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Texas Instruments MCP809M3-4.63/NOPB
- Part No.:
- MCP809M3-4.63/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP809M3-4.63/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,932
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Product details
Overview
MCP809M3-4.63/NOPB from Texas Instruments is a 3-pin active-low microprocessor reset supervisor IC designed to monitor +5V supply rails in embedded systems. It provides precise 4.63V ±3% threshold detection, 240ms typical reset pulse width, and guaranteed reset assertion down to VCC ≥1V - enabling reliable power-up, brown-out, and power-down reset signaling for MCU-based industrial controllers.
For engineers reviewing the MCP809M3-4.63/NOPB datasheet, MCP809M3-4.63/NOPB pinout, MCP809M3-4.63/NOPB application, or MCP809M3-4.63/NOPB equivalent, key selection criteria include factory-trimmed voltage accuracy over −40°C to +105°C, low 15µA supply current, SOT-23-3 package compatibility, and immunity to sub-100mV/20µs VCC transients.
Technical Context
The MCP809M3-4.63/NOPB integrates a precision bandgap reference, comparator, and internal timer to generate a deterministic reset pulse. Its reset threshold is factory-programmed to 4.63V with ±3% tolerance at +25°C and drift compensated to ≤30ppm/°C over temperature.
Upon VCC falling below the threshold, the active-low RESET output asserts immediately; after VCC rises above threshold, RESET remains asserted for a minimum 140ms (240ms typical) timeout - independent of VCC slew rate and immune to transients ≤20µs at 100mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±3% at +25°C; ensures valid reset for 5V nominal supplies within 90–95% range |
| Reset Pulse Width | 140ms min / 240ms typ; guarantees sufficient duration for full MCU initialization |
| Supply Current | 15µA typical at +25°C; enables use in battery-backed or ultra-low-power systems |
| Operating Temperature | −40°C to +105°C; supports industrial and automotive under-hood applications |
| VCC Range | 1.2V to 5.5V; allows reset assertion even during deep brown-out conditions |
| RESET Output Drive | Sinks 1.2mA at VOL ≤0.3V; compatible with standard CMOS/TTL input thresholds |
| Transient Immunity | Rejects VCC glitches ≤20µs wide and ≤100mV below threshold; reduces false resets |
Pinout & Package
Package: SOT-23-3 (DBZ), 1.12mm max height, RoHS-compliant tin (Sn) lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Open-drain output asserted low during reset; requires external pull-up for logic-high state |
| 2 | VCC | Supply input pin; monitors voltage rail; supports operation down to 1.2V |
| 3 | GND | Ground reference for internal comparator and output stage; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Precision Reset Threshold | Factory-trimmed 4.63V ±3% with ≤30ppm/°C tempco ensures consistent trip point across industrial temperature range |
| Guaranteed Reset Validity | RESET output remains functional down to VCC = 1V - critical for detecting partial brown-outs before complete failure |
| Low-Power Operation | 15µA typical ICC enables integration into always-on monitoring circuits without impacting system battery life |
| Transient Immunity | Immune to VCC glitches ≤20µs/100mV - eliminates spurious resets caused by switching noise or ESD coupling |
| Wide Temp Range Support | Specified from −40°C to +105°C with no derating required up to +70°C - suitable for unregulated industrial environments |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Monitoring 5V system rail in programmable logic controller CPU boards exposed to wide ambient temperature swings and electrical noise. IC Role / Device Role / Timing Role: Active-low reset supervisor asserting RESET until VCC stabilizes above 4.63V and holds for 240ms. Use Value: Prevents MCU lockup during cold cranking or load dump events by guaranteeing reset pulse integrity despite VCC sags and transients. |
Use Scenario: Power sequencing and fault detection in body control units powered from vehicle battery (9–16V) with local 5V LDO regulation. IC Role / Device Role / Timing Role: Brown-out detector triggering controlled shutdown when regulated 5V rail drops below 4.63V during ignition cycling. Use Value: Enables safe EEPROM write abort and GPIO state preservation before MCU reset - reducing firmware corruption risk. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
|
Use Scenario: Ensuring reliable boot sequence in portable ultrasound or glucose monitor devices using coin-cell or Li-ion backup power. IC Role / Device Role / Timing Role: Low-current (15µA) supervisor maintaining reset assertion during battery switchover and low-VCC conditions. Use Value: Eliminates boot failures during battery replacement by sustaining valid reset signal down to VCC = 1.2V. |
Use Scenario: Monitoring isolated 5V DC-DC output powering metrology SoC and communication interfaces in utility-grade electricity meters. IC Role / Device Role / Timing Role: Precision reset generator with 4.63V threshold aligned to 5V rail tolerance (±5%), ensuring compliance with IEC 62053-21. Use Value: Guarantees meter firmware restarts only after stable power is confirmed - preventing corrupted billing data during grid fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms min reset timeout, 1.5µA quiescent current | Optimized for 3.3V systems; lacks 4.63V option and transient immunity spec | Select when monitoring 3.3V rails with ultra-low-power priority and tighter layout constraints |
| MAX809TRD3T | 4.65V threshold, 140ms min reset pulse, 20µA ICC, −40°C to +85°C rating | Narrower temperature range; no 105°C support or ppm/°C tempco spec | Choose for cost-sensitive commercial applications where extended temp range is not required |
Compared with TPS3808G33DBVR and MAX809TRD3T, the MCP809M3-4.63/NOPB uniquely delivers 4.63V precision threshold with full industrial temperature coverage (−40°C to +105°C), verified transient immunity, and guaranteed reset validity down to VCC = 1V - making it the preferred choice for mission-critical 5V monitoring where reliability under stress is non-negotiable.
Availability
MCP809M3-4.63/NOPB is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical handheld diagnostics, smart energy meters, and battery-backed instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCP809M3-4.63/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade performance.
The MCP809 series belongs to TI's precision voltage supervisor product line, engineered specifically for deterministic power-monitoring in safety-critical and thermally demanding embedded systems where reset timing and threshold accuracy directly impact system robustness.
FAQ
What is the exact reset threshold voltage of the MCP809M3-4.63/NOPB and how does it vary with temperature?
The MCP809M3-4.63/NOPB has a factory-programmed reset threshold of 4.63V ±3% at +25°C. Over the full operating range (−40°C to +105°C), the threshold varies from 4.40V to 4.86V for the 4.63V variant, with a temperature coefficient of ≤30ppm/°C - ensuring predictable behavior in industrial thermal environments without recalibration.
Does the MCP809M3-4.63/NOPB remain functional when VCC drops below 1V?
No - the MCP809M3-4.63/NOPB guarantees RESET output validity only for VCC ≥1V. Below 1V, the internal circuitry cannot sustain defined logic states, and the RESET pin enters high-impedance. For operation near ground, TI recommends adding a 100kΩ pull-down resistor to maintain a known low state, as documented in the application note for MCP809M3-4.63/NOPB.
What is the minimum reset pulse width guaranteed by the MCP809M3-4.63/NOPB across temperature?
The MCP809M3-4.63/NOPB guarantees a minimum reset pulse width of 140ms over −40°C to +85°C, and 100ms over +85°C to +105°C. The typical value is 240ms at +25°C. This timeout begins when VCC rises above the reset threshold and is internally generated - independent of external components or VCC slew rate.
Can the MCP809M3-4.63/NOPB be used to monitor a 3.3V supply rail?
No - the MCP809M3-4.63/NOPB is specifically calibrated for 5V nominal systems, with a 4.63V threshold corresponding to 90–95% of 5V. For 3.3V rails, TI offers the MCP809M3-3.08/NOPB (3.08V threshold) or MCP809M3-2.93/NOPB (2.93V). Using MCP809M3-4.63/NOPB on 3.3V would cause immediate, continuous reset assertion.
What package type and marking does the MCP809M3-4.63/NOPB use?
The MCP809M3-4.63/NOPB is supplied in the SOT-23-3 (DBZ) package with a maximum height of 1.12mm. Its top-side marking is "SRD", per TI's packaging documentation. The device is RoHS-compliant, features Sn (tin) lead finish, and carries MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.
MCP809M3-4.63/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:
- 4.63V
- Output:
- -
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MCP809M3-4.63/NOPB FAQ
1.How can I place an order for MCP809M3-4.63/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP809M3-4.63/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of MCP809M3-4.63/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP809M3-4.63/NOPB is usually 5 days.
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5.How can I obtain technical support or documentation for MCP809M3-4.63/NOPB?
For technical support, including MCP809M3-4.63/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP809M3-4.63/NOPB requirements.
6.How does Aetrix verify that MCP809M3-4.63/NOPB is sourced from the original manufacturer or authorized distributors?
All MCP809M3-4.63/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 MCP809M3-4.63/NOPB meets industry standards.
7.What is the process for return or replacement of MCP809M3-4.63/NOPB?
All MCP809M3-4.63/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with MCP809M3-4.63/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 MCP809M3-4.63/NOPB part is unused and in its original packaging.
Return procedure for MCP809M3-4.63/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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