DM74ALS109AM Equivalent & Substitute Parts

Part Overview

The DM74ALS109AM is a dual JK-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 16-SOIC surface mount package. This device implements two independent 1-bit JK flip-flops with complementary outputs, set/preset and reset functions, and positive edge triggering. The DM74ALS109AM is classified as obsolete, making identification of functionally equivalent active alternatives necessary for new designs and production continuity.

Substiute Parts

DM74ALS109AM

onsemiIn Stock: 3582DM74ALS109AM Datasheet

Current PartRFQ

SN74ALS109AD

Texas InstrumentsIn Stock: 2143SN74ALS109AD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS109AM is determined by strict equivalence across the following critical parameters:

• Functional type: JK-type flip-flop with 2 elements, 1 bit per element
• Package: 16-SOIC (0.154", 3.90mm Width) surface mount
• Electrical specifications: 34 MHz clock frequency, 18ns propagation delay @ 5V/50pF, complementary outputs
• Supply voltage: 4.5V ~ 5.5V
• Output characteristics: 400µA high, 8mA low
• Trigger mechanism: Positive edge
• Quiescent current: 4 mA
• Operating temperature range: 0°C ~ 70°C

The SN74ALS109AD from Texas Instruments meets all these criteria and is classified as an active product, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS109AD is the direct equivalent for the DM74ALS109AM. Both devices are REACH Unaffected and classified under ECCN EAR99. The SN74ALS109AD carries RoHS3 compliance, whereas the DM74ALS109AM does not specify RoHS status. For new designs and production applications requiring active component support, the SN74ALS109AD is the appropriate selection. The DM74ALS109AM's obsolete status limits availability and manufacturer support, making transition to the active SN74ALS109AD necessary for long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS109AD replace the DM74ALS109AM in existing designs?

A: Yes. Both devices are electrically and mechanically identical across all specified parameters, including package, pin configuration, timing characteristics, and supply voltage requirements. Direct substitution is possible without circuit modification.

Q: Are there differences in compliance or certifications between these parts?

A: Both parts are REACH Unaffected and EAR99 classified. The SN74ALS109AD includes RoHS3 compliance certification, which may be required for certain applications or markets.

Q: What is the significance of the DM74ALS109AM being obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. This limits future availability and manufacturer technical support. The SN74ALS109AD, being active, ensures ongoing availability and support from Texas Instruments.

Q: Are the 16-SOIC packages identical between manufacturers?

A: Yes. Both the DM74ALS109AM and SN74ALS109AD use the 16-SOIC (0.154", 3.90mm Width) package with identical pin assignments and mechanical dimensions, enabling direct PCB compatibility.

Q: What are the key electrical parameters that define substitution for this device?

A: The critical parameters are: 34 MHz clock frequency, 18ns maximum propagation delay at 5V with 50pF load, 4.5V to 5.5V supply voltage, positive edge triggering, complementary outputs, and 4 mA quiescent current. All these parameters are identical between the two parts.