74ACT245SJX Equivalent & Substitute Parts

Part Overview

The 74ACT245SJX is a non-inverting transceiver logic IC manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

74ACT245SJX

onsemiIn Stock: 115774ACT245SJX Datasheet

Current PartRFQ

74ACT245MTCX

onsemiIn Stock: 395074ACT245MTCX Datasheet

SimilarRFQ

74ACT245SCX

onsemiIn Stock: 365574ACT245SCX Datasheet

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SN74ACT245NS

Texas InstrumentsIn Stock: 768SN74ACT245NS Datasheet

DirectRFQ

CD74ACT245M96

Texas InstrumentsIn Stock: 15191CD74ACT245M96 Datasheet

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SN74ACT245DW

Texas InstrumentsIn Stock: 6197SN74ACT245DW Datasheet

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SN74ACT245DWR

Texas InstrumentsIn Stock: 4903SN74ACT245DWR Datasheet

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SN74ACT245PWR

Texas InstrumentsIn Stock: 3994SN74ACT245PWR Datasheet

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SN74ACT245NSR

Texas InstrumentsIn Stock: 2785SN74ACT245NSR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ACT245SJX is determined by strict adherence to the following electrical and mechanical parameters:

Core Electrical Parameters (Must Match):

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C (TA)
• Series: 74ACT
• Base Product Number: 74ACT245

Package Compatibility Categories:

• Direct Package Match: 20-SOIC (0.209", 5.30mm Width)
• Alternative Package: 20-TSSOP (0.173", 4.40mm Width)
• Alternative Package: 20-SO (0.209", 5.30mm Width)

Substitute parts are grouped by package type. Parts within the same package category are electrically interchangeable. Parts in different package categories require PCB layout modification but maintain full electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Package Replacement (20-SOIC 0.209" Width): SN74ACT245NSR is the primary active substitute for 74ACT245SJX. Both parts share identical package dimensions and electrical specifications. SN74ACT245NSR is manufactured by Texas Instruments and carries active product status with ROHS3 compliance, providing long-term availability and supply chain stability.

Alternative Package Options:

For designs permitting PCB layout modification, 74ACT245MTCX and SN74ACT245PWR offer 20-TSSOP packaging with reduced footprint (0.173" width). Both maintain full electrical compatibility and active product status.

For 20-SOIC 0.295" width packaging, SN74ACT245DWR and 74ACT245SCX provide active alternatives. CD74ACT245M96 offers extended operating temperature range (-55°C to 125°C) within the same 20-SOIC 0.295" package, suitable for applications requiring broader temperature performance.

Compliance Considerations: All active substitute parts carry ROHS3 compliance certification. Parts with discontinued status (SN74ACT245NS, SN74ACT245DW) remain electrically valid but offer limited future availability.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ACT245NSR as a direct replacement for 74ACT245SJX? A: Yes. Both parts share identical electrical specifications (24mA output current, 4.5V-5.5V supply, -40°C to 85°C operating range) and package dimensions (20-SOIC 0.209" width). No circuit modification is required.

Q: What is the difference between 20-SOIC (0.209") and 20-SOIC (0.295") packages? A: These are different package widths. The 0.209" variant is narrower and matches the original 74ACT245SJX footprint. The 0.295" variant is wider and requires PCB layout modification. Electrical performance is identical.

Q: Is CD74ACT245M96 compatible with my design? A: CD74ACT245M96 is electrically compatible but operates across a wider temperature range (-55°C to 125°C versus -40°C to 85°C). It uses 20-SOIC 0.295" packaging, requiring PCB modification. Use this part only if your application requires extended temperature performance.

Q: Why is 74ACT245SJX marked as obsolete? A: Obsolete status indicates the manufacturer has discontinued production. Active substitutes ensure design continuity and production support.

Q: Can I substitute a 20-TSSOP package part into a 20-SOIC footprint? A: No. Package footprints are not interchangeable. 20-TSSOP (0.173" width) and 20-SOIC (0.209" or 0.295" width) require different PCB layouts and cannot be used interchangeably without redesign.

Q: Are all substitute parts ROHS3 compliant? A: All active substitute parts carry ROHS3 compliance. Discontinued parts (SN74ACT245NS, SN74ACT245DW) also carry ROHS3 certification but offer limited availability.