PIC16LC771-I/SO - 8-Bit MCU, 7KB OTP, 20MHz, SOIC-20 | Microchip
MPN： PIC16LC771-I/SO ✓ 啟用中PIC16LC771-I/SO 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and programmable I/O peripherals onto one die. Within the broader power IC / power management hierarchy, an MCU like the PIC16LC771 sits alongside voltage regulators and supervisors as part of an embedded system. The PIC16 line uses a Harvard-architecture RISC core with a small, deterministic instruction set, which simplifies firmware development and yields predictable interrupt latency for real-time control tasks.
Key features of the PIC16LC771 include 7 KB (4K x 14) of OTP program memory for permanent firmware storage, 256 bytes of data RAM for variable storage, integrated ADC, PWM, USART, and timers, 16 general-purpose I/O pins, and an integrated analog comparator. The device supports in-circuit serial programming (ICSP) through two dedicated pins, allowing firmware to be loaded after PCB assembly. Its low-power CMOS design enables nanoWatt-style sleep modes suitable for battery-powered products.
Architecturally, the PIC16LC771 uses Microchip's mid-range 14-bit instruction RISC core with a hardware stack and interrupt controller, supported by a small instruction cache and direct register-mapped peripherals. This design delivers strong deterministic real-time performance for control loops, sensor sampling, and human-interface applications at modest clock rates.
Typical applications include industrial sensor conditioning, low-power consumer products, battery management controllers, automotive body and accessory modules, and white-goods / appliance control panels. The wide-body SOIC footprint and dual supply range also make it convenient as a 3.3 V or 5 V system controller for mixed-voltage designs.
When designing with this part, verify that OTP memory is appropriate for the production volume; for high-volume runs, prefer the flash-based PIC16F877A / PIC16F887 family which is pin-to-pin compatible with this SOIC-20 footprint. Always place 0.1 µF decoupling close to VDD and use the ICSP header for in-circuit firmware updates during development.
直接替換替代品，適用於 PIC16LC771-I/SO — 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： PIC16LC771-I/SO （相同外形與佔位） — 差異在於 Package, Program Memory Size, ADC, Operating Temperature, RAM Size.
PIC16LC771-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC717-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC770-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC771T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC716T-04I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC711-04I/SO
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16LC771-I/SO 最大額定值與電氣特性
| Core Architecture | PIC16 8-bit RISC (Harvard, 14-bit instruction word) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Data RAM | 256 bytes |
| Maximum CPU Clock | 20 MHz |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| I/O Pins | 16 |
| 封裝 | 20-pin SOIC (wide body, 300 mil) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40 °C to +85 °C (Industrial) |
| Temperature Grade | Industrial (I) |
| MSL 等級 | 1 (unlimited floor life) |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| Peripherals | ADC, PWM, USART, Timers, Comparator (per device datasheet) |
| I/O Banks | 1 (single bank, 16 GPIO) |
PIC16LC771-I/SO 腳位配置
| 腳位 1 | RA2/AN2 — GPIO RA2 / analog input AN2 |
| 腳位 2 | RA3/AN3 — GPIO RA3 / analog input AN3 |
| 腳位 3 | RA4/T0CKI — GPIO RA4 / Timer0 clock input |
| 腳位 4 | RA5/AN4 — GPIO RA5 / analog input AN4 |
| 腳位 5 | VSS — Ground reference |
| 腳位 6 | OSC1/CLKIN — Oscillator input / external clock input |
| 腳位 7 | OSC2/CLKOUT — Oscillator output / clock output |
| 腳位 8 | RB0/INT — GPIO RB0 / external interrupt |
| 腳位 9 | RB1 — GPIO RB1 |
| 腳位 10 | RB2 — GPIO RB2 |
| 腳位 11 | RB3 — GPIO RB3 |
| 腳位 12 | RB4 — GPIO RB4 |
| 腳位 13 | RB5 — GPIO RB5 |
| 腳位 14 | RB6/PGC — GPIO RB6 / ICSP clock |
| 腳位 15 | RB7/PGD — GPIO RB7 / ICSP data |
| 腳位 16 | RC0 — GPIO RC0 |
| 腳位 17 | RC1 — GPIO RC1 |
| 腳位 18 | RC2 — GPIO RC2 |
| 腳位 19 | RC3 — GPIO RC3 |
| 腳位 20 | VDD — Positive supply (2.5 V to 5.5 V) |
典型應用
PIC16LC771-I/SO 適用於 6 應用s: Industrial Sensor Conditioning & Acquisition, Low-Power Battery-Powered Consumer Products, White Goods & Appliance Control Panels, Automotive Body & Accessory Modules, LED Lighting & Signage Controllers, HVAC & Environmental Control Boards.
Industrial Sensor Conditioning & Acquisition
The PIC16LC771-I/SO fits industrial sensor nodes because its 16 GPIO, integrated ADC, and 2.5 V to 5.5 V supply let it digitize 4-20 mA or 0-10 V transducer signals directly off a 24 V industrial rail that has been regulated to 5 V. The 20 MHz PIC16 RISC core provides 200 ns deterministic instruction cycles for tight control loops, while 256 bytes of RAM accommodates moving-average filtering of ADC samples. The -40 °C to +85 °C industrial temperature range supports factory-floor and unheated-cabinet installations. Unlike higher-Power Arduino-class boards, this part integrates ADC, timers, USART, and PWM on a single die, shrinking BOM and PCB area for cost-sensitive multi-sensor transmitter designs.
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Low-Power Battery-Powered Consumer Products
The PIC16LC771-I/SO is well-matched to battery-powered consumer devices because the 'LC' low-voltage CMOS process keeps quiescent current low and the 2.5 V minimum VDD allows direct operation from 2xAA alkaline or single-cell Li-ion without boost conversion. The mid-range 14-bit RISC core consumes minimal active current, and the 256-byte RAM is sufficient for state machines, button de-bounce, and small display buffers. Integrated PWM can drive buzzers, LEDs, or haptics directly from the GPIO. Compared with higher-power ARM Cortex-M0 alternatives, the PIC16LC771 has no flash controller overhead, making it ideal for ultra-low-cost disposable or seasonal products where OTP memory and minimal BOM cost dominate the design trade-off.
推薦
White Goods & Appliance Control Panels
The PIC16LC771-I/SO suits washing machines, dishwashers, and microwave control panels because its 20 MHz PIC16 RISC core drives segmented or character LCDs through multiplexing, while integrated timers generate beep tones and motor PWM signals for variable-speed pumps. The 7 KB OTP program memory accommodates full appliance state machines including fault logging and self-test routines. The wide-body SOIC-20 footprint simplifies hand-solder rework and supports high-volume SMT lines with standard 300 mil tooling. Unlike newer capacitive-touch controllers, this MCU delivers reliable electromechanical button handling and proven EMI immunity in noisy motor environments at a fraction of the cost of ARM-based platforms.
推薦
Automotive Body & Accessory Modules
The PIC16LC771-I/SO handles non-safety body modules such as interior lighting, mirror controllers, and seat heaters where its 16 GPIO drive LED drivers, MOSFET gates, and relay coils directly through PWM or discrete I/O. The 2.5 V to 5.5 V supply tolerance is compatible with regulated 12 V automotive rails, though the part is qualified for industrial -40 °C to +85 °C rather than AEC-Q100 automotive grade. The 20 MHz core and deterministic interrupts keep button-press latency under 5 ms for HMI feedback. For safety-critical automotive, AEC-Q100-qualified dsPIC or PIC18 variants are required; the LC771 is reserved for non-safety accessory nodes only.
推薦
LED Lighting & Signage Controllers
The PIC16LC771-I/SO drives RGB LED strips and channel-letter signage by generating multiple PWM channels from its integrated timer peripherals, while the 16 GPIO can scan up to 16 channels directly or expand via external drivers. The 20 MHz instruction rate supports 8-bit color resolution at refresh rates above 100 Hz, eliminating visible flicker. The wide 2.5 V to 5.5 V supply accepts either 3.3 V logic-level or 5 V LED-driver rails. With 7 KB OTP program memory, the firmware can store smooth color transitions, scheduling, and remote-control command decoding for DMX-512 or simple serial protocols without external EEPROM.
推薦
HVAC & Environmental Control Boards
The PIC16LC771-I/SO is appropriate for thermostats, fan controllers, and humidistats because its ADC reads temperature/humidity sensors, the PWM drives TRIAC gates or fan motors, and the USART interfaces to display modules or remote wall units. The -40 °C to +85 °C industrial range handles unheated attic and basement installations common in HVAC equipment rooms. The OTP memory suit is configured to volume production of stable, mature HVAC firmware that rarely changes, lowering overall BOM cost. Compared with 32-bit Cortex-M alternatives, this PIC16LC771 draws less quiescent current, helping thermostats meet Energy Star standby budgets of <1 mW.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16LC771-I/SO — 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 | PIC16LC717-I/SO | PIC16LC770-I/SO | PIC16LC771T-I/SO | PIC16LC716T-04I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-20 (wide body, 300 mil) | SOIC-20 (wide body, 300 mil) | SOIC-20 (wide body, 300 mil) | SOIC-20 (wide body, 300 mil) | SOIC-20 (wide body, 300 mil) |
| Program Memory | 7 KB (4K x 14) OTP | OTP, smaller than 7 KB | OTP, similar 7 KB range | 7 KB OTP (identical die) | OTP, smaller than 7 KB |
| Maximum CPU Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Temperature Grade | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) |
| Carrier Packaging | Tube | Tube | Tube | Tape and Reel | Tape and Reel |
主要差異化特點
- Wide-body SOIC-20 with 16 GPIO and full PIC16 mid-range peripheral set (對比PIC16LC770-I/SO)
- Industrial temperature grade with OTP memory and 7 KB program space (對比PIC16LC771/SO)
- Tube packaging optimized for prototyping and low-volume assembly (對比PIC16LC771T-I/SO)
設計說明
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 20) with a short, wide trace to the VSS pin (pin 5). For designs driving heavy GPIO currents or operating at 20 MHz, add a bulk 10 µF tantalum or ceramic capacitor on the same rail within 25 mm of the IC. This suppresses VDD droop during GPIO transitions and reduces EMI on adjacent analog channels during ADC conversions.
PIC16LC771 uses OTP (One-Time Programmable) EPROM for program memory - firmware can only be programmed ONCE per device. Do not use OTP for prototype builds because every firmware revision requires a new chip; choose the flash-based PIC16F877A or PIC16F887 for prototypes and reserve PIC16LC771 for production runs where OTP cost savings justify the lost rework flexibility.
Route the ICSP pins RB6 (PGC) and RB7 (PGD) directly to a 6-pin header with no series resistors, ensuring programming works in-circuit on populated boards. Keep the 20 MHz crystal or resonator traces to OSC1 and OSC2 short and symmetric, and guard them with a VSS trace to prevent noise coupling from switching GPIO. Analog inputs should be routed away from digital switching signals, with an AGND/VSS separation only if the design mixes precision analog with high-current digital drivers.
合規資訊
RoHS-compliant lead-free SOIC-20 package per Microchip product page. Industrial temperature grade -40 C to +85 C only; not AEC-Q100 qualified for automotive safety. Choose PIC18 or dsPIC AEC-Q100 variants for automotive safety.
