74HC138D/AUJ Equivalent & Substitute Parts

Part Overview

The 74HC138D/AUJ is a logic decoder/demultiplexer IC manufactured by NXP USA Inc., configured as a 1 x 3:8 decoder in a 16-SOIC surface mount package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when sourcing from multiple suppliers is needed to optimize inventory and supply chain resilience.

Key Parameters

Parameter	Value
Type	Decoder/Demultiplexer
Circuit Configuration	1 x 3:8
Independent Circuits	1
Current - Output High, Low	5.2mA, 5.2mA
Voltage Supply Source	Single Supply
Voltage - Supply Range	2V ~ 6V
Operating Temperature Range	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC138D/AUJ is determined by strict adherence to the following parameters: decoder/demultiplexer type with 1 x 3:8 circuit configuration, output current specifications of 5.2mA for both high and low states, single supply voltage operation within the 2V to 6V range, operating temperature range of -40°C to 125°C, surface mount mounting type, and 16-SOIC package format with 0.154" width (3.90mm). All substitute parts listed maintain these electrical and mechanical specifications. Variations in packaging format (Cut Tape vs. Tape & Reel), manufacturer identity, and automotive qualification (AEC-Q100) do not affect functional substitutability but may impact procurement and application requirements.

Parameter Comparison

Part Number	Manufacturer	Circuit	Output Current (mA)	Voltage Supply (V)	Temp Range (°C)	Package	Packaging Format	Automotive Grade	Inventory (Pcs)
74HC138D/AUJ	NXP USA Inc.	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	-	No	988
74HC137D,653	Nexperia USA Inc.	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Tape & Reel	No	12598
74HC138D	Toshiba Semiconductor and Storage	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Cut Tape & Digi-Reel	No	300300
74HC138D,653	Nexperia USA Inc.	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Cut Tape & Digi-Reel	No	88009
74HC138D-Q100,118	Nexperia USA Inc.	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Tape & Reel	Yes (AEC-Q100)	8386
74HC138S16-13	Diodes Incorporated	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Tape & Reel	No	3450
74HC237D	Toshiba Semiconductor and Storage	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Cut Tape & Digi-Reel	No	10300
74HC237D,653	Nexperia USA Inc.	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Tape & Reel	No	27520
74HC237D-Q100J	Nexperia USA Inc.	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Tape & Reel	Yes (AEC-Q100)	3365
74HC238D	Toshiba Semiconductor and Storage	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	Cut Tape & Digi-Reel	No	100300
74HC238D,653	NXP Semiconductors	1 x 3:8	5.2 / 5.2	2 ~ 6	-40 ~ 125	16-SOIC	-	No	2300

Engineering Selection Recommendations

All listed substitute parts maintain identical electrical specifications and package dimensions, ensuring direct functional compatibility with the 74HC138D/AUJ. Selection among substitutes should be based on the following criteria:

Standard Commercial Applications: Parts 74HC138D (Toshiba), 74HC138D,653 (Nexperia), 74HC138S16-13 (Diodes), 74HC237D (Toshiba), 74HC237D,653 (Nexperia), and 74HC238D (Toshiba) are suitable for general-purpose logic applications. These parts are ROHS3 compliant and carry Active product status.

Automotive and High-Reliability Applications: Parts 74HC138D-Q100,118 (Nexperia) and 74HC237D-Q100J (Nexperia) include AEC-Q100 automotive qualification, appropriate for applications requiring automotive-grade components and enhanced reliability screening.

Packaging Format Considerations: Cut Tape & Digi-Reel format (Toshiba and Nexperia variants) supports both manual and automated assembly processes. Tape & Reel format (Nexperia and Diodes variants) is optimized for high-volume automated pick-and-place assembly. Selection depends on manufacturing process requirements.

Inventory Availability: Toshiba 74HC238D offers the highest inventory level (100,300 pcs), followed by Toshiba 74HC138D (300,300 pcs), providing supply chain flexibility for high-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can 74HC137D,653 be used as a direct replacement for 74HC138D/AUJ? A: Yes. Both parts share identical electrical specifications (1 x 3:8 decoder configuration, 5.2mA output current, 2V to 6V supply voltage, -40°C to 125°C operating range) and 16-SOIC package format. The primary difference is packaging format (Tape & Reel vs. unspecified) and manufacturer (Nexperia vs. NXP).

Q: What is the difference between 74HC138D and 74HC237D? A: Both parts are functionally equivalent 1 x 3:8 decoders with identical electrical and thermal specifications. The base product numbers (74HC138 vs. 74HC237) indicate different decoder variants, but all listed variants maintain the same circuit configuration and performance parameters required for substitution.

Q: Are automotive-qualified versions (AEC-Q100) compatible with standard commercial designs? A: Yes. Parts 74HC138D-Q100,118 and 74HC237D-Q100J maintain all electrical and mechanical specifications of standard variants. Automotive qualification represents additional screening and reliability assurance and does not restrict use in non-automotive applications.

Q: Does packaging format (Cut Tape vs. Tape & Reel) affect electrical performance? A: No. Packaging format affects only the physical delivery and handling method for assembly processes. Electrical performance, thermal characteristics, and functional behavior remain identical across all packaging formats.

Q: Can I mix manufacturers in a single production run? A: Yes. All listed parts meet ROHS3 compliance and maintain identical electrical specifications, package dimensions, and operating parameters. Multi-source procurement from NXP, Nexperia, Toshiba, and Diodes is electrically and mechanically compatible.

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