74ACT245SJ Equivalent & Substitute Parts

Part Overview

The 74ACT245SJ is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SOP package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design requirements and production continuity.

Substiute Parts

74ACT245SJ

onsemiIn Stock: 625474ACT245SJ Datasheet

Current PartRFQ

74ACT245SC

onsemiIn Stock: 119074ACT245SC Datasheet

SimilarRFQ

CD74ACT245M96

Texas InstrumentsIn Stock: 15191CD74ACT245M96 Datasheet

SimilarRFQ

SN74ACT245DW

Texas InstrumentsIn Stock: 6197SN74ACT245DW Datasheet

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SN74ACT245DWR

Texas InstrumentsIn Stock: 4903SN74ACT245DWR Datasheet

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SN74ACT245NSR

Texas InstrumentsIn Stock: 2785SN74ACT245NSR Datasheet

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SN74ACT245NS

Texas InstrumentsIn Stock: 768SN74ACT245NS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ACT245SJ is determined by strict equivalence across the following critical parameters:

• 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
• Mounting Type: Surface Mount
• Base Product Number: 74ACT245

Substitute parts are grouped into two categories based on package compatibility:

Group 1 - 20-SOP Package (Direct Footprint Match): SN74ACT245NSR maintains identical package dimensions (0.209", 5.30mm Width) and all electrical parameters.

Group 2 - 20-SOIC Package (Alternate Footprint): 74ACT245SC, CD74ACT245M96, SN74ACT245DW, and SN74ACT245DWR feature a larger package footprint (0.295", 7.50mm Width) but maintain all core electrical specifications. SN74ACT245NS is also included in this group.

Parameter Comparison

Engineering Selection Recommendations

For Direct Footprint Replacement (20-SOP, 5.30mm Width): SN74ACT245NSR is the primary active substitute, manufactured by Texas Instruments with ROHS3 compliance and MSL 1 rating. This part maintains identical package dimensions and all electrical parameters to the 74ACT245SJ. SN74ACT245NS provides parametric equivalence but is discontinued at DiGi Electronics.

For PCB Redesign Scenarios (20-SOIC, 7.50mm Width): SN74ACT245DWR is the recommended active substitute from Texas Instruments, offering ROHS3 compliance, MSL 1 rating, and continuous availability. CD74ACT245M96 from Texas Instruments provides extended operating temperature range (-55°C ~ 125°C) with ROHS3 compliance and MSL 1 rating, suitable for applications requiring broader thermal performance. 74ACT245SC from onsemi is an active alternative with ROHS3 compliance but features MSL 3 rating (168 Hours).

All substitute parts maintain identical electrical specifications: 24mA output current (high and low), 4.5V to 5.5V supply voltage, and 3-state output configuration.

Frequently Asked Questions (FAQ)

Q: Can I use a 20-SOIC package part as a direct replacement for the 20-SOP package 74ACT245SJ? A: No. The 20-SOIC package (0.295", 7.50mm Width) has different footprint dimensions than the 20-SOP package (0.209", 5.30mm Width). PCB layout modification is required. For direct footprint compatibility, use SN74ACT245NSR.

Q: What is the difference between MSL 1 and MSL 3 ratings? A: MSL 1 indicates unlimited moisture sensitivity level with no floor life restrictions. MSL 3 specifies a 168-hour floor life requirement after moisture exposure. For applications with extended storage or high-humidity environments, MSL 1 parts are preferred.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory standards.

Q: Does CD74ACT245M96 provide better performance than other substitutes? A: CD74ACT245M96 extends the operating temperature range to -55°C ~ 125°C compared to the standard -40°C ~ 85°C range of other substitutes. This wider temperature specification is beneficial for industrial or automotive applications requiring enhanced thermal performance.

Q: Which substitute offers the best long-term availability? A: SN74ACT245DWR and CD74ACT245M96 from Texas Instruments are listed as active products, indicating ongoing production and supply. 74ACT245SC from onsemi is also active. Parts marked as discontinued at DiGi Electronics may have limited future availability.