Request Quote
(Ships tomorrow)
SN74AHCT1G126DBVT Equivalent & Substitute Parts
Part Overview
The SN74AHCT1G126DBVT is a non-inverting buffer logic IC manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This component functions as a single-element, 1-bit buffer with 3-state output capability, operating across a 4.5V to 5.5V supply voltage range. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 1 |
| 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 | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the SN74AHCT1G126DBVT is determined by strict equivalence across the following critical parameters:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 1
- 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: SC-74A, SOT-753 or compatible surface mount packages
- RoHS Status: ROHS3 Compliant
Substitute parts are grouped into two categories: parametric equivalents from Texas Instruments with identical electrical specifications, and manufacturer-recommended alternatives from Nexperia, onsemi, and Toshiba that maintain functional and electrical compatibility within the specified parameter ranges.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Logic Type | Output Type | Current (mA) | Voltage Supply | Temp Range | Package | Product Status |
|---|---|---|---|---|---|---|---|---|
| SN74AHCT1G126DBVT | Texas Instruments | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | SOT-23-5 | Discontinued |
| 74AHCT1G125DBVRG4 | Texas Instruments | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | SOT-23-5 | Discontinued |
| 74AHCT1G125DBVTG4 | Texas Instruments | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | SOT-23-5 | Discontinued |
| SN74AHCT1G125DBVR | Texas Instruments | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | SOT-23-5 | Active |
| SN74AHCT1G125DBVT | Texas Instruments | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | SOT-23-5 | Discontinued |
| SN74AHCT1G126DBVR | Texas Instruments | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | SOT-23-5 | Active |
| 74AHCT1G126GW,125 | Nexperia USA Inc. | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | 5-TSSOP | Active |
| 74HCT1G126GV,125 | Nexperia USA Inc. | Buffer, Non-Inverting | 3-State | 6, 6 | 4.5V ~ 5.5V | -40°C ~ 125°C | SC-74A | Active |
| M74VHC1G126DTT1G | onsemi | Buffer, Non-Inverting | 3-State | 8, 8 | 2V ~ 5.5V | -55°C ~ 125°C | 5-TSOP | Obsolete |
| TC7SET126F,LJ(CT | Toshiba Semiconductor and Storage | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 85°C | SC-74A | Active |
| 74AHCT1G125GV,125 | Nexperia USA Inc. | Buffer, Non-Inverting | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 125°C | SC-74A | Active |
Engineering Selection Recommendations
For direct replacement of the discontinued SN74AHCT1G126DBVT, the SN74AHCT1G126DBVR from Texas Instruments is the primary choice. This part maintains identical electrical specifications, package compatibility, and is currently in active production status. Both parts are ROHS3 compliant with MSL 1 rating.
When the SN74AHCT1G126DBVR is unavailable, the SN74AHCT1G125DBVR provides parametric equivalence with active product status. The 74AHCT1G125 and 74AHCT1G126 variants are functionally interchangeable within the 74AHCT series, differing only in internal logic configuration while maintaining identical electrical performance.
For applications requiring extended temperature range or wider supply voltage tolerance, the M74VHC1G126DTT1G from onsemi operates from 2V to 5.5V and -55°C to 125°C. However, this part is obsolete and should be considered only when no other alternatives meet design requirements.
The 74AHCT1G126GW,125 from Nexperia provides active production status with identical electrical specifications but uses a 5-TSSOP package instead of SOT-23-5. PCB layout modification is required for this substitution.
The TC7SET126F,LJ(CT from Toshiba is active and ROHS3 compliant but operates only to 85°C maximum, making it unsuitable for applications requiring the full -40°C to 125°C range.
The 74HCT1G126GV,125 from Nexperia has reduced output current (6mA vs. 8mA) and should be evaluated for load compatibility before selection.
Frequently Asked Questions (FAQ)
Q: Can I use 74AHCT1G125 variants as direct replacements for 74AHCT1G126?
A: Yes. The 74AHCT1G125 and 74AHCT1G126 are functionally equivalent within the 74AHCT series. Both are single-element, 1-bit non-inverting buffers with 3-state output, identical electrical specifications, and the same package options. The internal logic differs, but electrical performance is equivalent for substitution purposes.
Q: What is the difference between SOT-23-5 and 5-TSSOP packages?
A: Both are surface mount packages with five pins, but they have different physical dimensions and pin spacing. SOT-23-5 (also called SC-74A or SOT-753) and 5-TSSOP are not pin-compatible. PCB redesign is required to use parts in different packages.
Q: Why is the M74VHC1G126DTT1G marked as obsolete?
A: The M74VHC1G126DTT1G from onsemi is no longer in active production. While inventory may be available from distributors, long-term supply cannot be guaranteed. Active alternatives from Texas Instruments or Nexperia are recommended for new designs.
Q: Does the 74HCT1G126GV,125 have the same output current as the SN74AHCT1G126DBVT?
A: No. The 74HCT1G126GV,125 provides 6mA output current (high and low), while the SN74AHCT1G126DBVT provides 8mA. Applications requiring 8mA output drive must verify that 6mA is sufficient for their load before substitution.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity rating, matching the original SN74AHCT1G126DBVT specifications.
Q: What is the temperature range limitation of the TC7SET126F,LJ(CT?
A: The TC7SET126F,LJ(CT operates from -40°C to 85°C, which is 40°C below the SN74AHCT1G126DBVT maximum of 125°C. This part is unsuitable for applications requiring operation above 85°C.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts