

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