74ACT245MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT245MTCX is a non-inverting transceiver logic integrated circuit manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This device operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-TSSOP surface mount package. The part is currently active in production and widely used in digital logic applications requiring bus buffering and signal isolation. Equivalent and substitute parts are identified based on matching electrical specifications, functional characteristics, and package compatibility to support component procurement flexibility and supply chain continuity.

Substiute Parts

74ACT245MTCX

onsemiIn Stock: 395074ACT245MTCX Datasheet

Current PartRFQ

MC74ACT245DTR2G

onsemiIn Stock: 5441MC74ACT245DTR2G Datasheet

DirectRFQ

MC74ACT245DTG

onsemiIn Stock: 1677MC74ACT245DTG Datasheet

SimilarRFQ

SN74ACT245DBR

Texas InstrumentsIn Stock: 5490SN74ACT245DBR Datasheet

SimilarRFQ

SN74ACT245PWR

Texas InstrumentsIn Stock: 3994SN74ACT245PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACT245MTCX are classified based on the following substitution criteria:

Direct Substitutes (Identical Electrical and Mechanical Parameters): Parts that match all key electrical specifications (logic type, bit configuration, output current, supply voltage, operating temperature range) and package type (20-TSSOP) with only packaging format differences (Cut Tape vs. Tape & Reel).

Similar Substitutes (Matching Electrical Parameters with Package Variations): Parts that maintain identical electrical specifications but utilize alternative package formats (20-SSOP vs. 20-TSSOP) or product status variations. These require PCB layout verification due to dimensional differences.

Parametric Equivalents (Identical Electrical Specifications, Same Package): Parts from alternative manufacturers that provide identical functional and electrical performance within the same package footprint.

The following parameters determine substitution eligibility:

• Logic Type: Transceiver, Non-Inverting
• Bit Configuration: 1 Element, 8 Bits per Element
• Output Type: 3-State
• Output Current: 24mA (High and Low)
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C
• Package Footprint: 20-TSSOP or 20-SSOP

Parameter Comparison

Engineering Selection Recommendations

MC74ACT245DTR2G (onsemi): This part is a direct electrical and functional equivalent to the 74ACT245MTCX with identical specifications. The primary difference is packaging format (Tape & Reel vs. Cut Tape & Digi-Reel). This part is recommended for high-volume production environments where Tape & Reel packaging is preferred. Product status is Active with full ROHS3 compliance and MSL 1 rating.

MC74ACT245DTG (onsemi): This part maintains identical electrical specifications but is packaged in Tube format and carries an Obsolete product status. While electrically compatible, procurement of this part is not recommended for new designs due to its obsolete status and potential supply discontinuation.

SN74ACT245PWR (Texas Instruments): This part is a parametric equivalent from Texas Instruments with identical electrical specifications and 20-TSSOP package footprint. It is recommended as an alternative source for supply chain diversification. Product status is Active with full ROHS3 compliance and MSL 1 rating.

SN74ACT245DBR (Texas Instruments): This part is electrically equivalent but uses a 20-SSOP package (0.209", 5.30mm Width) compared to the 20-TSSOP package (0.173", 4.40mm Width) of the main part. PCB layout and footprint verification is required before substitution. Product status is Active with full ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT245DTR2G be used as a direct replacement for 74ACT245MTCX?

A: Yes. MC74ACT245DTR2G is electrically and functionally identical to 74ACT245MTCX. The only difference is the packaging format (Tape & Reel vs. Cut Tape & Digi-Reel). Both parts share the same 20-TSSOP package footprint and can be used interchangeably on the same PCB.

Q: What is the difference between 20-TSSOP and 20-SSOP packages?

A: The 20-TSSOP package has a width of 0.173" (4.40mm), while the 20-SSOP package has a width of 0.209" (5.30mm). These are different package footprints and require separate PCB designs. SN74ACT245DBR uses the wider 20-SSOP package and cannot be used as a direct drop-in replacement without PCB modification.

Q: Is MC74ACT245DTG still available for new designs?

A: MC74ACT245DTG carries an Obsolete product status. While inventory may be available, this part is not recommended for new designs due to potential supply discontinuation. Use MC74ACT245DTR2G or SN74ACT245PWR instead.

Q: Can I substitute SN74ACT245PWR from Texas Instruments for the onsemi 74ACT245MTCX?

A: Yes. SN74ACT245PWR is a parametric equivalent with identical electrical specifications and the same 20-TSSOP package footprint. Both parts are Active in production status and fully ROHS3 compliant. This substitution is suitable for supply chain diversification.

Q: What are the key electrical parameters that must match for substitution?

A: The critical parameters are: Logic Type (Transceiver, Non-Inverting), Bit Configuration (1 Element, 8 Bits), Output Type (3-State), Output Current (24mA High/Low), Supply Voltage (4.5V ~ 5.5V), and Operating Temperature Range (-40°C ~ 85°C). All listed substitute parts match these specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (MC74ACT245DTR2G, MC74ACT245DTG, SN74ACT245DBR, and SN74ACT245PWR) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the main part 74ACT245MTCX.