# PIC16F18346T-I

**Microchip Tech** · Microcontroller Units (MCUs/MPUs/SOCs) · SOIC-20-300mil

PIC16F18346T-I from Microchip Tech, in a SOIC-20-300mil. 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 | VDD | power_in | Positive supply; 2.3V to 5.5V for PIC16F18346 (1.8V to 3.6V for the LF version), must be connected and decoupled with a 0.1 µF capacitor. |
| 2 | RA5 | bidirectional | General purpose I/O with ANA5 ADC input, T1CKI/T3CKI/T5CKI timer clock inputs, SOSCIN/SOSCI secondary oscillator, and CLKIN/OSC1 external clock or crystal connection. |
| 3 | RA4 | bidirectional | General purpose I/O with ANA4 ADC input, T1G/T3G/T5G gate inputs, CCP4 input, SOSCO secondary oscillator, and CLKOUT (FOSC/4) or OSC2 crystal connection. |
| 4 | RA3/MCLR/VPP | input | Input-only pin serving as general purpose input, Master Clear reset with internal weak pull-up (MCLR), or programming voltage input (VPP). |
| 5 | RC5 | bidirectional | General purpose I/O with ANC5 ADC input, MDCIN2 modular carrier input and CCP1 input. |
| 6 | RC4 | bidirectional | General purpose I/O with ANC4 ADC input. |
| 7 | RC3 | bidirectional | General purpose I/O with ANC3 ADC input, C1IN3-/C2IN3- comparator negative inputs, MDMIN modular source input, CCP2 input and CLCIN1 input. |
| 8 | RC6 | bidirectional | General purpose I/O with ANC6 ADC input and SS1 slave select input. |
| 9 | RC7 | bidirectional | General purpose I/O with ANC7 ADC input. |
| 10 | RB7 | bidirectional | General purpose I/O with ANB7 ADC input and SCK2 SPI clock / SCL2 I2C clock. |
| 11 | RB6 | bidirectional | General purpose I/O with ANB6 ADC input and SCK1 SPI clock / SCL1 I2C clock. |
| 12 | RB5 | bidirectional | General purpose I/O with ANB5 ADC input, SDI2 SPI data in / SDA2 I2C data, EUSART RX/DT and CLCIN3 input. |
| 13 | RB4 | bidirectional | General purpose I/O with ANB4 ADC input, SDI1 SPI data in / SDA1 I2C data and CLCIN2 input. |
| 14 | RC2 | bidirectional | General purpose I/O with ANC2 ADC input, C1IN2-/C2IN2- comparator negative inputs and MDCIN1 modular carrier input. |
| 15 | RC1 | bidirectional | General purpose I/O with ANC1 ADC input and C1IN1-/C2IN1- comparator negative inputs. |
| 16 | RC0 | bidirectional | General purpose I/O with ANC0 ADC input and C2IN0+ comparator positive input. |
| 17 | RA2 | bidirectional | General purpose I/O with ANA2 ADC input, VREF- and DAC1REF- reference inputs, T0CKI, CCP3, CWG1IN/CWG2IN, CLCIN0 and INT external interrupt inputs. |
| 18 | RA1/ICSPCLK | bidirectional | General purpose I/O with ANA1 ADC input, VREF+, C1IN0-/C2IN0-, DAC1REF+, SS2 slave select input, and ICDCLK/ICSPCLK debug and programming clock. |
| 19 | RA0/ICSPDAT | bidirectional | General purpose I/O with ANA0 ADC input, C1IN0+ comparator input, DAC1OUT analog output, and ICDDAT/ICSPDAT debug and programming data. |
| 20 | VSS | power_in | Ground reference; must be connected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-20-300mil |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 20 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (FOSC ≤ 16 MHz) | VDD | 2.3 |  | 5.5 | V | FOSC ≤ 16 MHz | 414 |
| Supply voltage (FOSC > 16 MHz) | VDD | 2.5 |  | 5.5 | V | FOSC > 16 MHz | 414 |
| RAM data retention voltage | VDR | 1.7 |  |  | V | Device in Sleep mode | 414 |
| Power-on Reset release voltage | VPOR |  | 1.6 |  | V | BOR and LPBOR disabled | 414 |
| Power-on Reset rearm voltage | VPORR |  | 1.5 |  | V | BOR and LPBOR disabled | 414 |
| VDD rise rate for internal POR | SVDD | 0.05 |  |  | V/ms | BOR and LPBOR disabled | 414 |
| Supply current XT 4 MHz | IDDXT4 |  | 332 | 479 | uA | XT = 4 MHz, VDD = 3.0V | 416 |
| Supply current HFO 16 MHz | IDDHFO16 |  | 1.4 | 1.9 | mA | HFO = 16 MHz, VDD = 3.0V | 416 |
| Supply current HFO 32 MHz | IDDHFOPLL |  | 2.3 | 2.9 | mA | HFO = 32 MHz, VDD = 3.0V | 416 |
| Supply current HS+PLL 32 MHz | IDDHSPLL32 |  | 2.3 | 2.9 | mA | HS+PLL = 32 MHz, VDD = 3.0V | 416 |
| Power-down current base (VREGPM = 1), max at +85°C | IPD |  | 0.4 | 2.5 | uA | VDD = 3.0V, VREGPM = 1; max at +85°C (6 uA max at +125°C) | 417 |
| Power-down current base (VREGPM = 0), max at +85°C | IPD |  | 13 | 22 | uA | VDD = 3.0V, VREGPM = 0; max at +85°C (27 uA max at +125°C) | 417 |
| Watchdog timer power-down current, max at +85°C | IPD_WDT |  | 1.1 | 3.3 | uA | VDD = 3.0V; max at +85°C (6.6 uA max at +125°C) | 417 |
| Input low voltage, TTL buffer | VIL |  |  | 0.8 | V | 4.5V ≤ VDD ≤ 5.5V | 418 |
| Input low voltage, SMBus levels | VIL |  |  | 0.8 | V | 2.7V ≤ VDD ≤ 5.5V | 418 |
| Input high voltage, TTL buffer | VIH | 2 |  |  | V | 4.5V ≤ VDD ≤ 5.5V | 418 |
| Input high voltage, SMBus levels | VIH | 2.1 |  |  | V | 2.7V ≤ VDD ≤ 5.5V | 418 |
| Input leakage current, I/O ports (85°C) | IIL | -125 | 5 | 125 | nA | VSS ≤ VPIN ≤ VDD, pin at high-impedance, 85°C | 418 |
| Input leakage current, I/O ports (125°C) | IIL | -1000 | 5 | 1000 | nA | VSS ≤ VPIN ≤ VDD, pin at high-impedance, 125°C | 418 |
| Weak pull-up current | IPUR | 25 | 120 | 200 | uA | VDD = 3.0V, VPIN = VSS | 418 |
| Output low voltage, I/O ports | VOL |  |  | 0.6 | V | IOL = 10.0 mA, VDD = 3.0V | 418 |
| I/O pin capacitance | CIO |  | 5 | 50 | pF |  | 418 |
| Brown-out Reset voltage BORV = 0 | VBOR | 2.55 | 2.7 | 2.85 | V | BORV = 0 | 428 |
| Brown-out Reset voltage BORV = 1 | VBOR | 2.3 | 2.45 | 2.6 | V | BORV = 1 (PIC16F18326/18346) | 428 |
| Calibrated HFINTOSC frequency accuracy | FHFOSC | 3.92 | 4 | 4.08 | MHz | 25°C | 423 |
| ADC integral error | EIL | -1 | 0.1 | 1 | LSb | ADCREF+ = 3.0V, ADCREF- = 0V | 429 |
| ADC differential error | EDL | -1 | 0.1 | 1 | LSb | ADCREF+ = 3.0V, ADCREF-= 0V | 429 |
| Fixed Voltage Reference 1x accuracy | VFVR1 | -4 |  | 4 | % | VDD ≥ 2.5V, -40°C to 85°C | 432 |
| Fixed Voltage Reference 4x accuracy | VFVR4 | -5 |  | 5 | % | VDD ≥ 4.75V, -40°C to 85°C | 432 |
| Voltage on VDD pin w.r.t. VSS | VDD | -0.3 |  | 6.5 | V | PIC16F18326/18346 | 411 |
| Voltage on MCLR pin |  | -0.3 |  | 9 | V | with respect to VSS | 411 |
| Storage temperature |  | -65 |  | 150 | °C |  | 411 |
| Maximum current on any I/O pin |  |  |  | 50 | mA |  | 411 |
| Total power dissipation | PD |  |  | 800 | mW |  | 411 |
| Operating ambient temperature, extended | TA | -40 |  | 125 | °C | Extended temperature | 412 |
| Thermal resistance junction to ambient | θJA |  | 77.7 |  | °C/W | 20-pin SOIC package | 420 |
| Thermal resistance junction to case | θJC |  | 23.1 |  | °C/W | 20-pin SOIC package | 420 |
| Maximum junction temperature | TJMAX |  |  | 150 | °C |  | 420 |

## CAD (KiCad official)

- Symbol: `PIC16F18346T-I`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `pic16f18346t-i-etched.step` / `pic16f18346t-i-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pic16f18346t-i.step` / `pic16f18346t-i.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Microchip Tech datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/40001839E.pdf) (500 pp, sha256 `caaf66beaba7d548`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/pic16f18346t-i-datasheet.pdf)