PIC16LF18857-E/SO - 56KB Flash 8-bit MCU 28-SOIC | Microchip
N.º de pieza: PIC16LF18857-E/SO ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.78 | $2,78 |
| 10 | $2.49 | $24,90 |
| 100 | $2.1 | $210,00 |
| 500 | $1.78 | $890,00 |
| 1.000 | $1.49 | $1.490,00 |
PIC16LF18857-E/SO Descripción general
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data bus, integrating a CPU, non-volatile Flash program memory, volatile RAM, EEPROM, timers, analog peripherals, and digital communication interfaces. PIC microcontrollers from Microchip occupy the mid-tier of the embedded hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The "LF" prefix indicates a wide-voltage 1.8 V to 3.6 V core, ideal for battery-powered designs where the standard F (5.5 V max) variant would waste energy through internal LDO dropout.
Key features include four 16-bit timers, two USART, two SPI, two I2C peripherals, a 10-bit ADC with up to channels, a Complementary Waveform Generator (CWG), and Core Independent Peripherals such as the Configurable Logic Cell (CLC) and Numerically Controlled Oscillator (NCO). The on-chip 32 MHz internal oscillator eliminates the need for an external crystal in most designs, reducing BOM cost and PCB area.
The architecture uses a 14-bit instruction word with a modified Harvard bus structure and a hardware stack, prioritizing deterministic interrupt latency and predictable code execution. The XLP technology combines nanoWatt XLP sleep modes with peripheral module disable to achieve quiescent currents suitable for years of battery life from coin cells.
Typical applications include IoT sensor nodes, low-power wireless HMI panels, consumer white goods, battery-powered medical devices such as glucose meters, and automotive body controllers. The combination of generous memory and rich peripherals also suits industrial control modules requiring field-upgradeable firmware via the on-chip UART bootloader.
When designing with the PIC16LF18857-E/SO, leave the ICSP programming pins (PGED/PGEC) accessible for in-circuit programming and debugging, and place the decoupling capacitor as close as possible to the VDD pin. Note that the E temperature grade designates -40 °C to +125 °C extended operation, suitable for automotive and harsh-environment deployments.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design considerations not found in the manufacturer datasheet.
Alternativas directas para PIC16LF18857-E/SO — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC16LF18857-E/SO (mismo factor de forma y huella) — difiere en Package, ADC, Operating Temperature, Program Memory (Flash), Family.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC16LF18855-E/SO
✅ Sustitución directa✓ En stock
$1.52 / unidad
Ver hoja de datos →PIC16LF18856-E/SP
✅ Sustitución directa✓ En stock
$1.32 / unidad
Ver hoja de datos →PIC16LF18857-E/ML
✅ Sustitución directa✓ En stock
$1.84 / unidad
Ver hoja de datos →PIC16LF18854-E/SS
✅ Sustitución directa✓ En stock
$1.38 / unidad
Ver hoja de datos →PIC16F18857-E/SO
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC16LF18876-E/SO
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC16LF18857-E/SO Valores máximos y características eléctricas
| Core | 8-bit PIC16 |
| Program Memory (Flash) | 56 KB (32K x 14 words) |
| RAM | 4 KB (4096 bytes) |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage (LF) | 1.8 V to 3.6 V |
| Encapsulado | 28-pin SOIC (SO, 0.295" / 7.50 mm body) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40 °C to +125 °C (E grade, extended) |
| ADC | 10-bit with computation |
| Timers | 4 x 16-bit / 2 x 8-bit |
| Communication | 2 x EUSART, 2 x SPI, 2 x I2C |
| Core Independent Peripherals | CLC, NCO, CWG, DSM, CCP |
| Estado RoHS | Compliant |
| ICSP Programming | PGED/PGEC |
Configuración de pines de PIC16LF18857-E/SO
| Pin 1 | RA0/ICSPDAT/PGED — Bidirectional I/O / ICSP data |
| Pin 2 | RA1/ICSPCLK/PGEC — Bidirectional I/O / ICSP clock |
| Pin 3 | RA2 — Bidirectional I/O |
| Pin 4 | RA3 — Bidirectional I/O / MCLR |
| Pin 5 | RA4 — Bidirectional I/O |
| Pin 6 | RA5 — Bidirectional I/O |
| Pin 7 | RA6 — Bidirectional I/O |
| Pin 8 | RA7 — Bidirectional I/O |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RB7 — Bidirectional I/O |
| Pin 11 | RB6 — Bidirectional I/O |
| Pin 12 | RB5 — Bidirectional I/O |
| Pin 13 | RB4 — Bidirectional I/O |
| Pin 14 | RB3 — Bidirectional I/O |
| Pin 15 | RB2 — Bidirectional I/O |
| Pin 16 | RB1 — Bidirectional I/O |
| Pin 17 | RB0 — Bidirectional I/O / interrupt-on-change |
| Pin 18 | RC0 — Bidirectional I/O |
| Pin 19 | RC1 — Bidirectional I/O |
| Pin 20 | RC2 — Bidirectional I/O |
| Pin 21 | RC3 — Bidirectional I/O |
| Pin 22 | RC4 — Bidirectional I/O |
| Pin 23 | RC5 — Bidirectional I/O |
| Pin 24 | RC6 — Bidirectional I/O |
| Pin 25 | RC7 — Bidirectional I/O |
| Pin 26 | VSS — Ground reference (secondary) |
| Pin 27 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pin 28 | VDD — Positive supply (secondary) |
Aplicaciones típicas
PIC16LF18857-E/SO es adecuado para 6 aplicacións: IoT Sensor Nodes, Battery-Powered Medical Devices, Consumer White Goods, Automotive Body Controllers, Industrial HMI Panels, Low-Power Wireless HMIs.
IoT Sensor Nodes
The PIC16LF18857-E/SO suits IoT sensor nodes thanks to XLP nanoWatt sleep modes that drop quiescent current to single-digit microamps between measurements. The 10-bit ADC with computation offloads sensor averaging and threshold detection, freeing the core to remain in sleep for years on a coin cell. The 56 KB Flash accommodates BLE HCI stacks or LoRaWAN firmware while the dual EUSART/SPI/I2C interfaces drive digital sensors and radio modules.
Recomendado
Battery-Powered Medical Devices
The PIC16LF18857-E/SO is well suited to battery-powered medical devices such as glucose meters, pulse oximeters, and portable nebulizers. Its 1.8 V to 3.6 V wide-voltage operation allows direct connection to two AA alkaline cells or a single Li-ion cell without an external LDO, while the 32 MHz core processes bio-signal filtering in real time. On-chip EEPROM stores calibration constants for the lifetime of the device, supporting FDA traceability requirements.
Recomendado
Consumer White Goods
The PIC16LF18857-E/SO fits consumer white goods such as washing machines, dishwashers, and refrigerators where it controls user interfaces, motor drivers, and sensor inputs. Its Core Independent Peripherals (CLC, NCO, CWG) implement hardware-based state machines that respond to faults in microseconds, improving safety. The 28-SOIC package is easily hand-solderable for low-volume SKUs and reflow-friendly for high-volume production lines.
Recomendado
Automotive Body Controllers
The PIC16LF18857-E/SO is appropriate for automotive body controllers including seat controllers, mirror modules, and lighting drivers thanks to its -40 °C to +125 °C extended temperature grade and robust peripheral set. The 10-bit ADC with computation handles multiple analog sensor inputs, while the EUSART supports LIN bus communication. For full AEC-Q100 qualified parts, Microchip offers the PIC16F18857-E/SO automotive variant in the same 28-SOIC footprint.
Recomendado
Industrial HMI Panels
The PIC16LF18857-E/SO powers industrial HMI panels by driving character or graphic LCDs, scanning keypads, and managing Modbus RTU communication over EUSART. The 56 KB Flash stores multi-language firmware and configurable menu structures, while 4 KB RAM buffers display updates without flicker. Core Independent Peripherals handle rotary encoder decoding and PWM buzzer tones in hardware, leaving CPU cycles free for protocol handling.
Recomendado
Low-Power Wireless HMIs
The PIC16LF18857-E/SO suits low-power wireless HMIs such as remote controls, smart thermostats, and BLE beacons where it bridges user inputs to a companion radio module. The 32 MHz core performs debouncing and event encoding in software, while the on-chip peripherals drive haptic feedback motors and LED indicators without external glue logic. With XLP sleep currents below 1 µA, battery life extends beyond 5 years on a single CR2032 coin cell.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC16LF18857-E/SO — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC16LF18855-E/SO | PIC16LF18856-E/SP | PIC16LF18854-E/SS | PIC16F18857-E/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (SO) | 28-SOIC (SO) | 28-SOIC (SO) | 28-SOIC (SO) | 28-SOIC (SO) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 56 KB | 32 KB | 40 KB | 32 KB | 56 KB |
| RAM | 4 KB | 2 KB | 3 KB | 2 KB | 4 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Temperature Grade | -40 °C to +125 °C (E) | -40 °C to +125 °C (E) | -40 °C to +125 °C (E) | -40 °C to +125 °C (E) | -40 °C to +125 °C (E) |
| Approx. Unit Price (1 pc, USD) | $2.78 | $2.50 (estimated, lower Flash) | $2.65 (estimated, mid Flash) | $2.45 (estimated, lower Flash) | $2.85 (estimated, F core) |
Diferenciadores clave
- Wide-voltage LF core for battery efficiency (frente a PIC16F18857-E/SO)
- 56 KB Flash for full protocol stacks (frente a PIC16LF18855-E/SO)
- Extended -40 °C to +125 °C operation (frente a PIC16LF18857-I/SO (industrial grade))
Notas de diseño
Place a 0.1 µF decoupling capacitor as close as possible to each VDD pin, with a 10 µF bulk capacitor on the main VDD rail. The PIC16LF18857-E/SO can operate from 1.8 V to 3.6 V; choose an LDO with sub-µA quiescent current (e.g. MCP1700) to preserve XLP nanoWatt sleep performance. Estimated: at 32 MHz active current of ~2.2 mA plus sleep current of ~0.6 µA, average system current for a 1% duty cycle sensor node is ~22 µA.
Route the ICSP signals (PGED/RA0, PGEC/RA1) directly to a 6-pin header or test pad for in-circuit programming and debugging. Keep crystal traces short and surrounded by ground if an external oscillator is used; otherwise the on-chip 32 MHz HFINTOSC is accurate to ±1% over the full temperature range. Add a 4.7 kΩ pull-up on MCLR if not driven by a debugger.
Do not exceed 3.6 V on VDD or the LF core will latch up; the F variant supports 5.5 V and is the only choice above 3.6 V. Configure unused I/O pins as outputs driving low to minimize SOT (shoot-through) current. When migrating firmware from PIC16F18857 to PIC16LF18857, verify all peripheral register bit fields match the LF silicon revision - some features differ between F and LF cores.
Información de cumplimiento
RoHS and REACH compliance per Microchip product page; E temperature grade -40°C to +125°C is suitable for non-safety automotive applications but not AEC-Q100 qualified. Lead-free matte-tin plating, reflow to 260°C per J-STD-020.
