CD74HCT154EN Equivalent & Substitute Parts

Part Overview

The CD74HCT154EN is a 1 x 4:16 decoder/demultiplexer logic integrated circuit manufactured by Texas Instruments in the 74HCT series. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and production continuity. The CD74HCT154EN operates as a single-supply decoder with standard TTL-compatible voltage levels and is housed in a 24-pin DIP package suitable for through-hole mounting applications.

Substiute Parts

CD74HCT154EN

Texas InstrumentsIn Stock: 1109CD74HCT154EN Datasheet

Current PartRFQ

CD74HCT154M96

Texas InstrumentsIn Stock: 2284CD74HCT154M96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT154EN is determined by strict equivalence across the following critical parameters:

• Functional circuit configuration (1 x 4:16 decoder/demultiplexer)
• Output current specifications (4mA high, 4mA low)
• Supply voltage range (4.5V ~ 5.5V single supply)
• Operating temperature range (-55°C ~ 125°C)
• Series compatibility (74HCT logic family)
• Regulatory compliance (RoHS3, REACH unaffected)

The primary substitute, CD74HCT154M96, maintains identical electrical specifications and functional performance while differing only in mounting technology and package form factor. This substitution is valid for applications where the mounting method can be adapted from through-hole to surface-mount assembly.

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT154M96 is the direct functional equivalent to the CD74HCT154EN. Both components share identical electrical performance characteristics, regulatory compliance certifications, and operational specifications. The primary distinction is packaging format: the CD74HCT154EN uses through-hole DIP mounting, while the CD74HCT154M96 employs surface-mount SOIC technology.

Selection between these parts depends on assembly methodology. Through-hole assembly processes require the CD74HCT154EN or equivalent DIP-packaged alternatives. Surface-mount assembly processes utilize the CD74HCT154M96. The CD74HCT154M96 carries active product status, ensuring continued availability and manufacturing support, whereas the CD74HCT154EN is obsolete.

For new designs or production transitions, the CD74HCT154M96 is the recommended selection due to active product status and modern surface-mount compatibility. Existing through-hole designs may continue using the CD74HCT154EN while stock remains available, with planned migration to surface-mount equivalents for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT154M96 directly replace the CD74HCT154EN in existing circuit boards?

A: Electrical substitution is complete; however, physical replacement requires PCB redesign. The CD74HCT154EN uses through-hole DIP mounting with 0.300" (7.62mm) spacing, while the CD74HCT154M96 uses surface-mount SOIC with 0.295" (7.50mm) width. PCB layout and assembly process must be adapted accordingly.

Q: Are there any electrical performance differences between these parts?

A: No. Both components maintain identical output current specifications (4mA high/low), supply voltage range (4.5V ~ 5.5V), operating temperature range (-55°C ~ 125°C), and functional circuit configuration (1 x 4:16 decoder/demultiplexer).

Q: Why is the CD74HCT154EN classified as obsolete?

A: Product obsolescence reflects Texas Instruments' transition from through-hole DIP packaging to modern surface-mount technologies. The CD74HCT154M96 represents the active equivalent in the current product portfolio.

Q: What compliance certifications apply to both parts?

A: Both the CD74HCT154EN and CD74HCT154M96 are ROHS3 compliant, REACH unaffected, and carry moisture sensitivity level 1 (unlimited). ECCN classification is EAR99 for both components.

Q: Are there alternative 74HCT decoder/demultiplexer options?

A: Substitution is limited to components maintaining the identical 1 x 4:16 circuit configuration, 4mA output current, and 4.5V ~ 5.5V supply voltage specifications. The CD74HCT154M96 is the primary active equivalent from Texas Instruments for this functional specification.