DM74ALS32SJX Equivalent & Substitute Parts

Part Overview

The DM74ALS32SJX is a 4-channel 2-input OR gate logic IC manufactured by onsemi in a 14-SOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74ALS series provides standard logic gate functionality with TTL-compatible voltage levels and propagation characteristics suitable for digital logic applications.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Output High, Low	400µA, 8mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	14ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Base Product Number	74ALS32
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS32SJX are qualified based on the following criteria:

Electrical Parameters (Must Match):

Logic Type: OR Gate
Number of Circuits: 4
Number of Inputs: 2
Voltage - Supply: 4.5V ~ 5.5V
Current - Output High, Low: 400µA, 8mA
Input Logic Level - Low: 0.8V
Input Logic Level - High: 2V
Max Propagation Delay @ V, Max CL: 14ns @ 5V, 50pF
Operating Temperature: 0°C ~ 70°C

Mechanical Parameters (Acceptable Variations):

Mounting Type: Surface Mount (required)
Package / Case: 14-SOIC variants with different body widths (0.209" or 0.154")
Supplier Device Package: 14-SOP, 14-SOIC, or 14-SO

All substitute parts maintain identical functional and electrical specifications while differing only in packaging configuration and manufacturer sourcing.

Parameter Comparison

Parameter	DM74ALS32SJX (onsemi)	SN74ALS32D (TI)	SN74ALS32DR (TI)	SN74ALS32NSR (TI)
Logic Type	OR Gate	OR Gate	OR Gate	OR Gate
Number of Circuits	4	4	4	4
Number of Inputs	2	2	2	2
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Current - Output High, Low	400µA, 8mA	400µA, 8mA	400µA, 8mA	400µA, 8mA
Input Logic Level - Low	0.8V	0.8V	0.8V	0.8V
Input Logic Level - High	2V	2V	2V	2V
Max Propagation Delay @ V, Max CL	14ns @ 5V, 50pF	14ns @ 5V, 50pF	14ns @ 5V, 50pF	14ns @ 5V, 50pF
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	14-SOP	14-SOIC	14-SOIC	14-SO
Package / Case	14-SOIC (0.209", 5.30mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.209", 5.30mm Width)
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: SN74ALS32DR (Texas Instruments)

The SN74ALS32DR is the preferred substitute for the DM74ALS32SJX. This part maintains active product status with ROHS3 compliance and the highest inventory availability (3,793 pcs). The 14-SOIC package with 0.154" body width is a standard footprint compatible with modern PCB designs. Tape & Reel packaging supports automated assembly processes.

Secondary Recommendation: SN74ALS32NSR (Texas Instruments)

The SN74ALS32NSR provides an alternative with active product status and ROHS3 compliance. This part features the 14-SO package with 0.209" body width, matching the original DM74ALS32SJX package dimensions. Tape & Reel packaging is suitable for high-volume production.

Tertiary Option: SN74ALS32D (Texas Instruments)

The SN74ALS32D is available with Last Time Buy status and ROHS3 compliance. This part is suitable for applications where tube packaging is acceptable. The 14-SOIC package with 0.154" body width requires PCB footprint verification against the original design.

All three substitutes maintain identical electrical performance and operating characteristics. Selection should be based on PCB layout compatibility, packaging requirements, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS32DR replace DM74ALS32SJX directly?

A: Yes. Both parts are electrically identical 4-channel 2-input OR gates with matching voltage supply ranges (4.5V ~ 5.5V), output current specifications (400µA, 8mA), and propagation delay (14ns @ 5V, 50pF). The primary difference is the package body width: SN74ALS32DR uses 0.154" width versus the original 0.209" width. PCB footprint compatibility must be confirmed for your specific design.

Q: What is the difference between 14-SOP and 14-SOIC packages?

A: Both are 14-pin surface mount packages with identical pin pitch and electrical connectivity. The designation difference reflects body width variations: 14-SOP typically refers to 0.209" width, while 14-SOIC can be either 0.154" or 0.209" width. Consult the package drawing for your specific application to ensure PCB footprint compatibility.

Q: Why is the DM74ALS32SJX marked as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. Active alternatives from Texas Instruments (SN74ALS32DR and SN74ALS32NSR) provide identical functionality and are recommended for new designs and production continuity.

Q: Are all substitutes ROHS3 compliant?

A: The Texas Instruments substitutes (SN74ALS32D, SN74ALS32DR, SN74ALS32NSR) are ROHS3 compliant. The original DM74ALS32SJX is REACH Unaffected. All parts have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Which substitute has the best availability?

A: SN74ALS32DR has the highest inventory level at 3,793 pcs in stock. SN74ALS32NSR has 4,300 pcs available. Both are suitable for production requirements.

Q: Can I use SN74ALS32NSR if my PCB is designed for the original DM74ALS32SJX?

A: Yes. The SN74ALS32NSR uses the 14-SOIC package with 0.209" body width, matching the original DM74ALS32SJX dimensions. Pin configuration and electrical specifications are identical, making this a direct footprint replacement.

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