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SN74AHCT126QPWREP Equivalent & Substitute Parts
Part Overview
The SN74AHCT126QPWREP is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments, housed in a 14-TSSOP surface mount package. This device functions as a 4-element buffer with 3-state output capability, operating across a 4.5V to 5.5V supply voltage range and rated for -40°C to 125°C ambient temperature operation. The part is currently in active production status with 941 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence within the 74AHCT logic family and compatible series.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 1 |
| Output Type | 3-State |
| Current - Output High, Low | 8mA, 8mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 14-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the SN74AHCT126QPWREP are classified based on strict adherence to the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 4
- Number of Bits per Element: 1
- Output Type: 3-State
- Current - Output High, Low: 8mA, 8mA
- Voltage - Supply: 4.5V ~ 5.5V
- Package / Case: 14-TSSOP (0.173", 4.40mm Width)
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
Grouping Categories:
Parametric Equivalents (Texas Instruments 74AHCT Series): Parts meeting all electrical and mechanical specifications with identical or extended operating temperature ranges. Includes automotive-qualified variants (AEC-Q100) with identical functional performance.
Parametric Equivalents (Nexperia 74AHCT Series): Parts from alternative manufacturer meeting identical electrical specifications and package requirements.
Parametric Equivalents (Diodes Incorporated 74AHCT Series): Parts from alternative manufacturer meeting identical electrical specifications and package requirements.
Direct Manufacturer Equivalent (onsemi 74VHCT Series): Part meeting all electrical specifications with identical package and output characteristics, with operating temperature range of -40°C to 85°C.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Series | Logic Type | Elements | Output Type | Current (mA) | Voltage Supply | Temp Range | Package | Grade | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SN74AHCT126QPWREP | Texas Instruments | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Standard | 941 |
| CAHCT125QPWRG4Q1 | Texas Instruments | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Automotive | 6050 |
| CAHCT126QPWRG4Q1 | Texas Instruments | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Automotive | 4830 |
| SN74AHCT125QPWRQ1 | Texas Instruments | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Automotive | 2938 |
| SN74AHCT126PWR | Texas Instruments | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Standard | 3100 |
| SN74AHCT126QPWRQ1 | Texas Instruments | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Automotive | 86900 |
| M74VHCT126ADTR2G | onsemi | 74VHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-TSSOP | Standard | 7512 |
| 74AHCT125PW,118 | Nexperia USA Inc. | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Standard | 11202 |
| 74AHCT125PW-Q100,1 | Nexperia USA Inc. | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Automotive | 2871 |
| 74AHCT125T14-13 | Diodes Incorporated | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Standard | 1425 |
| 74AHCT126PW,118 | Nexperia USA Inc. | 74AHCT | Buffer, Non-Inverting | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 14-TSSOP | Standard | 6122 |
Engineering Selection Recommendations
Texas Instruments 74AHCT Series (Standard Grade): SN74AHCT126PWR and SN74AHCT126QPWRQ1 provide direct functional equivalence with identical electrical specifications and full temperature range operation (-40°C to 125°C). Both parts maintain active production status and ROHS3 compliance.
Texas Instruments 74AHCT Series (Automotive Grade): CAHCT126QPWRG4Q1 and SN74AHCT126QPWRQ1 are AEC-Q100 qualified variants suitable for automotive applications, maintaining identical electrical performance with extended qualification documentation.
Nexperia 74AHCT Series: 74AHCT126PW,118 provides parametric equivalence from an alternative qualified manufacturer with identical electrical specifications, package configuration, and full temperature range operation.
Diodes Incorporated 74AHCT Series: 74AHCT125T14-13 meets all electrical and mechanical specifications with full temperature range operation and ROHS3 compliance.
onsemi 74VHCT Series: M74VHCT126ADTR2G provides functional equivalence with identical electrical specifications and package, with operating temperature range limited to -40°C to 85°C. This part is suitable for applications not requiring the extended upper temperature limit of 125°C.
Frequently Asked Questions (FAQ)
Q: Can I substitute SN74AHCT126QPWREP with M74VHCT126ADTR2G?
A: Yes, with temperature range consideration. Both parts share identical electrical specifications (4.5V to 5.5V supply, 8mA output current, 3-state output, 14-TSSOP package). The M74VHCT126ADTR2G operates to 85°C maximum ambient temperature, compared to 125°C for the SN74AHCT126QPWREP. Substitution is valid for applications with maximum ambient temperature not exceeding 85°C.
Q: What is the difference between standard and automotive-grade variants?
A: Automotive-grade parts (AEC-Q100 qualified) such as CAHCT126QPWRG4Q1 and SN74AHCT126QPWRQ1 undergo additional qualification testing and documentation requirements mandated for automotive applications. Electrical specifications remain identical to standard-grade parts. Use automotive-grade variants only when AEC-Q100 qualification is explicitly required by application specifications.
Q: Are all substitute parts available in the same packaging?
A: Yes. All listed substitute parts are housed in 14-TSSOP surface mount packages with identical physical dimensions (0.173" width, 4.40mm). Pin configuration and footprint compatibility are maintained across all substitutes.
Q: Can I use 74AHCT125 variants as substitutes for 74AHCT126?
A: The 74AHCT125 and 74AHCT126 are functionally equivalent non-inverting buffers with identical electrical specifications, element count, and output characteristics. Both are listed as cross-compatible substitutes. Verify pinout compatibility with application schematic before substitution.
Q: What inventory levels should I consider for procurement?
A: Current inventory levels vary by part number and manufacturer. SN74AHCT126QPWRQ1 (86,900 units) and 74AHCT125PW,118 (11,202 units) offer highest availability. Standard-grade SN74AHCT126PWR maintains 3,100 units in stock. Automotive-qualified variants show lower inventory levels (2,871 to 6,050 units). Lead time and supply chain requirements should inform selection when inventory is a consideration.
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 SN74AHCT126QPWREP specifications.
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