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Texas Instruments LM810M3-4.63
- Part No.:
- LM810M3-4.63
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM810M3-4.63.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,949
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Product details
Overview
LM810M3-4.63 from Texas Instruments is a 3-pin SOT-23 microprocessor supervisory IC with factory-programmed 4.63 V reset threshold, active-high RESET output, 240 ms typical reset timeout, 15 µA typical supply current, and operation from –40°C to +105°C. It monitors 5-V supply rails in embedded controllers and industrial microprocessor systems to ensure reliable power-up, brown-out, and power-down reset assertion.
For engineers reviewing the LM810M3-4.63 datasheet, LM810M3-4.63 pinout, LM810M3-4.63 application, or LM810M3-4.63 equivalent, key selection criteria include reset threshold accuracy (±70 mV at 25°C), guaranteed RESET validity down to VCC ≥ 1 V, immunity to VCC transients ≤ 20 µs, and compatibility with bidirectional µP reset pins via external 4.7-kΩ pullup.
Technical Context
The LM810M3-4.63 implements a precision bandgap-based voltage comparator with internal hysteresis to detect VCC falling below 4.63 V ±70 mV at 25°C, holding RESET high for ≥140 ms after recovery. Its internal timer ensures a fixed 240 ms typical reset pulse width independent of VCC slew rate or noise.
Unlike open-drain supervisors, LM810M3-4.63 features a push-pull active-high RESET output capable of sourcing 150 µA at 0.8×VCC (1.8 V < VCC < VTH(min)) and sinking 3.2 mA at VCC = 4.63 V (max), eliminating need for external pullup resistors in most 5-V logic interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V ±70 mV at 25°C; tight tolerance ensures valid reset for 5-V supplies at 90–95% nominal voltage. |
| Reset Timeout | 240 ms typical; guarantees sufficient hold time for microprocessor initialization sequences. |
| Supply Current | 15 µA typical at 25°C; enables use in battery-powered equipment with multi-year standby life. |
| Operating Temp | –40°C to +105°C; qualified for industrial and automotive under-hood environments. |
| VCC Range | 1.0 V to 5.5 V; RESET remains valid even during deep brown-out conditions. |
| Output Type | Active-high push-pull; drives CMOS/TTL loads directly without external components. |
| Transient Immunity | Rejects VCC glitches ≤ 20 µs duration when 100 mV below threshold; reduces false resets in noisy power systems. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount outline with pin 1 (GND) in Q3 quadrant per tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Provides return path for internal comparator and output driver; must be connected to system ground plane for stable threshold reference. |
| RESET (Pin 2) | Active-high output | Drives high during VCC fault or startup; sinks 3.2 mA at VCC = 4.63 V (max); requires no external pullup for standard 5-V logic. |
| VCC (Pin 3) | Supply input | Monitored voltage rail; accepts 1.0–5.5 V; includes internal ESD protection and transient filtering capability. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63 V threshold | ±70 mV tolerance at 25°C ensures reliable detection of 5-V supply droop before microprocessor malfunction. |
| 240 ms fixed reset timeout | Guaranteed minimum 140 ms hold time eliminates need for external RC timing networks. |
| 15 µA ultra-low quiescent current | Enables integration into always-on subsystems without compromising battery runtime. |
| VCC ≥ 1 V RESET validity | Maintains defined logic state during deep brown-out, preventing undefined processor behavior. |
| 20 µs VCC transient rejection | Immunity to fast supply glitches avoids spurious resets in electrically noisy industrial environments. |
Applications
| Industrial PLC Controller | Smart Energy Meter |
|---|---|
Use Scenario: Monitors 5-V auxiliary supply in programmable logic controller I/O modules during AC line sags and generator switchover. IC Role / Device Role / Timing Role: Provides deterministic power-on reset and brown-out detection to prevent firmware corruption during unstable mains conditions. Use Value: 4.63 V threshold aligns with 5-V rail derating limits; 240 ms timeout exceeds PLC boot sequence requirements. | Use Scenario: Supervises microcontroller supply in utility-grade electricity meters exposed to wide temperature swings and conducted EMI. IC Role / Device Role / Timing Role: Active-high RESET output interfaces directly with meter SoC's reset pin without level-shifting components. Use Value: –40°C to +105°C rating supports outdoor deployment; 15 µA current minimizes self-heating in sealed enclosures. |
| Factory Automation HMI | Automotive Body Control Module |
Use Scenario: Ensures clean startup of ARM-based human-machine interface displays after 12-V DC-DC converter stabilization. IC Role / Device Role / Timing Role: Detects 5-V rail collapse during CAN bus load dumps and initiates controlled UI reboot. Use Value: Push-pull output drives display controller reset pin directly; transient immunity prevents false triggers during relay switching. | Use Scenario: Monitors 5-V microcontroller supply in body control units subjected to cold cranking and load dump transients. IC Role / Device Role / Timing Role: Generates reset pulse during battery voltage recovery after engine start, ensuring MCU firmware integrity. Use Value: Valid operation down to VCC = 1 V accommodates cold-cranking dips; 4.63 V threshold avoids nuisance resets during normal 13.5–14.5 V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX810LUR46-T | 4.63 V threshold, active-high output, but 20 µA max supply current and only rated to +85°C. | Limited to commercial-temperature applications; lacks extended industrial temp range. | Select MAX810LUR46-T only for cost-sensitive consumer designs where ambient stays below 85°C. |
| TPS3808G33DBVR | 3.3 V threshold, adjustable delay, 1.5 µA quiescent current, but requires external capacitor for timing. | Not a direct voltage match; designed for 3.3-V systems, not 5-V monitoring. | Choose TPS3808G33DBVR only when migrating to lower-voltage microcontrollers and requiring programmable timeout. |
Compared with MAX810LUR46-T and TPS3808G33DBVR, LM810M3-4.63 delivers guaranteed industrial temperature operation, fixed 240 ms timeout without external components, and precise 4.63 V threshold optimized for legacy 5-V microprocessor rails-making it the preferred choice for robust industrial and automotive reset supervision.
Availability
LM810M3-4.63 is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, factory automation HMIs, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM810M3-4.63 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and microcontroller solutions.
The LM810 series belongs to TI's microprocessor supervisory product line, engineered specifically for reliable power-on reset, brown-out detection, and supply voltage monitoring in industrial, automotive, and computing systems.
FAQ
What is the exact reset threshold voltage for LM810M3-4.63 and how does it vary with temperature?
The LM810M3-4.63 has a factory-programmed reset threshold of 4.63 V, with tolerance of ±70 mV at 25°C. Over the full operating range (–40°C to +105°C), the threshold varies from 4.40 V to 4.86 V, corresponding to a temperature coefficient of 30 ppm/°C as specified in the Electrical Characteristics table.
Does LM810M3-4.63 require an external pullup resistor on its RESET pin?
No, LM810M3-4.63 features a push-pull active-high RESET output and does not require an external pullup resistor for standard 5-V logic interfacing. However, TI recommends a 100-kΩ pullup to VCC if RESET validity must be maintained when VCC falls below 1 V.
What is the minimum VCC voltage at which LM810M3-4.63 guarantees valid RESET output behavior?
LM810M3-4.63 ensures valid RESET output for VCC ≥ 1 V across the full temperature range. Below 1 V, the output may become undefined; for sub-1-V operation, TI recommends adding a 100-kΩ pullup resistor from RESET to VCC.
How does the 240 ms reset timeout of LM810M3-4.63 behave over temperature and supply voltage?
The reset timeout is guaranteed ≥140 ms over –40°C to +85°C and ≥100 ms up to +105°C. Typical value remains 240 ms across VCC = 1.0 V to 5.5 V and temperature, with variation shown in Figure 5 of the datasheet; no external components affect this timing.
Can LM810M3-4.63 interface directly with microprocessors that have bidirectional reset pins?
Yes, LM810M3-4.63 can interface with bidirectional reset pins such as those on Motorola 68HC11 derivatives. TI recommends using a 4.7-kΩ series resistor between the LM810M3-4.63 RESET pin and the µP reset pin to prevent contention during bidirectional state transitions.
LM810M3-4.63 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM810M3-4.63 FAQ
1.How can I place an order for LM810M3-4.63 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM810M3-4.63 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM810M3-4.63 reliable?
The price and inventory of LM810M3-4.63 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM810M3-4.63 is usually 5 days.
3.What payment methods are accepted for LM810M3-4.63?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM810M3-4.63 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM810M3-4.63?
LM810M3-4.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM810M3-4.63 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM810M3-4.63?
For technical support, including LM810M3-4.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM810M3-4.63 requirements.
6.How does Aetrix verify that LM810M3-4.63 is sourced from the original manufacturer or authorized distributors?
All LM810M3-4.63 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM810M3-4.63 meets industry standards.
7.What is the process for return or replacement of LM810M3-4.63?
All LM810M3-4.63 units undergo pre-shipment inspection (PSI). If there is an issue with LM810M3-4.63, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM810M3-4.63 part is unused and in its original packaging.
Return procedure for LM810M3-4.63:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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