CD74HC238PWRG4 Equivalent & Substitute Parts

Part Overview

The CD74HC238PWRG4 is a decoder/demultiplexer logic integrated circuit manufactured by Texas Instruments, featuring a 1 x 3:8 circuit configuration in a 16-TSSOP surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates across a 2V to 6V supply range with symmetric output current characteristics of 5.2mA for both high and low states, suitable for general-purpose logic applications requiring address decoding or demultiplexing functions.

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	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Series	74HC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD74HC238PWRG4 is determined by strict equivalence across the following critical parameters: decoder/demultiplexer type with 1 x 3:8 circuit configuration, output current specifications (5.2mA high and low), single supply voltage operation within 2V to 6V range, operating temperature range of -55°C to 125°C, 16-TSSOP surface mount package, and ROHS3 compliance. Substitute parts are grouped into three categories based on manufacturer and product status:

MFR Recommended Substitutes (Texas Instruments): CD74HC238PWR and CD74HC238PWT maintain identical base product specifications with active or discontinued status variations, differing only in packaging format (Cut Tape & Digi-Reel versus Tape & Reel).

Parametric Equivalents (Texas Instruments): CD74HC137PWR, CD74HC137PWT, CD74HC237PWR, and CD74HC237PWT share all critical electrical and mechanical parameters but use different base product numbers (74HC137 and 74HC237), indicating functional equivalence within the 74HC decoder/demultiplexer family.

Direct Manufacturer Alternatives: MC74HC238ADTR2G (onsemi) and MC74HC138ADTR2G (onsemi) provide equivalent functionality from an alternative manufacturer while maintaining identical electrical specifications and package format.

Cross-Manufacturer Alternatives (Nexperia): 74HC238PW,118 and 74HC238PW-Q100J offer substitution from Nexperia USA Inc., with the latter providing automotive-grade qualification (AEC-Q100) and operating temperature range of -40°C to 125°C.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Packaging	Circuit	Output Current (mA)	Supply Voltage	Temp Range (°C)	Package Type	Inventory (Pcs)
CD74HC238PWRG4	Texas Instruments	Discontinued at DiGi Electronics	-	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	664
CD74HC238PWR	Texas Instruments	Active	Cut Tape & Digi-Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	17896
CD74HC238PWT	Texas Instruments	Discontinued at DiGi Electronics	Tape & Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	2352
CD74HC137PWR	Texas Instruments	Active	Tape & Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	1112
CD74HC137PWT	Texas Instruments	Discontinued at DiGi Electronics	Tape & Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	1136
CD74HC237PWR	Texas Instruments	Active	Cut Tape & Digi-Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	1816
CD74HC237PWT	Texas Instruments	Discontinued at DiGi Electronics	Tape & Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	2111
MC74HC238ADTR2G	onsemi	Active	Cut Tape & Digi-Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	14012
MC74HC138ADTR2G	onsemi	Active	Cut Tape & Digi-Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-TSSOP	16617
74HC238PW,118	Nexperia USA Inc.	Active	Cut Tape & Digi-Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-40 ~ 125	16-TSSOP	7077
74HC238PW-Q100J	Nexperia USA Inc.	Active	Tape & Reel	1 x 3:8	5.2 / 5.2	2V ~ 6V	-40 ~ 125	16-TSSOP	907

Engineering Selection Recommendations

For applications requiring immediate procurement with maximum inventory availability, CD74HC238PWR (Texas Instruments, 17,896 pcs) or MC74HC138ADTR2G (onsemi, 16,617 pcs) are preferred selections, both maintaining active product status and identical electrical specifications to the original CD74HC238PWRG4.

For applications with extended temperature requirements below -40°C, the original CD74HC238PWRG4 specification of -55°C minimum operating temperature is maintained by Texas Instruments alternatives (CD74HC238PWR, CD74HC238PWT, CD74HC137PWR, CD74HC137PWT, CD74HC237PWR, CD74HC237PWT) and onsemi alternatives (MC74HC238ADTR2G, MC74HC138ADTR2G). Nexperia parts (74HC238PW,118 and 74HC238PW-Q100J) operate to -40°C minimum.

For automotive applications requiring AEC-Q100 qualification, 74HC238PW-Q100J (Nexperia) is the sole option among listed substitutes, providing automotive-grade certification with active product status.

All listed substitutes maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and identical 16-TSSOP package specifications, ensuring direct mechanical and electrical compatibility within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can CD74HC238PWR directly replace CD74HC238PWRG4? A: Yes. CD74HC238PWR is the MFR recommended substitute from Texas Instruments, maintaining identical electrical specifications (1 x 3:8 decoder/demultiplexer, 5.2mA output current, 2V to 6V supply, -55°C to 125°C operating range) and 16-TSSOP package format. The difference is packaging format (Cut Tape & Digi-Reel versus the original specification) and active product status versus discontinued.

Q: What is the difference between CD74HC238 and CD74HC137 or CD74HC237? A: All three base product numbers (74HC238, 74HC137, 74HC237) share identical electrical parameters and package specifications as listed in this reference. They are parametric equivalents within the 74HC decoder/demultiplexer family. Functional differences between these variants are not specified in the provided parameters and require datasheet consultation for application-specific requirements.

Q: Are onsemi MC74HC238ADTR2G and MC74HC138ADTR2G interchangeable with Texas Instruments parts? A: Yes, within the constraints of the provided parameters. Both onsemi parts maintain identical electrical specifications (5.2mA output current, 2V to 6V supply, -55°C to 125°C operating range) and 16-TSSOP package format. Both are active products with higher inventory availability than some Texas Instruments alternatives.

Q: Can Nexperia 74HC238PW,118 be used in applications requiring -55°C operation? A: No. Nexperia parts (74HC238PW,118 and 74HC238PW-Q100J) specify a minimum operating temperature of -40°C, which does not meet the -55°C to 125°C range of the original CD74HC238PWRG4. For applications requiring -55°C minimum operation, use Texas Instruments or onsemi alternatives.

Q: What is the significance of the AEC-Q100 qualification on 74HC238PW-Q100J? A: AEC-Q100 qualification indicates automotive-grade reliability testing and is required for automotive applications. This part is the only listed substitute with this certification. For non-automotive applications, this qualification is not a requirement.

Q: Does packaging format (Cut Tape & Digi-Reel versus Tape & Reel) affect electrical compatibility? A: No. Packaging format affects procurement and handling logistics only. Electrical and mechanical specifications remain identical across all packaging variants. Selection should be based on procurement requirements and inventory availability.

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