SN74LS73ADRG4 Equivalent & Substitute Parts

Part Overview

The SN74LS73ADRG4 is a dual JK-type flip-flop logic integrated circuit manufactured by Texas Instruments in the 74LS series. This device functions as a master reset element with complementary outputs, designed for negative edge-triggered applications. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The SN74LS73ADRG4 operates within a 4.75V to 5.25V supply voltage range and is housed in a 14-SOIC surface mount package.

Substiute Parts

SN74LS73ADRG4

Texas InstrumentsIn Stock: 750SN74LS73ADRG4 Datasheet

Current PartRFQ

SN74LS73ADR

Texas InstrumentsIn Stock: 6595SN74LS73ADR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS73ADRG4 is determined by strict equivalence across the following critical parameters:

• Base Product Number: Must be 74LS73 to ensure identical logic function and pin configuration
• Type: Must be JK Type flip-flop with identical element count (2) and bit configuration (1 bit per element)
• Output Configuration: Must provide complementary outputs with negative edge triggering
• Electrical Specifications: Clock frequency (45 MHz), propagation delay (20ns @ 5V, 15pF), supply voltage (4.75V ~ 5.25V), and output current ratings (400µA, 8mA) must match exactly
• Package: Must be 14-SOIC surface mount with identical physical dimensions (0.154", 3.90mm Width)
• Compliance: Must maintain ROHS3 compliance and MSL Level 1 rating

The primary distinction between the main part and its substitute lies in packaging format and product status, not in electrical or functional characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS73ADR is the direct functional equivalent of the SN74LS73ADRG4. Both parts share identical electrical specifications, logic function, and physical package dimensions. The substitute part maintains full ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

The primary distinction is product status: the SN74LS73ADRG4 is discontinued, while the SN74LS73ADR remains in active production with significantly higher inventory availability (6543 units versus 707 units). The packaging format differs—the main part is supplied in tube format while the substitute is supplied in Tape & Reel (TR) format—but this does not affect electrical performance or board-level compatibility.

Selection of the SN74LS73ADR is appropriate for applications requiring the 74LS73 dual JK-type flip-flop function where component availability and supply chain continuity are considerations.

Frequently Asked Questions (FAQ)

Q: Are the SN74LS73ADRG4 and SN74LS73ADR electrically identical?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, including clock frequency (45 MHz), propagation delay (20ns @ 5V, 15pF), supply voltage range (4.75V ~ 5.25V), and output current ratings (400µA, 8mA). They perform the same logic function as dual JK-type flip-flops with complementary outputs and negative edge triggering.

Q: What is the difference between these two parts?

A: The differences are non-functional. The SN74LS73ADRG4 is discontinued and supplied in tube packaging, while the SN74LS73ADR is active and supplied in Tape & Reel (TR) format. Both use the 14-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width).

Q: Can I use the SN74LS73ADR as a direct replacement on my PCB?

A: Yes. The SN74LS73ADR is a direct pin-for-pin and functionally equivalent replacement. The 14-SOIC package dimensions are identical, and all electrical characteristics match the original specification. No circuit modifications are required.

Q: Are both parts RoHS compliant?

A: Yes. Both the SN74LS73ADRG4 and SN74LS73ADR are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). Both maintain REACH unaffected status and EAR99 export classification.

Q: Why would I choose the SN74LS73ADR over the SN74LS73ADRG4?

A: The SN74LS73ADR is the practical choice because it is in active production with higher inventory availability. The SN74LS73ADRG4 is discontinued, making the substitute the recommended option for new designs and ongoing production requirements.

Q: Do these parts require different handling or storage procedures?

A: No. Both parts share identical Moisture Sensitivity Level 1 (Unlimited) ratings, meaning they do not require special moisture control during storage or handling. Standard ESD precautions for surface mount logic devices apply to both.