SN74LVC74APWRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC74APWRG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-TSSOP surface mount package. This device provides two independent D-type flip-flops with Set (Preset) and Reset functions, operating at clock frequencies up to 150 MHz with complementary outputs. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74LVC74APWRG4
Manufacturer	Texas Instruments
Series	74LVC
Type	D-Type Flip-Flop, 2 Element, 1 Bit
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Clock Frequency	150 MHz
Max Propagation Delay @ 3.3V, 50pF	5.2 ns
Voltage - Supply	1.65V ~ 3.6V
Current - Output High / Low	24 mA / 24 mA
Current - Quiescent (Iq)	10 µA
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC74APWRG4 is determined by the following critical parameters:

Primary Substitution Criteria:

Package type: 14-TSSOP (0.173", 4.40mm Width)
Function: Dual D-type flip-flop with Set/Reset
Number of elements: 2
Number of bits per element: 1
Output type: Complementary
Trigger type: Positive Edge
Clock frequency: 150 MHz minimum
Mounting type: Surface Mount

Secondary Compatibility Parameters:

Voltage supply range (must encompass or match the original)
Propagation delay (must not exceed original specifications)
Output current capability (24 mA minimum for both high and low)
Operating temperature range
Quiescent current (10 µA maximum)
Input capacitance tolerance

Substitutes are grouped into three categories based on electrical equivalence and manufacturer recommendation status: parametric equivalents (identical electrical specifications), direct equivalents (functionally compatible with minor parameter variations), and manufacturer-recommended alternatives (approved cross-references).

Parameter Comparison

Parameter	SN74LVC74APWRG4 (Main)	SN74LVC74APWR	SN74LVC74APWT	MC74LCX74DTR2G	74LCX74MTCX	74LVC74APW,118	MC74LCX74DTG
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	Fairchild Semiconductor	NXP Semiconductors	onsemi
Series	74LVC	74LVC	74LVC	74LCX	74LCX	74LVC	74LCX
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Clock Frequency	150 MHz	150 MHz	150 MHz	150 MHz	150 MHz	150 MHz	150 MHz
Max Propagation Delay @ 3.3V, 50pF	5.2 ns	5.2 ns	5.2 ns	7 ns	7 ns	5.2 ns	7 ns
Voltage - Supply	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V	1.2V ~ 3.6V	2V ~ 3.6V
Current - Output High / Low	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA
Current - Quiescent (Iq)	10 µA	10 µA	10 µA	10 µA	10 µA	10 µA	10 µA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Input Capacitance	5 pF	5 pF	5 pF	7 pF	7 pF	4 pF	7 pF
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Tier 1 - Parametric Equivalents (Recommended Primary Substitutes):

SN74LVC74APWR and SN74LVC74APWT are direct parametric equivalents manufactured by Texas Instruments. Both maintain identical electrical specifications to the SN74LVC74APWRG4, including 5.2 ns propagation delay, 1.65V ~ 3.6V supply voltage range, and -40°C ~ 125°C operating temperature. The difference between these two is packaging format: SN74LVC74APWR is supplied in Cut Tape (CT) & Digi-Reel format with 5200 units in stock, while SN74LVC74APWT is supplied in Tape & Reel (TR) format with 2496 units in stock. Both are ROHS3 compliant with MSL 1 rating and active product status.

Tier 2 - Manufacturer-Recommended Alternatives:

74LVC74APW,118 (NXP Semiconductors) is a manufacturer-recommended substitute with identical 74LVC series specifications and 5.2 ns propagation delay. This part offers the widest supply voltage range (1.2V ~ 3.6V) and lowest input capacitance (4 pF) among all substitutes, with 56,962 units in stock. It maintains -40°C ~ 125°C operating temperature and is ROHS3 compliant.

Tier 3 - Functional Equivalents with Parameter Variations:

MC74LCX74DTR2G and MC74LCX74DTG (onsemi) and 74LCX74MTCX (Fairchild Semiconductor) are functionally equivalent but operate in the 74LCX series with 7 ns propagation delay (1.8 ns slower than the original). These parts have a reduced supply voltage range (2V ~ 3.6V, excluding the 1.65V lower limit) and reduced operating temperature range (-40°C ~ 85°C, 40°C narrower than the original). These substitutes are suitable only for applications where the reduced propagation delay, narrower voltage range, and temperature range are acceptable.

Selection Criteria:

For direct replacement in existing designs without modification, select from Tier 1 (SN74LVC74APWR or SN74LVC74APWT). For applications requiring extended supply voltage range or lowest input capacitance, 74LVC74APW,118 is suitable. Tier 3 alternatives require design review to confirm compatibility with the reduced operating temperature range and supply voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can I use MC74LCX74DTR2G as a direct replacement for SN74LVC74APWRG4?

A: MC74LCX74DTR2G is functionally compatible but not a direct replacement. The 74LCX series has 7 ns propagation delay versus 5.2 ns for the original 74LVC series. Additionally, the supply voltage range is 2V ~ 3.6V (versus 1.65V ~ 3.6V), and the operating temperature range is -40°C ~ 85°C (versus -40°C ~ 125°C). Use this substitute only if your application can tolerate these parameter differences.

Q: What is the difference between SN74LVC74APWR and SN74LVC74APWT?

A: Both parts are parametrically identical. The difference is packaging format: SN74LVC74APWR is supplied in Cut Tape (CT) & Digi-Reel format, while SN74LVC74APWT is supplied in Tape & Reel (TR) format. Select based on your assembly process requirements and available inventory.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitutes are ROHS3 compliant. 74LCX74MTCX (Fairchild Semiconductor) does not specify RoHS status in the provided data. Verify RoHS compliance with the manufacturer if this is a requirement for your application.

Q: Does the 14-TSSOP package remain the same across all substitutes?

A: Yes. All listed substitutes use the 14-TSSOP (0.173", 4.40mm Width) package, ensuring mechanical and electrical pin compatibility. No PCB layout modifications are required for package compatibility.

Q: Which substitute has the best availability?

A: 74LVC74APW,118 (NXP Semiconductors) has the highest inventory with 56,962 units in stock. SN74LVC74APWR (Texas Instruments) has 5200 units available. For time-sensitive applications, verify current stock levels with your supplier.

Q: Can I use 74LVC74APW,118 in applications requiring operation below 1.2V?

A: No. 74LVC74APW,118 has a minimum supply voltage of 1.2V, while the original SN74LVC74APWRG4 operates down to 1.65V. If your application requires operation between 1.2V and 1.65V, use SN74LVC74APWR or SN74LVC74APWT instead.

Q: What is the MSL (Moisture Sensitivity Level) rating for all substitutes?

A: All substitutes with specified MSL ratings are rated MSL 1 (Unlimited), matching the original part. This indicates minimal moisture sensitivity and no special storage or handling requirements.

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