74AC157MTCX Equivalent & Substitute Parts

Part Overview

The 74AC157MTCX is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-TSSOP surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The substitute part maintains identical electrical specifications and mechanical compatibility, enabling direct replacement in existing applications.

Substiute Parts

74AC157MTCX

onsemiIn Stock: 365074AC157MTCX Datasheet

Current PartRFQ

MC74AC157DTR2G

onsemiIn Stock: 3271MC74AC157DTR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MC74AC157DTR2G qualifies as a direct substitute based on the following critical parameters:

• Identical multiplexer circuit configuration (4 x 2:1)
• Matching output current specifications (24mA high, 24mA low)
• Identical supply voltage range (2V ~ 6V)
• Identical operating temperature range (-40°C ~ 85°C)
• Identical package and pinout (16-TSSOP, 0.173" width)
• Same series classification (74AC)
• Equivalent moisture sensitivity level (MSL 1)

The substitute part is manufactured by the same supplier (onsemi) and maintains full electrical and mechanical compatibility with the original component.

Parameter Comparison

Engineering Selection Recommendations

The MC74AC157DTR2G is the qualified substitute for the obsolete 74AC157MTCX. Selection of the active substitute part is justified by:

• Complete electrical parameter equivalence across all specified operating conditions
• Identical mechanical compatibility and pinout configuration
• Active product status ensuring ongoing availability and supply chain continuity
• RoHS3 compliance certification on the substitute part, meeting current regulatory requirements
• Equivalent environmental and handling specifications (MSL 1, REACH Unaffected)

The substitute part is suitable for direct replacement in all applications where the original 74AC157MTCX was specified.

Frequently Asked Questions (FAQ)

Q: Can MC74AC157DTR2G replace 74AC157MTCX in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The substitute part maintains the same pinout, package dimensions, and electrical characteristics, enabling direct replacement without circuit modification.

Q: What is the difference between the two part numbers?

A: The primary difference is product status. The 74AC157MTCX is obsolete, while MC74AC157DTR2G is active. The packaging designation differs (MTCX vs. DTR2G), but both use the 16-TSSOP package. The substitute part includes RoHS3 compliance certification.

Q: Are there any supply voltage or temperature limitations when substituting?

A: No. Both parts operate identically across the full specified range of 2V to 6V supply voltage and -40°C to 85°C operating temperature. No derating or operational adjustments are required.

Q: Does the packaging format affect compatibility?

A: Both parts use the 16-TSSOP surface mount package with identical dimensions (0.173" width, 4.40mm). The packaging format is fully compatible for PCB assembly and soldering processes.

Q: Is the substitute part RoHS compliant?

A: Yes. MC74AC157DTR2G is RoHS3 compliant. The original 74AC157MTCX does not specify RoHS status but is REACH Unaffected, as is the substitute part.