74VCX32MTCX Equivalent & Substitute Parts

Part Overview

The 74VCX32MTCX is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-TSSOP surface mount packaging. This part operates across a 1.2V to 3.6V supply voltage range with a maximum propagation delay of 2.8ns at 3.3V with 30pF load. The 74VCX32MTCX is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

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)

Substitute Part Grouping Explanation

Substitution of the 74VCX32MTCX is determined by the following critical parameters:

Logic Function: All substitute parts must implement 4-channel 2-input OR gate functionality
Package Type: Physical compatibility requires 14-TSSOP or equivalent 14-pin surface mount packages
Supply Voltage Range: Substitute parts must support operation within the 1.2V to 3.6V range or a compatible subset
Output Drive Capability: Output current specifications (24mA high and low) must be met or exceeded
Propagation Delay: Timing performance must not exceed the original 2.8ns specification at 3.3V
Operating Temperature: Full -40°C to 85°C range support required
Input Logic Levels: Compatible threshold voltages for low and high logic states

The 74ALVC32 series from both NXP USA Inc. and Texas Instruments meets these substitution criteria. These parts maintain identical logic functionality, package footprint, and thermal operating range while offering improved specifications in quiescent current and propagation delay performance.

Parameter Comparison

Parameter	74VCX32MTCX (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 74VCX32MTCX and meet the core electrical and mechanical requirements for direct substitution. Selection among these alternatives should be based on the following factors:

Supply Voltage Consideration: The 74VCX32MTCX 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.

Product Status: All substitute parts carry Active product status, ensuring long-term availability and manufacturing support. The 74VCX32MTCX obsolete status necessitates migration to one of these alternatives for new designs.

Compliance and Certifications: The Texas Instruments parts (SN74ALVC32DGVR, SN74ALVC32PW, SN74ALVC32PWR) carry RoHS3 compliance certification. The NXP 74ALVC32PW,118 does not list RoHS status in the provided data.

Package Compatibility: The SN74ALVC32DGVR uses 14-TVSOP packaging, which differs from the 14-TSSOP standard. Verify PCB footprint compatibility before selection. The remaining substitutes use standard 14-TSSOP packaging, providing direct footprint compatibility.

Packaging Format: Choose based on procurement requirements: NXP 74ALVC32PW,118 (Bulk), Texas Instruments SN74ALVC32PW (Tube), or Texas Instruments SN74ALVC32DGVR and SN74ALVC32PWR (Tape & Reel).

Frequently Asked Questions (FAQ)

Q: Can the 74ALVC32 series directly replace the 74VCX32MTCX in all applications?

A: Direct replacement is possible for applications operating at 1.65V or higher. The 74VCX32MTCX supports 1.2V minimum supply voltage, while 74ALVC32 parts require 1.65V minimum. Verify your circuit's minimum supply voltage before substitution.

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 (Thin Shrink Small Outline Package) and TVSOP (Thin Very Small Outline Package) have identical footprints and are mechanically compatible. Confirm with your PCB design files and component placement equipment.

Q: Are the Texas Instruments and NXP parts interchangeable?

A: Yes, all substitute parts meet identical electrical specifications for logic function, output drive, propagation delay, and operating temperature. Selection depends on packaging format preference, compliance requirements, and supply chain availability.

Q: Why do the 74ALVC32 substitutes show lower quiescent current than the original 74VCX32MTCX?

A: The 74ALVC32 series represents a newer technology generation with improved power efficiency. The 10 µA maximum quiescent current versus 20 µA in the original part provides reduced standby power consumption without affecting functional compatibility.

Q: Which substitute part should I select for new designs?

A: For new designs, select from the active Texas Instruments or NXP parts based on packaging requirements and supply chain preferences. All meet current industry compliance standards and offer long-term manufacturing support.

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