DM74ALS245AMSAX Equivalent & Substitute Parts

Part Overview

The DM74ALS245AMSAX 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 the 4.5V to 5.5V supply voltage range and is housed in a 20-SSOP surface mount package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

DM74ALS245AMSAX

onsemiIn Stock: 910DM74ALS245AMSAX Datasheet

Current PartRFQ

SN74ALS245A-1DBR

Texas InstrumentsIn Stock: 1002SN74ALS245A-1DBR Datasheet

SimilarRFQ

SN74ALS245ADBR

Texas InstrumentsIn Stock: 3346SN74ALS245ADBR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS245AMSAX are identified based on strict parametric equivalence across the following critical criteria:

Electrical Parameters:

• Logic type: Transceiver, Non-Inverting
• Number of elements: 1
• Bits per element: 8
• Output configuration: 3-State
• Output current specifications: 15mA (high), 24mA (low)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: 0°C ~ 70°C

Mechanical Parameters:

• Package type: 20-SSOP
• Package dimensions: 0.209" width, 5.30mm width
• Mounting type: Surface Mount

Series Compatibility:

• Base series: 74ALS

Parts meeting all these parameters are classified as parametric equivalents and can be directly substituted in applications requiring the DM74ALS245AMSAX.

Parameter Comparison

Engineering Selection Recommendations

Both Texas Instruments alternatives—SN74ALS245A-1DBR and SN74ALS245ADBR—are parametrically equivalent to the DM74ALS245AMSAX and meet all electrical and mechanical substitution criteria. The primary distinction between these options is product status:

SN74ALS245ADBR is the preferred selection for new designs and ongoing production. This part maintains active product status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. Inventory availability is substantial at 3300 units.

SN74ALS245A-1DBR is classified as a prototype variant and remains active. While electrically equivalent, this designation indicates limited production scope. Inventory availability is 969 units.

Both parts carry identical electrical specifications, package configuration, and thermal operating range as the obsolete onsemi original. Direct pin-for-pin substitution is supported without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS245ADBR be used as a direct replacement for DM74ALS245AMSAX?

A: Yes. Both parts are parametrically equivalent across all critical electrical and mechanical parameters: 8-bit non-inverting transceiver, 3-state output, 15mA/24mA output current, 4.5V–5.5V supply voltage, 0°C–70°C operating temperature, and 20-SSOP surface mount package. No circuit modifications are required.

Q: What is the difference between SN74ALS245A-1DBR and SN74ALS245ADBR?

A: Both parts are electrically identical and meet the same parametric specifications. The primary difference is product designation: SN74ALS245A-1DBR is classified as a prototype variant, while SN74ALS245ADBR is a standard production part with active status. For new designs, SN74ALS245ADBR is recommended due to its established production status and higher inventory availability.

Q: Are there any compliance or certification differences between the substitute parts?

A: SN74ALS245ADBR carries ROHS3 compliance certification. Both Texas Instruments parts maintain MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original onsemi component.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All three parts share identical 20-SSOP package dimensions (0.209" width, 5.30mm width) and surface mount configuration. PCB footprints and assembly processes require no modification.

Q: What inventory considerations should guide part selection?

A: SN74ALS245ADBR offers the highest inventory availability at 3300 units, supporting both immediate requirements and long-term production needs. SN74ALS245A-1DBR maintains 969 units in stock.