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74LVC126ADR2G Equivalent & Substitute Parts
Part Overview
The 74LVC126ADR2G is a non-inverting buffer IC manufactured by onsemi, featuring 4 elements with 1 bit per element and 3-state output capability. This device operates across a supply voltage range of 1.2V to 3.6V and is housed in a 14-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74LVC126ADR2G |
| Manufacturer | onsemi |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 1 |
| Output Type | 3-State |
| Current - Output High, Low | 24mA, 24mA |
| Voltage - Supply | 1.2V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the 74LVC126ADR2G is determined by the following critical parameters:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 4
- Number of Bits per Element: 1
- Output Type: 3-State
- Current - Output High, Low: 24mA, 24mA
- Voltage - Supply: 1.2V ~ 3.6V (minimum requirement)
- Operating Temperature: -40°C ~ 125°C (TA)
- Package / Case: 14-SOIC or compatible 14-SO packages
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
Substitute parts are grouped into two categories: direct pin-compatible replacements from active manufacturers, and parametric equivalents with identical electrical specifications but potentially different base part numbers or package variants.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Logic Type | Elements | Output Type | Current (mA) | Voltage Supply | Temp Range | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| 74LVC126ADR2G | onsemi | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Obsolete |
| SN74LVC126ADT | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
| SN74LVC126ANSR | Texas Instruments | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.65V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (5.30mm) | Active |
| 74LVC125AD,118 | Nexperia USA Inc. | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
| 74LVC125AD-Q100J | Nexperia USA Inc. | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
| 74LVC125AD/AUJ | NXP USA Inc. | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
| 74LVC126AD,118 | Nexperia USA Inc. | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
| 74LVC126AD-Q100J | Nexperia USA Inc. | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
| 74LVC126AD/AUJ | NXP USA Inc. | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
| MC74LCX126DR2G | onsemi | Buffer, Non-Inverting | 4 x 1-bit | 3-State | 24/24 | 1.2V ~ 3.6V | -40°C ~ 125°C | 14-SOIC (3.90mm) | Active |
Engineering Selection Recommendations
For applications requiring the 74LVC126ADR2G, the following selection criteria apply:
Direct Pin-Compatible Replacements (Same Package, Same Voltage Range):
- 74LVC126AD,118 (Nexperia USA Inc.) - Active status, identical electrical specifications, 14-SOIC package
- 74LVC126AD/AUJ (NXP USA Inc.) - Active status, identical electrical specifications, 14-SOIC package
- 74LVC126AD-Q100J (Nexperia USA Inc.) - Active status with AEC-Q100 automotive qualification, 14-SOIC package
Texas Instruments Alternatives (Slightly Higher Minimum Supply Voltage):
- SN74LVC126ADT - Active status, 1.65V minimum supply voltage (vs. 1.2V), 14-SOIC package, Tape & Reel packaging
- SN74LVC126ANSR - Active status, 1.65V minimum supply voltage, 14-SOIC package with 5.30mm width, Tape & Reel packaging
Parametric Equivalents (74LVC125 Base Part Number):
- 74LVC125AD,118 (Nexperia USA Inc.) - Active status, identical electrical specifications, 14-SOIC package
- 74LVC125AD/AUJ (NXP USA Inc.) - Active status, identical electrical specifications, 14-SOIC package
- 74LVC125AD-Q100J (Nexperia USA Inc.) - Active status with AEC-Q100 automotive qualification, 14-SOIC package
All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature ranges. Selection should prioritize active-status parts from established manufacturers. For automotive applications, AEC-Q100 qualified variants (74LVC126AD-Q100J or 74LVC125AD-Q100J) are available.
Frequently Asked Questions (FAQ)
Q: Can I use 74LVC125 parts as substitutes for 74LVC126? A: Yes. Both the 74LVC125 and 74LVC126 are non-inverting buffers with 4 elements, 1 bit per element, and 3-state outputs. They share identical electrical specifications including current output (24mA), voltage supply range (1.2V ~ 3.6V), and operating temperature range (-40°C ~ 125°C). The primary difference is the base part number designation; they are functionally equivalent.
Q: What is the difference between the onsemi and Texas Instruments versions? A: The primary difference is the minimum supply voltage specification. The onsemi 74LVC126ADR2G operates from 1.2V minimum, while Texas Instruments SN74LVC126ADT and SN74LVC126ANSR operate from 1.65V minimum. Both meet the 3.6V maximum and share identical output current and temperature specifications. For applications requiring operation below 1.65V, onsemi or Nexperia/NXP parts are required.
Q: Are there package differences between substitute parts? A: Most substitute parts use the standard 14-SOIC package with 3.90mm width. The exception is SN74LVC126ANSR, which uses a 14-SOIC package with 5.30mm width. Verify PCB footprint compatibility before selection. All parts are surface-mount devices.
Q: What does AEC-Q100 qualification mean? A: AEC-Q100 is an automotive qualification standard. Parts designated with -Q100J (such as 74LVC126AD-Q100J and 74LVC125AD-Q100J) have undergone additional testing and qualification for automotive applications. These parts are suitable for both commercial and automotive designs.
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 original 74LVC126ADR2G specifications.
Q: Which substitute offers the best availability? A: According to current inventory data, 74LVC125AD,118 from Nexperia USA Inc. offers the highest stock level at 98,042 pieces. SN74LVC126ANSR from Texas Instruments provides 3,100 pieces, and 74LVC126AD,118 from Nexperia USA Inc. provides 5,426 pieces.
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