SN74AC74NG4 Equivalent & Substitute Parts

Part Overview

The SN74AC74NG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-DIP through-hole package. This device provides two independent D-type flip-flops with set and reset functionality, operating at clock frequencies up to 160 MHz with complementary outputs. The SN74AC74NG4 is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

SN74AC74NG4

Texas InstrumentsIn Stock: 959SN74AC74NG4 Datasheet

Current PartRFQ

SN74AC74N

Texas InstrumentsIn Stock: 1342SN74AC74N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AC74NG4 is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• D-type flip-flop architecture with dual elements
• Complementary output configuration
• Positive edge trigger mechanism
• Set (Preset) and Reset functionality

Electrical Parameters:

• Clock frequency: 160 MHz
• Propagation delay: 10 ns @ 5V, 50pF
• Supply voltage range: 2V to 6V
• Output drive capability: 24 mA high and low
• Quiescent current: 2 µA

Physical Parameters:

• 14-DIP through-hole package (0.300", 7.62mm pitch)
• Pin-for-pin compatibility required

Compliance Parameters:

• ROHS3 compliance
• REACH unaffected status
• EAR99 export classification

The SN74AC74N qualifies as a direct substitute based on identical functional, electrical, and physical specifications within the 74AC series logic family.

Parameter Comparison

Engineering Selection Recommendations

The SN74AC74N is the direct equivalent substitute for the SN74AC74NG4. Both devices are manufactured by Texas Instruments within the 74AC logic series and maintain identical electrical, functional, and physical specifications. The primary distinction is product status: the SN74AC74NG4 is discontinued, while the SN74AC74N remains in active production.

For new designs or component replenishment, the SN74AC74N should be selected. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The through-hole 14-DIP package format is identical, permitting direct board-level substitution without layout modifications. Supply chain availability favors the SN74AC74N, with 1293 units in stock compared to the discontinued status of the original part number.

Frequently Asked Questions (FAQ)

Q: Can the SN74AC74N directly replace the SN74AC74NG4 in existing designs?

A: Yes. The SN74AC74N is a direct pin-for-pin equivalent with identical electrical specifications, package dimensions, and functional characteristics. No circuit modifications are required.

Q: What is the difference between SN74AC74NG4 and SN74AC74N?

A: The primary difference is packaging format and product status. The SN74AC74NG4 uses a green packaging variant and is discontinued. The SN74AC74N uses standard tube packaging and remains in active production. All electrical and functional parameters are identical.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Regulatory requirements are equivalent.

Q: Can I use the SN74AC74N in applications originally designed for the SN74AC74NG4?

A: Yes. The identical supply voltage range (2V to 6V), clock frequency (160 MHz), propagation delay (10 ns), and output drive capability (24 mA) ensure functional compatibility in all applications.

Q: What is the operating temperature range for both parts?

A: Both the SN74AC74NG4 and SN74AC74N operate across -40°C to 85°C, suitable for industrial and commercial temperature environments.

Q: Are there packaging considerations when switching from SN74AC74NG4 to SN74AC74N?

A: Both parts use identical 14-DIP (0.300", 7.62mm) through-hole packages. No PCB layout or socket modifications are necessary.