74F125SJ Equivalent & Substitute Parts

Part Overview

The 74F125SJ is a non-inverting buffer logic IC manufactured by onsemi, featuring 4 elements with 1 bit per element and 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 14-SOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74F125SJ

onsemiIn Stock: 2579274F125SJ Datasheet

Current PartRFQ

SN74F125NSR

Texas InstrumentsIn Stock: 3503SN74F125NSR Datasheet

DirectRFQ

SN74F125D

Texas InstrumentsIn Stock: 1912SN74F125D Datasheet

SimilarRFQ

SN74F125DR

Texas InstrumentsIn Stock: 12577SN74F125DR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F125SJ are qualified based on the following critical parameters that must remain constant:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 4
• Number of Bits per Element: 1
• Output Type: 3-State
• Current - Output High, Low: 15mA, 64mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Series: 74F
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Substitutes are grouped into two categories: direct manufacturer equivalents (identical package specifications) and similar alternatives (compatible electrical specifications with package variations). Package differences are noted where applicable, as they may affect board layout and assembly processes.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain electrical equivalence with the 74F125SJ across critical functional parameters. Selection should be based on product status and compliance requirements:

SN74F125NSR and SN74F125DR are both active products from Texas Instruments with ROHS3 compliance, providing long-term availability and supply chain stability. Both maintain the 14-SOIC package specification at 0.209" width, matching the original 74F125SJ footprint.

SN74F125D carries a Last Time Buy status, indicating limited future availability. While electrically equivalent, this part features a different package width (0.154" versus 0.209"), which may require board layout modifications.

For new designs and production continuity, SN74F125NSR or SN74F125DR are preferred due to active product status and ROHS3 compliance certification.

Frequently Asked Questions (FAQ)

Q: Can SN74F125D be used as a direct replacement for 74F125SJ?

A: SN74F125D is electrically equivalent but features a different 14-SOIC package width (0.154" versus 0.209"). This dimensional difference may affect PCB footprint compatibility and assembly processes. Physical verification against board design is required before substitution.

Q: What is the difference between SN74F125NSR and SN74F125DR?

A: Both parts are electrically and functionally identical. The primary difference is packaging format: SN74F125NSR is supplied in Tape & Reel format, while SN74F125DR is also supplied in Tape & Reel. Both maintain the same 14-SOIC (0.154", 3.90mm Width) package specification and active product status.

Q: Why is the 74F125SJ classified as obsolete?

A: The 74F125SJ is an onsemi product that has reached end-of-life status. Texas Instruments maintains active production of functionally equivalent 74F125 series parts, making cross-manufacturer substitution viable for design continuity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitute parts (SN74F125NSR, SN74F125D, SN74F125DR) carry ROHS3 compliance certification. The original 74F125SJ is listed as REACH Unaffected.

Q: What are the key electrical parameters that must match for substitution?

A: Critical parameters include logic type (non-inverting buffer), element count (4), output type (3-state), current ratings (15mA high, 64mA low), supply voltage range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C). All qualified substitutes maintain these specifications.