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LM809M3-4.63 Equivalent & Substitute Parts
Part Overview
The LM809M3-4.63 is a single-channel power supply supervisor IC manufactured by Texas Instruments, designed for power-on reset and simple reset applications. This component monitors a 4.63V threshold voltage and provides push-pull, totem pole output with active-low reset functionality. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain identical electrical characteristics and mechanical compatibility while meeting current product availability and compliance standards.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage Threshold | 4.63V |
| Output Type | Push-Pull, Totem Pole |
| Reset Logic | Active Low |
| Reset Timeout | 140ms Minimum |
| Number of Channels | 1 |
| Package Type | TO-236-3, SC-59, SOT-23-3 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C to 105°C (TA) |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the LM809M3-4.63 are qualified based on the following critical parameters:
- Voltage threshold of 4.63V
- Single-channel monitoring configuration
- Push-pull, totem pole output topology
- Active-low reset logic
- 140ms minimum reset timeout
- SOT-23-3 package compatibility
- Surface mount configuration
Substitutes are grouped into three categories:
Direct Manufacturer Equivalents (Texas Instruments): Parts with identical specifications and active product status, differing only in packaging format (Cut Tape & Digi-Reel vs. Tape & Reel).
Manufacturer-Recommended Alternatives (Analog Devices Inc., Diodes Incorporated, Microchip Technology): Parts meeting all electrical and mechanical parameters with extended operating temperature ranges and active product status.
Parametric Equivalents: Parts with identical functional parameters but different manufacturer sourcing, suitable for applications where manufacturer flexibility is acceptable.
Parameter Comparison
| Part Number | Manufacturer | Voltage Threshold | Output Type | Reset Logic | Reset Timeout | Operating Temp (TA) | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| LM809M3-4.63 | Texas Instruments | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 105°C | SOT-23-3 | Obsolete | Non-compliant |
| LM809M3-4.63/NOPB | Texas Instruments | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 105°C | SOT-23-3 | Active | ROHS3 Compliant |
| LM809M3X-4.63/NOPB | Texas Instruments | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 105°C | SOT-23-3 | Active | ROHS3 Compliant |
| ADM809LARTZ-REEL | Analog Devices Inc. | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 125°C | SOT-23-3 | Active | ROHS3 Compliant |
| ADM809LARTZ-REEL7 | Analog Devices Inc. | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 125°C | SOT-23-3 | Active | ROHS3 Compliant |
| APX809S-46SA-7 | Diodes Incorporated | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 125°C | SOT-23-3 | Active | ROHS3 Compliant |
| TCM809LVNB713 | Microchip Technology | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 125°C | SOT-23-3 | Active | ROHS3 Compliant |
| MAX809LEUR+T | Analog Devices Inc./Maxim Integrated | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 105°C | SOT-23-3 | Active | ROHS3 Compliant |
| MAX809LEUR+T10 | Analog Devices Inc./Maxim Integrated | 4.63V | Push-Pull, Totem Pole | Active Low | 140ms Min | -40°C to 105°C | SOT-23-3 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Texas Instruments): LM809M3-4.63/NOPB and LM809M3X-4.63/NOPB are direct equivalents from the original manufacturer. Both are active products with ROHS3 compliance, differing only in packaging format. These are the preferred choices for designs requiring continuity with the original specification.
Extended Temperature Range Alternatives: ADM809LARTZ-REEL, ADM809LARTZ-REEL7, APX809S-46SA-7, and TCM809LVNB713 provide identical electrical functionality with extended operating temperature ranges (-40°C to 125°C). These parts are suitable for applications requiring enhanced thermal performance while maintaining all critical electrical parameters.
Parametric Equivalents: MAX809LEUR+T and MAX809LEUR+T10 meet all functional requirements with active product status and ROHS3 compliance. These parts maintain the original -40°C to 105°C operating range and are available in high inventory quantities.
All substitute parts maintain identical voltage threshold, output topology, reset logic, reset timeout, and package compatibility. Selection should be based on product availability, packaging requirements, and thermal operating conditions specific to the application.
Frequently Asked Questions (FAQ)
Q: Can I substitute LM809M3-4.63 with LM809M3-4.63/NOPB? A: Yes. Both parts are Texas Instruments products with identical electrical specifications and SOT-23-3 packaging. The primary difference is product status (obsolete vs. active) and RoHS compliance. LM809M3-4.63/NOPB is the recommended direct replacement.
Q: What is the difference between LM809M3-4.63/NOPB and LM809M3X-4.63/NOPB? A: Both parts are electrically identical with 4.63V threshold, push-pull output, and active-low reset. The difference is packaging format: LM809M3-4.63/NOPB is supplied in Cut Tape & Digi-Reel format, while LM809M3X-4.63/NOPB is supplied in Tape & Reel format. Select based on your assembly process requirements.
Q: Can I use ADM809LARTZ-REEL7 in place of LM809M3-4.63? A: Yes. The ADM809LARTZ-REEL7 meets all critical electrical parameters: 4.63V threshold, push-pull totem pole output, active-low reset, and 140ms minimum reset timeout. It is housed in the same SOT-23-3 package. The extended operating temperature range (-40°C to 125°C) provides additional thermal margin compared to the original part.
Q: Are all substitute parts RoHS compliant? A: All active substitute parts listed are ROHS3 compliant. The original LM809M3-4.63 is RoHS non-compliant. If RoHS compliance is required for your application, select from the active substitute parts.
Q: What is the difference between the Analog Devices ADM809 and Maxim MAX809 parts? A: Both the ADM809LARTZ-REEL7 and MAX809LEUR+T meet identical electrical specifications for the 4.63V threshold supervisor function. The ADM809 series offers extended temperature range (-40°C to 125°C), while the MAX809 maintains the original -40°C to 105°C range. Both are ROHS3 compliant and available in SOT-23-3 packaging.
Q: Can I mix different substitute parts in the same production run? A: All listed substitute parts are electrically and mechanically compatible. However, mixing different manufacturers or part numbers in the same production run may require separate qualification and testing protocols. Consult your quality and procurement procedures for multi-source component strategies.
Q: What packaging options are available for substitutes? A: Substitute parts are available in Cut Tape & Digi-Reel format (LM809M3-4.63/NOPB, ADM809LARTZ-REEL7, TCM809LVNB713, MAX809LEUR+T) and Tape & Reel format (LM809M3X-4.63/NOPB, APX809S-46SA-7). Select based on your assembly equipment and volume requirements.
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