DM74ALS245AMSA Equivalent & Substitute Parts

Part Overview

The DM74ALS245AMSA is a non-inverting transceiver logic integrated circuit 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-SSOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

DM74ALS245AMSA

onsemiIn Stock: 794DM74ALS245AMSA Datasheet

Current PartRFQ

SN74ALS245ADBR

Texas InstrumentsIn Stock: 3346SN74ALS245ADBR Datasheet

DirectRFQ

SN74ALS245A-1DBR

Texas InstrumentsIn Stock: 1002SN74ALS245A-1DBR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS245AMSA are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 15mA, 24mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 20-SSOP (0.209", 5.30mm Width)
• Mounting Type: Surface Mount

All identified substitute parts maintain identical electrical specifications and physical packaging, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS245ADBR (Texas Instruments) is the primary recommended substitute for the obsolete DM74ALS245AMSA. This part maintains active product status with full electrical and mechanical parameter equivalence. The SN74ALS245ADBR carries RoHS3 compliance certification, supporting modern manufacturing and environmental standards. With 3300 units available in inventory, this option provides supply continuity for production requirements.

SN74ALS245A-1DBR (Texas Instruments) serves as an alternative substitute, also maintaining complete parameter equivalence with active product status and RoHS3 compliance. This variant is designated for prototype applications and carries 969 units in current inventory.

Both Texas Instruments alternatives eliminate obsolescence risk while preserving full functional compatibility with existing circuit designs utilizing the DM74ALS245AMSA.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS245ADBR directly replace DM74ALS245AMSA in existing designs? A: Yes. Both parts share identical electrical specifications (voltage supply, output current, operating temperature) and physical packaging (20-SSOP surface mount). No circuit modifications are required.

Q: What is the difference between SN74ALS245ADBR and SN74ALS245A-1DBR? A: Both parts are electrically and mechanically equivalent. The SN74ALS245A-1DBR is designated for prototype applications. Selection between them depends on production volume and application phase requirements.

Q: Why is the DM74ALS245AMSA classified as obsolete? A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. Substitute parts from active manufacturers ensure long-term design support and supply availability.

Q: Are there any compliance differences between the main part and substitutes? A: The substitute parts (SN74ALS245ADBR and SN74ALS245A-1DBR) carry RoHS3 compliance certification. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status.

Q: Does package compatibility extend to PCB layout? A: Yes. All parts use identical 20-SSOP packaging with 0.209" width and 5.30mm dimensions, ensuring direct footprint compatibility on existing printed circuit boards.