CD74HCT154ENG4 Equivalent & Substitute Parts

Part Overview

The CD74HCT154ENG4 is a decoder/demultiplexer logic integrated circuit manufactured by Texas Instruments, configured as a 1 x 4:16 decoder in a 24-pin DIP package. This part is classified as obsolete, making substitute components necessary for new designs and production continuity. The CD74HCT154 series provides single-supply operation with standard TTL-compatible logic levels, suitable for address decoding and demultiplexing applications in digital systems.

Substiute Parts

CD74HCT154ENG4

Texas InstrumentsIn Stock: 957CD74HCT154ENG4 Datasheet

Current PartRFQ

CD74HCT154M96

Texas InstrumentsIn Stock: 2284CD74HCT154M96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT154ENG4 is determined by functional equivalence across the following critical parameters:

• Decoder Configuration: 1 x 4:16 circuit topology
• Voltage Supply Range: 4.5V ~ 5.5V single supply operation
• Output Current Capability: 4mA high and low output current
• Operating Temperature Range: -55°C ~ 125°C
• Logic Family: 74HCT series (TTL-compatible CMOS)
• Regulatory Compliance: ROHS3 compliant, REACH unaffected

The primary difference between the main part and its substitute lies in the mounting technology and package form factor. The CD74HCT154M96 maintains identical electrical specifications while offering surface-mount packaging, enabling compatibility with modern PCB assembly processes.

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT154M96 is the direct functional equivalent of the CD74HCT154ENG4. Selection between these parts depends on assembly methodology and PCB design requirements:

CD74HCT154ENG4 (Through-Hole DIP): Suitable for through-hole assembly processes, breadboard prototyping, and legacy PCB designs. This part is obsolete and subject to availability constraints.

CD74HCT154M96 (Surface-Mount SOIC): Recommended for new designs and production environments utilizing surface-mount technology. This part maintains active product status with established supply channels. Both parts meet ROHS3 compliance and carry identical electrical specifications, ensuring functional interchangeability at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT154M96 replace CD74HCT154ENG4 in existing designs?

A: Electrical replacement is direct. The CD74HCT154M96 provides identical decoder functionality, voltage supply range, output current, and temperature performance. PCB layout modification is required due to package differences (DIP to SOIC).

Q: What is the primary difference between these parts?

A: The CD74HCT154ENG4 uses through-hole DIP packaging for manual or wave soldering assembly. The CD74HCT154M96 uses surface-mount SOIC packaging for automated pick-and-place assembly. All electrical parameters remain identical.

Q: Why is the CD74HCT154ENG4 listed as obsolete?

A: Obsolescence reflects Texas Instruments' product lifecycle management. The CD74HCT154M96 represents the active continuation of this decoder function in modern surface-mount packaging.

Q: Are there any compliance differences between these parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry identical MSL ratings. No compliance differentiation exists.

Q: What are the package dimensions for each part?

A: CD74HCT154ENG4 measures 0.300" (7.62mm) in DIP form. CD74HCT154M96 measures 0.295" (7.50mm) width in SOIC form. Both are 24-pin packages with different lead configurations.