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PMC251-S14
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PADAUK Tech Microcontroller Units (MCUs/MPUs/SOCs), SOP-14. 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
markdownPMC251-S14
PADAUK Tech · Microcontroller Units (MCUs/MPUs/SOCs) · SOP-14
PMC251-S14 from PADAUK Tech, in a SOP-14. 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 | PB5 | bidirectional | Port B bit 5, programmable as input or output with weak pull-up; wake-up from sleep is disabled when pbdier bit 5 is 0. |
| 2 | PB6 | bidirectional | Port B bit 6, programmable as input or output with weak pull-up; wake-up from sleep is disabled when pbdier bit 6 is 0. |
| 3 | PB7 | bidirectional | Port B bit 7, programmable as input or output with weak pull-up; wake-up from sleep is disabled when pbdier bit 7 is 0. |
| 4 | VDD | power_in | Positive power supply, operating range 2.2V to 5.5V. |
| 5 | PA7/X1 | bidirectional | Port A bit 7 (input/output with weak pull-up) or crystal oscillator X1 input; padier bit 7 must be 0 when used for crystal to avoid leakage current, which also disables wake-up. |
| 6 | PA6/X2 | bidirectional | Port A bit 6 (input/output with weak pull-up) or crystal oscillator X2 output; padier bit 6 must be 0 when used for crystal to avoid leakage current, which also disables wake-up. |
| 7 | PA5/PRST# | bidirectional | External reset input (PRST#) or Port A bit 5 as input or open-drain output with no pull-up or pull-down resistor; a 33 ohm series resistor is advised for high noise immunity when used as input. |
| 8 | PA3 | bidirectional | Port A bit 3, programmable as input or output with weak pull-up; wake-up from sleep is disabled when padier bit 3 is 0. |
| 9 | PA4 | bidirectional | Port A bit 4, programmable as input or output with weak pull-up; wake-up from sleep is disabled when padier bit 4 is 0. |
| 10 | PA0/INT0 | bidirectional | Port A bit 0 (input/output with weak pull-up) or external interrupt 0 on rising or falling edge; wake-up is disabled when padier bit 0 is 0. |
| 11 | GND | power_in | Ground. |
| 12 | PB0/INT1 | bidirectional | Port B bit 0 (input/output with weak pull-up) or external interrupt 1 on rising or falling edge; wake-up is disabled when pbdier bit 0 is 0. |
| 13 | PB1 | bidirectional | Port B bit 1, programmable as input or output with weak pull-up; wake-up from sleep is disabled when pbdier bit 1 is 0. |
| 14 | PB2 | bidirectional | Port B bit 2, programmable as input or output with weak pull-up; wake-up from sleep is disabled when pbdier bit 2 is 0. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | PADAUK Tech |
| Package | SOP-14 |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 14 |
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 | VDD | 2.2 | 5 | 5.5 | V | Ta = -40°C ~ 85°C | 11 |
| Input low voltage | VIL | 0 | 0.3 | V | max is 0.3VDD | 11 | |
| Input high voltage | VIH | 0.7 | V | min is 0.7VDD; max VDD | 11 | ||
| IO pin sink current | IOL | 7 | 10 | 13 | mA | VDD=5.0V, VOL=0.5V | 11 |
| IO pin drive current | IOH | -5 | -7 | -9 | mA | VDD=5.0V, VOH=4.5V | 11 |
| Input voltage | VIN | -0.3 | V | max is VDD+0.3 | 11 | ||
| Injected current on pin | IINJ(PIN) | 1 | mA | VDD+0.3≧VIN≧-0.3 | 11 | ||
| Pull-up resistance | RPH | 62 | KΩ | VDD=5.0V (values 62/100/210 for VDD=5.0/3.3/2.2V) | 11 | ||
| Low voltage detect, lowest setting | VLVD | 1.67 | 1.8 | 1.93 | V | 11 | |
| Low voltage detect, highest setting | VLVD | 3.86 | 4.15 | 4.44 | V | 11 | |
| IHRC output frequency after calibration | fIHRC | 15.68 | 16 | 16.32 | MHz | @25°C | 11 |
| IHRC output frequency after calibration | fIHRC | 14.72 | 16 | 17.28 | MHz | VDD=2.2V~5.5V, -40°C<Ta<85°C | 11 |
| ILRC output frequency | fILRC | 20.4 | 24 | 27.6 | KHz | VDD=5.0V, Ta=25°C | 12 |
| ILRC output frequency | fILRC | 15.6 | 24 | 32.4 | KHz | VDD=5.0V, -40°C<Ta<85°C | 12 |
| ILRC output frequency | fILRC | 10.2 | 12 | 13.8 | KHz | VDD=3.3V, Ta=25°C | 12 |
| ILRC output frequency | fILRC | 7.8 | 12 | 16.2 | KHz | VDD=3.3V, -40°C<Ta<85°C | 12 |
| Interrupt pulse width | tINT | 30 | ns | VDD=5V | 12 | ||
| Data memory retention voltage | VDR | 1.5 | V | Power-down mode | 12 | ||
| External reset pulse width | tRST | 120 | us | @VDD=5V | 12 | ||
| Operating current | IOP | 1.7 | mA | fSYS=[email protected] | 11 | ||
| Operating current | IOP | 8 | uA | fSYS=ILRC~[email protected] | 11 | ||
| Power-down current | IPD | 0.7 | uA | fSYS=0Hz, VDD=5.0V (stopsys) | 11 | ||
| Power-down current | IPD | 0.4 | uA | fSYS=0Hz, VDD=3.3V (stopsys) | 11 | ||
| Power-save current | IPS | 0.4 | mA | VDD=5.0V; Band-gap, LVD, IHRC, ILRC, Timer16 enabled (stopexe) | 11 | ||
| Supply voltage | 2.2 | 5.5 | V | 12 | |||
| Input voltage | -0.3 | V | max is VDD + 0.3V | 12 | |||
| Operating temperature | -40 | 85 | °C | 12 | |||
| Storage temperature | -50 | 125 | °C | 12 |
CAD (KiCad official)
- Symbol:
PMC251-S14 - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files:
pmc251-s14-etched.step/pmc251-s14-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pmc251-s14.step/pmc251-s14.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: PADAUK Tech datasheet (69 pp, sha256
3e75ba85c10b6e84, retrieved 2026-10-26, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).