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74LVC32AD,112 OR Gate IC Equivalent & Substitute Parts
Part Overview
The 74LVC32AD,112 is a 4-channel 2-input OR gate logic IC manufactured by Nexperia USA Inc. in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74LVC series operates across a wide voltage range (1.2V to 3.6V) with low quiescent current and fast propagation delay, making it suitable for low-power digital logic applications. Substitute parts must maintain functional equivalence in logic operation, pin configuration, and electrical performance within specified operating parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | OR Gate |
| Number of Circuits | 4 |
| Number of Inputs | 2 |
| Voltage Supply Range | 1.2V ~ 3.6V |
| Current - Quiescent (Max) | 40 µA |
| Current - Output High/Low | 24mA / 24mA |
| Max Propagation Delay @ 3.3V, 50pF | 3.8ns |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the 74LVC32AD,112 is determined by the following critical parameters:
Functional Requirements: All substitute parts must be 4-channel 2-input OR gates with identical logic operation and pin configuration.
Electrical Compatibility: Supply voltage range, output drive current (24mA minimum), and propagation delay must support the application requirements. The 74LVC32AD,112 operates from 1.2V to 3.6V; substitutes operating from 1.65V to 3.6V or 2V to 3.6V are acceptable for most applications operating at standard logic levels (3.3V or 5V with level shifting).
Package Compatibility: All substitutes use 14-SOIC surface mount packaging with identical pin assignments and mechanical dimensions (0.154" width, 3.90mm).
Compliance Requirements: RoHS3 compliance and MSL Level 1 (unlimited moisture sensitivity) are maintained across all substitute options.
Substitute parts are grouped into two categories based on quiescent current performance: standard 74LVC series (1 µA typical) and 74LCX series (10 µA typical). Both categories meet the functional and electrical requirements for direct substitution.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Voltage Supply | Quiescent Current (Max) | Propagation Delay @ 3.3V, 50pF | Operating Temp | Packaging |
|---|---|---|---|---|---|---|---|
| 74LVC32AD,112 | Nexperia USA Inc. | Obsolete | 1.2V ~ 3.6V | 40 µA | 3.8ns | -40°C ~ 125°C | Tube |
| SN74LVC32AD | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 3.6ns | -40°C ~ 125°C | Tube |
| SN74LVC32ADR | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 3.6ns | -40°C ~ 125°C | Cut Tape (CT) & Digi-Reel® |
| SN74LVC32ADT | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 3.6ns | -40°C ~ 125°C | Tape & Reel (TR) |
| SN74LVC32ANSR | Texas Instruments | Active | 1.65V ~ 3.6V | 1 µA | 3.6ns | -40°C ~ 125°C | Tape & Reel (TR) |
| SN74LVC32AMDREP | Texas Instruments | Active | 2V ~ 3.6V | 10 µA | 3.8ns | -55°C ~ 125°C | Cut Tape (CT) |
| SN74LVC32AQDREP | Texas Instruments | Active | 2V ~ 3.6V | 10 µA | 3.8ns | -40°C ~ 125°C | Tape & Reel (TR) |
| SN74LVC32AQDRQ1 | Texas Instruments | Active | 2V ~ 3.6V | 10 µA | 3.8ns | -40°C ~ 125°C | Tape & Reel (TR) |
| MC74LCX32DR2G | onsemi | Active | 2V ~ 3.6V | 10 µA | 5.5ns | -40°C ~ 85°C | Tape & Reel (TR) |
| 74LCX32M | Fairchild Semiconductor | Active | 2V ~ 3.6V | 10 µA | 5.5ns | -40°C ~ 85°C | Bulk |
Engineering Selection Recommendations
Primary Substitutes (Recommended): SN74LVC32AD, SN74LVC32ADR, SN74LVC32ADT, and SN74LVC32ANSR from Texas Instruments are the preferred substitutes. These parts are active products with identical electrical performance to the obsolete 74LVC32AD,112, featuring lower quiescent current (1 µA vs. 40 µA), faster propagation delay (3.6ns vs. 3.8ns), and extended voltage range support (1.65V minimum). All maintain RoHS3 compliance and MSL Level 1 rating. Selection among these variants depends on packaging requirements: tube for component-level procurement, cut tape for semi-automated assembly, or tape & reel for high-volume production.
Extended Temperature Range Option: SN74LVC32AMDREP extends the lower operating temperature to -55°C, suitable for military or extreme environment applications. This variant operates at 2V minimum supply voltage with 10 µA quiescent current.
Automotive Grade Option: SN74LVC32AQDRQ1 is qualified to AEC-Q100 automotive standards, appropriate for automotive and harsh environment applications. Operating parameters match SN74LVC32AQDREP with -40°C to 125°C temperature range.
Alternative Substitutes: MC74LCX32DR2G (onsemi) and 74LCX32M (Fairchild Semiconductor) are functionally equivalent 74LCX series parts with 10 µA quiescent current. These parts operate from 2V to 3.6V with 5.5ns propagation delay and -40°C to 85°C temperature range. Use these substitutes only when the reduced temperature range (-40°C to 85°C vs. -40°C to 125°C) and slower propagation delay are acceptable for the application.
Frequently Asked Questions (FAQ)
Q: Can I directly replace 74LVC32AD,112 with SN74LVC32AD?
A: Yes. Both parts are 4-channel 2-input OR gates in 14-SOIC packaging with identical pin configuration. SN74LVC32AD is an active product with superior electrical performance (lower quiescent current, faster propagation delay) and meets all compliance requirements of the obsolete part.
Q: What is the difference between 74LVC and 74LCX series substitutes?
A: Both are functionally equivalent OR gate ICs with identical logic operation and pin configuration. The primary differences are quiescent current (74LVC: 1 µA vs. 74LCX: 10 µA), propagation delay (74LVC: 3.6ns vs. 74LCX: 5.5ns), and operating temperature range (74LVC: -40°C to 125°C vs. 74LCX: -40°C to 85°C). Select 74LVC series for low-power applications or extended temperature requirements; select 74LCX series when cost is the primary consideration and performance margins are adequate.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL Level 1 (unlimited moisture sensitivity) rating, matching the compliance profile of the original 74LVC32AD,112.
Q: What packaging options are available for substitutes?
A: Substitute parts are available in tube, cut tape, tape & reel, and bulk packaging. Tube and cut tape are suitable for component-level or small-batch procurement. Tape & reel packaging is standard for automated assembly and high-volume production. Bulk packaging is available for the 74LCX32M variant.
Q: Can I use MC74LCX32DR2G or 74LCX32M if my application requires -40°C to 125°C operation?
A: No. These 74LCX series parts are rated only to 85°C maximum operating temperature. For applications requiring -40°C to 125°C operation, use 74LVC series substitutes (SN74LVC32AD, SN74LVC32ADR, SN74LVC32ADT, SN74LVC32ANSR, or SN74LVC32AMDREP).
Q: Is SN74LVC32AQDRQ1 suitable for non-automotive applications?
A: Yes. SN74LVC32AQDRQ1 meets AEC-Q100 automotive qualification standards but is functionally and electrically identical to other 74LVC32 variants. It can be used in any application where the electrical and temperature specifications are met. Automotive qualification does not restrict use in non-automotive designs.
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