74VCX32MX OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74VCX32MX 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 production continuity. The 74VCX32MX operates across a supply voltage range of 1.2V to 3.6V with low quiescent current consumption of 20 µA maximum, suitable for low-power logic applications requiring fast propagation delays.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	1.2V ~ 3.6V
Current - Quiescent (Max)	20 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.7V ~ 0.8V
Input Logic Level - High	1.6V ~ 2V
Max Propagation Delay @ 3.3V, 30pF	2.8ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74VCX32MX is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain identical logic function (4-channel 2-input OR gate), circuit count, and input configuration.

Package Compatibility: All substitutes use 14-pin SOIC surface mount packaging with 3.90mm width, ensuring direct PCB footprint compatibility.

Electrical Compatibility: Substitute parts operate within overlapping supply voltage ranges (1.65V ~ 3.6V minimum for all substitutes), support identical output current ratings (24mA), and maintain compatible input logic thresholds. All substitutes meet or exceed the propagation delay specification at 3.3V supply voltage.

Operating Conditions: All substitutes support the full -40°C to 85°C temperature range required for industrial applications.

Environmental Compliance: All substitutes maintain MSL 1 rating and REACH compliance status.

Parameter Comparison

Parameter	74VCX32MX (onsemi)	74ALVC32D,118 (Nexperia)	74ALVC32D-Q100J (Nexperia)	SN74ALVC32D (TI)	SN74ALVC32DR (TI)	SN74ALVC32NSR (TI)
Logic Type	OR Gate	OR Gate	OR Gate	OR Gate	OR Gate	OR Gate
Number of Circuits	4	4	4	4	4	4
Number of Inputs	2	2	2	2	2	2
Voltage - Supply	1.2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Current - Quiescent (Max)	20 µA	10 µA	10 µA	10 µA	10 µA	10 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V	0.7V ~ 0.8V
Input Logic Level - High	1.6V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V	1.7V ~ 2V
Max Propagation Delay @ 3.3V	2.8ns @ 30pF	2ns @ 50pF	2.8ns @ 50pF	2.8ns @ 50pF	2.8ns @ 50pF	2.8ns @ 50pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.209", 5.30mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Recommended): SN74ALVC32D, SN74ALVC32DR, and SN74ALVC32NSR from Texas Instruments are active production parts with ROHS3 compliance and full inventory availability. These parts provide direct functional and electrical equivalence with improved quiescent current performance (10 µA vs. 20 µA).

Automotive-Grade Alternative: 74ALVC32D-Q100J from Nexperia is qualified to AEC-Q100 automotive standards, suitable for applications requiring automotive-grade components. This part maintains identical electrical specifications to other 74ALVC32 variants.

Nexperia Options: 74ALVC32D,118 and 74ALVC32D-Q100J provide Nexperia sourcing alternatives with ROHS3 compliance and active product status.

Package Consideration: SN74ALVC32NSR uses a 14-SO package with 5.30mm width, differing from the standard 3.90mm width of other substitutes. Verify PCB footprint compatibility before selection.

Supply Voltage Limitation: All 74ALVC32 substitutes operate from 1.65V minimum supply voltage, compared to the 74VCX32MX minimum of 1.2V. Applications requiring operation below 1.65V cannot use these substitutes.

Frequently Asked Questions (FAQ)

Q: Can the 74ALVC32 series directly replace the 74VCX32MX?

A: Yes, for applications operating at 1.65V or higher supply voltage. All 74ALVC32 variants maintain identical logic function, pin configuration, and package footprint. The primary difference is the minimum supply voltage specification (1.65V vs. 1.2V for the original part).

Q: What is the difference between the various 74ALVC32 part numbers?

A: The core 74ALVC32 logic function is identical across all variants. Differences exist in packaging format (Tube, Cut Tape, Tape & Reel), manufacturer (Texas Instruments vs. Nexperia), and qualification level (74ALVC32D-Q100J includes AEC-Q100 automotive qualification). Electrical specifications remain consistent.

Q: Is SN74ALVC32NSR compatible with standard 14-SOIC PCB footprints?

A: SN74ALVC32NSR uses a 14-SO package with 5.30mm width, while most substitutes use 3.90mm width 14-SOIC packages. Verify your PCB footprint specifications before selecting this part. The pin pitch and lead configuration remain compatible, but the package body width differs.

Q: What are the quiescent current advantages of the 74ALVC32 substitutes?

A: All 74ALVC32 variants consume 10 µA maximum quiescent current, compared to 20 µA for the 74VCX32MX. This 50% reduction in standby current consumption benefits low-power and battery-operated applications.

Q: Are all substitute parts RoHS compliant?

A: Yes, all active 74ALVC32 substitutes are ROHS3 compliant. The original 74VCX32MX RoHS status was not specified in available documentation.

Q: Which substitute offers the best availability?

A: SN74ALVC32NSR from Texas Instruments shows the highest inventory level at 5,140 pieces. SN74ALVC32D and SN74ALVC32DR also maintain substantial stock levels (2,154 and 2,100 pieces respectively).

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