SN74AS109ADRG4 Equivalent & Substitute Parts

Part Overview

The SN74AS109ADRG4 is a dual JK-type flip-flop logic integrated circuit manufactured by Texas Instruments in the 74AS series. This device features 2 elements with 1 bit per element, positive edge triggering, and complementary outputs. The part is classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Substiute Parts

SN74AS109ADRG4

Texas InstrumentsIn Stock: 776SN74AS109ADRG4 Datasheet

Current PartRFQ

SN74AS109AD

Texas InstrumentsIn Stock: 1211SN74AS109AD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AS109ADRG4 is determined by strict equivalence across the following critical parameters:

• Base product number (74AS109)
• Functional architecture (dual JK-type flip-flop, 2 elements, 1 bit per element)
• Output configuration (complementary outputs)
• Electrical specifications (clock frequency, propagation delay, voltage supply, output current ratings)
• Trigger mechanism (positive edge)
• Package type (16-SOIC surface mount)
• Compliance certifications (RoHS3, REACH status)

The SN74AS109AD qualifies as a direct substitute based on identical electrical and mechanical parameters. The primary distinction is product status: SN74AS109ADRG4 is obsolete, while SN74AS109AD is active.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS109AD is the appropriate substitute for the obsolete SN74AS109ADRG4. Both parts maintain identical electrical performance, timing characteristics, and mechanical compatibility. The SN74AS109AD carries active product status, ensuring continued availability and manufacturing support from Texas Instruments.

Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement. The 16-SOIC surface mount package remains consistent, eliminating PCB layout modifications.

Frequently Asked Questions (FAQ)

Q: Can SN74AS109AD replace SN74AS109ADRG4 in existing designs?

A: Yes. The SN74AS109AD is electrically and mechanically equivalent. All electrical parameters, timing specifications, and package dimensions are identical. No circuit modifications are required.

Q: What is the difference between SN74AS109ADRG4 and SN74AS109AD?

A: The primary difference is product status. SN74AS109ADRG4 is obsolete, while SN74AS109AD is active. The packaging differs (ADRG4 uses tape and reel; AD uses tube), but electrical specifications are identical.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected. Regulatory compliance is equivalent.

Q: Does the 16-SOIC package remain the same?

A: Yes. Both parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package. PCB footprints and land patterns are identical.

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

A: Both parts operate across 0°C to 70°C. Temperature specifications are identical.

Q: Are there inventory considerations when switching to the substitute?

A: SN74AS109AD is actively manufactured and stocked. SN74AS109ADRG4 is obsolete with limited remaining inventory. Transition to SN74AS109AD is recommended for new procurement.