PIC16F18857-I/SP - 8-Bit 32MHz 56KB Flash XLP MCU | Microchip
料号： PIC16F18857-I/SP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.38 | $238.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.89 | $1,890.00 |
PIC16F18857-I/SP 概述
An 8-bit microcontroller is a small computing processor built around an 8-bit data bus, widely used in embedded systems for sensor interfacing, control logic, and human-machine interface tasks. Within the semiconductor taxonomy, it sits under microcontroller -> microprocessor -> integrated circuit, and within Microchip's portfolio it belongs to the PIC16 mid-range family, recognized for deterministic performance and a mature toolchain (MPLAB X IDE, XC8 compiler).
Key features include CRC/SCAN hardware Cyclic Redundancy Check, Hardware Limit Timer (HLT), peripheral pin select (PPS), and rich analog integration including a 10-bit ADC with computation, multiple timers, and PWM outputs. The XLP technology delivers nanoWatt deep-sleep currents, making the PIC16F18857-I/SP suited to battery-powered and energy-harvesting designs that must wake, process, and return to sleep efficiently.
Typical applications include industrial sensor conditioning, IoT edge nodes, consumer appliance control, automotive body electronics (non-safety), instrumentation, and any low-power general-purpose MCU design that benefits from CIP for offloading tasks from the CPU. The CIP blocks run autonomously once configured, reducing code size and active-mode power.
When designing with this part, ensure the ICSP (In-Circuit Serial Programming) pins are accessible for production programming and debug. PPS must be remapped before use; default pin functions are not necessarily optimal for every application, so consult the I/O mapping chapter of the datasheet before finalizing PCB layout.
直接替换替代料： PIC16F18857-I/SP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16F18857-I/SP （相同外形与封装尺寸） ——差异在于 ADC, Package, MSL Level, Program Memory (Flash), Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC16F18855-I/SP
✅ 直接替换📋 参考替代料（不在目录中）
PIC16F18856-I/SP
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.48 / 个
查看数据手册 →PIC16F18877-I/SP
✅ 直接替换📋 参考替代料（不在目录中）
PIC16F18854-I/SP
✅ 直接替换✓ 有现货
$1.35 / 个
查看数据手册 →PIC16F18455-I/SP
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.62 / 个
查看数据手册 →PIC16F18456-I/SP
✅ 直接替换✓ 有现货
$1.07 / 个
查看数据手册 →PIC16F18857-I/SP 最大额定值与电气特性
| Family | PIC® XLP™ 16F |
| Core | 8-bit PIC16 |
| Functional Safety | FuSa capable |
| Program Memory Size | 56 KB (32K x 14 words) Flash |
| RAM Size | 4 KB |
| EEPROM Size | 256 B |
| CPU Frequency (max) | 32 MHz |
| 封装 | 28-SPDIP (SP) |
| 引脚数量 | 28 |
| 安装类型 | Through-Hole |
| 工作温度 | -40C to +85C (Industrial, -I) |
| ADC | 10-bit |
| Core Independent Peripherals | Yes (CRC/SCAN, HLT) |
| Communication | UART, SPI, I2C |
| RoHS 状态 | Compliant |
| MSL 等级 | 1 (unlimited) |
PIC16F18857-I/SP 引脚配置
| 引脚 1 | RA3/AN3/Vref+/CMP1+ — GPIO RA3 / ADC input / Vref+ |
| 引脚 2 | RA2/AN2/CMP1- — GPIO RA2 / ADC input / comparator |
| 引脚 3 | RA1/ICSPCLK — GPIO RA1 / ICSP clock |
| 引脚 4 | RA0/ICSPDAT — GPIO RA0 / ICSP data |
| 引脚 5 | RA7/OSC1/CLKIN — GPIO RA7 / oscillator input |
| 引脚 6 | RA6/OSC2/CLKOUT — GPIO RA6 / oscillator output |
| 引脚 7 | VDD — Power supply |
| 引脚 8 | VSS — Ground |
| 引脚 9 | RB7/ICSPDAT — GPIO RB7 / ICSP data |
| 引脚 10 | RB6/ICSPCLK — GPIO RB6 / ICSP clock |
| 引脚 11 | RB5 — GPIO RB5 |
| 引脚 12 | RB4 — GPIO RB4 |
| 引脚 13 | RB3 — GPIO RB3 |
| 引脚 14 | RB2 — GPIO RB2 |
| 引脚 15 | RB1 — GPIO RB1 |
| 引脚 16 | RB0 — GPIO RB0 |
| 引脚 17 | RC7 — GPIO RC7 |
| 引脚 18 | RC6 — GPIO RC6 |
| 引脚 19 | RC5 — GPIO RC5 |
| 引脚 20 | RC4 — GPIO RC4 |
| 引脚 21 | RC3 — GPIO RC3 |
| 引脚 22 | RC2 — GPIO RC2 |
| 引脚 23 | RC1 — GPIO RC1 |
| 引脚 24 | RC0 — GPIO RC0 |
| 引脚 25 | RE3/MCLR/Vpp — GPIO RE3 / master clear / programming voltage |
| 引脚 26 | RA5 — GPIO RA5 |
| 引脚 27 | RA4 — GPIO RA4 |
| 引脚 28 | VSS — Ground |
典型应用
PIC16F18857-I/SP 适用于 6 应用s: Industrial Sensor Conditioning and Control, IoT Edge Nodes and Smart-Sensor Hubs, Consumer Appliance Front Panels, Automotive Body Electronics (Non-Safety), Battery-Operated Handheld Instrumentation, Low-Power Energy Harvesting Controllers.
Industrial Sensor Conditioning and Control
The PIC16F18857-I/SP is well-suited to industrial sensor conditioning because of its 10-bit ADC with computation and Core Independent Peripherals that offload timing-critical tasks from the CPU. Its 32 MHz execution and 56 KB Flash handle filtering, calibration and PID logic on-board. Hardware Limit Timer and CRC/SCAN provide deterministic timing and memory integrity checks for control loops. XLP sleep modes allow battery-backed or line-powered sensor nodes to idle in nanoWatt sleep between measurement bursts.
推荐
IoT Edge Nodes and Smart-Sensor Hubs
The PIC16F18857-I/SP fits IoT edge roles because XLP nanoWatt sleep currents keep idle current low while the 32 MHz CPU and CIP blocks handle sensor fusion and protocol framing on wake. The part offers UART/SPI/I2C for radio or Wi-Fi module interfacing, ample 56 KB Flash for local intelligence, and 4 KB RAM for buffering telemetry packets. PPS (Peripheral Pin Select) allows flexible PCB routing of digital interfaces without re-spinning hardware.
推荐
Consumer Appliance Front Panels
The PIC16F18857-I/SP drives consumer appliance user interfaces where the 28-SPDIP package simplifies hand-rework and field service. PWM outputs control LED indicators, buzzers and small DC loads; the 10-bit ADC reads potentiometers or thermistors; Core Independent Peripherals generate exact timing for triac firing and zero-cross detection. With XLP sleep, standby current on powered-off units drops to nanoAmp levels, helping appliances meet energy regulations.
推荐
Automotive Body Electronics (Non-Safety)
The PIC16F18857-I/SP supports non-safety automotive body modules like interior lighting, mirror adjustment, seat controllers and HVAC controls, where its industrial temperature rating and ample peripheral set cover typical 12V vehicle loads. The functional-safety-capable silicon plus CRC/SCAN provide diagnostic hooks for OEMs implementing non-safety monitoring. Always pair with proper load drivers and TVS protection for automotive robustness.
推荐
Battery-Operated Handheld Instrumentation
The PIC16F18857-I/SP powers handheld instruments such as multimeters, data loggers and field sensors thanks to its XLP nanoWatt sleep modes and 32 MHz processing for ADC post-processing. The 28-SPDIP through-hole package withstands mechanical stress and is easy to hand-replace in field repair scenarios. CRC/SCAN detects firmware corruption or memory faults that could otherwise compromise measurement integrity.
推荐
Low-Power Energy Harvesting Controllers
The PIC16F18857-I/SP is ideal for energy-harvesting controllers managing vibration, thermal or solar micro-energy sources. XLP technology enables sub-microA sleep, and the part's fast wake-up allows it to harvest, process and return to deep sleep efficiently. Its 4 KB RAM and 56 KB Flash buffer sampled data before uplink; Core Independent Peripherals execute measurement loops while the CPU remains off.
推荐
推荐产品汇总
工程参考数据： PIC16F18857-I/SP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16F18855-I/SP | PIC16F18856-I/SP | PIC16F18877-I/SP | PIC16F18854-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Flash Size | 56 KB | 32 KB | 32 KB | 56 KB | 32 KB |
| RAM Size | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB |
| CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Core Independent Peripherals | Yes (CRC/SCAN, HLT) | Yes (CRC/SCAN, HLT) | Yes (CRC/SCAN, HLT) | Yes (CRC/SCAN, HLT) | Yes (reduced set) |
关键差异点
- Largest Flash in family within 28-SPDIP footprint （对比 PIC16F18855-I/SP)
- Hardware Limit Timer and CRC/SCAN CIPs （对比 PIC16F18455-I/SP)
- Through-hole 28-SPDIP ease of development （对比 PIC16F18857-I/SS)
设计说明
The PIC16F18857-I/SP supports multiple XLP sleep modes that deliver nanoWatt quiescent current. Estimate (with no datasheet figure to confirm exactly) that sleep current for full RAM retention and WDT disabled is significantly lower than active current; engineers targeting deep-sleep battery life should disable all unused peripherals in firmware and configure unused pins as low-level outputs to minimize parasitic drain. Always place a 100 nF decoupling capacitor within 5 mm of VDD.
Place the ICSP programming header (or test pads) on the production board for firmware updates and field service, because the 28-SPDIP through-hole package of PIC16F18857-I/SP makes rework trivial. Per Microchip guidelines, an in-line resistor on MCLR is acceptable when the resistor is small enough to allow Vpp (programming voltage) to rise above Vih during programming. Decoupling must be tightest to the part; bulk capacitance typically comes from the regulator output.
When migrating from older PIC16 designs, the Peripheral Pin Select (PPS) registers on PIC16F18857-I/SP must be unlocked and remapped at startup or peripheral functions will not appear at their original pins. Configuration bits must also be set correctly for oscillator mode, watchdog, code protection, and brown-out reset; failure to set brown-out reset can cause silent corruption during power-up. Always consult configuration-word settings in the datasheet, not the older family reference manuals.
For long PCB traces driving high-speed SPI or I2C buses from the PIC16F18857-I/SP, use series resistors near the driver pins and verify rise times against the load's setup requirements. Estimated: at 32 MHz CPU with peripherals driven from Fosc/4 (~8 MHz), traces above 50 mm may need damping. For high-noise industrial environments, place the part inside a guard ring tied to ground on the bottom layer to improve ADC accuracy.
合规信息
RoHS compliant per Microchip product page; REACH, AEC-Q100, halogen-free, and conflict-minerals certifications are not confirmed in the verified web data and should be verified with Microchip documentation.
