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74HC126D,652 Equivalent & Substitute Parts
Part Overview
The 74HC126D,652 is a non-inverting buffer logic IC manufactured by Nexperia USA Inc., featuring 4 elements with 3-state output capability. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The 14-SOIC surface mount package and 2V to 6V supply voltage range define its operational scope within digital logic applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74HC126D,652 |
| Manufacturer | Nexperia USA Inc. |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 1 |
| Output Type | 3-State |
| Current - Output High, Low | 7.8mA, 7.8mA |
| Voltage - Supply | 2V ~ 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 |
Substitute Part Grouping Explanation
Substitution eligibility for the 74HC126D,652 is determined by the following critical parameters:
- Logic Type: Buffer, Non-Inverting (4 elements, 1 bit per element)
- Output Type: 3-State
- Output Current: 7.8mA (high and low)
- Supply Voltage Range: 2V ~ 6V
- Package: 14-SOIC surface mount
- Pin Configuration: Functional equivalence at the 14-pin SOIC level
Substitute parts are categorized as follows:
Parametric Equivalent: Parts with identical electrical specifications and package footprint, differing only in manufacturer or product status.
Upgrade Parts: Parts with enhanced specifications (extended temperature range, active product status, improved compliance) that maintain full backward compatibility.
Similar Parts: Parts meeting all functional and electrical requirements with minor variations in temperature range or compliance status.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements | Output Type | Current (mA) | Supply Voltage | Temp Range (°C) | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC126D,652 | Nexperia USA Inc. | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 125 | 14-SOIC | Obsolete | ROHS3 |
| 74HC125D,652 | Nexperia USA Inc. | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 125 | 14-SOIC | Obsolete | ROHS3 |
| CD74HC126M | Harris Corporation | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -55 ~ 125 | 14-SOIC | Obsolete | Non-compliant |
| CD74HC126M96 | Texas Instruments | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -55 ~ 125 | 14-SOIC | Active | ROHS3 |
| CD74HC126MT | Texas Instruments | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -55 ~ 125 | 14-SOIC | Discontinued at DiGi Electronics | ROHS3 |
| MC74HC126ADG | onsemi | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -55 ~ 125 | 14-SOIC | Obsolete | ROHS3 |
| MC74HC126ADR2G | onsemi | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -55 ~ 125 | 14-SOIC | Active | ROHS3 |
| MM74HC126M | Fairchild Semiconductor | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 14-SOIC | Active | Not specified |
| MM74HC126MX | Fairchild Semiconductor | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 14-SOIC | Active | Not specified |
| SN74HC126D | Texas Instruments | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 14-SOIC | Discontinued at DiGi Electronics | ROHS3 |
| SN74HC126DR | Texas Instruments | Buffer, Non-Inverting | 4 | 3-State | 7.8 / 7.8 | 2V ~ 6V | -40 ~ 85 | 14-SOIC | Active | ROHS3 |
Engineering Selection Recommendations
Primary Selection (Active Status & Full Compliance):
- CD74HC126M96 (Texas Instruments): Active product status with ROHS3 compliance and extended temperature range (-55°C to 125°C). Highest inventory availability (13,935 units).
- MC74HC126ADR2G (onsemi): Active product status with ROHS3 compliance and extended temperature range (-55°C to 125°C). Available in Cut Tape & Digi-Reel packaging.
- SN74HC126DR (Texas Instruments): Active product status with ROHS3 compliance. Largest inventory (17,800 units). Temperature range limited to -40°C to 85°C.
Secondary Selection (Parametric Equivalence):
- 74HC125D,652 (Nexperia USA Inc.): Identical electrical and thermal specifications to the main part. Maintains ROHS3 compliance. Higher inventory (997 units) than the original part.
Tertiary Selection (Active Status, Limited Temperature Range):
- MM74HC126M and MM74HC126MX (Fairchild Semiconductor): Active product status with adequate inventory. Operating temperature limited to -40°C to 85°C. RoHS compliance status not specified.
Parts with discontinued or obsolete status should be avoided for new designs unless legacy system maintenance is required.
Frequently Asked Questions (FAQ)
Q: Can 74HC125D,652 be used as a direct replacement for 74HC126D,652?
A: Yes. Both parts share identical electrical specifications, output current ratings, supply voltage range, and package footprint. The primary difference is the base product number (125 vs. 126), which reflects internal logic configuration differences that do not affect functional compatibility in applications requiring non-inverting buffer operation with 3-state output.
Q: What is the difference between the Nexperia and Texas Instruments versions?
A: All versions maintain identical electrical performance (7.8mA output current, 2V to 6V supply). Texas Instruments versions (CD74HC126M96, SN74HC126DR) offer extended temperature range (-55°C to 125°C vs. -40°C to 125°C) and active product status. Nexperia versions are classified as obsolete.
Q: Are there packaging differences between substitute parts?
A: All listed substitutes use the 14-SOIC surface mount package with identical 0.154" (3.90mm) width. Packaging variations exist only in supplier format (Tube, Cut Tape & Digi-Reel, Tape & Reel), which do not affect component functionality or PCB compatibility.
Q: Which substitute offers the best long-term availability?
A: SN74HC126DR (Texas Instruments) provides the highest inventory level (17,800 units) with active product status and ROHS3 compliance. CD74HC126M96 offers comparable availability (13,935 units) with extended temperature range capability.
Q: Is RoHS compliance critical for substitution?
A: ROHS3 compliance is specified for the original 74HC126D,652. Substitutes maintaining ROHS3 status (CD74HC126M96, MC74HC126ADR2G, SN74HC126D, SN74HC126DR) are preferred for regulatory alignment. CD74HC126M (Harris Corporation) is RoHS non-compliant and should be avoided unless legacy system requirements mandate its use.
Q: What is the temperature operating range consideration?
A: The original part operates from -40°C to 125°C. Substitutes offer two ranges: extended (-55°C to 125°C) for enhanced environmental tolerance, or standard (-40°C to 85°C) for typical industrial applications. Selection depends on system thermal requirements.
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