component
MCP121T-240E
Public Made by Adomby adom
Microchip Tech Supervisor And Reset ICs, SC-70-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMCP121T-240E
Microchip Tech · Supervisor And Reset ICs · SC-70-3
MCP121T-240E from Microchip Tech, in a SC-70-3. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RST | output | Active-low open-drain reset output that is driven low when VDD falls below VTRIP; the MCP121 requires an external pull-up resistor. |
| 2 | VDD | power_in | Positive power supply input; the specified operating voltage range is 1.0 V to 5.5 V. |
| 3 | VSS | power_in | Ground reference pin for the device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SC-70-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating Voltage Range | VDD | 1 | 5.5 | V | 3 | ||
| Specified VDD Value to RST low | VDD | 1 | V | IRST = 10 µA, VRST < 0.2V | 3 | ||
| Operating Current (MCP121), Reset Power-up Timer Inactive | IDD | 1.75 | µA | Reset Power-up Timer (tRPU) Inactive | 3 | ||
| Operating Current (MCP121), Reset Power-up Timer Active | IDD | 20 | µA | Reset Power-up Timer (tRPU) Active | 3 | ||
| VDD Trip Point MCP1XX-240 | VTRIP | 2.285 | 2.32 | 2.355 | V | TA = +25°C (Note 1) | 4 |
| VDD Trip Point MCP1XX-240 | VTRIP | 2.262 | 2.32 | 2.378 | V | Note 2 | 4 |
| Threshold Hysteresis MCP1XX-240 | VHYS | 0.023 | 0.139 | V | 4 | ||
| RST Low-level Output Voltage | VOL | 0.4 | V | IOL = 500 µA, VDD = VTRIP(MIN) | 4 | ||
| Open-drain High Voltage on Output (MCP121 only) | VODH | 13.5 | V | VDD = 3.0V, Time voltage > 5.5V applied 100s, current into pin limited to 2 mA, 25°C operation recommended (Note 5, Note 6) | 4 | ||
| VDD Detect to RST Inactive (Reset Power-up Timer) | tRPU | 80 | 120 | 180 | ms | Figure 1-1 and CL = 50 pF | 5 |
| VDD Trip Point Tempco | TTPCO | -100 | 100 | ppm/°C | 4 | ||
| Specified Temperature Range (except MCP1XX-195) | TA | -40 | 125 | °C | Except MCP1XX-195 | 5 | |
| Maximum Junction Temperature | TJ | 150 | °C | 5 | |||
| Storage Temperature Range | TA | -65 | 150 | °C | 5 | ||
| VDD | VDD | 7 | V | 3 | |||
| Input current (VDD) | 10 | mA | 3 | ||||
| Output current (RST) | 10 | mA | 3 | ||||
| Rated Rise Time of VDD | 100 | V/µs | 3 | ||||
| All inputs and outputs (except RST) w.r.t. VSS | -0.6 | V | Upper limit printed as (VDD + 1.0V) | 3 | |||
| RST output w.r.t. VSS | -0.6 | 13.5 | V | 3 | |||
| Ambient temperature with power applied | -40 | 125 | °C | 3 | |||
| ESD protection on all pins | 2 | kV | ESD protection on all pins | 3 | |||
| Thermal Resistance, 3L-SC70 | θJA | 335 | °C/W | 3L-SC70 package | 5 |
CAD (KiCad official)
- Symbol:
MCP121T-240E - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SC-70-3 (KiCad packages3D, STEP)
- 3D model files:
mcp121t-240e-etched.step/mcp121t-240e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp121t-240e.step/mcp121t-240e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (28 pp, sha256
46a5e4721c4ef577, retrieved 2026-10-15, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).