SN54LS04J Equivalent & Substitute Parts

Part Overview

The SN54LS04J is a 6-channel inverter logic IC manufactured by Texas Instruments in a 14-CDIP package. This component performs basic logic inversion operations and is widely used in digital circuit applications requiring signal inversion. The part is currently in active production status with substantial inventory availability (5096 pcs). Substitute parts become necessary when the primary part is unavailable, when alternative compliance certifications are required, or when different electrical performance characteristics better suit specific application requirements.

Substiute Parts

SN54LS04J

Texas InstrumentsIn Stock: 5183SN54LS04J Datasheet

Current PartRFQ

CD74ACT04E

Harris CorporationIn Stock: 2684CD74ACT04E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN54LS04J with the CD74ACT04E is based on the following alignment of critical parameters:

• Both parts function as 6-channel inverter logic ICs
• Both support the same supply voltage range (4.5V ~ 5.5V)
• Both operate across the same temperature range (-55°C ~ 125°C)
• Both use through-hole mounting in 14-pin DIP packages with compatible 0.300" (7.62mm) pitch
• Both are designed for direct logic signal inversion applications

The CD74ACT04E represents a functional equivalent despite differences in quiescent current, output current ratings, and propagation delay characteristics. These differences reflect the distinct logic families (54LS vs 74ACT) but do not prevent substitution in applications where the electrical performance envelope of the CD74ACT04E is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The SN54LS04J is the primary choice for new designs due to its active product status and ROHS3 compliance certification. This part meets current environmental and regulatory requirements and benefits from ongoing manufacturer support and supply chain availability.

The CD74ACT04E serves as a functional substitute only in legacy system maintenance or repair scenarios where the original part specification must be matched. The obsolete product status and RoHS non-compliance of the CD74ACT04E make it unsuitable for new production designs. Additionally, the RoHS non-compliant status may restrict its use in applications subject to environmental regulations or customer compliance requirements.

When substitution is necessary, verify that the application can tolerate the CD74ACT04E's higher output current capability (24mA vs 400µA/4mA) and faster propagation delay (9.3ns vs 15ns), as these differences may affect circuit behavior in timing-critical or current-limited applications.

Frequently Asked Questions (FAQ)

Q: Can the CD74ACT04E directly replace the SN54LS04J in existing circuits?

A: Physical and functional replacement is possible due to matching pin counts, package dimensions, and supply voltage requirements. However, the CD74ACT04E exhibits different electrical characteristics, including higher output current and faster propagation delay. Circuit validation is necessary to confirm compatibility with specific application requirements.

Q: What are the key differences between these two parts?

A: The primary differences are logic family (54LS vs 74ACT), quiescent current consumption (6.6 mA vs 4 µA), output current ratings (400µA/4mA vs 24mA/24mA), and propagation delay (15ns vs 9.3ns). The SN54LS04J is active and RoHS3 compliant, while the CD74ACT04E is obsolete and RoHS non-compliant.

Q: Are the packages physically compatible?

A: Both parts use 14-pin DIP packages with 0.300" (7.62mm) pitch. The SN54LS04J uses CDIP packaging while the CD74ACT04E uses PDIP packaging. Both are through-hole mount types with compatible pin spacing and can be used in the same PCB footprint.

Q: Why is the CD74ACT04E listed as obsolete?

A: The CD74ACT04E is no longer in active production by Harris Corporation. Obsolete status indicates limited or no availability through standard distribution channels and no ongoing manufacturer support.

Q: Should I use the CD74ACT04E in a new design?

A: No. The SN54LS04J is the appropriate choice for new designs. It is in active production, RoHS3 compliant, and has reliable supply availability. The CD74ACT04E should only be considered for legacy system repairs where the original part specification must be maintained.