74LCX32MTC OR Gate IC Equivalent & Substitute Parts

Part Overview

The 74LCX32MTC is a 4-channel 2-input OR gate logic IC manufactured by onsemi in 14-TSSOP surface mount packaging. This part is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 74LCX32 series provides low-voltage CMOS logic functionality with supply voltage range of 2V to 3.6V, suitable for applications requiring low power consumption and compact form factors.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	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 @ V, Max CL	5.5ns @ 3.3V, 50pF
Operating Temperature	-40°C ~ 85°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LCX32MTC is determined by the following critical parameters:

Logic function: 4-channel 2-input OR gate
Package type: 14-TSSOP surface mount
Supply voltage compatibility: Minimum 2V operation
Output drive capability: 24mA minimum
Propagation delay: 5.5ns or faster at 3.3V, 50pF load
Operating temperature range: Minimum -40°C to 85°C coverage
RoHS3 compliance and MSL Level 1 rating

Substitute parts are classified into two categories:

Direct Substitutes maintain identical electrical specifications and packaging, enabling pin-for-pin replacement without circuit modification.

Similar Substitutes provide equivalent logic functionality and package compatibility but may feature enhanced specifications (lower quiescent current, faster propagation delay, extended temperature range, or active product status). These parts require verification of electrical parameter compatibility within the application circuit.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Current - Quiescent (Max)	Max Propagation Delay @ 3.3V, 50pF	Operating Temperature	Package / Case	Packaging Type
74LCX32MTC	onsemi	Obsolete	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	14-TSSOP	Tube
NLV74LCX32DTR2G	onsemi	Obsolete	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	14-TSSOP	Tape & Reel (TR)
74LVC32AT14-13	Diodes Incorporated	Active	1.65V ~ 3.6V	40 µA	4.1ns	-40°C ~ 125°C	14-TSSOP	Tape & Reel (TR)
74LVC32ADB,118	Nexperia USA Inc.	Obsolete	1.2V ~ 3.6V	40 µA	3.8ns	-40°C ~ 125°C	14-SSOP	Cut Tape (CT) & Digi-Reel®
74LVC32APW,112	Nexperia USA Inc.	Obsolete	1.2V ~ 3.6V	40 µA	5ns	-40°C ~ 125°C	14-TSSOP	Tube
74LVC32APW,118	Nexperia USA Inc.	Active	1.2V ~ 3.6V	40 µA	5ns	-40°C ~ 125°C	14-TSSOP	Tape & Reel (TR)
SN74LVC32ADB	Texas Instruments	Active	Not specified	Not specified	Not specified	Not specified	14-SSOP	Bulk
SN74LVC32ADBR	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	3.6ns	-40°C ~ 125°C	14-SSOP	Cut Tape (CT) & Digi-Reel®
SN74LVC32AMPWREP	Texas Instruments	Active	2V ~ 3.6V	10 µA	3.8ns	-55°C ~ 125°C	14-TSSOP	Tape & Reel (TR)
SN74LVC32APW	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	3.6ns	-40°C ~ 125°C	14-TSSOP	Tube
SN74LVC32APWR	Texas Instruments	Active	1.65V ~ 3.6V	1 µA	3.6ns	-40°C ~ 125°C	14-TSSOP	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

Direct Substitution (Identical Specifications):

NLV74LCX32DTR2G from onsemi provides direct electrical and functional equivalence to 74LCX32MTC. Both parts maintain identical supply voltage range (2V ~ 3.6V), quiescent current (10 µA), and propagation delay (5.5ns @ 3.3V, 50pF). The primary difference is packaging format: NLV74LCX32DTR2G is supplied in Tape & Reel format versus Tube packaging for the original part. Both are classified as obsolete products.

Active Product Alternatives with Enhanced Specifications:

SN74LVC32AMPWREP (Texas Instruments) offers the closest match to original specifications while maintaining active product status. This part preserves the 2V ~ 3.6V supply voltage range and 10 µA quiescent current of the 74LCX32MTC, with improved propagation delay (3.8ns versus 5.5ns) and extended operating temperature range (-55°C ~ 125°C). Package and pin configuration remain compatible at 14-TSSOP.

SN74LVC32APWR and SN74LVC32APW (Texas Instruments) provide active alternatives with enhanced performance characteristics: lower quiescent current (1 µA), faster propagation delay (3.6ns), and extended temperature range (-40°C ~ 125°C). These parts require verification that the lower supply voltage minimum (1.65V versus 2V) and reduced quiescent current specifications are compatible with the application circuit.

74LVC32APW,118 (Nexperia USA Inc.) is an active product offering similar performance enhancements with 14-TSSOP packaging and Tape & Reel availability. This part maintains compatibility with the original package footprint.

Package Consideration:

Parts specified as 14-SSOP (SN74LVC32ADBR, 74LVC32ADB,118) feature slightly different package dimensions (0.209" width versus 0.173" for TSSOP) and require PCB layout verification before implementation.

Frequently Asked Questions (FAQ)

Q: Can I use 74LVC32APW,118 as a direct replacement for 74LCX32MTC?

A: 74LVC32APW,118 provides functional and pin-compatible substitution with identical 4-channel 2-input OR gate logic and 14-TSSOP packaging. However, the supply voltage minimum differs (1.2V for 74LVC32APW,118 versus 2V for 74LCX32MTC). Verify that your circuit design accommodates this specification difference. The part is active and available in production quantities.

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

A: Both are surface mount packages with 14 pins, but differ in physical dimensions. 14-TSSOP measures 0.173" width, while 14-SSOP measures 0.209" width. PCB footprints are not interchangeable without layout modification. Verify your PCB design accommodates the selected package before ordering.

Q: Why does SN74LVC32ADBR show 1 µA quiescent current while 74LCX32MTC specifies 10 µA?

A: SN74LVC32ADBR represents an enhanced design generation with improved power efficiency. The lower quiescent current (1 µA) is a specification improvement and does not affect functional compatibility. This part is suitable for applications where reduced standby power consumption is beneficial.

Q: Is SN74LVC32AMPWREP compatible with circuits designed for -40°C to 85°C operation?

A: Yes. SN74LVC32AMPWREP specifies -55°C to 125°C operating range, which encompasses the original -40°C to 85°C requirement. The extended temperature range provides additional design margin and is fully compatible with applications requiring the narrower temperature window.

Q: Which substitute part offers the best availability?

A: SN74LVC32APWR (Texas Instruments) shows the highest inventory level at 29,300 pieces in stock. This part is active, offers enhanced electrical specifications, and maintains 14-TSSOP packaging compatibility with the original design.

Q: Can I mix different manufacturers' parts in the same production run?

A: All substitute parts listed maintain identical logic function, pin configuration, and 14-TSSOP package compatibility. Parts from different manufacturers (onsemi, Diodes Incorporated, Nexperia, Texas Instruments) are electrically interchangeable within the specified parameter ranges. Verify that your quality and traceability requirements permit multi-source procurement before implementation.

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