SN74HC125NG4 Equivalent & Substitute Parts

Part Overview

The SN74HC125NG4 is a non-inverting buffer IC with 4 elements, each with 1 bit per element and 3-state output capability. Manufactured by Texas Instruments in the 74HC logic series, this component operates across a 2V to 6V supply voltage range with output currents of 7.8mA for both high and low states. The device is packaged in a 14-DIP through-hole configuration.

The SN74HC125NG4 is currently discontinued at DiGi Electronics, making it necessary to identify equivalent substitute parts that maintain functional and electrical compatibility for ongoing system support and new designs.

Substiute Parts

SN74HC125NG4

Texas InstrumentsIn Stock: 1122SN74HC125NG4 Datasheet

Current PartRFQ

SN74HC125N

Texas InstrumentsIn Stock: 13616SN74HC125N Datasheet

MFR RecommendedRFQ

SN74HC126N

Texas InstrumentsIn Stock: 2586SN74HC126N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC125NG4 are qualified based on the following critical parameters that determine functional and electrical compatibility:

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: 7.8mA, 7.8mA
• Voltage - Supply: 2V ~ 6V
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

All identified substitute parts maintain identical electrical specifications and physical packaging, ensuring direct functional replacement in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

SN74HC125N (MFR Recommended Substitute)

The SN74HC125N is the primary recommended substitute for the discontinued SN74HC125NG4. This part maintains identical electrical and mechanical specifications while offering the advantage of active product status and significantly higher inventory availability (13,552 units). Both parts share the same base product number (74HC125) and are ROHS3 compliant with REACH unaffected status. The SN74HC125N is supplied in tube packaging and represents the direct functional equivalent.

SN74HC126N (Parametric Equivalent)

The SN74HC126N qualifies as a parametric equivalent based on matching all critical electrical and physical parameters. This part is also active in production with adequate inventory (2,515 units) and maintains ROHS3 compliance. The SN74HC126N differs only in its base product number (74HC126) while preserving all functional characteristics required for substitution. This part is also supplied in tube packaging.

Both substitute parts are suitable for direct replacement in applications requiring the SN74HC125NG4, with selection based on availability and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC125N directly replace the SN74HC125NG4 in existing designs?

A: Yes. The SN74HC125N maintains identical electrical specifications (2V to 6V supply, 7.8mA output current, -40°C to 85°C operating range) and physical packaging (14-DIP through-hole). Both parts are ROHS3 compliant and suitable for direct substitution without circuit modification.

Q: What is the difference between the SN74HC125N and SN74HC126N?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary difference is the base product number designation (74HC125 versus 74HC126). Selection between these parts should be based on availability and supply chain factors.

Q: Are there packaging differences between the main part and substitutes?

A: The SN74HC125NG4 is supplied in standard packaging, while both substitute parts (SN74HC125N and SN74HC126N) are supplied in tube packaging. All three parts use the same 14-DIP (0.300", 7.62mm) through-hole package configuration, ensuring mechanical compatibility.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both SN74HC125N and SN74HC126N are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original SN74HC125NG4.

Q: Why is the SN74HC125N recommended over the SN74HC126N?

A: The SN74HC125N is the manufacturer-recommended substitute and shares the identical base product number (74HC125) with the original part. Additionally, it offers higher inventory availability (13,552 units versus 2,515 units), providing better supply chain reliability.