SN74ALS245ADB Equivalent & Substitute Parts

Part Overview

The SN74ALS245ADB is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, designed for 8-bit bidirectional data transfer applications. This device features 1 element with 8 bits per element, 3-state output capability, and operates within a 4.5V to 5.5V supply voltage range. The part is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

SN74ALS245ADB

Texas InstrumentsIn Stock: 2595SN74ALS245ADB Datasheet

Current PartRFQ

SN74ALS245ADBR

Texas InstrumentsIn Stock: 3346SN74ALS245ADBR Datasheet

MFR RecommendedRFQ

SN74ALS245A-1DBR

Texas InstrumentsIn Stock: 1002SN74ALS245A-1DBR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ALS245ADB are determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State

Electrical Parameters:

• Current - Output High: 15mA
• Current - Output Low: 24mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)

Physical Parameters:

• Package / Case: 20-SSOP (0.209", 5.30mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must match all parameters listed above. Parts are grouped based on product status and availability to support component selection strategies.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS245ADBR (MFR Recommended Substitute)

The SN74ALS245ADBR is the manufacturer-recommended substitute for the SN74ALS245ADB. This part maintains identical electrical and mechanical specifications while offering Active product status, ensuring long-term availability and supply chain stability. The SN74ALS245ADBR carries ROHS3 compliance and REACH Unaffected status, supporting regulatory requirements for new designs and production continuity. With 3300 units in stock, this part provides superior availability compared to the main part number.

SN74ALS245A-1DBR (Parametric Equivalent)

The SN74ALS245A-1DBR is a parametric equivalent offering identical functional and electrical performance. This part is classified as Active status, supporting ongoing production requirements. All electrical parameters, package specifications, and compliance certifications match the main part. With 969 units in stock, this part serves as an alternative when primary substitute availability is constrained.

Selection Strategy

For new designs or production requiring component continuity, select SN74ALS245ADBR as the primary choice due to manufacturer recommendation and superior inventory levels. The SN74ALS245A-1DBR serves as a secondary option when primary substitute availability is limited. Both substitutes are electrically and mechanically interchangeable with the SN74ALS245ADB within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS245ADBR be used as a direct replacement for SN74ALS245ADB?

A: Yes. The SN74ALS245ADBR is electrically and mechanically equivalent to the SN74ALS245ADB. Both parts share identical logic type, bit configuration, output characteristics, supply voltage range, operating temperature, package type, and compliance certifications. No circuit modifications are required for substitution.

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

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary difference is product status: SN74ALS245ADBR is manufacturer-recommended with higher inventory availability (3300 units), while SN74ALS245A-1DBR is a parametric equivalent with lower inventory (969 units). Both are Active status parts suitable for production use.

Q: Why is the SN74ALS245ADB classified as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this specific part number. Customers requiring this component should transition to the recommended substitute SN74ALS245ADBR to ensure continued supply chain access and support.

Q: Are there any package or pinout differences between these parts?

A: No. All three parts use the identical 20-SSOP package with 0.209" width (5.30mm). Pinout and physical dimensions are identical, enabling direct PCB-level substitution without layout modifications.

Q: Do these parts meet RoHS and environmental compliance requirements?

A: Yes. All three parts are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). The SN74ALS245ADBR additionally carries REACH Unaffected status, supporting comprehensive regulatory compliance for global applications.

Q: What are the output current specifications for these transceiver parts?

A: All three parts deliver 15mA output current in the high state and 24mA output current in the low state, supporting standard TTL/CMOS logic interface requirements within the 4.5V to 5.5V supply voltage range.

Q: Can these parts operate at temperatures outside the 0°C to 70°C range?

A: No. All three parts are specified for operation within the 0°C to 70°C (TA) temperature range. Applications requiring extended temperature operation require alternative part selection outside this product family.