74AC157MTC Equivalent & Substitute Parts

Part Overview

The 74AC157MTC 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

74AC157MTC

onsemiIn Stock: 103274AC157MTC Datasheet

Current PartRFQ

MC74AC157DTR2G

onsemiIn Stock: 3271MC74AC157DTR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC157MTC is based on strict equivalence across the following critical parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Electrical output characteristics: 24mA high and low output current
• Supply voltage range: 2V ~ 6V single supply operation
• Package form factor: 16-TSSOP with identical 0.173" (4.40mm) width
• Temperature operating range: -40°C ~ 85°C
• Moisture sensitivity classification: MSL 1

The MC74AC157DTR2G meets all these criteria and is manufactured by the same supplier, ensuring functional and mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

The MC74AC157DTR2G is the direct substitute for the obsolete 74AC157MTC. Both components share identical electrical and mechanical specifications, enabling pin-for-pin replacement without circuit modification.

The MC74AC157DTR2G carries Active product status and ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete 74AC157MTC. Selection of the MC74AC157DTR2G is recommended for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the MC74AC157DTR2G replace the 74AC157MTC in existing designs?

A: Yes. Both parts are identical in electrical performance, pin configuration, and package dimensions. Direct substitution is possible without circuit redesign.

Q: What is the difference between 74AC157MTC and MC74AC157DTR2G?

A: The primary difference is product status. The 74AC157MTC is obsolete, while the MC74AC157DTR2G is active. The MC74AC157DTR2G also carries ROHS3 compliance. All electrical and mechanical parameters are equivalent.

Q: Are there packaging differences between these parts?

A: No. Both components use the 16-TSSOP package with identical dimensions (0.173" width, 4.40mm). Mounting type and PCB footprint are identical.

Q: What does MSL 1 (Unlimited) mean for these components?

A: MSL 1 indicates the lowest moisture sensitivity level. These components have unlimited shelf life under standard storage conditions and do not require special moisture control during handling or storage.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both the 74AC157MTC and MC74AC157DTR2G are REACH Unaffected and classified as EAR99 for export control purposes. The MC74AC157DTR2G additionally meets ROHS3 requirements.