74ABT2541CMSA Equivalent & Substitute Parts

Part Overview

The 74ABT2541CMSA is a non-inverting buffer logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. Housed in a 20-SSOP package, this component operates across a 4.5V to 5.5V supply voltage range and supports output currents of 32mA (high) and 15mA (low). The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74ABT2541CMSA

onsemiIn Stock: 102774ABT2541CMSA Datasheet

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SN74ABT541BDBR

Texas InstrumentsIn Stock: 3403SN74ABT541BDBR Datasheet

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SN74ABT241ADBR

Texas InstrumentsIn Stock: 2862SN74ABT241ADBR Datasheet

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SN74ABT541BIPWREP

Texas InstrumentsIn Stock: 1191SN74ABT541BIPWREP Datasheet

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SN74ABT541BIPWRQ1

Texas InstrumentsIn Stock: 3730SN74ABT541BIPWRQ1 Datasheet

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SN74ABT541BPW

Texas InstrumentsIn Stock: 3428SN74ABT541BPW Datasheet

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SN74ABT541BPWR

Texas InstrumentsIn Stock: 101910SN74ABT541BPWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ABT2541CMSA is determined by the following critical parameters: logic type (buffer, non-inverting), number of elements, bits per element, output type (3-state), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and package compatibility.

Substitute parts are grouped into two categories:

Direct Substitutes (Identical Configuration): Parts maintaining 1 element with 8 bits per element in the same or compatible package footprint. The SN74ABT541BDBR (20-SSOP) provides pin-for-pin compatibility with the original part. Additional variants such as SN74ABT541BIPWREP, SN74ABT541BIPWRQ1, SN74ABT541BPW, and SN74ABT541BPWR use the 20-TSSOP package, which differs in physical dimensions (0.173" vs 0.209" width) but maintains electrical equivalence and functional compatibility.

Similar Substitutes (Modified Configuration): The SN74ABT241ADBR maintains the same package footprint and electrical parameters but differs in element configuration (2 elements with 4 bits per element instead of 1 element with 8 bits). This part is functionally compatible for applications where the buffer configuration can be adapted to the circuit design.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement: Select SN74ABT541BDBR when PCB layout requires the original 20-SSOP package footprint. This part maintains identical pinout and package dimensions while offering active product status and ROHS3 compliance.

For Package-Flexible Applications: The SN74ABT541BPWR, SN74ABT541BIPWREP, SN74ABT541BIPWRQ1, and SN74ABT541BPW variants provide functionally equivalent 1-element, 8-bit buffer configurations in the 20-TSSOP package. These parts are suitable for new designs or redesigns where the smaller package footprint (0.173" width) is acceptable. SN74ABT541BIPWRQ1 includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

For Modified Configuration Applications: The SN74ABT241ADBR offers a 2-element, 4-bit buffer configuration in the original 20-SSOP package. This part is applicable only when circuit design can accommodate the different element and bit configuration while maintaining the same package footprint.

All substitute parts are manufactured by Texas Instruments with active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment compared to the obsolete onsemi original.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT541BDBR directly replace 74ABT2541CMSA without PCB modification?

A: Yes. The SN74ABT541BDBR maintains identical pinout, package footprint (20-SSOP, 0.209" width), and electrical specifications (4.5V ~ 5.5V supply, -40°C ~ 85°C operating range, 3-state output). No PCB layout changes are required.

Q: What is the difference between 20-SSOP and 20-TSSOP packages?

A: Both packages contain 20 pins with identical pinout. The primary difference is package width: 20-SSOP measures 0.209" (5.30mm) while 20-TSSOP measures 0.173" (4.40mm). The 20-TSSOP is a more compact variant. PCB footprints are not interchangeable; package selection depends on available board space and design requirements.

Q: Why do substitute parts show higher output low current (64mA vs 15mA)?

A: The Texas Instruments 74ABT541 series specifies 64mA output low current, which exceeds the original onsemi specification of 15mA. This represents improved performance capability and does not prevent substitution. Circuits designed for the original 15mA specification will operate correctly with the higher-capability substitute.

Q: Is SN74ABT241ADBR a suitable substitute for the 74ABT2541CMSA?

A: The SN74ABT241ADBR is functionally compatible but differs in configuration: it provides 2 elements with 4 bits per element instead of 1 element with 8 bits. Substitution is possible only if circuit design can accommodate this modified buffer configuration. The package footprint (20-SSOP) remains identical.

Q: Which substitute part offers automotive qualification?

A: The SN74ABT541BIPWRQ1 includes AEC-Q100 automotive qualification and is suitable for automotive-grade applications. This part uses the 20-TSSOP package and is available in cut tape packaging.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitute parts listed (SN74ABT541BDBR, SN74ABT241ADBR, SN74ABT541BIPWREP, SN74ABT541BIPWRQ1, SN74ABT541BPW, SN74ABT541BPWR) are ROHS3 compliant. The original onsemi part does not specify RoHS status.