PIC16LC770-I/SO - 8-bit MCU, 3.5KB OTP, 20MHz, 20-SOIC | Microchip
料号： PIC16LC770-I/SO ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.32 | $4.32 |
| 10 | $3.86 | $38.60 |
| 100 | $3.21 | $321.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.31 | $2,310.00 |
PIC16LC770-I/SO 概述
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and peripheral interfaces into a single IC. PIC microcontrollers belong to the microcontroller -> embedded controller -> semiconductor hierarchy, and they execute one instruction per instruction cycle (RISC architecture), giving them deterministic timing suitable for real-time control. The "LC" family designation indicates low-voltage CMOS operation optimized for lower power consumption than the standard "C" family.
Key features include a Harvard-architecture RISC CPU with 35 instructions, hardware USART for serial I/O, a 12-bit resolution A/D converter, capture/compare/PWM modules, and an internal watchdog timer for reliable autonomous operation. The wide 3.0V to 5.5V operating range simplifies power design in both battery-powered and line-powered embedded systems. The industrial-grade -40C to +85C operating temperature range makes the PIC16LC770-I/SO suitable for non-automotive industrial environments.
Typical applications include industrial control systems, sensor interface boards, low-power embedded controllers, simple motor control, LED display drivers, and battery-powered instrumentation. The 20 MHz clock rate and 14-bit instruction word give ample headroom for state-machine control, basic protocol handling (I2C/SPI/USART), and ADC-driven feedback loops without external logic.
When designing with this device, note that the OTP program memory cannot be re-programmed in-circuit - firmware or qualification must be committed during manufacturing. A Flash-based sibling (PIC16F770) is recommended for prototyping and field-upgradable designs. Decoupling capacitors (100nF + 10uF) should be placed close to VDD/VSS pins to ensure ADC accuracy and oscillator stability.
直接替换替代料： PIC16LC770-I/SO ——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： PIC16LC770-I/SO （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Program Memory Size, Program Memory Type, RAM Size.
快速对比工具——选择替代料号进行并排对比：
PIC16F770-I/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC16LC770-E/SO
✅ 直接替换✓ 有现货
$4.4 / 个
查看数据手册 →PIC16LC770T/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC16LC770/SO
✅ 直接替换✓ 有现货
$2.88 / 个
查看数据手册 →PIC16LC770-I/SO 最大额定值与电气特性
| Core | PIC RISC 8-bit |
| Program Memory Size | 3.5 KB (2K x 14) |
| Program Memory Type | OTP |
| RAM Size | 256 B |
| EEPROM Size | 0 B |
| 最大时钟频率 | 20 MHz |
| Instruction Set Width | 14-bit |
| Number of I/O Pins | 16 |
| 工作电源电压 | 3.0 V to 5.5 V |
| A/D Converter | 12-bit |
| 封装 | 20-SOIC (0.295 inch / 7.50 mm width) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C |
| Series | PIC16LC770 |
PIC16LC770-I/SO 引脚配置
| 引脚 1 | MCLR — Master Clear (reset) input, active low |
| 引脚 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| 引脚 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| 引脚 4 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| 引脚 5 | RA3/AN3 — Digital I/O / Analog input channel 3 |
| 引脚 6 | RA4 — Digital I/O |
| 引脚 7 | RA5/AN4 — Digital I/O / Analog input channel 4 |
| 引脚 8 | VSS — Ground reference |
| 引脚 9 | OSC1 — Oscillator input / external clock |
| 引脚 10 | OSC2 — Oscillator output |
| 引脚 11 | RC0 — Digital I/O |
| 引脚 12 | RC1 — Digital I/O |
| 引脚 13 | RC2 — Digital I/O |
| 引脚 14 | RC3 — Digital I/O |
| 引脚 15 | RC4 — Digital I/O |
| 引脚 16 | RC5 — Digital I/O |
| 引脚 17 | RC6 — Digital I/O |
| 引脚 18 | RC7 — Digital I/O |
| 引脚 19 | VSS — Ground reference |
| 引脚 20 | VDD — Positive supply voltage (3.0V to 5.5V) |
典型应用
PIC16LC770-I/SO 适用于 6 应用s: Industrial Sensor Interface Board, Battery-Powered Remote Monitoring, Simple Motor Control (DC/Fan/Stepper), LED Display and Sign Controller, Home Appliance Control Board, Automotive Aftermarket Accessories (Non-Safety).
Industrial Sensor Interface Board
The PIC16LC770-I/SO fits sensor interface boards where 16 digital I/O, 12-bit ADC resolution, and a USART peripheral provide direct connection to analog sensors (temperature, pressure, flow) and digital actuators. Operating from 3.0V to 5.5V and up to 20 MHz clock, the MCU handles ADC sampling, scaling, and serial reporting (RS-232/RS-485) within a single chip. The 3.5KB OTP memory stores the sensor calibration table and protocol stack, while the 256-byte RAM is adequate for buffering measurement frames. The -40C to +85C industrial temperature range ensures reliability in factory-floor environments.
推荐
Battery-Powered Remote Monitoring
For battery-powered remote monitoring nodes, the PIC16LC770-I/SO offers low-voltage CMOS operation (down to 3.0V), making it suitable for two-AA or lithium-cell powered designs. The 12-bit ADC monitors battery voltage and sensor inputs, while the 20 MHz instruction rate allows the MCU to wake, sample, transmit via USART, and return to sleep within tight energy budgets. The 16 I/O pins support multiple sensor interfaces and a low-battery LED indicator. OTP memory locks the firmware once deployed, preventing field tampering - a benefit in remote installations.
推荐
Simple Motor Control (DC/Fan/Stepper)
The PIC16LC770-I/SO suits low-cost brushed DC motor, fan, and unipolar stepper control applications. Its CCP (Capture/Compare/PWM) modules generate PWM signals for motor speed regulation, while the 12-bit ADC reads back current sense or tachometer feedback for closed-loop control. The 20 MHz instruction rate ensures PWM frequencies above audible range (>20 kHz), eliminating motor whine. Sixteen I/O pins accommodate direction logic, brake/enable signals, and fault inputs, all within the 20-SOIC package's compact footprint.
推荐
LED Display and Sign Controller
LED matrix and seven-segment display controllers benefit from the PIC16LC770-I/SO's 16 I/O pins, USART, and PWM outputs. The MCU scans rows and columns of LED matrices, drives multiplexed seven-segment digits, or produces dimming PWM for RGB lighting. The 3.5KB program memory holds lookup tables for character fonts and animation sequences, while the 256-byte RAM buffers display frames. Industrial temperature range supports outdoor signage and architectural lighting installations.
推荐
Home Appliance Control Board
Home appliance control boards (washing machines, dishwashers, small kitchen appliances) use the PIC16LC770-I/SO as the central microcontroller. It interfaces with user keypads, rotary encoders, segment displays, and relays through its 16 I/O pins. The 12-bit ADC reads water level, temperature, and motor current sensors, while the USART communicates with inverter modules or external diagnostic tools. OTP memory locks the production firmware, preventing unauthorized firmware modification in consumer products.
推荐
Automotive Aftermarket Accessories (Non-Safety)
Although not AEC-Q100 qualified, the PIC16LC770-I/SO can be used in non-safety automotive aftermarket accessories such as interior LED controllers, dashboard accessories, and infotainment peripherals operating from the vehicle's 12V bus (regulated down to 5V or 3.3V). The 16 I/O, 12-bit ADC, and USART support LIN-bus-like protocols, while the industrial -40C to +85C temperature range handles cabin-environment thermal stress. For under-hood or safety-critical applications, designers should select an AEC-Q100 qualified MCU instead.
推荐
推荐产品汇总
工程参考数据： PIC16LC770-I/SO ——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 | PIC16F770-I/SO | PIC16LC770-E/SO | PIC16LC770T/SO | PIC16LC770/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC |
| Program Memory | 3.5 KB OTP | 3.5 KB Flash | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | 0C to +70C (Commercial) |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Number of I/O | 16 | 16 | 16 | 16 | 16 |
| Lifecycle Status | Obsolete | Active | Obsolete | Obsolete | Obsolete |
关键差异点
- Industrial -40C to +85C temperature range （对比 PIC16LC770/SO)
- Flash memory with in-system programming （对比 PIC16LC770-I/SO (this part))
- Extended temperature option （对比 PIC16LC770-I/SO (this part))
设计说明
Decouple VDD with both a 100 nF (high-frequency) and 10 uF (bulk) ceramic capacitor placed as close to the VDD/VSS pins as possible - within 5 mm is recommended for ADC accuracy. The PIC16LC770-I/SO's 12-bit ADC draws brief inrush currents during sampling; insufficient decoupling degrades ADC linearity. A ferrite bead on the supply trace can further reduce digital switching noise coupling into analog inputs.
Remember that the PIC16LC770-I/SO uses OTP (One-Time Programmable) memory - firmware cannot be updated once written. For prototypes or field-upgradable designs, select the flash-based PIC16F770-I/SO instead, which is pin-compatible. Also note that the MCLR pin requires a proper reset circuit (typically 10 kohm pull-up to VDD); leaving MCLR floating causes erratic behavior.
Route the oscillator traces (OSC1/OSC2) short and symmetrically, keeping them away from switching signals and ADC analog inputs to avoid crosstalk. If using a crystal, place load capacitors within a few millimeters of OSC1/OSC2 and guard the traces with a ground pour. For ADC accuracy, separate analog (AN0-AN4) and digital traces, and consider a ground split if high-current switching is present.
The USART peripheral supports both synchronous and asynchronous modes. For RS-485 multi-drop networks, enable the internal weak pull-up on RX to prevent false start bits on an open bus. When driving long cables, add a 100 ohm series termination at the MCU TX pin to dampen ringing, especially at 20 MHz system clock where edge rates are in the 5-10 ns range.
合规信息
Compliance information not provided in the verified web data. The PIC16LC770-I/SO is not AEC-Q100 qualified; for automotive applications use a qualified MCU. RoHS/lead-free status should be confirmed with the manufacturer before placement in RoHS-restricted designs.
