DM74123N Equivalent & Substitute Parts

Part Overview

The DM74123N is a monostable multivibrator logic IC manufactured by onsemi, housed in a 16-DIP package. This device features two independent circuits and is designed for timing and pulse generation applications in digital systems. The DM74123N is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Direct replacements from active manufacturers ensure design continuity and supply chain reliability.

Substiute Parts

DM74123N

onsemiIn Stock: 2245DM74123N Datasheet

Current PartRFQ

SN74123N

Texas InstrumentsIn Stock: 2475SN74123N Datasheet

DirectRFQ

SN74221N

Texas InstrumentsIn Stock: 4000SN74221N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74123N are qualified based on the following criteria:

Electrical Compatibility: All substitute parts maintain identical logic type (monostable multivibrator), independent circuit count (2), supply voltage range (4.75 V ~ 5.25 V), output current specifications (800µA, 16mA), and operating temperature range (0°C ~ 70°C).

Mechanical Compatibility: All substitute parts use the same 16-DIP package footprint (0.300", 7.62mm) with through-hole mounting, ensuring direct PCB compatibility without layout modifications.

Functional Parameters: Schmitt trigger input configuration remains consistent across all parts. Propagation delay variations exist among substitutes but do not affect functional interchangeability for standard monostable timing applications.

Compliance & Status: Substitute parts are sourced from active product lines with current manufacturing support and regulatory compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

SN74123N (Texas Instruments) is the primary direct substitute for the DM74123N. This part maintains all electrical and mechanical specifications while offering active product status with current manufacturing support. The 22 ns propagation delay specification provides documented timing performance. ROHS3 compliance and REACH unaffected status satisfy modern regulatory requirements.

SN74221N (Texas Instruments) serves as an alternative substitute with identical electrical and mechanical compatibility. The 40 ns propagation delay is slower than the SN74123N but remains functionally equivalent for standard monostable timing applications. This part is also ROHS3 compliant and REACH unaffected.

Selection between SN74123N and SN74221N depends on timing requirements within the application circuit. Both parts are actively manufactured and available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can SN74123N and SN74221N be used interchangeably with DM74123N?

A: Yes. Both parts are electrically and mechanically compatible. They share identical supply voltage, output current, operating temperature range, and 16-DIP package footprint. Direct socket substitution is possible without PCB modifications.

Q: What is the difference between SN74123N and SN74221N?

A: The primary difference is propagation delay: SN74123N specifies 22 ns while SN74221N specifies 40 ns. Both maintain identical electrical output characteristics and package form factor. Selection depends on timing-critical circuit requirements.

Q: Are there package alternatives to the 16-DIP form factor?

A: The provided data specifies only 16-DIP packaging for all listed parts. No alternative package options are documented for these monostable multivibrator configurations.

Q: What compliance certifications apply to the substitute parts?

A: SN74123N and SN74221N are both ROHS3 compliant and REACH unaffected. The DM74123N status for these certifications is not specified in the available data.

Q: Is the DM74123N still available for purchase?

A: The DM74123N is classified as obsolete. However, 2200 pieces are reported in current inventory. For new designs and long-term supply assurance, Texas Instruments substitutes (SN74123N or SN74221N) are recommended as they maintain active product status.