SN74LS74ADG4 Equivalent & Substitute Parts

Part Overview

The SN74LS74ADG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This component functions as a Set/Preset and Reset element with complementary outputs, operating at a clock frequency of 33 MHz with a maximum propagation delay of 40ns at 5V with 15pF load.

The SN74LS74ADG4 is currently discontinued at DiGi Electronics. Equivalent substitute parts are available to maintain design continuity and ensure project completion without redesign requirements.

Substiute Parts

SN74LS74ADG4

Texas InstrumentsIn Stock: 753SN74LS74ADG4 Datasheet

Current PartRFQ

SN74LS74ADR

Texas InstrumentsIn Stock: 2981SN74LS74ADR Datasheet

DirectRFQ

SN74LS74AD

Texas InstrumentsIn Stock: 2054SN74LS74AD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS74ADG4 is determined by strict equivalence across the following critical parameters:

• Logic Function: Dual D-type flip-flop with Set/Preset and Reset capability
• Output Configuration: Complementary outputs
• Electrical Performance: Clock frequency of 33 MHz, propagation delay of 40ns @ 5V with 15pF load
• Trigger Mechanism: Positive edge triggering
• Supply Voltage Range: 4.75V ~ 5.25V
• Output Drive Capability: 400µA high, 8mA low
• Package Format: 14-SOIC surface mount package with identical pinout
• Compliance: ROHS3 compliant, MSL Level 1

All substitute parts listed maintain identical electrical specifications, functional behavior, and physical package dimensions, ensuring direct replacement capability in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74LS74ADR

The SN74LS74ADR is the recommended substitute for the SN74LS74ADG4. This part maintains active product status at the manufacturer and is currently in stock. All electrical parameters, functional specifications, and package dimensions are identical. The SN74LS74ADR is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, suitable for both manual and automated assembly processes. ROHS3 compliance and MSL Level 1 rating are maintained.

Secondary Substitute: SN74LS74AD

The SN74LS74AD provides functional and electrical equivalence to the SN74LS74ADG4. This part is supplied in Tube packaging and is currently in stock. Although discontinued at DiGi Electronics, it remains available through alternative distribution channels. All electrical specifications and package dimensions match the original part exactly. ROHS3 compliance and MSL Level 1 rating are maintained.

Both substitute parts are manufactured by Texas Instruments and share the identical 74LS base product number, ensuring design compatibility and functional interchangeability.

Frequently Asked Questions (FAQ)

Q: Can SN74LS74ADR be used as a direct replacement for SN74LS74ADG4?

A: Yes. The SN74LS74ADR is electrically and functionally identical to the SN74LS74ADG4. Both parts feature the same dual D-type flip-flop configuration, 33 MHz clock frequency, 40ns propagation delay, complementary outputs, and 14-SOIC package. The pinout is identical, allowing direct substitution without circuit modification.

Q: What is the difference between SN74LS74ADR and SN74LS74AD?

A: The primary difference is packaging format. The SN74LS74ADR is supplied in Cut Tape (CT) and Digi-Reel® formats, while the SN74LS74AD is supplied in Tube packaging. All electrical specifications, functional behavior, and package dimensions are identical. Selection depends on assembly process requirements and inventory management preferences.

Q: Are all three parts ROHS3 compliant?

A: Yes. The SN74LS74ADG4, SN74LS74ADR, and SN74LS74AD are all ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

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

A: All three parts operate across the temperature range of 0°C to 70°C (TA).

Q: Can these parts be used in automated assembly processes?

A: Yes. All three parts are surface mount devices in 14-SOIC packages suitable for automated pick-and-place assembly. The SN74LS74ADR is specifically available in Digi-Reel® format, optimized for automated assembly line integration.

Q: What supply voltage is required for operation?

A: All three parts require a supply voltage range of 4.75V to 5.25V for proper operation.