74F541SC Equivalent & Substitute Parts

Part Overview

The 74F541SC is a non-inverting buffer logic integrated circuit manufactured by onsemi, designed for 8-bit buffering applications with 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	74F541SC
Logic Type	Buffer, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	20-SOIC
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 74F541SC are classified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: 0°C ~ 70°C (TA)
Base Product Number: 74F541

Direct Substitutes maintain identical electrical specifications and package dimensions (20-SOIC with 0.295" width), differing only in manufacturer and product status.

Similar Substitutes share all electrical parameters but utilize a different package variant (20-SO with 0.209" width), requiring PCB layout verification before implementation.

Parameter Comparison

Parameter	74F541SC (onsemi)	SN74F541DW (TI)	SN74F541DWR (TI)	SN74F541NSR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	3mA, 64mA	15mA, 64mA	15mA, 64mA	15mA, 64mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.209", 5.30mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74F541DWR (Texas Instruments) is the primary recommended substitute. This part maintains full electrical compatibility with the 74F541SC, operates within identical voltage and temperature ranges, and is currently in active production status. The SN74F541DWR is supplied in Tape & Reel packaging and carries ROHS3 compliance certification, supporting modern manufacturing and environmental standards.

SN74F541DW (Texas Instruments) provides equivalent electrical functionality and identical package dimensions. This part is classified as Last Time Buy, indicating limited future availability. Selection of this variant should be reserved for applications where Tape & Reel packaging is not required.

SN74F541NSR (Texas Instruments) offers full electrical compatibility but utilizes a narrower 20-SO package variant (0.209" width versus 0.295" width). This part is actively produced and ROHS3 compliant. PCB layout modification is required for implementation, as the reduced package width affects footprint dimensions and pin spacing.

All three Texas Instruments alternatives are REACH compliant and carry identical ECCN and HTSUS classifications as the original component.

Frequently Asked Questions (FAQ)

Q: Can SN74F541DWR directly replace 74F541SC without PCB modification?

A: Yes. The SN74F541DWR maintains identical pin configuration, package dimensions (20-SOIC, 0.295" width), and electrical specifications. No PCB layout changes are required.

Q: What is the difference between SN74F541DW and SN74F541DWR?

A: Both parts are electrically identical and use the same package footprint. The primary difference is packaging format: SN74F541DW is supplied in Tube packaging, while SN74F541DWR is supplied in Tape & Reel format. SN74F541DWR is recommended for production environments.

Q: Can SN74F541NSR be used as a substitute?

A: SN74F541NSR is electrically compatible but uses a different package variant (20-SO with 0.209" width instead of 0.295" width). PCB footprint modification is required. This part is suitable only if layout changes are feasible.

Q: What is the significance of the output current difference (3mA vs 15mA)?

A: The 74F541SC specifies 3mA output high current, while all Texas Instruments substitutes specify 15mA. This represents higher drive capability in the substitute parts. Applications designed for the original 3mA specification will operate correctly with the higher-current alternatives, as they provide enhanced output drive strength.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three Texas Instruments alternatives (SN74F541DW, SN74F541DWR, and SN74F541NSR) carry ROHS3 compliance certification. The original 74F541SC RoHS status is not specified in available documentation.

Q: What is the product status significance?

A: The 74F541SC is obsolete, meaning onsemi no longer manufactures this part. SN74F541DWR is actively produced, ensuring long-term availability. SN74F541DW is Last Time Buy, indicating limited remaining stock before discontinuation.

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