DM74LS169AN Equivalent & Substitute Parts

Part Overview

The DM74LS169AN is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-DIP package. This component functions as a synchronous up/down counter with a maximum count rate of 25 MHz, designed for digital logic applications requiring precise counting operations. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

DM74LS169AN

onsemiIn Stock: 9558DM74LS169AN Datasheet

Current PartRFQ

SN74LS169BN

Texas InstrumentsIn Stock: 2811SN74LS169BN Datasheet

DirectRFQ

SN74LS191N

Texas InstrumentsIn Stock: 13547SN74LS191N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DM74LS169AN is determined by strict alignment across the following critical parameters: logic type (binary counter), bit width (4-bit), directional capability (up/down), timing architecture (synchronous), count rate (25 MHz minimum), trigger mechanism (positive edge), supply voltage range (4.75 V ~ 5.25 V), operating temperature range (0°C ~ 70°C), and physical package format (16-DIP through-hole). All identified substitutes maintain identical electrical and mechanical specifications across these parameters, ensuring functional interchangeability within the original circuit design.

Parameter Comparison

Engineering Selection Recommendations

Both SN74LS169BN and SN74LS191N from Texas Instruments serve as direct functional equivalents to the obsolete DM74LS169AN. The SN74LS169BN represents a direct manufacturer substitution, maintaining identical part nomenclature conventions while offering active product status and ROHS3 compliance. The SN74LS191N functions as a parametric equivalent, delivering identical electrical performance and physical form factor with equivalent compliance certifications. Selection between these alternatives should prioritize availability and supply chain continuity, as both parts satisfy all electrical and mechanical requirements for seamless integration into existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can SN74LS169BN and SN74LS191N be used interchangeably with DM74LS169AN?

A: Yes. Both parts maintain identical electrical specifications across all critical parameters including bit width, count rate, supply voltage, operating temperature range, and package format. Pin-to-pin compatibility is assured for direct socket substitution.

Q: What is the difference between SN74LS169BN and SN74LS191N?

A: Both parts are parametrically equivalent with identical functional specifications. The primary distinction lies in base product numbering (74LS169 versus 74LS191), though both deliver equivalent 4-bit synchronous up/down counter performance at 25 MHz.

Q: Are there compliance differences between the substitute parts?

A: Both Texas Instruments substitutes carry ROHS3 compliance certification, whereas the original DM74LS169AN is RoHS non-compliant. This represents an improvement in environmental compliance for new implementations.

Q: Is the 16-DIP through-hole package format maintained across all parts?

A: Yes. All three parts utilize identical 16-DIP (0.300", 7.62mm) through-hole packaging, ensuring mechanical compatibility with existing PCB layouts and socket configurations.

Q: What supply voltage range applies to these counter ICs?

A: All parts operate within the 4.75 V to 5.25 V supply voltage range, maintaining compatibility with standard TTL logic supply systems.