74VCX32MTC OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74VCX32MTC is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-TSSOP surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The 74VCX32MTC operates across a 1.2V to 3.6V supply voltage range with low quiescent current and standard TTL-compatible logic levels, serving as a fundamental building block in digital logic applications.

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-TSSOP (0.173", 4.40mm Width)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 74VCX32MTC is determined by the following critical parameters:

Logic Function: All substitute parts must implement 4-channel 2-input OR gate functionality
Circuit Count & Input Configuration: 4 circuits with 2 inputs per circuit
Supply Voltage Compatibility: Operating voltage range must encompass or overlap with 1.2V ~ 3.6V
Output Drive Capability: Output current specifications (24mA high/low) must be met or exceeded
Logic Level Thresholds: Input logic levels must be compatible with TTL/CMOS standards
Propagation Delay: Maximum delay specifications must support timing requirements
Operating Temperature Range: -40°C ~ 85°C industrial temperature range
Package Compatibility: 14-TSSOP surface mount package with identical pinout

The 74ALVC32 series from NXP and Texas Instruments meets all substitution criteria. These active-status alternatives provide improved specifications including lower quiescent current and faster propagation delays while maintaining full functional and electrical compatibility.

Parameter Comparison

Parameter	74VCX32MTC (onsemi)	74ALVC32PW,118 (NXP)	SN74ALVC32DGVR (TI)	SN74ALVC32PW (TI)	SN74ALVC32PWR (TI)
Manufacturer	onsemi	NXP USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	OR Gate	OR Gate	OR Gate	OR Gate	OR Gate
Number of Circuits	4	4	4	4	4
Number of Inputs	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
Current - Quiescent (Max)	20 µA	10 µA	10 µA	10 µA	10 µA
Current - Output High, Low	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
Input Logic Level - High	1.6V ~ 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
Operating Temperature	-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
Package / Case	14-TSSOP	14-TSSOP	14-TVSOP	14-TSSOP	14-TSSOP
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

All four substitute parts are functionally equivalent to the 74VCX32MTC and are classified as active products with current manufacturing support. Selection among substitutes should be based on the following factors:

Package Compatibility: The SN74ALVC32DGVR uses 14-TVSOP packaging, which differs from the 14-TSSOP standard. The 74ALVC32PW,118, SN74ALVC32PW, and SN74ALVC32PWR all use 14-TSSOP packaging, providing direct footprint compatibility with existing designs.

Supply Voltage Range: The 74VCX32MTC supports operation down to 1.2V, while all 74ALVC32 substitutes operate from 1.65V minimum. Applications requiring sub-1.65V operation cannot use these substitutes.

Compliance & Certifications: The Texas Instruments parts (SN74ALVC32DGVR, SN74ALVC32PW, SN74ALVC32PWR) carry RoHS3 compliance certification. All parts maintain REACH unaffected status and EAR99 export classification.

Quiescent Current: The 74ALVC32 series offers 50% lower quiescent current (10 µA vs. 20 µA), providing power consumption benefits in battery-powered or low-power applications.

Propagation Delay Performance: The NXP 74ALVC32PW,118 achieves 2ns propagation delay at 50pF load, superior to the 2.8ns specification of the original part, supporting higher-speed logic operations.

Frequently Asked Questions (FAQ)

Q: Can the 74ALVC32 series directly replace the 74VCX32MTC in existing designs?

A: Yes, provided the application operates within the 1.65V to 3.6V supply voltage range. The 74ALVC32 series maintains identical logic function, pin configuration, and output drive capability. The 14-TSSOP package variants (74ALVC32PW,118, SN74ALVC32PW, SN74ALVC32PWR) provide direct footprint compatibility.

Q: What is the difference between 14-TSSOP and 14-TVSOP packaging?

A: Both are 14-pin surface mount packages with 0.173" width and 4.40mm body width. TSSOP denotes Thin Shrink Small Outline Package, while TVSOP denotes Thin Very Small Outline Package. These are distinct package outlines with different lead configurations and PCB footprints. The SN74ALVC32DGVR in 14-TVSOP requires a different footprint than the TSSOP variants.

Q: Are there supply voltage limitations when substituting?

A: Yes. The original 74VCX32MTC operates from 1.2V to 3.6V. All 74ALVC32 substitutes have a minimum supply voltage of 1.65V. Applications requiring operation below 1.65V cannot use these substitutes and require alternative logic gate solutions.

Q: What are the packaging options for the 74ALVC32 substitute?

A: The 74ALVC32PW,118 is supplied in Bulk packaging. The SN74ALVC32DGVR is supplied in Tape & Reel (TR) format. The SN74ALVC32PW is supplied in Tube packaging. The SN74ALVC32PWR is supplied in Tape & Reel (TR) format. Selection depends on production volume requirements and inventory management practices.

Q: Do all substitute parts meet industrial temperature specifications?

A: Yes. All four substitute parts operate across the -40°C to 85°C industrial temperature range, matching the original 74VCX32MTC specification.

Q: What is the impact of lower quiescent current in the 74ALVC32 series?

A: The 74ALVC32 series draws 10 µA maximum quiescent current compared to 20 µA for the 74VCX32MTC. This 50% reduction benefits power-sensitive applications, particularly in battery-powered systems or designs with high component density where cumulative standby current becomes significant.

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