CD74HCT157MT Equivalent & Substitute Parts

Part Overview

The CD74HCT157MT is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in 16-SOIC surface mount packaging. This part is designated as Last Time Buy, indicating discontinued production status. The device operates with single supply voltage (4.5V ~ 5.5V) and is suitable for digital signal routing and selection applications requiring 4-channel multiplexing functionality.

Due to Last Time Buy status, equivalent substitute parts are necessary for ongoing design support and production continuity. Suitable alternatives maintain identical electrical specifications and package compatibility while offering active product status from alternative manufacturers.

Substiute Parts

CD74HCT157MT

Texas InstrumentsIn Stock: 2385CD74HCT157MT Datasheet

Current PartRFQ

CD74HCT157M96

Texas InstrumentsIn Stock: 4962CD74HCT157M96 Datasheet

Parametric EquivalentRFQ

74HC688D,653

Nexperia USA Inc.In Stock: 496474HC688D,653 Datasheet

MFR RecommendedRFQ

74HCT157D,652

NXP SemiconductorsIn Stock: 1789974HCT157D,652 Datasheet

MFR RecommendedRFQ

74HCT157D,653

Nexperia USA Inc.In Stock: 128774HCT157D,653 Datasheet

MFR RecommendedRFQ

74HCT157D-Q100,118

NXP USA Inc.In Stock: 618274HCT157D-Q100,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74HCT157MT are classified based on strict electrical and mechanical parameter equivalence. The primary substitution criteria are:

Critical Parameters for Substitution:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-SOIC surface mount
• Voltage supply range: 4.5V ~ 5.5V
• Output current capability: 4mA / 4mA
• Base product number: 74HCT157 series

Parametric Equivalent Category: Parts maintaining identical electrical specifications and 16-SOIC packaging with active product status qualify as direct parametric equivalents. CD74HCT157M96 (Texas Instruments) meets all electrical and mechanical requirements.

Manufacturer Recommended Alternatives: NXP Semiconductors and Nexperia USA Inc. offer 74HCT157 series variants (74HCT157D,652; 74HCT157D,653; 74HCT157D-Q100,118) with identical circuit configuration and package specifications. These parts maintain compatibility across all critical electrical parameters while offering active production status and alternative packaging options (Bulk, Tape & Reel).

Non-Equivalent Part: 74HC688D,653 (Nexperia USA Inc.) is a magnitude comparator with different circuit topology (8-bit identity comparator vs. 4 x 2:1 multiplexer) and incompatible package (20-SOIC vs. 16-SOIC). This part does not qualify as a functional substitute.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CD74HCT157M96 This Texas Instruments part provides complete electrical and mechanical equivalence to the CD74HCT157MT. Both parts share identical voltage supply range (4.5V ~ 5.5V), output current specifications (4mA / 4mA), operating temperature range (-55°C ~ 125°C), and 16-SOIC packaging. CD74HCT157M96 maintains active product status with higher inventory availability (4928 Pcs vs. 2345 Pcs). RoHS3 compliance and MSL 1 rating are identical. This part is the preferred direct replacement.

Secondary Substitutes: 74HCT157D Series (NXP/Nexperia) The 74HCT157D,652, 74HCT157D,653, and 74HCT157D-Q100,118 variants from NXP Semiconductors and Nexperia USA Inc. maintain identical circuit configuration and 16-SOIC packaging with matching voltage supply and output current specifications. Operating temperature range is reduced to -40°C ~ 125°C (vs. -55°C ~ 125°C on main part). These alternatives are suitable for applications not requiring extended low-temperature operation below -40°C. The 74HCT157D-Q100,118 variant includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

Non-Equivalent Part: 74HC688D,653 This part is not suitable as a substitute. The 74HC688D,653 is an 8-bit magnitude comparator with fundamentally different circuit topology and function. The 20-SOIC package is incompatible with 16-SOIC PCB layouts. This part does not meet substitution criteria.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT157M96 be used as a direct replacement for CD74HCT157MT? A: Yes. CD74HCT157M96 is a parametric equivalent with identical electrical specifications (4.5V ~ 5.5V supply, 4mA output current, -55°C ~ 125°C operating range) and 16-SOIC packaging. Both parts are manufactured by Texas Instruments and share the same base product number (74HCT157). Pin-for-pin compatibility is maintained.

Q: What is the difference between 74HCT157D,652 and 74HCT157D,653? A: Both parts are functionally identical 4 x 2:1 multiplexers with matching electrical specifications and 16-SOIC packaging. The primary difference is packaging format: 74HCT157D,652 is supplied in Bulk packaging, while 74HCT157D,653 is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q: Why is 74HC688D,653 listed as a substitute but not recommended? A: 74HC688D,653 is not a functional substitute. It is an 8-bit magnitude comparator (different circuit type) in 20-SOIC packaging (incompatible with 16-SOIC layouts). It does not meet the electrical or mechanical requirements for multiplexer applications. This part was included in the original substitute list but does not qualify for engineering selection.

Q: Does operating temperature range affect substitution compatibility? A: Operating temperature range is a critical parameter. CD74HCT157MT and CD74HCT157M96 support -55°C ~ 125°C operation. The 74HCT157D series (NXP/Nexperia) supports -40°C ~ 125°C. For applications requiring operation below -40°C, only CD74HCT157M96 is suitable. For applications within -40°C ~ 125°C range, both options are compatible.

Q: Is the 74HCT157D-Q100,118 suitable for non-automotive applications? A: Yes. The 74HCT157D-Q100,118 is an automotive-qualified variant (AEC-Q100) with identical electrical specifications and 16-SOIC packaging. AEC-Q100 qualification indicates enhanced reliability testing and quality assurance. This part is suitable for both automotive and general industrial applications requiring equivalent performance specifications.

Q: What is the significance of RoHS3 compliance status? A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. CD74HCT157MT, CD74HCT157M96, and 74HCT157D,653 are explicitly RoHS3 compliant. For applications requiring RoHS3 certification, these parts are preferred. Compliance status for 74HCT157D,652 and 74HCT157D-Q100,118 is not specified in available documentation.

Q: Can these parts be used interchangeably in existing PCB designs? A: Yes, for designs using 16-SOIC surface mount footprints. All recommended substitute parts (CD74HCT157M96 and 74HCT157D series) share identical pin configurations and package dimensions (16-SOIC, 0.154" width, 3.90mm). PCB layout modifications are not required. Electrical compatibility is maintained across all specified parameters.