DM74AS245N Equivalent & Substitute Parts

Part Overview

The DM74AS245N is a non-inverting transceiver logic integrated circuit manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-pin DIP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance, repair, and legacy design support.

Substiute Parts

DM74AS245N

onsemiIn Stock: 1148DM74AS245N Datasheet

Current PartRFQ

SN74AS245N

Texas InstrumentsIn Stock: 2291SN74AS245N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74AS245N is determined by strict equivalence across the following critical parameters:

• Logic Function: Transceiver, Non-Inverting configuration with 1 element and 8 bits per element
• Output Architecture: 3-State output capability
• Electrical Specifications: Supply voltage range 4.5V to 5.5V; operating temperature 0°C to 70°C
• Physical Form Factor: 20-pin DIP package with 0.300" (7.62mm) pitch
• Mounting Technology: Through-hole installation

The SN74AS245N from Texas Instruments meets all substitution criteria. Both parts share identical logic topology, pin configuration, and functional behavior within specified operating conditions. The primary distinction lies in product status and compliance certifications rather than electrical or mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS245N is a direct functional equivalent to the DM74AS245N. Both components implement identical 74AS series transceiver logic with matching pin assignments, electrical performance within specified ranges, and physical packaging.

The SN74AS245N offers the advantage of active product status from Texas Instruments, ensuring continued availability and manufacturing support. The component carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and system updates.

The output low current specification of the SN74AS245N (64mA versus 48mA) represents a minor performance enhancement that does not affect functional compatibility in standard applications operating within the 4.5V to 5.5V supply range.

Both parts maintain REACH Unaffected status and share identical ECCN and HTSUS classifications, confirming regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can the SN74AS245N directly replace the DM74AS245N in existing circuits?

A: Yes. Both components share identical pin configuration, logic function, and electrical specifications within the 4.5V to 5.5V operating range. Direct socket substitution is supported without circuit modification.

Q: What is the significance of the product status difference?

A: The DM74AS245N is classified as obsolete, indicating onsemi has discontinued manufacturing. The SN74AS245N maintains active status from Texas Instruments, ensuring long-term availability and supply chain reliability.

Q: Are there compliance differences between the two parts?

A: The SN74AS245N carries ROHS3 compliance certification. Both parts maintain REACH Unaffected status and identical trade classification codes, confirming regulatory equivalence for procurement and deployment.

Q: Does the output current difference affect circuit operation?

A: The SN74AS245N output low current specification (64mA) exceeds the DM74AS245N specification (48mA). This represents improved performance capability and does not create compatibility issues in applications designed for the original 48mA specification.

Q: Are packaging and mounting specifications identical?

A: Yes. Both components use 20-pin DIP packaging with 0.300" (7.62mm) pitch and through-hole mounting technology, ensuring mechanical and electrical compatibility in PCB designs.