MIC803-26D3VM3TR Microchip Integrated Circuit (Other) In Stock
Microchip MIC803-26D3VM3TR is a 3-pin microprocessor supervisor IC with a fixed 2.63 V reset threshold and 140 ms minimum reset pulse width in a SOT-23 package. Monitors supply voltage and asserts active-low reset output to protect microcontrollers during power-up, power-down, and brownout events. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 3
- Lifecycle
- TRANSFERRED
- Datasheet
- MIC803-26D3VM3TR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MIC803-26D3VM3TR?
- Fixed 2.63 V undervoltage reset threshold with ±2% accuracy for reliable 3.3 V supply monitoring without external components
- 140 ms guaranteed minimum reset pulse width ensuring complete microcontroller reset during power-up and brownout events
- Tiny 3-pin SOT-23 package consuming under 20 µA quiescent current for space-critical and battery-powered supervisor designs
What is MIC803-26D3VM3TR used for?
The MIC803-26D3VM3TR is used as the power-on reset and brownout detection circuit in microcontroller-based industrial control boards, consumer electronics, and IoT sensor nodes that operate from a regulated 3.3 V rail. Its fixed 2.63 V trip point ensures the MCU stays in reset until the supply is fully stable after power-up, preventing erratic firmware execution caused by insufficient Vcc. Embedded systems in remote monitoring equipment and smart meters also rely on it to trigger a clean reset during battery voltage collapse or intermittent connector events.
What are the specifications of MIC803-26D3VM3TR?
| Reach Compliance Code | Compliant |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.2V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.63V |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the MIC803-26D3VM3TR datasheet?
MIC803-26D3VM3TR Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MIC803-26D3VM3TR?
Compatible alternatives and drop-in replacements for MIC803-26D3VM3TR:
3-Pin Microprocessor Supervisor Circuit w/ Open-Drain Reset Output
3-Pin Microprocessor Supervisor Circuit w/ Open-Drain Reset Output
Voltage Supervisor/Reset IC, Fixed, 1 Channel, +2.93V, PDSO3
3-Pin Microprocessor Supervisor Circuit w/ Open-Drain Reset Output
3-Pin Microprocessor Supervisor Circuit w/ Open-Drain Reset Output
3-Pin Microprocessor Supervisor Circuit w/ Open-Drain Reset Output
Frequently Asked Questions
What reset threshold voltage does the MIC803-26D3VM3TR monitor and how accurately does it trip?
The MIC803-26D3VM3TR monitors the supply rail and asserts its active-low RESET output when Vcc falls below 2.63 V, with a threshold accuracy of ±2%. This precision ensures that a 3.3 V microcontroller system held in reset until the supply reaches at least 2.63 V experiences a clean, glitch-free boot sequence without relying on the MCU's own internal power-on reset circuitry, which often has wider tolerances.
How long does the MIC803-26D3VM3TR hold the reset signal active after power-up to guarantee MCU stability?
After Vcc rises above the 2.63 V threshold, the MIC803-26D3VM3TR holds the RESET pin asserted for a guaranteed minimum of 140 ms before releasing it high. This delay gives oscillators, PLLs, and external memory devices sufficient time to stabilize, ensuring the microcontroller does not begin executing instructions until all critical peripherals have reached their specified operating conditions.
How does the SOT-23 package of the MIC803-26D3VM3TR benefit board space in constrained designs?
The 3-pin SOT-23 measures approximately 2.9 mm × 1.3 mm with a 1.9 mm height, making it one of the smallest supervisor package options. With only 3 pins to route (Vcc, GND, and RESET), placement near the MCU reset pin requires minimal PCB area and no external resistors or capacitors, reducing BOM count and simplifying layout in densely populated single-board computers, wearables, and IoT modules.
What quiescent current does the MIC803-26D3VM3TR draw, and does it suit battery-powered supervisor circuits?
The MIC803-26D3VM3TR draws a quiescent supply current of typically under 20 µA during normal monitoring operation, making it negligible in the power budget of most battery-powered designs. For a system drawing 10 mA total, the supervisor adds less than 0.2% overhead, so it can remain continuously active in sleep-mode embedded systems without measurably reducing Li-ion or alkaline battery runtime.
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