PIC16LF18855-E/SP - 14KB Flash 8-bit MCU 28-SPDIP | Microchip
N.º da peça: PIC16LF18855-E/SP ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.42 | $2,42 |
| 10 | $2.18 | $21,80 |
| 100 | $1.94 | $194,00 |
| 500 | $1.71 | $855,00 |
| 1.000 | $1.52 | $1.520,00 |
PIC16LF18855-E/SP Visão geral
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path and Harvard architecture, integrating CPU, Flash program memory, RAM, EEPROM, and configurable peripherals (ADC, timers, communication interfaces). Within the broader IC taxonomy, an MCU belongs to: microcontroller -> embedded controller -> digital IC -> semiconductor. The 'LF' prefix denotes the low-power (wide-range 1.8V–3.6V) variant, while '18855' identifies the specific die with 14 KB memory and rich analog/peripheral integration. The '-E' suffix indicates the -40°C to +125°C extended operating temperature range.
Key features include 25 I/O pins, 2 UART modules (EUSART), 2 SPI, 2 I²C, 10-bit ADC with up to 24 channels, 5-bit DAC, 2 comparators, and 4 8-bit timers plus 1 16-bit timer. The XLP technology enables sleep current down to ~30 nA typical with full RAM retention, ideal for battery-powered applications such as IoT sensor nodes, wearables, and remote controls.
The architecture uses a RISC-style 14-bit instruction set with 49 instructions and a 16-level hardware stack, complemented by a configurable instruction cache (PIC10/12/16/18 instruction-set compatibility) and a CWG/DSM module for advanced waveform generation. The 32 MHz internal oscillator supports USB and timing-critical motor-control loops.
Typical applications include home-automation controllers, battery-powered wireless sensor nodes, automotive body electronics (sub-systems), low-power IoT edge devices, HVAC thermostats, and small DC-motor or fan-control circuits. The SPDIP-28 footprint also makes it breadboard-friendly for prototype development and education.
Design consideration: choose this MCU when you need an easily solderable through-hole part for prototype or low-volume production, or when the wider 5V-tolerant SPDIP-28 footprint simplifies hand-rework. For high-volume surface-mount designs, consider the SOIC-28 (PIC16LF18855-E/SO) or QFN-28 (PIC16LF18855-E/ML) variants in the same silicon family.
This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the standalone manufacturer datasheet.
Alternativas drop-in para PIC16LF18855-E/SP — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC16LF18855-E/SP (mesmo formato e footprint) — diferindo em ADC, Comparators, DAC, Package, Maximum CPU Speed.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16LF18855-I/SP
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.95 / unidade
Ver ficha técnica →PIC16F18855-E/SP
✅ Drop-In✓ Em estoque
$1.47 / unidade
Ver ficha técnica →PIC16LF18854-E/SP
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC16LF18855-E/SP Classificações máximas e características elétricas
| Core | PIC16F 8-bit RISC, 14-bit instruction word |
| Family | PIC16LF18855 (XLP, low voltage 1.8-3.6V) |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data RAM | 1 KB |
| EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz (instruction cycle 250 ns) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 25 |
| Encapsulamento | 28-SPDIP (0.300 in / 7.62 mm body width) |
| Temperatura de operação | -40 C to +125 C (E suffix, extended) |
| ADC | 10-bit, up to 24 channels |
| DAC | 5-bit, 1 channel (8-bit DAC option) |
| Comparators | 2 |
| Timers | 4 x 8-bit + 1 x 16-bit (5 CCP/ECCP) |
| Communication | 2x EUSART, 2x SPI, 2x I2C |
| PWM Channels | Up to 8 (via CCP/ECCP + CWG/DSM) |
| Internal Oscillator | Yes, 32 MHz LF-HF selectable |
| Nível MSL | 1 (unlimited floor life, non-thermal) |
| Status RoHS | Compliant |
Configuração de pinos do PIC16LF18855-E/SP
| Pino 1 | MCLR/VPP — Master clear reset input / ICSP programming voltage |
| Pino 2 | RA0 — PORTA bit 0, analog/digital I/O |
| Pino 3 | RA1 — PORTA bit 1, analog/digital I/O |
| Pino 4 | RA2 — PORTA bit 2, analog/digital I/O |
| Pino 5 | RA3 — PORTA bit 3, analog/digital I/O |
| Pino 6 | RA4 — PORTA bit 4, analog/digital I/O |
| Pino 7 | RA5 — PORTA bit 5, analog/digital I/O |
| Pino 8 | VSS — Ground reference |
| Pino 9 | RA7 — PORTA bit 7, analog/digital I/O |
| Pino 10 | RA6 — PORTA bit 6, analog/digital I/O |
| Pino 11 | RC0 — PORTC bit 0, analog/digital I/O |
| Pino 12 | RC1 — PORTC bit 1, analog/digital I/O |
| Pino 13 | RC2 — PORTC bit 2, analog/digital I/O |
| Pino 14 | RC3 — PORTC bit 3, analog/digital I/O |
| Pino 15 | RC4 — PORTC bit 4, analog/digital I/O |
| Pino 16 | RC5 — PORTC bit 5, analog/digital I/O |
| Pino 17 | RC6 — PORTC bit 6, analog/digital I/O |
| Pino 18 | RC7 — PORTC bit 7, analog/digital I/O |
| Pino 19 | VSS — Ground reference |
| Pino 20 | VSS — Ground reference |
| Pino 21 | RB7 — PORTB bit 7, analog/digital I/O |
| Pino 22 | RB6 — PORTB bit 6, analog/digital I/O |
| Pino 23 | RB5 — PORTB bit 5, analog/digital I/O |
| Pino 24 | RB4 — PORTB bit 4, analog/digital I/O |
| Pino 25 | RB3 — PORTB bit 3, analog/digital I/O |
| Pino 26 | RB2 — PORTB bit 2, analog/digital I/O |
| Pino 27 | RB1 — PORTB bit 1, analog/digital I/O |
| Pino 28 | RB0 — PORTB bit 0, analog/digital I/O |
| Pino 29 | VDD — Positive supply input 1.8-3.6 V |
| Pino 30 | VDD — Positive supply input 1.8-3.6 V |
Aplicações típicas
PIC16LF18855-E/SP é adequado para 6 aplicaçãos: Battery-Powered IoT Sensor Node, HVAC Thermostat Control, Small DC Motor or Fan Control, Wearable Health Monitor, Automotive Body Electronics Sub-System, Industrial Sensor Transmitter (4-20 mA / 0-10 V).
Battery-Powered IoT Sensor Node
The PIC16LF18855-E/SP fits battery-powered IoT sensor nodes because its XLP architecture delivers tens of nA sleep current with full RAM retention, and 1.8-3.6 V operation is matched to a single Li-ion or 2xAA cell stack. The 14 KB Flash and 1 KB RAM host a small RTOS or cooperative scheduler plus sensor drivers. The 10-bit ADC with up to 24 channels multiplexes temperature, humidity, light, and analog sensor inputs, while two EUSART and two I2C interfaces connect to a transceiver module. With 25 I/O available on the 28-SPDIP, the MCU also serves as the wake-up controller for the radio. Designers should use the internal 32 MHz HF oscillator to reduce BOM cost and pair the MCU with a sub-GHz or BLE module for telemetry.
Recomendado
HVAC Thermostat Control
The PIC16LF18855-E/SP is well-suited to HVAC thermostat control where multiple temperature sensors, setpoint buttons, and a triac/relay driver are required. Its 10-bit ADC with up to 24 channels reads NTC thermistors for indoor, outdoor, and supply-air sensing; the two on-chip comparators implement zero-cross detection for triac dimming. The 5-bit DAC and PWM outputs drive LED backlights and a small graphic display, while EUSART or I2C connect to a Wi-Fi/BLE module for smart-thermostat networking. The -40C to +125C extended temperature range supports attic and boiler-room deployment where consumer-grade parts fail. The 28-SPDIP footprint also simplifies development board and hand-soldered prototype work.
Recomendado
Small DC Motor or Fan Control
The PIC16LF18855-E/SP handles small DC-motor and brushless-fan control loops using its CCP/ECCP modules plus the CWG and DSM waveform generators. Up to 8 PWM channels drive MOSFET half-bridges, while the 32 MHz CPU clock supports 8 kHz to 32 kHz PWM frequencies with sufficient resolution for closed-loop current limiting. The 10-bit ADC samples back-EMF and current shunt, and the comparators provide hardware fault detection that latches PWM within nanoseconds. The 28-SPDIP package is friendly to development on bench power supplies and motor-control reference boards. For higher-torque BLDC/PMSM applications, the dsPIC33EP256 family in the cross-reference list offers DSP-class motor-control peripherals on the same 3.3 V supply.
Recomendado
Wearable Health Monitor
The PIC16LF18855-E/SP fits wearable health-monitor applications because its XLP deep-sleep current in the tens of nA preserves battery life over months, while the 1.8-3.6 V supply works directly from a small Li-Po cell. The MCU aggregates heart-rate, SpO2, and motion-sensor data through I2C, while EUSART streams pre-processed samples to a BLE radio. The 14 KB Flash hosts a real-time sensor-fusion loop, and 25 I/O on the 28-SPDIP expose enough pins for haptic driver, button input, and battery gauge. The extended -40C to +125C temperature range survives skin-contact thermal swings. Compact SOIC-28 or QFN-28 variants are available when the wearable moves from prototype to high-volume SMT production.
Recomendado
Automotive Body Electronics Sub-System
The PIC16LF18855-E/SP supports automotive body-electronics sub-systems such as interior lighting, seat controllers, mirror adjusters, and accessory multiplexers where 32 MHz CPU and rich PWM are needed but full CAN stack is not. Its -40C to +125C extended temperature grade handles cabin and under-hood thermal stress, while EUSART links to a body-control gateway. The 10-bit ADC and comparators implement current sensing for LED drivers and short-circuit protection, and the 14 KB Flash stores calibration tables and diagnostic logs. For body modules that require AEC-Q100 compliance, designers should select the Q-graded variant of this family; for non-safety accessory controllers this E-suffix part is well-positioned.
Recomendado
Industrial Sensor Transmitter (4-20 mA / 0-10 V)
The PIC16LF18855-E/SP is a strong fit for industrial sensor transmitters that output 4-20 mA or 0-10 V analog signals proportional to a measured variable. The 10-bit ADC with up to 24 channels supports bridge, RTD, and 4-20 mA input conditioning, while the 5-bit DAC and PWM with low-pass filter generate precise analog output. The wide 1.8-3.6 V supply runs from a loop-powered 24 V system via a small buck converter, and the extended -40C to +125 C temperature rating covers outdoor and process-plant environments. The two EUSARTs allow simultaneous HART modem and RS-485 service; the 28-SPDIP through-hole package is friendly to ruggedized module construction. Designers should use the internal HF oscillator for stable 32 MHz timing.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16LF18855-E/SP — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16LF18855-I/SP | PIC16F18855-E/SP | PIC16LF18854-E/SP |
|---|---|---|---|---|
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | PIC16F 8-bit 32 MHz | PIC16F 8-bit 32 MHz | PIC16F 8-bit 32 MHz | PIC16F 8-bit 32 MHz |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B |
| Supply Voltage (VDD) | 1.8 - 3.6 V | 1.8 - 3.6 V | 1.8 - 5.5 V (wider range) | 1.8 - 3.6 V |
| Operating Temperature | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +125 C (E) | -40 C to +125 C (E) |
Principais diferenciais
- Extended temperature grade for industrial/automotive sub-systems (vs PIC16LF18855-I/SP)
- Low-voltage XLP operation optimized for battery-powered designs (vs PIC16F18855-E/SP)
- Highest pin count in the 18855 SPDIP family with full peripheral set (vs PIC16LF18854-E/SP)
Notas de projeto
The PIC16LF18855-E/SP supports XLP deep-sleep modes with typical current in the tens of nA and full RAM retention when the LFINTOSC and peripherals are off. To minimize sleep current, ensure all unused I/O are configured as outputs (not floating inputs), the ADC is disabled, and the MCLR pin uses the internal weak pull-up configuration. Switching from HFINTOSC to LFINTOSC before sleep reduces the wake-up current spike; a 1 uF ceramic VDD bulk cap within 5 mm of pin 29/30 handles transient bursts when waking into active mode.
For the 28-SPDIP layout, place a 0.1 uF decoupling capacitor within 3 mm of the VDD pins (29/30) and a bulk 1-10 uF capacitor on the same VDD net to suppress switching transients from the digital core. The exposed leads on SPDIP also act as a thermal path; for high PWM duty cycles driving MOSFET gates, route the high-current ground return directly to the VSS pins (8, 19, 20) using a star topology to avoid digital noise coupling into the analog ADC channels.
Do not leave MCLR floating: tie pin 1 to VDD through a 10 kohm pull-up or use the internal MCLR enable configuration in the configuration words. The ICSP programming pins (RB7/RA5/MCLR) must not be repurposed as outputs driving external loads during development, as this prevents in-circuit programming. Confirm the configuration word settings (FOSC, WDTE, PWRTE, BOREN) before code generation, since incorrect values are the most common cause of bricked PIC16LF18855 prototypes. Always include a 1 kohm resistor in series with MCLR if a push-button reset is used, to limit inrush current.
Route the ADC analog inputs (RA0-RA5) over a continuous ground plane and keep digital traces (PWM, EUSART) at least 5 mm away to minimize coupled noise. If the design uses both ADC and PWM on the same die, place an LC pi-filter on the digital supply or use separate ferrite beads to isolate the AVdd tap from the main VDD. For designs requiring 12-bit ADC precision, choose PIC16LF1768-E/SO instead, as the 18855 uses a 10-bit ADC.
Informações de conformidade
RoHS compliant per Microchip product page. -E suffix indicates -40C to +125C extended industrial temperature grade but is not AEC-Q100 qualified; for automotive safety-critical applications, select the Q-graded variant. Lead-free and halogen-free per Microchip Material Composition Declaration.
