CD74HC237EE4 Equivalent & Substitute Parts Reference

Part Overview

The CD74HC237EE4 is a high-speed CMOS logic decoder/demultiplexer manufactured by Texas Instruments, configured as a 1 x 3:8 circuit in a 16-PDIP package. This device decodes three binary input lines into eight mutually exclusive outputs, operating across a 2V to 6V supply range with symmetric output current characteristics. The part is currently in active production status with ROHS3 compliance certification.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative manufacturers' stock is required, or when design flexibility demands component selection from multiple qualified sources within the same functional and electrical specification envelope.

Substiute Parts

CD74HC237EE4

Texas InstrumentsIn Stock: 1164CD74HC237EE4 Datasheet

Current PartRFQ

CD74HC137E

Harris CorporationIn Stock: 2661CD74HC137E Datasheet

Parametric EquivalentRFQ

CD74HC237E

Harris CorporationIn Stock: 1406CD74HC237E Datasheet

Parametric EquivalentRFQ

CD74HC238E

Texas InstrumentsIn Stock: 33237CD74HC238E Datasheet

Parametric EquivalentRFQ

CD74HC138E

Texas InstrumentsIn Stock: 2072CD74HC138E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC237EE4 is determined by strict parametric matching across the following criteria:

Mandatory Matching Parameters:

• Circuit type and configuration (Decoder/Demultiplexer, 1 x 3:8)
• Package and pinout (16-DIP, 0.300" pitch)
• Voltage supply range (2V to 6V single supply)
• Output current specifications (5.2mA high and low)
• Operating temperature range (-55°C to 125°C)
• Mounting technology (Through Hole)
• Series classification (74HC)

All four substitute parts listed below meet these mandatory parameters without exception. Substitution is based solely on functional equivalence and electrical compatibility within the defined parameter set. No performance assumptions or conditional compatibility statements apply.

Parameter Comparison

Engineering Selection Recommendations

Active Production Alternatives (Preferred):

CD74HC238E and CD74HC138E, both manufactured by Texas Instruments, are functionally equivalent to the CD74HC237EE4 with identical electrical and mechanical specifications. Both parts maintain active production status and carry ROHS3 compliance certification, making them suitable for new designs and long-term supply chain continuity.

Obsolete Alternatives (Legacy Applications Only):

CD74HC137E and CD74HC237E, manufactured by Harris Corporation, are parametrically equivalent but carry obsolete product status and RoHS non-compliance designations. These parts are suitable only for maintenance, repair, or legacy system applications where component replacement must match existing inventory. New design implementations should not incorporate these parts.

Compliance Considerations:

For applications requiring regulatory compliance with current environmental standards, selection must be limited to CD74HC238E or CD74HC138E. The Harris Corporation variants do not meet current RoHS3 requirements and should not be specified for applications subject to modern procurement or environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can CD74HC238E be used as a direct replacement for CD74HC237EE4?

A: Yes. CD74HC238E meets all mandatory electrical and mechanical parameters: identical 1 x 3:8 decoder configuration, 16-DIP package, 2V to 6V supply range, 5.2mA output current specifications, and -55°C to 125°C operating temperature. Both are Texas Instruments products with active status and ROHS3 compliance.

Q: What is the difference between CD74HC237EE4 and CD74HC138E?

A: Both parts are functionally equivalent 1 x 3:8 decoders in 16-DIP packages with identical electrical specifications. The difference lies in the base product number designation (237 versus 138), which reflects different internal logic configurations or pin arrangements within the same functional class. Both are active, ROHS3-compliant Texas Instruments products suitable for direct substitution.

Q: Are the Harris Corporation parts (CD74HC137E and CD74HC237E) suitable for new designs?

A: No. These parts carry obsolete product status and RoHS non-compliance designations. They are suitable only for maintenance and repair of existing systems. New designs must specify CD74HC238E or CD74HC138E to ensure compliance with current environmental regulations and supply chain continuity.

Q: Does package format affect substitution eligibility?

A: No. All substitute parts use identical 16-DIP (0.300", 7.62mm) through-hole packaging in tube format. Package compatibility is guaranteed across all listed alternatives.

Q: Can these parts be used in applications requiring -55°C to 125°C operation?

A: Yes. All substitute parts, including obsolete variants, are rated for the full -55°C to 125°C operating temperature range. Temperature specification does not differentiate substitution eligibility.

Q: What supply voltage range applies to all substitute parts?

A: All parts operate across a 2V to 6V single supply range. No voltage derating or conditional operation applies to any substitute. The full 2V to 6V range is guaranteed for all listed alternatives.