SN74ACT245PWR Equivalent & Substitute Parts

Part Overview

The SN74ACT245PWR is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This surface-mount component operates within the 4.5V to 5.5V supply voltage range and is specified for industrial temperature environments from -40°C to 85°C. The part is currently in active production status with 3,900 units available in inventory.

Substitute parts become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when design requirements permit operation with alternative electrical characteristics such as extended temperature ranges or different output drive capabilities.

Substiute Parts

SN74ACT245PWR

Texas InstrumentsIn Stock: 3994SN74ACT245PWR Datasheet

Current PartRFQ

SN74AHCT245PWR

Texas InstrumentsIn Stock: 5276SN74AHCT245PWR Datasheet

MFR RecommendedRFQ

MC74ACT245DTG

onsemiIn Stock: 1677MC74ACT245DTG Datasheet

MFR RecommendedRFQ

74ACT245MTCX

onsemiIn Stock: 395074ACT245MTCX Datasheet

Parametric EquivalentRFQ

MC74ACT245DTR2G

onsemiIn Stock: 5441MC74ACT245DTR2G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT245PWR is determined by the following critical parameters:

Mandatory Matching Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-TSSOP
• Mounting Type: Surface Mount

Allowable Variation Parameters:

• Current - Output High, Low: May vary within design margin
• Operating Temperature: May extend beyond -40°C ~ 85°C range
• Product Status: Active or Obsolete acceptable if electrical parameters match
• Manufacturer: Alternative qualified manufacturers permitted

Substitute parts are classified into two categories:

MFR Recommended: SN74AHCT245PWR represents a manufacturer-recommended alternative with enhanced specifications (extended temperature range to 125°C, reduced output current to 8mA) while maintaining full electrical compatibility within the 4.5V ~ 5.5V supply range.

Parametric Equivalents: MC74ACT245DTG, 74ACT245MTCX, and MC74ACT245DTR2G maintain identical electrical and thermal specifications to the primary part, differing only in packaging format and manufacturer source.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - SN74ACT245PWR (Texas Instruments): Maintain original specification when supply availability permits. Active production status with 3,900 units in stock ensures continuity. ROHS3 compliance and MSL-1 rating support standard manufacturing processes.

Recommended Alternative - SN74AHCT245PWR (Texas Instruments): Select when extended operating temperature range (-40°C to 125°C) is required or when reduced output drive current (8mA vs. 24mA) is acceptable. Maintains identical package footprint and supply voltage specification. Active production status with 5,200 units available. ROHS3 compliant.

Parametric Equivalents - MC74ACT245DTG, 74ACT245MTCX, MC74ACT245DTR2G (onsemi): These parts provide electrical and thermal equivalence to the primary specification. Selection depends on packaging requirements:

• MC74ACT245DTG: Tube packaging, Obsolete status
• 74ACT245MTCX: Cut Tape & Digi-Reel, Active status, 3,900 units available
• MC74ACT245DTR2G: Tape & Reel, Active status, 5,400 units available

All onsemi alternatives maintain 24mA output drive and -40°C to 85°C temperature range. ROHS3 compliance and MSL-1 rating identical to primary part.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT245PWR replace SN74ACT245PWR in all applications?

A: SN74AHCT245PWR is electrically compatible within the 4.5V to 5.5V supply range. The reduced output current (8mA vs. 24mA) and extended temperature range (-40°C to 125°C) represent enhanced specifications. Verify that load impedance and drive requirements do not exceed 8mA output capability in your specific circuit topology.

Q: What is the difference between the onsemi 74ACT245MTCX and MC74ACT245DTR2G?

A: Both parts are parametric equivalents with identical electrical specifications (24mA output, -40°C to 85°C operating range). The primary difference is packaging format: 74ACT245MTCX is supplied in Cut Tape & Digi-Reel format, while MC74ACT245DTR2G is supplied in Tape & Reel format. Select based on assembly equipment compatibility and procurement volume requirements.

Q: Why is MC74ACT245DTG listed as Obsolete?

A: MC74ACT245DTG maintains full electrical equivalence to SN74ACT245PWR but is no longer in active production by onsemi. Existing inventory (1,661 units) may be available through distribution channels. For new designs, select from Active status alternatives: 74ACT245MTCX or MC74ACT245DTR2G.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SN74AHCT245PWR, MC74ACT245DTG, 74ACT245MTCX, MC74ACT245DTR2G) are ROHS3 compliant with MSL-1 moisture sensitivity rating, matching the primary SN74ACT245PWR specification.

Q: Can I use these parts interchangeably on the same PCB assembly?

A: Yes, provided the 20-TSSOP package footprint is identical. All listed parts use the same 20-TSSOP (0.173", 4.40mm Width) package. Verify that your circuit design accommodates the electrical parameter variations (output current and temperature range) of the selected substitute before assembly.