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Texas Instruments LM810M3-2.93/NOPB
- Part No.:
- LM810M3-2.93/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM810M3-2.93/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,099
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Product details
Overview
LM810M3-2.93/NOPB from Texas Instruments is a 3-pin SOT-23 active-high microprocessor reset supervisor IC monitoring VCC at 2.93 V ±3% threshold, delivering 240-ms typical reset pulse width, 15-µA typical supply current, and guaranteed operation down to VCC ≥1 V. It ensures reliable power-up, brown-out, and power-down reset assertion in embedded controllers and industrial automation systems.
For engineers reviewing the LM810M3-2.93/NOPB datasheet, LM810M3-2.93/NOPB pinout, LM810M3-2.93/NOPB application, or LM810M3-2.93/NOPB equivalent, key selection criteria include reset threshold accuracy (±3% over –40°C to 105°C), active-high output compatibility with bidirectional µP reset pins, transient immunity (20-µs rejection for 100-mV overdrive), and SOT-23 footprint suitability for space-constrained designs.
Technical Context
The LM810M3-2.93/NOPB integrates a precision voltage comparator with factory-trimmed 2.93-V reference and internal timing circuitry to generate a fixed 240-ms reset pulse after VCC rises above threshold. Its active-high RESET output remains asserted while VCC is below 2.93 V and for 240 ms after crossing the threshold.
It operates across –40°C to 105°C with 30 ppm/°C temperature coefficient on threshold, supports VCC from 1.0 V to 5.5 V, and maintains valid output down to VCC = 1 V-requiring only a 4.7-kΩ pullup resistor for full-voltage-range validity per TI application guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±3% at 25°C; tight tolerance ensures reliable detection of 3.3-V supply brown-out (86–90% of nominal) |
| Reset Pulse Width | 240 ms typical; guarantees sufficient time for microprocessor initialization before release |
| Supply Current | 15 µA typical at 25°C; enables use in battery-powered equipment without significant drain |
| VCC Operating Range | 1.0 V to 5.5 V; ensures functional reset assertion even during deep brown-out conditions |
| Output Type | Active-high RESET; directly interfaces with µP reset pins requiring high-valid logic without external inversion |
| Temperature Range | –40°C to +105°C; qualified for industrial and automotive under-hood environments |
| ESD Rating | ±2000 V HBM; meets standard handling requirements for automated assembly lines |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with gull-wing leads.
| 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 |
| RESET (Pin 2) | Active-high reset output | Drives high when VCC < 2.93 V or during 240-ms timeout; sinks 1.2 mA max at VTH(max) for robust logic-level drive |
| VCC (Pin 3) | Supply input | Monitored voltage source; accepts 1.0–5.5 V; requires 0.1-µF bypass capacitor placed adjacent to pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93-V threshold | ±3% tolerance over full temperature range ensures consistent brown-out detection for 3.3-V systems |
| 240-ms reset timeout | Guaranteed minimum 140 ms, typical 240 ms, and up to 560 ms over temperature-covers worst-case µP boot timing |
| Low 15-µA supply current | Enables integration into always-on subsystems without compromising battery life in portable instrumentation |
| VCC ≥1 V output validity | RESET remains high until VCC drops below 1 V, preventing undefined states during deep undervoltage events |
| Transient immunity | Rejects 20-µs negative transients ≤100 mV below threshold-reduces false resets in noisy industrial power rails |
Applications
| Factory Automation | Building Automation |
|---|---|
Use Scenario: PLC I/O modules powered from 3.3-V regulated supplies subject to line fluctuations and EMI. IC Role / Device Role / Timing Role: Monitors 3.3-V rail and asserts active-high RESET to ARM Cortex-M7 controller during brown-out. Use Value: Prevents firmware corruption by holding processor in reset until stable 3.3-V supply is restored for ≥240 ms. |
Use Scenario: HVAC control panel with battery-backed real-time clock and sensor interface ICs. IC Role / Device Role / Timing Role: Provides clean power-on reset to MSP430 microcontroller upon AC power restoration. Use Value: Eliminates need for discrete RC reset networks-reduces BOM count and improves timing repeatability. |
| Programmable Logic Control | Renewable Energy |
Use Scenario: Industrial safety controller requiring deterministic startup sequence after emergency stop recovery. IC Role / Device Role / Timing Role: Generates precise 240-ms active-high reset pulse synchronized to 3.3-V FPGA core rail. Use Value: Ensures FPGA configuration completes before peripheral initialization begins-avoids metastability. |
Use Scenario: Solar charge controller with dual-supply architecture (5-V analog sensing, 3.3-V digital logic). IC Role / Device Role / Timing Role: Supervises 3.3-V logic rail and triggers reset if photovoltaic input drops below MPPT threshold. Use Value: Maintains system integrity during partial shading events without requiring software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX810LUR29+T | 2.93-V threshold, active-high output, but 20-µA max supply current vs LM810M3-2.93/NOPB's 15-µA typical; 160-ms min reset pulse | Valid for cost-sensitive consumer-grade designs where 80-ms shorter minimum timeout is acceptable | Select when lower unit cost outweighs need for extended reset hold time and tighter current spec |
| TPS3808G33DBVR | 3.3-V threshold (not 2.93 V), adjustable delay option, 1.6-µA quiescent current, but requires external capacitor for timing | Used where programmable reset duration or ultra-low-power sleep mode is required-not direct voltage-match replacement | Choose only if design requires configurable timeout or sub-µA standby current; not a drop-in substitute for 2.93-V monitoring |
Compared with MAX810LUR29+T, LM810M3-2.93/NOPB offers longer guaranteed reset hold time and lower typical supply current; versus TPS3808G33DBVR, it provides fixed 2.93-V threshold without external components but lacks programmability and ultra-low-quiescent capability.
Availability
LM810M3-2.93/NOPB is available at Aetrix Electronics and suitable for factory automation, building automation, and programmable logic control applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant SOT-23 packaging.
Supply support for LM810M3-2.93/NOPB 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 leader specializing in analog and embedded processing technologies, with over 50 years of innovation in power management, signal chain, and microcontroller solutions.
The LM810 series belongs to TI's microprocessor supervisory product line, designed specifically to provide precision voltage monitoring and deterministic reset timing for industrial, automotive, and computing systems operating across wide temperature ranges.
FAQ
What is the exact reset threshold voltage of LM810M3-2.93/NOPB and how does it vary with temperature?
The LM810M3-2.93/NOPB has a factory-programmed reset threshold of 2.93 V with ±3% tolerance at 25°C. Over –40°C to +85°C, the threshold remains within 2.85 V to 3.00 V; at 85°C to 105°C, it shifts to 2.78 V to 3.08 V. Its temperature coefficient is 30 ppm/°C, ensuring predictable drift across industrial operating conditions. This specification is confirmed in Section 6.5 of the SNVS052E datasheet for LM810M3-2.93/NOPB.
Does LM810M3-2.93/NOPB support active-high reset output, and what is its drive capability?
Yes, LM810M3-2.93/NOPB features an active-high RESET output (Pin 2) that drives high when VCC falls below 2.93 V or during the 240-ms timeout period. It sources up to 150 µA at 0.8×VCC when VCC is between 1.8 V and VTH(min), and maintains valid logic levels down to VCC = 1 V. A 4.7-kΩ pullup resistor to VCC is recommended for full-voltage-range validity, as specified in Figure 9 of the LM810 datasheet.
What is the minimum and typical reset pulse width for LM810M3-2.93/NOPB?
The LM810M3-2.93/NOPB guarantees a minimum reset active timeout of 140 ms over –40°C to +85°C, with a typical value of 240 ms. At elevated temperatures (85°C to 105°C), the minimum reduces to 100 ms and maximum extends to 840 ms. These values are measured from the moment VCC rises above the threshold until RESET deasserts, and are fully characterized in Table 6-5 of the SNVS052E datasheet.
Can LM810M3-2.93/NOPB operate reliably with VCC below 2.93 V, and down to what voltage does it maintain valid output?
Yes, LM810M3-2.93/NOPB remains functional and asserts RESET high for any VCC below 2.93 V. Its output is ensured valid for VCC ≥1 V across the full temperature range. Below 1 V, the output enters high-impedance state-TI recommends a 4.7-kΩ pullup resistor to VCC to maintain defined logic level, as documented in Section 7.3.1.2 of the datasheet for LM810M3-2.93/NOPB.
What package type and footprint does LM810M3-2.93/NOPB use, and are there tape-and-reel options available?
LM810M3-2.93/NOPB uses the SOT-23 (DBZ) package with 2.92 mm × 1.30 mm body size and gull-wing leads. It is supplied in tape-and-reel format: 1000 units per reel (SMALL T&R) and 3000 units per reel (LARGE T&R), both with 8.4-mm reel width and Q3 pin-1 quadrant orientation. This information is verified in the Package Option Addendum of the SNVS052E datasheet.
LM810M3-2.93/NOPB 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:
- 2.93V
- 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
LM810M3-2.93/NOPB FAQ
1.How can I place an order for LM810M3-2.93/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM810M3-2.93/NOPB 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 LM810M3-2.93/NOPB reliable?
The price and inventory of LM810M3-2.93/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM810M3-2.93/NOPB is usually 5 days.
3.What payment methods are accepted for LM810M3-2.93/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM810M3-2.93/NOPB transactions.
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LM810M3-2.93/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM810M3-2.93/NOPB 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 LM810M3-2.93/NOPB?
For technical support, including LM810M3-2.93/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM810M3-2.93/NOPB requirements.
6.How does Aetrix verify that LM810M3-2.93/NOPB is sourced from the original manufacturer or authorized distributors?
All LM810M3-2.93/NOPB 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 LM810M3-2.93/NOPB meets industry standards.
7.What is the process for return or replacement of LM810M3-2.93/NOPB?
All LM810M3-2.93/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM810M3-2.93/NOPB, 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 LM810M3-2.93/NOPB part is unused and in its original packaging.
Return procedure for LM810M3-2.93/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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