PIC16LF18877-I/PT - 8-bit 32MHz 56KB Flash MCU | Microchip 44-TQFP
MPN： PIC16LF18877-I/PT ✓ 啟用中PIC16LF18877-I/PT 概覽
An 8-bit microcontroller (MCU) is a small, self-contained computer on a single IC that integrates a CPU, RAM, non-volatile program memory (Flash/ROM), EEPROM data memory, and a rich set of peripherals including timers, ADC, communication interfaces (EUSART, SPI, I2C), comparators, and PWM modules. The PIC16LF18877 belongs to the PIC16F1885X/7X family, which sits in the broader hierarchy: PIC16 -> PIC mid-range -> 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. XLP technology further places it in the low-power MCU category alongside competitors like TI MSP430 and ST STM8L.
Key features include 4KB RAM, 256 bytes of EEPROM, a 10-bit ADC with up to 35 channels, 1 channel of 5-bit DAC, Peripheral Pin Select (PPS) for flexible signal routing, hardware CRC/SCAN, Hardware Limit Timer (HLT), and Core Independent Peripherals (CIPs) that offload tasks from the CPU. Communication is handled by EUSART, MSSP (SPI/I2C) and the device supports up to 36 I/O pins in this 44-pin package.
Architecturally, the PIC16LF18877 uses Microchip's enhanced mid-range 8-bit core with a 14-bit instruction word and a 2-stage pipeline, executing most instructions in one clock cycle. The 32 MHz internal oscillator with 4x PLL delivers 8 MIPS, while the integrated temperature indicator, zero-cross detect, and windowed watchdog provide robust system supervision. The on-chip voltage regulator and nanoWatt XLP modes (sleep currents in the nA range) make it suitable for battery-powered designs.
Typical applications include IoT sensor nodes, wearable health devices, low-power remote controls, battery-powered industrial sensors, home automation controllers, and consumer appliances. The wide 1.8V-3.6V range and on-board peripherals like the 10-bit ADC, comparators, and PWM modules reduce external component count.
When designing with this part, leverage the Peripheral Pin Select (PPS) to remap digital peripherals to any I/O pin, simplifying PCB layout. Always enable the Windowed Watchdog Timer (WWDT) in safety-critical applications, and verify ADC acquisition time against source impedance for accurate conversions.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC16F1885X/7X family, and practical design notes not found in the standalone manufacturer datasheet. All data is sourced from Microchip product pages, DigiKey, Mouser, Octopart, and LCSC.
直接替換替代品，適用於 PIC16LF18877-I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16LF18877-I/PT （相同外形與佔位） — 差異在於 ADC, Operating Temperature, Package, DAC, Comparators.
PIC16LF18876-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16F18877-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF18877-I/PT-VAO
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16LF18877-I/PTREL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16LF18877T-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F18876-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF18877-I/PT 最大額定值與電氣特性
| Core Architecture | PIC16 Enhanced Mid-Range 8-bit |
| Program Memory (Flash) | 56 KB (32K x 14 words) |
| RAM | 4 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| 工作溫度 | -40C to +85C (Industrial, "-I" grade) |
| 封裝 | 44-pin TQFP (10x10 mm) |
| I/O Pins | 36 |
| ADC | 10-bit, up to 35 channels |
| DAC | 5-bit, 1 channel |
| Communication | EUSART, MSSP (SPI/I2C) |
| Peripheral Pin Select (PPS) | Yes |
| Timers | Multiple 8/16-bit with HLT |
| PWM Channels | Yes (10-bit) |
| Watchdog | Windowed WDT with on-chip LDO |
| Core Independent Peripherals | CLC, NCO, CRC/SCAN, HLT, ZCD |
| Low-Power Technology | XLP (eXtreme Low Power), nanoWatt |
| Internal Oscillator | 32 MHz with 4x PLL |
| RoHS 狀態 | Compliant |
PIC16LF18877-I/PT 腳位配置
| 腳位 1 | MCLR/RA3 — Master Clear (reset, active low) or digital I/O RA3 |
| 腳位 2 | RA4 — Digital I/O RA4 |
| 腳位 3 | RA5 — Digital I/O RA5 |
| 腳位 4 | RA6 — Digital I/O RA6 |
| 腳位 5 | RA7 — Digital I/O RA7 |
| 腳位 6 | RC0 — Digital I/O RC0 |
| 腳位 7 | RC1 — Digital I/O RC1 |
| 腳位 8 | RC2 — Digital I/O RC2 |
| 腳位 9 | RC3 — Digital I/O RC3 |
| 腳位 10 | RC4 — Digital I/O RC4 |
| 腳位 11 | VDD — Positive supply voltage |
| 腳位 12 | VSS — Ground reference |
| 腳位 13 | RC5 — Digital I/O RC5 |
| 腳位 14 | RC6 — Digital I/O RC6 |
| 腳位 15 | RC7 — Digital I/O RC7 |
| 腳位 16 | RB0 — Digital I/O RB0 / interrupt-on-change |
| 腳位 17 | RB1 — Digital I/O RB1 / interrupt-on-change |
| 腳位 18 | RB2 — Digital I/O RB2 / interrupt-on-change |
| 腳位 19 | RB3 — Digital I/O RB3 / interrupt-on-change |
| 腳位 20 | RB4 — Digital I/O RB4 / interrupt-on-change |
| 腳位 21 | RB5 — Digital I/O RB5 / interrupt-on-change |
| 腳位 22 | RB6 — Digital I/O RB6 / ICSPCLK |
| 腳位 23 | RB7 — Digital I/O RB7 / ICSPDAT |
| 腳位 24 | RD0 — Digital I/O RD0 |
| 腳位 25 | RD1 — Digital I/O RD1 |
| 腳位 26 | RD2 — Digital I/O RD2 |
| 腳位 27 | RD3 — Digital I/O RD3 |
| 腳位 28 | RD4 — Digital I/O RD4 |
| 腳位 29 | RD5 — Digital I/O RD5 |
| 腳位 30 | RD6 — Digital I/O RD6 |
| 腳位 31 | VSS — Ground reference |
| 腳位 32 | VDD — Positive supply voltage |
| 腳位 33 | RD7 — Digital I/O RD7 |
| 腳位 34 | RE0 — Digital I/O RE0 |
| 腳位 35 | RE1 — Digital I/O RE1 |
| 腳位 36 | RE2 — Digital I/O RE2 |
| 腳位 37 | RA0 — Digital I/O RA0 |
| 腳位 38 | RA1 — Digital I/O RA1 |
| 腳位 39 | RA2 — Digital I/O RA2 |
| 腳位 40 | OSC1/RA3 — Crystal input or digital I/O RA3 |
| 腳位 41 | OSC2/RA4 — Crystal output or digital I/O RA4 |
| 腳位 42 | RC0 — Digital I/O RC0 |
| 腳位 43 | RC1 — Digital I/O RC1 |
| 腳位 44 | RC2 — Digital I/O RC2 |
典型應用
PIC16LF18877-I/PT 適用於 6 應用s: IoT Wireless Sensor Node, Wearable Fitness / Health Band, Industrial Sensor / 4-20 mA Transmitter, Home Automation / Smart Lighting Controller, Battery-Powered Remote Control / Toy, Automotive Body / Convenience Module.
IoT Wireless Sensor Node
The PIC16LF18877-I/PT is a strong fit for battery-powered IoT sensor nodes due to its 1.8-3.6 V supply range, nanoWatt XLP sleep modes (sub-uA), 35-channel 10-bit ADC and integrated EUSART/SPI/I2C for connecting radios. With 56 KB Flash and 4 KB RAM, the MCU can host a wireless protocol stack or Modbus firmware without an external memory IC. PPS lets the developer route UART or SPI to any spare pin for a clean two-layer PCB. Compared with running an STM8L at the same current budget, the PIC16LF18877 offers a more flexible CIP (CLC, NCO) set for sensor signal conditioning and a 5-bit DAC for trimming.
推薦
Wearable Fitness / Health Band
Wearable health devices demand extremely low sleep current, tight analog performance, and a small PCB footprint - all of which the PIC16LF18877-I/PT delivers. The 1.8 V minimum VDD allows direct connection to a single Li-ion cell without a boost regulator, and the 10-bit ADC with 35 channels can read battery voltage, skin-temperature thermistor, and a 3-axis accelerometer simultaneously. The 5-bit DAC provides LED brightness control. Hardware Limit Timer and ZCD simplify optical heart-rate sensor signal conditioning, while 36 I/O in the 44-TQFP support a TFT display plus touch controller.
推薦
Industrial Sensor / 4-20 mA Transmitter
The PIC16LF18877-I/PT is widely used in industrial 4-20 mA loop-powered transmitters, where its 1.8 V minimum operation and low Iq XLP modes allow the loop to supply the MCU with no separate regulator. Its 10-bit ADC reads bridge, RTD, or thermocouple signals at the loop's 12-24 V compliance. CRC/SCAN peripheral provides memory integrity for safety-critical IEC 61508 SIL-2 designs, while the Windowed WDT supervises firmware execution. The 44-TQFP (10x10 mm) sits comfortably in a DIN-rail transmitter housing with screw terminals and an HART modem if needed.
推薦
Home Automation / Smart Lighting Controller
In smart-home controllers, the PIC16LF18877-I/PT handles PWM dimming, AC zero-cross detection, and wireless bridges. Its 10-bit PWM module plus 5-bit DAC deliver smooth LED dimming curves, and the ZCD (zero-cross detect) CIP implements triac-fired AC dimming without CPU intervention. EUSART drives a Bluetooth or Sub-GHz module for app control. PPS lets engineers re-route I2C to the wireless module without respinning the PCB, and 56 KB Flash accommodates Zigbee 3.0 or BLE-Mesh stacks in compact nodes.
推薦
Battery-Powered Remote Control / Toy
Cost-sensitive battery-powered products such as TV remotes, garage-door openers, and consumer toys benefit from the PIC16LF18877-I/PT's tiny standby current and integrated peripherals. The XLP sleep mode reduces quiescent current below 100 nA, allowing 2x AAA cells to last several years in intermittent duty. CLC (Configurable Logic Cell) and NCO (Numerically Controlled Oscillator) CIPs implement IR modulation and tone generation entirely in hardware, freeing the CPU from real-time interrupt load. 44-TQFP provides ample GPIO for key-scan matrices and an OLED display.
推薦
Automotive Body / Convenience Module
Within automotive body-electronics (window lift, mirror control, seat module), the PIC16LF18877 family provides the LIN-bus interface, PWM-driven motor control, and integrated watchdog needed for an ECU. The LF variant supports cold-crank scenarios down to 1.8 V, while the -Q automotive grade (PIC16F18877-I/PT-VAO) targets AEC-Q100 requirements. PPS simplifies PCB routing across long, dense automotive harnesses, and the CRC/SCAN peripheral adds functional-safety features without a larger MCU. The 44-TQFP is robust for under-dash mounting.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16LF18877-I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16LF18876-I/PT | PIC16F18877-I/PT | PIC16F18876-I/PT | PIC16LF18877T-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT, 10x10 mm) | 44-pin TQFP (PT, 10x10 mm) - same | 44-pin TQFP (PT, 10x10 mm) - same | 44-pin TQFP (PT, 10x10 mm) - same | 44-pin TQFP (PT, 10x10 mm) - same |
| Program Memory (Flash) | 56 KB (32K x 14) | 28 KB (16K x 14) - 50% less | 56 KB - identical | 28 KB - 50% less | 56 KB - identical |
| Supply Voltage (VDD) | 1.8 V to 3.6 V | 1.8 V to 3.6 V - identical | 2.3 V to 5.5 V - higher minimum | 2.3 V to 5.5 V - higher minimum | 1.8 V to 3.6 V - identical |
| Maximum CPU Speed | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS - identical | 32 MHz / 8 MIPS - identical | 32 MHz / 8 MIPS - identical | 32 MHz / 8 MIPS - identical |
| RAM | 4 KB | 2 KB - 50% less | 4 KB - identical | 2 KB - 50% less | 4 KB - identical |
| EEPROM | 256 bytes | 256 bytes - identical | 256 bytes - identical | 256 bytes - identical | 256 bytes - identical |
| ADC | 10-bit, 35 channels | 10-bit, 35 channels - identical | 10-bit, 35 channels - identical | 10-bit, 35 channels - identical | 10-bit, 35 channels - identical |
| DAC | 5-bit, 1 channel | 5-bit, 1 channel - identical | 5-bit, 1 channel - identical | 5-bit, 1 channel - identical | 5-bit, 1 channel - identical |
| Low-Power Technology | XLP, nanoWatt | XLP, nanoWatt - identical | XLP - similar, slightly higher Iq | XLP - similar, slightly higher Iq | XLP, nanoWatt - identical |
主要差異化特點
- Lowest minimum VDD in family (1.8 V vs 2.3 V) (對比PIC16F18877-I/PT)
- Doubled Flash (56 KB vs 28 KB) (對比PIC16LF18876-I/PT)
- Industrial (-40 to +85 C) versus extended temperature grade (對比PIC16LF18877-E/PT)
設計說明
PIC16LF18877-I/PT operates from 1.8 V to 3.6 V on VDD. Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair (pins 11/12 and 31/32). For battery applications use Sleep mode with peripherals disabled; the LF nanoWatt XLP variants achieve <1 uA standby. Enable the on-chip voltage regulator only when VDD > 2.0 V; below 2.0 V the regulator is bypassed and current draw drops further. Use the Low-Power Sleep modes selectively, waking on WDT or IOC interrupts to maximize battery life.
At 32 MHz with all peripherals active, the PIC16LF18877-I/PT draws roughly 8 mA at 3.3 V (~26 mW), well within the 44-TQFP thermal envelope (theta_JA around 50 C/W typical). Worst-case industrial junction at +85C ambient is +85C + 1.3C rise = +86.3C, far below the +150C absolute maximum. Even at +125C extended grade (PIC16F18877-I/PT-E grade) the thermal margin remains acceptable. No external heatsink is required for normal operation.
The 44-TQFP (10x10 mm) has a 0.8 mm pitch and requires 4-layer PCB for noise-sensitive analog (ADC >10-bit) designs. Route the analog AVSS/AVDD traces away from switching traces, and provide a single-point ground connection between AVSS and digital VSS. Keep the 32 kHz crystal traces short and surrounded by ground pour if you use an external low-frequency crystal. The PPS peripheral allows digital I/O remapping, so place UART and SPI signals next to connectors before locking pin assignments in firmware.
Estimated: VDD brown-out. If your system uses 2x AA batteries that drop below 1.8 V before replacement, the LF variant will simply stop operating without warning - configure the BOR (Brown-Out Reset) to 1.9 V to generate a clean reset and save context. Never leave the MCLR pin floating: tie it to VDD through a 10 kohm resistor and a 100 nF capacitor, otherwise spurious resets will occur in noisy environments. The ICSP pins RB6/RB7 are also general I/O; if your firmware reassigns them, ensure the programmer tool is reconfigured before next debug session.
合規資訊
RoHS and REACH compliance per Microchip product page. The -I grade is industrial (-40 to +85 C); AEC-Q100 qualification requires the -Q automotive variant (e.g. PIC16F18877-I/PT-VAO).