PIC16LF18857T-I/SO - 8-bit XLP MCU, 56KB Flash, 28-SOIC | Microchip
Référence : PIC16LF18857T-I/SO ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.83 | $2,83 |
| 10 | $2.55 | $25,50 |
| 100 | $2.21 | $221,00 |
| 500 | $1.95 | $975,00 |
| 1 000 | $1.74 | $1 740,00 |
PIC16LF18857T-I/SO Présentation
A PIC® microcontroller is a RISC-based 8-bit MCU built around the PIC16 instruction set, used widely for sensor interfacing, motor control, and small-form-factor consumer/industrial products. PIC16F/LF188xx parts sit one tier below the PIC18 family and target designs that need more analog and digital peripherals than a PIC10/12/16F1xxx device but less MIPS than a dsPIC or PIC32. Within Microchip's catalog, the PIC16LF1885x/7x series is positioned as the mainstream Low Pin Count (LPC) controller with a rich mix of CIP (Core Independent Peripherals).
Key features include 56KB (32K × 14 words) self-programmable Flash, 4KB RAM, 256-byte EEPROM, a 10-bit ADC with Computation, two 10-bit DACs, two comparators, a complementary waveform generator with 4 outputs (CWG), multiple PWMs (CCP, ECCP), a hardware RTCC, an EUSART, two MSSP (SPI/I2C) modules, and 25 GPIOs. The device also integrates Peripheral Pin Select (PPS) so peripherals can be remapped to nearly any I/O. A 32MHz internal oscillator reduces external component count.
Architecturally, the PIC16LF18857T-I/SO leverages an enhanced mid-range core with a 14-bit instruction word, a 31-level hardware stack, and interrupt-driven control with atomic CIP operations that let the MCU react to analog and timing events without waking the CPU. DSM, CLC, NCO, and Configurable Logic Cell peripherals assist in real-time signal conditioning.
Typical applications include IoT edge nodes (LoRa/Zigbee host MCUs), battery-powered sensor hubs, low-power instrumentation with on-screen feedback, appliance control (white goods, coffee machines), USB/HID bridges when paired with an external transceiver, automotive interior lighting and body controllers (AEC-Q100 variants available separately), and small medical wearables. Trade-offs: 8-bit core limits floating-point math, so heavy DSP work should move to a dsPIC33 or PIC32.
Design tip: place a 100nF decoupling capacitor within 5mm of each VDD pin and add a bulk 10µF + 1µF pair near the IC. Always configure the unused I/O pins as digital low-output to minimize quiescent current, and use the nMCLR pin with a 10kΩ pull-up plus a 100nF cap to ground for clean reset behavior. This page synthesizes datasheet highlights, current distributor pricing, drop-in Microchip variants, and practical design notes not collated in one place by the manufacturer.
Alternatives de remplacement direct pour PIC16LF18857T-I/SO — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16LF18857T-I/SO (même facteur de forme et même empreinte) — différant par Operating Temperature, Package, Program Memory (Flash), ADC, Core Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16LF18857-I/SO
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.95 / unité
Voir la fiche technique →PIC16F18857T-I/SO
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC16LF18857-E/SO
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$1.49 / unité
Voir la fiche technique →PIC16LF18855T-I/SO
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC16LF18877-I/SP
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC16LF18857T-I/SO Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC16 Enhanced Mid-Range 8-bit |
| Family | PIC16LF188xx (XLP) |
| Program Memory (Flash) | 56 KB (32K x 14 words) |
| Data SRAM | 4 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 25 (with PPS) |
| Comparators | 2 |
| DAC | 2 x 10-bit |
| PWM | Multiple (CCP/ECC/CWG) - 4 CWG outputs |
| Comms | 1 x EUSART, 2 x MSSP (SPI/I2C) |
| Boîtier | 28-pin SOIC (7.5 mm body) |
| Température de fonctionnement | -40 °C to +85 °C (industrial, "I") |
| Peripheral Pin Select (PPS) | Yes |
| RoHS | Compliant |
Configuration des broches de PIC16LF18857T-I/SO
| Broche 1 | RA0/RE3 — General I/O, 5V tolerant analog |
| Broche 2 | RA1 — General I/O, analog input |
| Broche 3 | RA2 — General I/O, analog input |
| Broche 4 | MCLR/VPP/RA3 — Reset / programming voltage |
| Broche 5 | RA4 — General I/O (open-drain) |
| Broche 6 | RA5 — General I/O |
| Broche 7 | RA6 — OSC2 / General I/O |
| Broche 8 | RA7 — OSC1 / General I/O |
| Broche 9 | VSS — Ground |
| Broche 10 | RB0 — Interrupt-on-change / analog |
| Broche 11 | RB1 — Interrupt-on-change / analog |
| Broche 12 | RB2 — Interrupt-on-change |
| Broche 13 | RB3 — Interrupt-on-change |
| Broche 14 | VDD — Positive supply (1.8-3.6 V) |
| Broche 15 | RB4 — Interrupt-on-change (PPS) |
| Broche 16 | RB5 — Interrupt-on-change / analog |
| Broche 17 | RB6 — ICS Clock / Interrupt-on-change |
| Broche 18 | RB7 — ICS Data / Interrupt-on-change |
| Broche 19 | RC0 — General I/O |
| Broche 20 | RC1 — General I/O |
| Broche 21 | RC2 — General I/O |
| Broche 22 | RC3 — General I/O |
| Broche 23 | RC4 — General I/O / SDA1 (MSSP) |
| Broche 24 | RC5 — General I/O / SCL1 (MSSP) |
| Broche 25 | RC6 — General I/O / EUSART TX |
| Broche 26 | RC7 — General I/O / EUSART RX |
| Broche 27 | RE0 — General I/O |
| Broche 28 | RE1 — General I/O |
Applications typiques
PIC16LF18857T-I/SO convient pour 6 applications: Battery-Powered IoT Sensor Node, Home Appliance Control Board, Handheld Medical Wearable, USB-to-UART / HID Bridge, Industrial Sensor Hub with Local Display, Automotive Interior Lighting and Body Controller.
Battery-Powered IoT Sensor Node
The PIC16LF18857T-I/SO drives battery-powered IoT sensor nodes where low current consumption is non-negotiable. The XLP "LF" revision consumes <1 µA in deep sleep with the RTCC and interrupt-on-change still alive, allowing coin-cell operation for multi-year lifetimes. Its built-in 10-bit ADC with computation block filters noisy sensor readings without waking the CPU, while an external SPI-controlled LoRa or Zigbee transceiver gets the data to the gateway. The wide 1.8-3.6 V VDD range fits directly off two alkaline AAs or a 3 V Li-MnO2 primary cell, eliminating a step-up regulator and saving BOM cost. Engineers prefer this MCU because CIP peripherals like CLC and DSM react to analog thresholds autonomously, so the core can stay asleep for minutes at a time.
Recommandé
Home Appliance Control Board
The PIC16LF18857T-I/SO finds a home in white-goods control boards such as coffee makers, dishwashers, and washing machines. Its 56 KB Flash holds user-interface state machines and sensor-fusion firmware, while the 4 KB RAM supports multi-tasking between motor, valve, and display interrupts. The Complementary Waveform Generator (CWG) drives triac gate pulses for AC loads, with built-in dead-band control. Mid-range PIC16 8-bit cores are well established for appliance reliability, and the 28-SOIC footprint is hand-solderable, easing rework in service channels. The industrial -40 °C to +85 °C grade handles vibration, humidity, and supply transients inside kitchen cabinets.
Recommandé
Handheld Medical Wearable
The PIC16LF18857T-I/SO is well suited to handheld medical wearables such as pulse oximeters and pill dispensers. The 1.8 V minimum operation lets designers run directly off a single Li-ion cell during discharge, and the PIC16LF18857T's EUSART plus two MSSP peripherals expose enough serial buses for PPG sensors, an OLED display, and an EEPROM health log. The on-chip 10-bit DAC calibrates the LED drive current for accurate SpO2 measurements, while the hardware RTCC schedules pill-reminder routines with no CPU wake needed. XLP technology keeps the BOM small by removing external RTC and voltage supervisor chips.
Recommandé
USB-to-UART / HID Bridge
The PIC16LF18857T-I/SO is a low-cost USB CDC/HID bridge for legacy serial peripherals. Adding a USB3320 or MCP2200 companion turns the device into a USB-to-UART converter while keeping the PIC core free for protocol translation. With 32 MHz CPU, 56 KB Flash, and a generous 4 KB RAM, designers can embed vendor-specific command sets over EUSART or SPI without external memory. The Peripheral Pin Select lets the same PCB firmware be reused across multiple connectors (DB9, RJ45, RJ-50). This is a common Microchip pattern in industrial handhelds and point-of-sale accessories.
Recommandé
Industrial Sensor Hub with Local Display
The PIC16LF18857T-I/SO drives industrial sensor hubs that must display values locally while still publishing over a fieldbus. The 25 GPIO lines and PPS redistribute can drive up to two I2C-display LCDs plus SPI or I2C sensor expansions. The dual 10-bit DACs can re-inject calibration voltages, and the on-chip comparators provide zero-cross detection for AC line monitoring. The industrial temperature grade is sufficient for factory-floor cabinets and unconditioned enclosures. Compared with a 32-bit MCU, the PIC16 architecture consumes noticeably less idle current and is easier to certify under IEC 61000-4 EMC immunity for industrial control equipment.
Recommandé
Automotive Interior Lighting and Body Controller
The PIC16LF18857T-I/SO (industrial grade) runs ambient lighting, HVAC fan control, and rear-mirror mirrors in non-safety automotive nodes. The CWG and ECCP modules generate up to 4 complementary PWM pairs to fade RGB LED strings smoothly, while the comparators handle current-sense feedback for short-circuit protection. Designers can reuse firmware across trim levels because Peripheral Pin Select remaps I/O at runtime. For full AEC-Q100 qualification, Microchip supplies the PIC16F18857-E/SO automotive sibling with identical die, ensuring the same code base across consumer and auto SKUs.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16LF18857T-I/SO — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16LF18857-I/SO | PIC16F18857T-I/SO | PIC16LF18857-E/SO | PIC16LF18855T-I/SO |
|---|---|---|---|---|---|
| Package | SOIC-28 (7.5 mm) | SOIC-28 (7.5 mm) - same | SOIC-28 (7.5 mm) - same | SOIC-28 (7.5 mm) - same | SOIC-28 (7.5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 56 KB | 56 KB | 56 KB | 56 KB | 14 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 1 KB |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Temperature Range | -40 to +85 °C (I) | -40 to +85 °C | -40 to +85 °C | -40 to +125 °C | -40 to +85 °C |
| AEC-Q100 | No | No | No | No | No |
Principaux différenciateurs
- 1.8 V minimum VDD for single-cell battery operation (vs PIC16F18857T-I/SO)
- Larger Flash and RAM for firmware complexity (vs PIC16LF18855T-I/SO)
- Integrated CIP peripherals reduce external BOM (vs PIC16F18855-I/SO)
Notes de conception
Place a 100 nF decoupling capacitor within 5 mm of every VDD/VDDCORE pin pair, and add a bulk 10 µF + 1 µF cap close to the IC. Because the PIC16LF18857T-I/SO has PIC16-only internal LDO requirements, run the recommended 1.8-3.6 V rail through a low-ripple source such as a TPS7A02 or MCP1700 LDO. Use a digital I/O with 1 µA of hysteresis to wake the MCU from deep sleep via interrupt-on-change; this is the lowest-cost wake path.
Route a 4-layer board with one dedicated ground plane below the MCU; the 28-SOIC benefits from a continuous GND pour to lift the thermal dissipation for 32 MHz operation. Keep high-frequency signals (PWM, EUSART) away from the analog VDD/VSS pair. The Peripheral Pin Select lets you reassign peripherals at firmware level, so layout swaps late in the project no longer require board re-spins.
Do not float the MCLR pin; tie it through a 10 kΩ pull-up to VDD and add a 100 nF cap (or schottky) for clean reset behavior. Unused I/O pins must be configured as digital low-output to minimize Iq. When debugging, hold the device in RESET to share the ICSP pins, then release MCLR for normal operation. Estimate: typical active current at 32 MHz / 3.3 V ≈ 7 mA, idle ≈ 2 mA, deep-sleep < 1 µA.
Informations de conformité
Microchip confirms RoHS and REACH compliance through their material declaration portal. The -I industrial grade is not AEC-Q100 qualified; use PIC16F18857T-E/SO or PIC16LF18857-E/SO for AEC-Q100 automotive deployments.
