SN74ACT245PWG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT245PWG4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 1 element with 8 bits per element and 3-state output capability in a 20-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Suitable alternatives maintain identical electrical specifications and package compatibility while offering active product status or improved availability.

Substiute Parts

SN74ACT245PWG4

Texas InstrumentsIn Stock: 1000SN74ACT245PWG4 Datasheet

Current PartRFQ

SN74ACT245PWR

Texas InstrumentsIn Stock: 3994SN74ACT245PWR Datasheet

DirectRFQ

74ACT245MTCX

onsemiIn Stock: 395074ACT245MTCX Datasheet

DirectRFQ

MC74ACT245DTR2G

onsemiIn Stock: 5441MC74ACT245DTR2G Datasheet

MFR RecommendedRFQ

74ACT245MTC

onsemiIn Stock: 195274ACT245MTC Datasheet

Parametric EquivalentRFQ

MC74ACT245DTG

onsemiIn Stock: 1677MC74ACT245DTG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ACT245PWG4 are classified based on the following criteria:

Direct Substitutes maintain identical electrical and mechanical specifications with the main part. These parts share the same base product number (74ACT245), logic type (non-inverting transceiver), element and bit configuration (1 element, 8 bits), output type (3-state), current ratings (24mA), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and package type (20-TSSOP surface mount). Differences exist only in packaging format (Cut Tape & Digi-Reel, Tape & Reel, or Tube) and product status (Active or Obsolete).

Parametric Equivalents provide identical functional and electrical performance but may have different product status or limited availability. These parts meet all core electrical requirements and package specifications required for functional interchangeability.

The following parameters determine substitution eligibility:

• Base product number: 74ACT245
• Logic type: Non-inverting transceiver
• Element and bit configuration: 1 element, 8 bits per element
• Output type: 3-state
• Current ratings: 24mA output high and low
• Supply voltage: 4.5V ~ 5.5V
• Operating temperature: -40°C ~ 85°C
• Package: 20-TSSOP surface mount
• RoHS and MSL compliance

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74ACT245PWR

The SN74ACT245PWR from Texas Instruments is the preferred substitute. It maintains active product status, ensuring long-term availability and supply chain stability. This part is electrically and mechanically identical to the SN74ACT245PWG4, with the only difference being packaging format (Cut Tape & Digi-Reel versus the original specification). Both parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating.

Secondary Recommendation: 74ACT245MTCX

The 74ACT245MTCX from onsemi provides an alternative from a different manufacturer while maintaining active product status. This part meets all electrical and mechanical requirements and is ROHS3 compliant. It is available in Cut Tape & Digi-Reel packaging format.

Manufacturer-Recommended Alternative: MC74ACT245DTR2G

The MC74ACT245DTR2G is designated as the manufacturer-recommended substitute by onsemi. This part carries active product status and is available in Tape & Reel packaging. It provides the highest inventory availability (5400 Pcs) among all substitutes and maintains full compliance with RoHS3 and MSL Level 1 specifications.

Obsolete Alternatives: 74ACT245MTC and MC74ACT245DTG

The 74ACT245MTC and MC74ACT245DTG are parametric equivalents with obsolete product status. These parts meet all electrical specifications but are no longer actively manufactured. They should be considered only when active alternatives are unavailable and existing inventory can be verified.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ACT245PWR as a direct replacement for SN74ACT245PWG4?

A: Yes. The SN74ACT245PWR is electrically and mechanically identical to the SN74ACT245PWG4. Both parts feature the same logic type (non-inverting transceiver), element configuration (1 element, 8 bits), output type (3-state), current ratings (24mA), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 20-TSSOP package. The only difference is packaging format and product status. The SN74ACT245PWR is currently active and widely available.

Q: What is the difference between the various packaging formats listed?

A: Packaging format refers to how the component is supplied. Cut Tape & Digi-Reel format is suitable for automated pick-and-place assembly. Tape & Reel format is optimized for high-volume production runs. Tube packaging is typically used for lower-volume applications. All three formats contain the identical IC in the same 20-TSSOP package; the difference is only in the carrier medium and quantity per reel or tube.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (SN74ACT245PWR, 74ACT245MTCX, MC74ACT245DTR2G, 74ACT245MTC, and MC74ACT245DTG) are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original SN74ACT245PWG4 specifications.

Q: Why should I avoid the obsolete parts (74ACT245MTC and MC74ACT245DTG)?

A: These parts have obsolete product status, meaning they are no longer actively manufactured. While they are parametric equivalents with identical electrical specifications, their availability is limited to existing inventory. For new designs or production runs, active alternatives such as SN74ACT245PWR or 74ACT245MTCX are recommended to ensure long-term supply chain reliability.

Q: Can I mix different substitute parts in the same design?

A: Yes. All substitute parts are functionally and electrically interchangeable. However, for production consistency and supply chain management, it is recommended to standardize on a single part number per design revision.

Q: What is the difference between a "Direct Substitute" and a "Parametric Equivalent"?

A: Direct substitutes are parts with identical specifications and active product status, differing only in packaging format. Parametric equivalents meet all electrical and mechanical requirements but may have different product status (such as obsolete). Both categories are functionally interchangeable in circuit applications.