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SN74AHCT1G32DBVT Equivalent & Substitute Parts
Part Overview
The SN74AHCT1G32DBVT is a single-channel 2-input OR gate logic IC manufactured by Texas Instruments in SOT-23-5 surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates within the 4.5V to 5.5V supply voltage range and is suitable for general-purpose logic applications requiring OR gate functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | OR Gate |
| Number of Circuits | 1 |
| Number of Inputs | 2 |
| Voltage - Supply | 4.5V ~ 5.5V |
| Current - Quiescent (Max) | 1 µA |
| Current - Output High, Low | 8mA, 8mA |
| Input Logic Level - Low | 0.8V |
| Input Logic Level - High | 2V |
| Max Propagation Delay @ V, Max CL | 7.9ns @ 5V, 50pF |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the SN74AHCT1G32DBVT is determined by the following critical parameters:
- Logic function: Single-channel 2-input OR gate
- Supply voltage range: 4.5V ~ 5.5V compatibility
- Output drive capability: 8mA minimum for both high and low states
- Input logic thresholds: Low ≤ 0.8V, High ≥ 2V
- Propagation delay: Maximum 7.9ns at 5V with 50pF load
- Operating temperature range: Minimum -40°C ~ 85°C
- Surface mount packaging with SOT-23-5 or equivalent footprint compatibility
- RoHS3 compliance and MSL Level 1 rating
Parts are grouped into three categories: parametric equivalents (identical electrical and mechanical specifications with different packaging variants), direct manufacturers (alternative suppliers with compatible specifications), and upgrades (enhanced specifications or extended temperature ranges).
Parameter Comparison
| Part Number | Manufacturer | Series | Supply Voltage | Quiescent Current (Max) | Output Drive (High/Low) | Propagation Delay | Operating Temp | Package | Status |
|---|---|---|---|---|---|---|---|---|---|
| SN74AHCT1G32DBVT | Texas Instruments | 74AHCT | 4.5V ~ 5.5V | 1 µA | 8mA, 8mA | 7.9ns @ 5V, 50pF | -40°C ~ 85°C | SOT-23-5 | Discontinued |
| 74AHCT1G32DBVRG4 | Texas Instruments | 74AHCT | 4.5V ~ 5.5V | 1 µA | 8mA, 8mA | 7.9ns @ 5V, 50pF | -40°C ~ 85°C | SOT-23-5 | Discontinued |
| SN74AHCT1G32DBVR | Texas Instruments | 74AHCT | 4.5V ~ 5.5V | 1 µA | 8mA, 8mA | 7.9ns @ 5V, 50pF | -40°C ~ 85°C | SOT-23-5 | Active |
| MC74VHC1G32DTT1G | onsemi | 74VHC | 2V ~ 5.5V | 1 µA | 8mA, 8mA | 7.5ns @ 5V, 50pF | -55°C ~ 125°C | 5-TSOP | Obsolete |
| 74AHCT1G32GV,125 | Nexperia USA Inc. | 74AHCT | 4.5V ~ 5.5V | 1 µA | 8mA, 8mA | 7.9ns @ 5V, 50pF | -40°C ~ 125°C | SC-74A | Active |
| 74AHCT1G32W5-7 | Diodes Incorporated | 74AHCT | 4.5V ~ 5.5V | 1 µA | 8mA, 8mA | 7.9ns @ 5V, 50pF | -40°C ~ 125°C | SOT-25 | Active |
| 74AHCT1G32GW,125 | Nexperia USA Inc. | 74AHCT | 4.5V ~ 5.5V | 1 µA | 8mA, 8mA | 7.9ns @ 5V, 50pF | -40°C ~ 125°C | 5-TSSOP | Active |
| NC7ST32M5X | onsemi | 7ST | 4.5V ~ 5.5V | 1 µA | 2mA, 2mA | 26ns @ 5.5V, 50pF | -40°C ~ 85°C | SOT-23-5 | Active |
| NC7ST32P5X | onsemi | 7ST | 4.5V ~ 5.5V | 1 µA | 2mA, 2mA | 26ns @ 5.5V, 50pF | -40°C ~ 85°C | SC-70-5 | Active |
| TC7SET32F,LJ(CT | Toshiba Semiconductor and Storage | TC7SET | 4.5V ~ 5.5V | 2 µA | 8mA, 8mA | 9ns @ 5V, 50pF | -40°C ~ 85°C | SMV | Active |
Engineering Selection Recommendations
Parametric Equivalents (Direct Replacement)
SN74AHCT1G32DBVR is the primary equivalent, offering identical electrical specifications with active product status and Cut Tape packaging availability. This part maintains full compatibility with the original SN74AHCT1G32DBVT design without modification.
Active Alternatives with Extended Temperature Range
74AHCT1G32GV,125 (Nexperia) and 74AHCT1G32W5-7 (Diodes Incorporated) provide identical electrical performance with extended operating temperature to 125°C. These parts are suitable for applications requiring enhanced thermal performance. Package differences (SC-74A and SOT-25 respectively) require PCB layout verification for mechanical compatibility.
Manufacturer-Recommended Alternatives
74AHCT1G32GW,125 (Nexperia) in 5-TSSOP packaging offers the same electrical specifications with extended temperature range and manufacturer recommendation status. This part is actively produced with high inventory availability.
Lower Drive Current Alternatives
NC7ST32M5X and NC7ST32P5X (onsemi 7ST series) maintain voltage and logic specifications but provide reduced output drive capability (2mA versus 8mA) and increased propagation delay (26ns versus 7.9ns). These parts are suitable only for applications with reduced current requirements and non-critical timing paths.
Cross-Manufacturer Options
TC7SET32F,LJ(CT (Toshiba) provides equivalent electrical performance with slightly increased propagation delay (9ns) and quiescent current (2µA). This part is actively produced and RoHS3 compliant.
All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating consistent with the original part.
Frequently Asked Questions (FAQ)
Q: Can I use NC7ST32M5X as a direct replacement for SN74AHCT1G32DBVT?
A: NC7ST32M5X is electrically compatible but with reduced output drive capability (2mA versus 8mA) and slower propagation delay (26ns versus 7.9ns). Use only in applications where these reduced specifications are acceptable.
Q: What is the difference between SOT-23-5 and SC-74A packaging?
A: Both are surface mount packages with identical pin counts and electrical compatibility. SOT-23-5 and SC-74A (SOT-753) are mechanically equivalent. Verify PCB footprint compatibility before substitution.
Q: Is 74AHCT1G32GV,125 a suitable replacement?
A: Yes. 74AHCT1G32GV,125 provides identical electrical specifications with extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). The SC-74A package is mechanically compatible with SOT-23-5 footprints.
Q: Why does MC74VHC1G32DTT1G show obsolete status?
A: MC74VHC1G32DTT1G is marked obsolete but remains electrically compatible with extended temperature range (-55°C to 125°C) and lower minimum supply voltage (2V). Availability may be limited through secondary sources.
Q: What are the key parameters that determine substitution eligibility?
A: Critical parameters are logic function (single 2-input OR gate), supply voltage range (4.5V ~ 5.5V), output drive capability (minimum 8mA for direct replacement), input logic thresholds (0.8V low, 2V high), and propagation delay (7.9ns maximum at 5V, 50pF load). Operating temperature range must meet or exceed -40°C to 85°C.
Q: Can I substitute parts with different package types?
A: Package substitution requires PCB layout verification. SOT-23-5, SC-74A, SOT-25, 5-TSSOP, and SC-70-5 packages have different physical dimensions and pin arrangements. Confirm footprint compatibility before design implementation.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating consistent with the original SN74AHCT1G32DBVT specification.
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