CD74HC237M Equivalent & Substitute Parts

Part Overview

The CD74HC237M is a decoder/demultiplexer integrated circuit manufactured by Texas Instruments, featuring a 1 x 3:8 configuration in a 16-SOIC surface mount package. This logic component is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The part operates across a 2V to 6V supply range with symmetric output current characteristics of 5.2mA for both high and low states, making it suitable for standard TTL-compatible 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-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC237M is determined by strict equivalence across 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, surface mount packaging in 16-SOIC form factor, and MSL rating of 1 (Unlimited). Parts meeting these criteria are classified into three substitution categories:

Direct Manufacturer Substitutes: Parts from the same manufacturer (Texas Instruments) with identical electrical specifications and packaging, differing only in distribution format (Tape & Reel versus bulk).

Parametric Equivalents: Parts from alternative manufacturers (Harris Corporation, onsemi) with identical electrical and mechanical specifications, including circuit configuration, output current, supply voltage range, and package dimensions.

Manufacturer Recommended Alternatives: Parts from NXP Semiconductors (Nexperia) with equivalent functional specifications, available in both bulk and Tape & Reel formats, with active product status and full RoHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Circuit Config	Output Current (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status	RoHS Status
CD74HC237M	Texas Instruments	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-SOIC	Discontinued	ROHS3
CD74HC237M96	Texas Instruments	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-SOIC	Active	ROHS3
CD74HC138M	Harris Corporation	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-SOIC	Obsolete	Non-compliant
CD74HC238M	Harris Corporation	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-SOIC	Obsolete	Non-compliant
74HC237D,652	NXP Semiconductors	1 x 3:8	5.2 / 5.2	2V ~ 6V	-40 ~ 125	16-SOIC	Active	ROHS3
74HC237D,653	Nexperia USA Inc.	1 x 3:8	5.2 / 5.2	2V ~ 6V	-40 ~ 125	16-SOIC	Active	ROHS3
MC74HC138ADG	onsemi	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-SOIC	Active	ROHS3
MC74HC238ADG	onsemi	1 x 3:8	5.2 / 5.2	2V ~ 6V	-55 ~ 125	16-SOIC	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation: CD74HC237M96 (Texas Instruments) is the optimal direct substitute, maintaining identical electrical specifications and packaging while offering active product status and full ROHS3 compliance. This part is available in Tape & Reel format with 1630 units in stock.

Secondary Recommendations: 74HC237D,653 (Nexperia USA Inc.) and 74HC237D,652 (NXP Semiconductors) provide functionally equivalent alternatives with active product status and ROHS3 compliance. Both parts feature the same circuit configuration and output current specifications. The 74HC237D,653 variant is available in Tape & Reel format with 27520 units in stock, while 74HC237D,652 is available in bulk format with 49961 units in stock. The operating temperature range for NXP parts is -40°C to 125°C, which is narrower than the original CD74HC237M specification of -55°C to 125°C.

Alternative Options: MC74HC138ADG and MC74HC238ADG (onsemi) are parametric equivalents with active product status, ROHS3 compliance, and the full -55°C to 125°C operating temperature range. These parts maintain all critical electrical parameters and are available in Tube packaging.

Parts to Avoid: CD74HC138M and CD74HC238M (Harris Corporation) are obsolete with non-compliant RoHS status and should not be selected for new designs or long-term applications.

Frequently Asked Questions (FAQ)

Q: Can CD74HC237M96 be used as a direct replacement for CD74HC237M?

A: Yes. CD74HC237M96 is a direct substitute from the same manufacturer with identical electrical specifications, circuit configuration, output current, supply voltage range, operating temperature range, and 16-SOIC package. The primary difference is the distribution format (Tape & Reel versus bulk) and active product status.

Q: What is the difference between the NXP 74HC237D,652 and 74HC237D,653 variants?

A: Both parts are functionally equivalent with identical electrical specifications and 16-SOIC packaging. The primary difference is packaging format: 74HC237D,652 is supplied in bulk, while 74HC237D,653 is supplied in Tape & Reel format. Both maintain ROHS3 compliance and active product status.

Q: Are there temperature range considerations when substituting with NXP parts?

A: Yes. NXP Semiconductors parts (74HC237D,652 and 74HC237D,653) specify an operating temperature range of -40°C to 125°C, which is narrower than the original CD74HC237M range of -55°C to 125°C. If your application requires operation below -40°C, select alternatives with the full -55°C to 125°C range, such as CD74HC237M96, MC74HC138ADG, or MC74HC238ADG.

Q: Why are Harris Corporation parts (CD74HC138M and CD74HC238M) not recommended?

A: Both Harris Corporation parts are obsolete with non-compliant RoHS status. For new designs and applications requiring long-term component availability and regulatory compliance, active parts with ROHS3 certification should be selected.

Q: Can onsemi MC74HC138ADG or MC74HC238ADG be used as substitutes?

A: Yes. Both onsemi parts are parametric equivalents with identical electrical specifications, 16-SOIC packaging, active product status, and ROHS3 compliance. They maintain the full -55°C to 125°C operating temperature range and are available in Tube packaging format.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (CD74HC237M96, 74HC237D,653), Bulk (74HC237D,652), and Tube (MC74HC138ADG, MC74HC238ADG). Selection should be based on assembly requirements and procurement volume.

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