DM74ALS174SJX Equivalent & Substitute Parts

Part Overview

The DM74ALS174SJX is a D-Type flip-flop logic integrated circuit featuring 1 element with 6-bit configuration, designed for positive edge triggering applications. Manufactured by onsemi in a 16-SOIC package, this component operates at 50 MHz clock frequency with 17ns maximum propagation delay. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications requiring this logic function.

Substiute Parts

DM74ALS174SJX

onsemiIn Stock: 1251DM74ALS174SJX Datasheet

Current PartRFQ

SN74ALS174NSR

Texas InstrumentsIn Stock: 3442SN74ALS174NSR Datasheet

DirectRFQ

SN74ALS174D

Texas InstrumentsIn Stock: 2640SN74ALS174D Datasheet

SimilarRFQ

SN74ALS174DR

Texas InstrumentsIn Stock: 5717SN74ALS174DR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DM74ALS174SJX is determined by strict equivalence across the following critical parameters:

• Logic Function: D-Type flip-flop with 1 element, 6-bit configuration
• Electrical Performance: 50 MHz clock frequency, 17ns propagation delay @ 5V/50pF
• Trigger Characteristics: Positive edge triggering with non-inverted output
• Power Supply: 4.5V ~ 5.5V operating range
• Output Characteristics: 400µA high current, 8mA low current
• Quiescent Current: 19 mA
• Temperature Range: 0°C ~ 70°C
• Mounting: Surface mount configuration
• Package Type: 16-SOIC form factor

All substitute parts listed maintain identical electrical specifications and functional behavior. Package width variations (0.209" vs 0.154") represent different SOIC pitch standards but remain mechanically compatible within 16-SOIC classification.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74ALS174DR (Texas Instruments)

The SN74ALS174DR is the preferred substitute for the obsolete DM74ALS174SJX. This part maintains active product status with full ROHS3 compliance and unlimited moisture sensitivity rating. Texas Instruments' active manufacturing status ensures long-term availability and supply chain stability. The 16-SOIC (0.154", 3.90mm) package variant is standard in current production and widely supported by PCB assembly services.

Secondary Recommendation: SN74ALS174NSR (Texas Instruments)

The SN74ALS174NSR provides an alternative with identical electrical specifications and active product status. This variant features the 16-SOIC (0.209", 5.30mm) package width, matching the original DM74ALS174SJX footprint more closely. Selection of this part may reduce PCB layout modifications if the original design utilized the wider SOIC pitch.

Tertiary Option: SN74ALS174D (Texas Instruments)

The SN74ALS174D carries Last Time Buy status, indicating limited future availability. This part should be selected only when existing inventory requirements or design constraints necessitate the 16-SOIC (0.154", 3.90mm) package variant and supply chain alternatives are exhausted.

All three Texas Instruments substitutes are ROHS3 compliant and maintain identical electrical performance specifications to the original onsemi part.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS174NSR and SN74ALS174DR be used interchangeably with DM74ALS174SJX?

A: Yes. Both parts maintain identical electrical specifications, functional behavior, and 16-SOIC package classification. The difference in package width (0.209" vs 0.154") represents pitch variation within the SOIC standard and does not affect electrical compatibility. PCB footprint verification is required to confirm mechanical fit.

Q: What is the difference between the 16-SOIC (0.209", 5.30mm) and 16-SOIC (0.154", 3.90mm) packages?

A: Both are 16-pin SOIC packages with identical pin count and electrical characteristics. The width difference reflects different lead pitch standards. The 0.209" variant uses wider lead spacing, while the 0.154" variant uses narrower spacing. PCB design files must specify the correct package variant to ensure proper component placement and soldering.

Q: Why is the DM74ALS174SJX listed as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. Texas Instruments continues manufacturing equivalent 74ALS174 variants, providing continuity for this logic function across active product lines.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitutes (SN74ALS174NSR, SN74ALS174D, SN74ALS174DR) carry ROHS3 compliance certification. The original onsemi part does not specify RoHS status.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: All parts, including the original and substitutes, carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: Which substitute should I select for new designs?

A: SN74ALS174DR is recommended for new designs due to active product status, ROHS3 compliance, and standard 16-SOIC (0.154", 3.90mm) package configuration. This ensures maximum supply chain availability and compatibility with modern PCB assembly processes.