74LCX32M Equivalent & Substitute Parts

Part Overview

The 74LCX32M is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74LCX32M operates across a 2V to 3.6V supply voltage range with low quiescent current and is compliant with RoHS3 and REACH regulations.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V ~ 3.6V
Current - Quiescent (Max)	10 µA
Current - Output High/Low	24mA / 24mA
Input Logic Level - Low	0.7V ~ 0.8V
Input Logic Level - High	1.7V ~ 2V
Max Propagation Delay	5.5ns @ 3.3V, 50pF
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LCX32M is determined by strict electrical and mechanical compatibility across the following parameters:

Critical Matching Parameters:

Logic type: 4-channel 2-input OR gate
Package type: 14-SOIC surface mount
Output current capability: 24mA minimum (both high and low)
Input logic levels: 0.7V~0.8V (low), 1.7V~2V (high)
Supply voltage compatibility: Must support 2V minimum operation
Propagation delay: Maximum 5.5ns @ 3.3V, 50pF

Substitute parts are grouped into two categories:

Direct Substitutes (Electrical Equivalence): Parts meeting all electrical parameters within the 14-SOIC package form factor, including supply voltage range, logic thresholds, and propagation delay specifications.

Compatible Alternatives (Functional Equivalence): Parts with identical logic function and package footprint but with extended supply voltage ranges, improved quiescent current performance, or enhanced temperature ratings that maintain backward compatibility with the 74LCX32M application requirements.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage Supply	Quiescent Current (Max)	Propagation Delay	Operating Temp	Package	Status
74LCX32M	onsemi	74LCX	2V ~ 3.6V	10 µA	5.5ns @ 3.3V	-40°C ~ 85°C	14-SOIC	Obsolete
SN74LVC32AD	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active
SN74LVC32ADR	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active
SN74LVC32ADT	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active
SN74LVC32AMDREP	Texas Instruments	74LVC	2V ~ 3.6V	10 µA	3.8ns @ 3.3V	-55°C ~ 125°C	14-SOIC	Active
SN74LVC32AQDREP	Texas Instruments	74LVC	2V ~ 3.6V	10 µA	3.8ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active
74LVC32AD,112	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	40 µA	3.8ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Obsolete
74LVC32AD,118	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	40 µA	3.8ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active
74LVC32AD-Q100J	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	40 µA	3.8ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active
SN74LVC32ANS	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active
SN74LVC32ANSR	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns @ 3.3V	-40°C ~ 125°C	14-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Electrical Equivalent: SN74LVC32AD, SN74LVC32ADR, and SN74LVC32ADT from Texas Instruments are active production parts that provide direct functional equivalence to the 74LCX32M. These parts maintain identical logic function, output current specifications, and package footprint. The 74LVC series offers improved quiescent current performance (1 µA vs. 10 µA) and faster propagation delay (3.6ns vs. 5.5ns), with extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). All are RoHS3 compliant and REACH unaffected.

Voltage-Matched Alternative: SN74LVC32AMDREP and SN74LVC32AQDREP maintain the 2V minimum supply voltage specification matching the 74LCX32M, with identical quiescent current (10 µA). These parts are active production items with RoHS3 compliance and extended temperature ratings.

Extended Supply Voltage Options: 74LVC32AD,118 and 74LVC32AD-Q100J from Nexperia USA Inc. support extended supply voltage range (1.2V minimum) and are active production parts. The 74LVC32AD-Q100J includes AEC-Q100 automotive qualification. Both maintain RoHS3 compliance.

Obsolete Part Consideration: 74LVC32AD,112 from Nexperia USA Inc. is classified as obsolete and should not be selected for new designs despite functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC32AD as a direct replacement for 74LCX32M? A: Yes. Both parts are 4-channel 2-input OR gates in 14-SOIC packaging with identical output current specifications (24mA high/low) and compatible input logic levels. The SN74LVC32AD is an active production part with improved performance characteristics and extended temperature rating.

Q: What is the difference between the Texas Instruments 74LVC32 variants (AD, ADR, ADT, ANS, ANSR)? A: These variants differ in packaging format: AD and ADR are supplied in tube and cut tape formats respectively; ADT is tape and reel; ANS is tube; ANSR is tape and reel. All share identical electrical specifications and 14-SOIC package footprint. Selection depends on procurement and assembly requirements.

Q: Why do some substitute parts have lower minimum supply voltage (1.2V vs. 2V)? A: The Nexperia 74LVC32AD variants support extended supply voltage ranges. Applications requiring 2V minimum operation can use these parts without issue, as they operate across the full 1.2V to 3.6V range. This provides design flexibility for future applications.

Q: Is the 74LVC32AD-Q100J suitable for automotive applications? A: Yes. The 74LVC32AD-Q100J carries AEC-Q100 automotive qualification and is appropriate for automotive-grade applications. It maintains all standard electrical specifications and RoHS3 compliance.

Q: What is the significance of the propagation delay difference between 74LCX32M (5.5ns) and substitute parts (3.6ns-3.8ns)? A: Substitute parts exhibit faster propagation delay, which is a performance improvement. Applications designed for the 74LCX32M will operate correctly with faster logic gates. No timing compatibility issues arise from this improvement.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance status of the 74LCX32M.

Q: Can I mix different packaging formats (tube, tape & reel, cut tape) in the same production run? A: Packaging format selection depends on assembly equipment and procurement logistics. All variants with identical part numbers (excluding packaging designators) are electrically equivalent and can be used interchangeably in the same circuit design.

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