MM74HC245ASJX Equivalent & Substitute Parts

Part Overview

The MM74HC245ASJX 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 across a 2V to 6V supply voltage range and is housed in a 20-SOP package. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

MM74HC245ASJX

onsemiIn Stock: 2753MM74HC245ASJX Datasheet

Current PartRFQ

SN74HC245NSR

Texas InstrumentsIn Stock: 35377SN74HC245NSR Datasheet

DirectRFQ

CD74HC245M96

Texas InstrumentsIn Stock: 6433CD74HC245M96 Datasheet

SimilarRFQ

SN74HC245DBR

Texas InstrumentsIn Stock: 5227SN74HC245DBR Datasheet

SimilarRFQ

SN74HC245DW

Texas InstrumentsIn Stock: 5943SN74HC245DW Datasheet

SimilarRFQ

SN74HC245DWR

Texas InstrumentsIn Stock: 131463SN74HC245DWR Datasheet

SimilarRFQ

SN74HC245NS

Texas InstrumentsIn Stock: 3365SN74HC245NS Datasheet

SimilarRFQ

SN74HC623NSR

Texas InstrumentsIn Stock: 1124SN74HC623NSR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MM74HC245ASJX are categorized based on the following substitution criteria:

Direct Manufacturer Substitutes maintain identical electrical specifications (7.8mA output current, 2V–6V supply, -40°C to 85°C operating range) and the same 74HC245 base product number. These parts differ only in packaging format or supplier configuration and are fully interchangeable at the functional level.

Similar Manufacturer Substitutes share the core 74HC245 base product number and transceiver architecture but may vary in package dimensions, output current characteristics, or operating temperature range. The CD74HC245M96 variant operates across an extended temperature range (-55°C to 125°C) with reduced output current (5.2mA), while maintaining supply voltage and logic function compatibility.

Parametric Equivalent Substitutes belong to the 74HC series transceiver family but use a different base product number (74HC623). These parts maintain identical electrical performance parameters and package compatibility but represent a different device variant within the same logic family.

Key parameters determining substitution eligibility:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Voltage - Supply: 2V ~ 6V
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

SN74HC245NSR (Texas Instruments) is the primary direct substitute, offering active product status with identical electrical specifications and the same 20-SOIC narrow-body package (0.209" width). This part provides the highest compatibility for direct replacement in existing designs.

SN74HC245DWR (Texas Instruments) maintains full electrical equivalence and active status but uses a wider 20-SOIC package (0.295" width). PCB layout modifications are required for this variant.

CD74HC245M96 (Texas Instruments) is suitable for applications requiring extended operating temperature range (-55°C to 125°C). The reduced output current specification (5.2mA versus 7.8mA) must be evaluated against circuit load requirements. The wider package format (0.295" width) necessitates layout changes.

SN74HC623NSR (Texas Instruments) provides parametric equivalence within the 74HC transceiver family with active product status. This variant maintains identical electrical performance and narrow-body package compatibility.

SN74HC245NS and SN74HC245DBR are available but carry discontinued or limited availability status, making them secondary options for new designs.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74HC245NSR directly replace MM74HC245ASJX without PCB modifications?

A: Yes. SN74HC245NSR maintains identical electrical specifications (7.8mA output current, 2V–6V supply, -40°C to 85°C operating range) and uses the same 20-SOIC narrow-body package (0.209" width). No PCB layout changes are required.

Q: What is the difference between the narrow-body (0.209") and wide-body (0.295") 20-SOIC packages?

A: Package width affects PCB footprint spacing. Narrow-body packages (SN74HC245NSR, SN74HC245NS) require less board space, while wide-body packages (CD74HC245M96, SN74HC245DWR) have increased pin-to-pin distances. Substituting between these formats requires PCB redesign.

Q: Is CD74HC245M96 suitable for all applications using MM74HC245ASJX?

A: CD74HC245M96 is functionally compatible but has two differences: extended operating temperature range (-55°C to 125°C versus -40°C to 85°C) and reduced output current (5.2mA versus 7.8mA). Verify that circuit load requirements do not exceed 5.2mA per output before substitution. The wider package format also requires PCB layout changes.

Q: Why is MM74HC245ASJX listed as obsolete?

A: onsemi has discontinued this part number. Active alternatives from Texas Instruments (SN74HC245NSR, SN74HC245DWR, CD74HC245M96) provide equivalent or superior functionality with ongoing manufacturing support.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 rating, meeting current environmental and manufacturing standards.

Q: What is the difference between SN74HC245NSR and SN74HC623NSR?

A: Both parts maintain identical electrical specifications and package compatibility. SN74HC623NSR uses a different base product number (74HC623 versus 74HC245) but provides equivalent transceiver functionality. Selection between these variants depends on design documentation requirements and supplier availability.