DM74ALS109AMX Equivalent & Substitute Parts

Part Overview

The DM74ALS109AMX is a dual JK-type flip-flop logic integrated circuit manufactured by onsemi, housed in a 16-SOIC surface mount package. This device provides two independent 1-bit JK flip-flops with complementary outputs, set/preset and reset functions, and positive edge triggering. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning.

Substiute Parts

DM74ALS109AMX

onsemiIn Stock: 2410DM74ALS109AMX Datasheet

Current PartRFQ

SN74ALS109AD

Texas InstrumentsIn Stock: 2143SN74ALS109AD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74ALS109AMX is determined by strict equivalence across the following parameters:

• Logic family classification (74ALS)
• Device function (dual JK-type flip-flop, 1-bit per element)
• Package type and dimensions (16-SOIC, 0.154" width)
• Electrical specifications (34 MHz clock frequency, 18ns propagation delay, 4.5V–5.5V supply)
• Output configuration (complementary outputs)
• Trigger mechanism (positive edge)
• Current ratings (400µA output high, 8mA output low, 4mA quiescent)

The SN74ALS109AD from Texas Instruments meets all these criteria and qualifies as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS109AD is the appropriate substitute for the obsolete DM74ALS109AMX. Both devices are electrically and mechanically identical across all specified parameters. The SN74ALS109AD carries active product status from Texas Instruments and holds RoHS3 compliance certification, providing advantages for long-term availability and regulatory adherence. Both parts maintain REACH unaffected status and identical moisture sensitivity levels (MSL 1, unlimited). Pin-for-pin compatibility and identical package geometry ensure direct replacement without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS109AD replace the DM74ALS109AMX in existing designs?

A: Yes. The SN74ALS109AD is a direct pin-for-pin and functional equivalent. All electrical parameters, timing specifications, and package dimensions are identical. No circuit modifications are required.

Q: Are there differences in supply voltage requirements?

A: No. Both parts operate across the identical supply voltage range of 4.5V to 5.5V and draw the same quiescent current of 4 mA.

Q: Does the package type differ between these parts?

A: No. Both the DM74ALS109AMX and SN74ALS109AD use the 16-SOIC package with identical dimensions (0.154" width, 3.90mm).

Q: What is the significance of the DM74ALS109AMX being obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The SN74ALS109AD from Texas Instruments provides continued availability and active product support for this logic function.

Q: Are there compliance or certification differences?

A: The SN74ALS109AD carries RoHS3 compliance certification. Both parts maintain REACH unaffected status and identical moisture sensitivity levels. For applications requiring specific regulatory compliance, the SN74ALS109AD's active RoHS3 status may provide additional assurance.

Q: What are the propagation delay specifications?

A: Both parts specify a maximum propagation delay of 18 nanoseconds at 5V with a 50pF load, ensuring identical timing performance in digital logic circuits.