74ACT157MTC Equivalent & Substitute Parts

Part Overview

The 74ACT157MTC is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-TSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 74ACT series multiplexer performs signal routing and selection functions in digital logic applications, with electrical characteristics suitable for standard TTL-compatible systems operating at 4.5V to 5.5V supply voltage.

Substiute Parts

74ACT157MTC

onsemiIn Stock: 105374ACT157MTC Datasheet

Current PartRFQ

MC74ACT157DTR2G

onsemiIn Stock: 37744MC74ACT157DTR2G Datasheet

DirectRFQ

CD74ACT157PW

Texas InstrumentsIn Stock: 1799CD74ACT157PW Datasheet

SimilarRFQ

CD74ACT157PWR

Texas InstrumentsIn Stock: 913CD74ACT157PWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT157MTC is determined by the following critical parameters that must remain constant across all equivalent parts:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-TSSOP surface mount
• Voltage supply range: 4.5V ~ 5.5V
• Output current capability: 24mA high and low
• Series classification: 74ACT logic family
• Independent circuits: 1

The substitute parts identified below maintain these core electrical and mechanical specifications. Differences in product status, operating temperature range, packaging format (tube vs. tape & reel), and manufacturer do not affect functional interchangeability within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

MC74ACT157DTR2G (onsemi) is the primary direct substitute for the 74ACT157MTC. Both parts are manufactured by onsemi, share identical electrical specifications and operating temperature range, and are packaged in 16-TSSOP format. MC74ACT157DTR2G maintains active product status and ROHS3 compliance, providing long-term availability and regulatory alignment. This part is supplied in tape & reel format suitable for automated assembly.

CD74ACT157PWR (Texas Instruments) is an active alternative from a second-source manufacturer. This part meets all core electrical and mechanical requirements with an extended operating temperature range of -55°C to 125°C, providing additional thermal margin for demanding applications. ROHS3 compliance and active product status ensure continued supply. Tape & reel packaging supports high-volume production.

CD74ACT157PW (Texas Instruments) is a functionally equivalent alternative with extended operating temperature range (-55°C to 125°C) and ROHS3 compliance. This part is discontinued at DiGi Electronics but remains available through alternative distribution channels. Tube packaging is suitable for lower-volume applications or manual assembly processes.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT157DTR2G directly replace 74ACT157MTC in existing designs?

A: Yes. Both parts share identical circuit configuration (4 x 2:1 multiplexer), package type (16-TSSOP), voltage supply range (4.5V ~ 5.5V), and output current specifications (24mA). The parts are pin-compatible and functionally interchangeable. MC74ACT157DTR2G is supplied in tape & reel format rather than tube, which affects procurement and assembly handling but not electrical performance.

Q: What is the difference between CD74ACT157PW and CD74ACT157PWR?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications and 16-TSSOP packaging. The primary difference is packaging format: CD74ACT157PW is supplied in tube format, while CD74ACT157PWR is supplied in tape & reel format. CD74ACT157PWR is recommended for automated assembly and high-volume production. Both parts have extended operating temperature range (-55°C to 125°C) compared to the original 74ACT157MTC.

Q: Are all substitute parts ROHS3 compliant?

A: MC74ACT157DTR2G, CD74ACT157PW, and CD74ACT157PWR are all ROHS3 compliant. The original 74ACT157MTC does not specify RoHS status. All substitute parts meet current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: Which substitute part offers the widest operating temperature range?

A: Both CD74ACT157PW and CD74ACT157PWR (Texas Instruments) operate across -55°C to 125°C, compared to -40°C to 85°C for the original 74ACT157MTC and MC74ACT157DTR2G. The extended temperature range provides additional design margin for applications requiring operation in extreme thermal environments.

Q: What inventory considerations apply to these substitute parts?

A: MC74ACT157DTR2G has the highest inventory availability (37,688 pcs), followed by CD74ACT157PW (1,689 pcs) and CD74ACT157PWR (857 pcs). For production continuity, MC74ACT157DTR2G is the recommended choice due to superior stock levels and active manufacturer status.