SN74HC74PW Equivalent & Substitute Parts

Part Overview

The SN74HC74PW is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments in a 14-TSSOP surface mount package. This device provides two independent D-type flip-flops with Set and Reset functions, operating across a 2V to 6V supply voltage range with a maximum clock frequency of 60 MHz. The SN74HC74PW is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Type	D-Type Flip-Flop, Dual Element
Number of Elements	2
Number of Bits per Element	1
Output Type	Complementary
Trigger Type	Positive Edge
Function	Set (Preset) and Reset
Clock Frequency	60 MHz
Max Propagation Delay @ 6V, 50pF	30 ns
Voltage Supply Range	2V to 6V
Current Output High/Low	5.2 mA / 5.2 mA
Quiescent Current (Iq)	4 µA
Input Capacitance	3 pF
Operating Temperature Range	-40°C to 85°C
Package	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74HC74PW are classified based on strict electrical and mechanical compatibility criteria. All substitute candidates must meet the following requirements:

Core Compatibility Parameters:

Functional type: Dual D-type flip-flop with Set/Reset capability
Output configuration: Complementary outputs
Trigger mechanism: Positive edge triggered
Package: 14-TSSOP surface mount form factor
Supply voltage range: Minimum 2V to 6V overlap
Pin count and pinout: 14-pin TSSOP configuration

Substitution Categories:

Direct Substitutes (Identical Electrical Performance): Parts meeting all core parameters with equivalent or superior clock frequency, propagation delay, and operating temperature specifications within the 14-TSSOP package.

Compatible Substitutes (Functional Equivalence): Parts with identical functional architecture and package but with variations in clock frequency, propagation delay, or quiescent current that remain within acceptable operating margins for standard logic applications.

Upgrade Substitutes (Enhanced Performance): Parts offering improved specifications such as higher clock frequency, lower propagation delay, or extended temperature range while maintaining backward compatibility.

Parameter Comparison

Part Number	Manufacturer	Clock Frequency (MHz)	Max Propagation Delay @ 6V, 50pF (ns)	Voltage Supply (V)	Iq (µA)	Operating Temp (°C)	Product Status	Package
SN74HC74PW	Texas Instruments	60	30	2–6	4	-40 to 85	Discontinued	14-TSSOP
SN74HC74PWR	Texas Instruments	60	30	2–6	4	-40 to 85	Active	14-TSSOP
MC74HC74ADTR2G	onsemi	35	17	2–6	2	-55 to 125	Active	14-TSSOP
74HC74PW,118	NXP USA Inc.	82	37	2–6	40	-40 to 125	Active	14-TSSOP
74HC74PW-Q100,118	Nexperia USA Inc.	82	37	2–6	40	-40 to 125	Active	14-TSSOP
74VHC74MTCX	Fairchild Semiconductor	115	9.3	2–5.5	2	-40 to 85	Active	14-TSSOP
MM74HC74AMTC	onsemi	94	19	2–6	4	-40 to 85	Active	14-TSSOP
MM74HC74AMTCX	onsemi	94	19	2–6	4	-40 to 85	Active	14-TSSOP
NLV74HC74ADTR2G	onsemi	35	17	2–6	2	-55 to 125	Obsolete	14-TSSOP

Engineering Selection Recommendations

Primary Recommendation: SN74HC74PWR

The SN74HC74PWR from Texas Instruments is the direct functional equivalent of the discontinued SN74HC74PW. It maintains identical electrical specifications including 60 MHz clock frequency, 30 ns propagation delay, and 2V to 6V supply voltage range. The part is currently in active production status with substantial inventory availability (210,400 units). Both parts share the same 14-TSSOP package and are ROHS3 compliant with MSL 1 rating. This substitution requires no circuit redesign or validation.

Secondary Recommendation: MC74HC74ADTR2G (onsemi)

The MC74HC74ADTR2G provides functional compatibility with enhanced specifications for extended temperature applications. It operates across -55°C to 125°C, exceeding the original -40°C to 85°C range. The part features lower quiescent current (2 µA versus 4 µA) and faster propagation delay (17 ns versus 30 ns). Clock frequency is reduced to 35 MHz, which remains suitable for standard logic timing applications. This part is active in production with 19,885 units in stock.

Performance Upgrade Option: MM74HC74AMTC / MM74HC74AMTCX (onsemi)

These onsemi variants offer improved performance with 94 MHz clock frequency and 19 ns propagation delay while maintaining the original 2V to 6V supply range and -40°C to 85°C operating temperature. Quiescent current remains at 4 µA. Both parts are active in production. The AMTCX variant is supplied in Cut Tape & Digi-Reel packaging, while AMTC is supplied in Tube packaging.

High-Performance Alternative: 74VHC74MTCX (Fairchild Semiconductor)

The 74VHC74MTCX represents the highest performance option with 115 MHz clock frequency and 9.3 ns propagation delay. Supply voltage range is 2V to 5.5V (slightly reduced upper limit). This part is suitable for timing-critical applications requiring superior speed performance. It is currently active in production with 20,505 units available.

Automotive-Grade Option: 74HC74PW-Q100,118 (Nexperia USA Inc.)

For applications requiring automotive qualification, the 74HC74PW-Q100,118 provides AEC-Q100 certification with active product status. It features 82 MHz clock frequency and 37 ns propagation delay across -40°C to 125°C operating range. This part is supplied in Tape & Reel packaging with 13,212 units in stock.

Parts to Avoid:

The NLV74HC74ADTR2G is marked as Obsolete and should not be selected for new designs despite technical compatibility.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74HC74PW with SN74HC74PWR without circuit modification?

A: Yes. The SN74HC74PWR is the direct active production equivalent with identical electrical specifications, package, and pinout. No circuit redesign is required.

Q: What is the difference between the various onsemi 74HC74 variants?

A: onsemi offers multiple packaging and performance options. MC74HC74ADTR2G provides extended temperature range (-55°C to 125°C) with lower quiescent current. MM74HC74AMTC and MM74HC74AMTCX offer higher clock frequency (94 MHz) and faster propagation delay (19 ns) in Tube and Cut Tape packaging respectively. All maintain 2V to 6V supply compatibility.

Q: Is the 74VHC74MTCX a suitable replacement?

A: The 74VHC74MTCX is functionally compatible and offers superior speed performance (115 MHz, 9.3 ns propagation delay). However, the supply voltage upper limit is reduced to 5.5V versus 6V. Verify your circuit operates within this range before substitution.

Q: What does the "Q100" designation in 74HC74PW-Q100,118 indicate?

A: The Q100 designation indicates AEC-Q100 automotive qualification. This part is suitable for automotive applications requiring formal qualification documentation and extended temperature operation (-40°C to 125°C).

Q: Can I use parts with different clock frequencies interchangeably?

A: Clock frequency specifications indicate maximum operating speed. Parts with lower clock frequency ratings (such as MC74HC74ADTR2G at 35 MHz) can be used in applications operating below their rated frequency. Verify your circuit timing requirements do not exceed the substitute part's clock frequency specification.

Q: What is the significance of the 14-TSSOP package specification?

A: The 14-TSSOP (Thin Shrink Small Outline Package) is a surface mount package with 0.173" width and 4.40mm body width. All listed substitutes use this identical package, ensuring mechanical and electrical compatibility with existing PCB layouts and solder reflow processes.

Q: Are all listed parts RoHS compliant?

A: Most listed parts are ROHS3 compliant. Verify specific RoHS status in the part datasheet if compliance documentation is required for your application. The NLV74HC74ADTR2G (Obsolete) and 74VHC74MTCX do not list explicit RoHS status in provided specifications.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. Parts with this rating can be stored and handled under standard conditions without special moisture control procedures.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message