CD74HC125EE4 Equivalent & Substitute Parts

Part Overview

The CD74HC125EE4 is a 4-channel non-inverting buffer with 3-state output logic integrated circuit manufactured by Texas Instruments. This device operates across a 2V to 6V supply voltage range and is housed in a 14-pin DIP package suitable for through-hole mounting applications. The part is currently in active production status with 906 units available in new original inventory.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory depletion occurs, or when design requirements permit functional equivalents from alternative manufacturers. The CD74HC125EE4 has documented parametric equivalents that maintain identical electrical and mechanical specifications.

Substiute Parts

CD74HC125EE4

Texas InstrumentsIn Stock: 967CD74HC125EE4 Datasheet

Current PartRFQ

CD74HC125E

Harris CorporationIn Stock: 2070CD74HC125E Datasheet

Parametric EquivalentRFQ

CD74HC126E

Harris CorporationIn Stock: 2777CD74HC126E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC125EE4 is determined by strict parametric matching across the following critical criteria:

Electrical Parameters (Must Match Exactly):

• Logic type: Buffer, Non-Inverting
• Number of elements: 4
• Bits per element: 1
• Output configuration: 3-State
• Output current specifications: 7.8 mA (high and low)
• Supply voltage range: 2V ~ 6V
• Operating temperature range: -55°C ~ 125°C

Mechanical Parameters (Must Match Exactly):

• Package type: 14-DIP
• Physical dimensions: 0.300" (7.62mm)
• Mounting method: Through Hole
• Supplier device package: 14-PDIP

Series Compatibility:

• 74HC logic family designation

All identified substitute parts maintain 100% compliance with these parameters. Substitution is valid only when all electrical and mechanical specifications align with the primary part.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: CD74HC125EE4 (Texas Instruments)

The CD74HC125EE4 is the recommended primary choice for new designs and procurement. This part maintains active production status, ensuring long-term availability and supply chain stability. The device carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for commercial and industrial applications. Current inventory of 906 units supports immediate deployment.

Secondary Selection: CD74HC125E (Harris Corporation)

The CD74HC125E provides parametric equivalence with identical electrical and mechanical specifications. However, this part carries obsolete product status, indicating discontinued manufacturing. RoHS non-compliance restricts use in applications subject to environmental regulations. This substitute is suitable only for legacy system maintenance or applications where RoHS compliance is not mandated. Inventory availability is higher at 2026 units, but procurement should account for obsolescence risk.

Tertiary Selection: CD74HC126E (Harris Corporation)

The CD74HC126E maintains full parametric compatibility with the primary part across all electrical and mechanical parameters. Like the CD74HC125E, this part is obsolete and RoHS non-compliant. The higher inventory level of 2730 units does not offset the obsolescence and compliance limitations. This substitute is applicable only for legacy system support where regulatory compliance is not required.

Compliance Considerations:

Applications requiring ROHS3 compliance must use the CD74HC125EE4. Substitution with Harris Corporation parts (CD74HC125E or CD74HC126E) violates RoHS compliance requirements and is not permitted in regulated environments.

Frequently Asked Questions (FAQ)

Q: Can CD74HC125E or CD74HC126E be used as direct replacements for CD74HC125EE4?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. However, the CD74HC125EE4 is the only option that maintains active production status and ROHS3 compliance. Substitution with obsolete parts is valid only for legacy applications where RoHS compliance is not required.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution requires exact matching of: logic type (Buffer, Non-Inverting), element count (4), bits per element (1), output type (3-State), output current (7.8 mA high and low), supply voltage range (2V ~ 6V), operating temperature range (-55°C ~ 125°C), package type (14-DIP), physical dimensions (0.300", 7.62mm), and mounting method (Through Hole).

Q: Are there any differences in pin configuration between these parts?

A: All three parts use the 14-PDIP package with identical pin assignments. Physical and electrical pin compatibility is guaranteed across all substitute options.

Q: What is the difference between CD74HC125E and CD74HC126E?

A: Both parts are parametrically identical in electrical performance and physical packaging. The primary distinction is the base product number designation (74HC125 versus 74HC126), which reflects different internal logic configurations. For the specified parameters, both function identically as 4-channel non-inverting buffers with 3-state output.

Q: Should I use substitute parts for new designs?

A: New designs should specify the CD74HC125EE4 (Texas Instruments) to ensure active production support, regulatory compliance, and long-term availability. Substitute parts are appropriate only for legacy system maintenance or replacement scenarios.

Q: What is the inventory status for each part?

A: CD74HC125EE4 has 906 units in stock. CD74HC125E has 2026 units available. CD74HC126E has 2730 units available. All are listed as new original inventory.

Q: Are there any temperature or voltage derating considerations between these parts?

A: All three parts operate identically across the specified temperature range (-55°C ~ 125°C) and supply voltage range (2V ~ 6V). No derating differences exist between the primary part and substitutes.