SN74LVC32ADTG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC32ADTG4 is a 4-channel 2-input OR gate logic IC manufactured by Texas Instruments, housed in a 14-SOIC surface mount package. This part operates across a supply voltage range of 1.65V to 3.6V with low quiescent current and is compliant with RoHS3 and REACH standards. The SN74LVC32ADTG4 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers with identical or compatible electrical and mechanical specifications, enabling continued system design and production without functional compromise.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	1.65V ~ 3.6V
Current - Quiescent (Max)	1 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 @ 3.3V, 50pF	3.6ns
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC32ADTG4 are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Parametric Equivalents (Identical Electrical Specifications):

Same logic type (4-channel 2-input OR gate)
Identical supply voltage range (1.65V ~ 3.6V)
Identical quiescent current (1 µA maximum)
Identical output current ratings (24mA high, 24mA low)
Identical input logic levels (0.7V ~ 0.8V low, 1.7V ~ 2V high)
Identical propagation delay (3.6ns @ 3.3V, 50pF)
Identical operating temperature range (-40°C ~ 125°C)
14-SOIC package compatibility

Functional Equivalents (Compatible with Design Constraints):

Same logic type and circuit configuration
Supply voltage range encompasses or matches the main part
Output current ratings meet or exceed requirements
Propagation delay within acceptable design margins
Operating temperature range covers or exceeds requirements
14-SOIC or 14-SO package compatibility

Cross-Manufacturer Alternatives (Different Series):

74LCX series parts with compatible electrical performance
Slightly different quiescent current or propagation delay specifications
Reduced operating temperature range in some variants
Maintained package compatibility

Parameter Comparison

Part Number	Manufacturer	Series	Voltage - Supply	Current - Quiescent (Max)	Propagation Delay @ 3.3V, 50pF	Operating Temperature	Package	Product Status
SN74LVC32ADTG4	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns	-40°C ~ 125°C	14-SOIC	Discontinued
SN74LVC32ADR	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns	-40°C ~ 125°C	14-SOIC	Active
SN74LVC32ADT	Texas Instruments	74LVC	1.65V ~ 3.6V	1 µA	3.6ns	-40°C ~ 125°C	14-SOIC	Active
74LCX32M	Fairchild Semiconductor	74LCX	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	14-SOIC	Active
74LVC32AD,112	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	40 µA	3.8ns	-40°C ~ 125°C	14-SO	Obsolete
74LVC32AD,118	Nexperia USA Inc.	74LVC	1.2V ~ 3.6V	40 µA	3.8ns	-40°C ~ 125°C	14-SO	Active
74LVC32AS14-13	Diodes Incorporated	74LVC	1.65V ~ 3.6V	40 µA	4.1ns	-40°C ~ 125°C	14-SO	Active
MC74LCX32DR2G	onsemi	74LCX	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 85°C	14-SOIC	Active

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Choices):

SN74LVC32ADR and SN74LVC32ADT from Texas Instruments are direct parametric equivalents to the SN74LVC32ADTG4. Both parts maintain identical electrical specifications including supply voltage range, quiescent current, propagation delay, and operating temperature. Both are currently in active production status. The primary difference is packaging format: SN74LVC32ADR is supplied in Cut Tape and Digi-Reel format, while SN74LVC32ADT is supplied in Tape & Reel format. Selection between these two depends on procurement and assembly requirements.

Nexperia 74LVC32 Variants (Compatible with Design Margin Consideration):

74LVC32AD,118 from Nexperia USA Inc. is in active production and offers extended supply voltage range (1.2V ~ 3.6V) compared to the main part. Quiescent current is higher at 40 µA maximum versus 1 µA, and propagation delay is slightly increased to 3.8ns. This part is suitable for designs with relaxed timing requirements and where lower supply voltage operation is beneficial. The 14-SO package is mechanically compatible with 14-SOIC footprints in most applications.

74LVC32AD,112 from Nexperia is obsolete and should not be selected for new designs despite electrical compatibility.

Cross-Manufacturer 74LCX Series (Conditional Substitution):

74LCX32M (Fairchild Semiconductor) and MC74LCX32DR2G (onsemi) are functionally compatible alternatives from the 74LCX series. Both operate at 2V ~ 3.6V supply voltage, have 10 µA quiescent current, and 5.5ns propagation delay at 3.3V with 50pF load. Operating temperature range is reduced to -40°C ~ 85°C. These parts are suitable for designs where the reduced temperature range and slightly increased propagation delay are acceptable. Both are in active production.

Diodes Incorporated Alternative:

74LVC32AS14-13 from Diodes Incorporated provides 4-channel 2-input OR gate functionality in 14-SO package with 1.65V ~ 3.6V supply range and -40°C ~ 125°C operating temperature matching the main part. Quiescent current is 40 µA and propagation delay is 4.1ns. This part is in active production with high inventory availability (53,280 pcs).

Compliance and Certification:

All recommended active parts maintain RoHS3 compliance and REACH unaffected status consistent with the main part. Moisture sensitivity level is 1 (Unlimited) for all variants, indicating no special handling requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC32ADR or SN74LVC32ADT be used as direct replacements for SN74LVC32ADTG4?

A: Yes. Both parts are parametric equivalents with identical electrical specifications. The only differences are packaging format (Cut Tape/Digi-Reel versus Tape & Reel) and active production status. PCB footprint and electrical performance are identical.

Q: What is the difference between 14-SOIC and 14-SO packages?

A: Both are surface mount packages with identical pin pitch and footprint dimensions (0.154" width, 3.90mm). The designations reflect different manufacturing standards but are mechanically and electrically interchangeable in most applications.

Q: Why do Nexperia parts have higher quiescent current (40 µA) compared to the main part (1 µA)?

A: Quiescent current variation reflects different manufacturing processes and design approaches between manufacturers. The 40 µA specification remains within acceptable limits for most applications and does not affect functional compatibility. Designs with strict power consumption requirements should verify this parameter against system specifications.

Q: Can 74LCX series parts (74LCX32M, MC74LCX32DR2G) be used as substitutes?

A: Yes, with design margin consideration. 74LCX parts have identical logic function and output current ratings but operate at 2V ~ 3.6V (versus 1.65V ~ 3.6V), have higher quiescent current (10 µA), slightly increased propagation delay (5.5ns versus 3.6ns), and reduced operating temperature range (-40°C ~ 85°C). These parts are suitable for designs where these parameter differences are acceptable.

Q: What is the recommended substitute for new designs?

A: SN74LVC32ADT (Texas Instruments, 74LVC series, active production) is the recommended primary choice. It provides identical electrical specifications and active production status. SN74LVC32ADR is an equivalent alternative if Cut Tape packaging is preferred.

Q: Are there inventory considerations for part selection?

A: Yes. SN74LVC32ADT has 1,778 pcs in stock, SN74LVC32ADR has 2,499 pcs, and 74LVC32AS14-13 has 53,280 pcs available. Inventory levels may influence procurement decisions for high-volume applications.

Q: Do all substitute parts have the same RoHS and REACH compliance?

A: All recommended active parts maintain RoHS3 compliance and REACH unaffected status. Moisture sensitivity level is 1 (Unlimited) for all variants, indicating identical handling requirements.

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