SN74ALS541DB Equivalent & Substitute Parts

Part Overview

The SN74ALS541DB is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments, designed for 8-bit data buffering applications with 3-state output capability. This device operates within the 74ALS logic family and is housed in a 20-SSOP surface mount package.

The SN74ALS541DB carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production and sales of this specific part number. This status necessitates identification of equivalent substitute components to maintain design continuity and ensure ongoing component availability for production and maintenance applications.

Substiute Parts

SN74ALS541DB

Texas InstrumentsIn Stock: 1139SN74ALS541DB Datasheet

Current PartRFQ

SN74ALS541DBR

Texas InstrumentsIn Stock: 3916SN74ALS541DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74ALS541DB is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Logic type: Buffer, Non-Inverting
• Number of elements: 1
• Number of bits per element: 8
• Output configuration: 3-State

Electrical Parameters:

• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: 0°C ~ 70°C (TA)
• Output current specifications (High and Low)

Physical Parameters:

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

Compliance Parameters:

• RoHS3 Compliance
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part SN74ALS541DBR maintains identical functional, electrical, and physical specifications while offering Active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS541DBR is the direct substitute for the SN74ALS541DB based on the following engineering criteria:

Product Status Consideration: The SN74ALS541DB is designated Last Time Buy, indicating end-of-life status. The SN74ALS541DBR maintains Active product status, ensuring continued availability and manufacturing support from Texas Instruments.

Electrical Equivalence: Both parts operate within identical supply voltage ranges (4.5V ~ 5.5V) and temperature specifications (0°C ~ 70°C TA). The output current specifications are compatible, with the substitute part delivering 24mA output low current compared to 48mA in the original part. This represents a conservative specification that maintains functional compatibility in standard buffering applications.

Compliance and Certification: Both parts maintain ROHS3 compliance and identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited), ensuring equivalent environmental and regulatory compliance for manufacturing and deployment.

Physical Compatibility: Identical 20-SSOP package specifications ensure direct pin-for-pin compatibility and PCB layout equivalence without design modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS541DBR be used as a direct replacement for the SN74ALS541DB?

A: Yes. The SN74ALS541DBR is functionally and electrically equivalent to the SN74ALS541DB. Both devices feature identical logic configuration (1 element, 8-bit non-inverting buffer with 3-state output), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C TA), and package specifications (20-SSOP). No circuit modifications are required for substitution.

Q: What is the difference in output current specifications between these parts?

A: The SN74ALS541DB specifies 48mA output low current, while the SN74ALS541DBR specifies 24mA output low current. The substitute part's lower output current specification is conservative and maintains compatibility with standard logic-level buffering applications. Applications requiring the full 48mA output current must be evaluated against the substitute part's specifications.

Q: Why is the SN74ALS541DB marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this part number. The SN74ALS541DBR, carrying Active status, represents the current production equivalent and is recommended for new designs and ongoing component procurement.

Q: Are there packaging differences between the two parts?

A: The SN74ALS541DB packaging option is not specified in available documentation. The SN74ALS541DBR is available in Cut Tape (CT) and Digi-Reel® packaging options. Both parts use identical 20-SSOP package specifications for component placement and soldering.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74ALS541DB and SN74ALS541DBR are ROHS3 compliant and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited), ensuring equivalent environmental and regulatory compliance.