74HC138N,652 Equivalent & Substitute Parts

Part Overview

The 74HC138N,652 is a decoder/demultiplexer logic integrated circuit manufactured by NXP USA Inc. in a 16-DIP package configuration. This component functions as a 1 x 3:8 decoder, converting three binary input lines into eight mutually exclusive output lines. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

74HC138N,652

NXP USA Inc.In Stock: 78474HC138N,652 Datasheet

Current PartRFQ

CD74HC138E

Texas InstrumentsIn Stock: 2072CD74HC138E Datasheet

DirectRFQ

SN74HC138N

Texas InstrumentsIn Stock: 13759SN74HC138N Datasheet

MFR RecommendedRFQ

TC74HC138APF

Toshiba Semiconductor and StorageIn Stock: 1174TC74HC138APF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC138N,652 is determined by the following critical parameters that must remain constant across all equivalent parts:

• Functional equivalence: 1 x 3:8 decoder/demultiplexer circuit configuration
• Electrical compatibility: Single supply voltage range 2V ~ 6V, output current specifications 5.2mA high and low
• Package compatibility: 16-DIP (0.300", 7.62mm) through-hole mounting
• Series compatibility: 74HC logic family
• Regulatory compliance: ROHS3 compliance and REACH unaffected status

The identified substitute parts maintain these core parameters while offering active product status and improved availability. Operating temperature ranges may vary within acceptable limits for specific applications.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts—CD74HC138E, SN74HC138N, and TC74HC138APF—maintain full electrical and mechanical compatibility with the 74HC138N,652. Selection among these alternatives should be based on the following factors:

CD74HC138E (Texas Instruments): Offers the widest operating temperature range (-55°C ~ 125°C), providing extended low-temperature performance. Active product status with 2042 units in stock.

SN74HC138N (Texas Instruments): Manufacturer-recommended substitute with highest inventory availability (13,652 units). Operating temperature range -40°C ~ 85°C is suitable for standard industrial applications. Active product status ensures long-term supply continuity.

TC74HC138APF (Toshiba Semiconductor and Storage): Active product with operating temperature range -40°C ~ 85°C. Maintains MSL rating of 1 (Unlimited), matching the original part's moisture sensitivity specification. 1,141 units in stock.

All substitute parts carry ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC138E replace the 74HC138N,652 in all applications?

A: Yes. The CD74HC138E maintains identical circuit configuration, package dimensions, voltage supply range, and output current specifications. The extended operating temperature range (-55°C ~ 125°C) provides additional capability beyond the original part's -40°C ~ 125°C range.

Q: What is the difference between the SN74HC138N and TC74HC138APF?

A: Both parts share identical electrical specifications and package configuration. The primary differences are manufacturer (Texas Instruments vs. Toshiba), inventory levels, and moisture sensitivity level designation. The TC74HC138APF maintains the original MSL rating of 1 (Unlimited).

Q: Are all substitute parts through-hole compatible with the original PCB layout?

A: Yes. All substitute parts use the 16-DIP (0.300", 7.62mm) package with through-hole mounting, ensuring direct pin-for-pin compatibility with existing PCB designs.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range affects suitability only if the application requires operation outside the specified limits. For standard industrial applications operating between -40°C and 85°C, all three substitutes are equivalent. Applications requiring operation below -40°C should specify the CD74HC138E.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts carry ROHS3 compliance certification, matching the original part's regulatory status.