PIC12LC672-04/SM - 8-Bit 4MHz OTP MCU, 3.5KB | Microchip
料号： PIC12LC672-04/SM ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.65 | $1,650.00 |
PIC12LC672-04/SM 概述
A microcontroller (MCU) is a single-chip computer containing a CPU, program memory, RAM, and peripherals. The PIC12C/12CE/12F family from Microchip Technology uses a Reduced Instruction Set Computer (RISC) Harvard architecture, which separates program and data memory paths to enable single-cycle instruction execution and deterministic interrupt response. The PIC12LC672 sits in the hierarchy: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor IC.
Key features include an operating voltage range of 2.5V to 5.5V, 33 single-word instructions, a Power-On Reset (POR) circuit, a Device Reset Timer (DRT), and a Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable recovery from firmware faults. The internal 4 MHz oscillator eliminates the need for external clock components, reducing BOM cost and PCB area. The 8-bit A/D converter provides four analog input channels with selectable reference voltages, enabling direct sensor interfacing without external ADC ICs.
The PIC12LC672 uses Microchip's mature OTP program memory architecture, which allows prototyping and low-volume production using inexpensive programming tools, while the LC variant indicates operation down to 2.5V for battery-powered applications. The integrated peripherals allow designers to replace multiple discrete components with a single MCU, simplifying BOM and improving reliability through reduced part count.
Typical applications include battery-powered sensor nodes, simple motor drivers, LED controllers, and embedded control subsystems in consumer and industrial products. The combination of low power, integrated ADC, and small 8-pin package makes it well-suited to cost-sensitive designs where board space is at a premium.
When designing with this part, use Microchip's MPLAB development environment for code generation and debugging. Ensure decoupling capacitors are placed close to VDD and that the MCLR pin is properly biased. The OTP memory is one-time programmable; once programmed, the code cannot be erased or rewritten.
This page synthesizes distributor pricing, drop-in alternatives from the PIC12C/12CE family, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing and substitution decisions.
直接替换替代料： PIC12LC672-04/SM ——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： PIC12LC672-04/SM （相同外形与封装尺寸） ——差异在于 Timers, Package, Program Memory Size, Operating Temperature, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC12C672-04/SM
✅ 直接替换✓ 有现货
$3.1 / 个
查看数据手册 →PIC12CE673-04/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.6 / 个
查看数据手册 →PIC12LC672-04I/SM
✅ 直接替换📋 参考替代料（不在目录中）
PIC12LC672T-04/SM
✅ 直接替换✓ 有现货
$2.2 / 个
查看数据手册 →PIC12LC672-04/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.92 / 个
查看数据手册 →PIC12LC672-04/SM 最大额定值与电气特性
| Core Architecture | 8-bit PIC RISC |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| Data RAM | 128 bytes |
| 最大时钟频率 | 4 MHz |
| Operating Voltage Range | 2.5 V to 5.5 V |
| Number of I/O Pins | 6 |
| ADC | 8-bit, 4 channels |
| Timers | TMR0 (8-bit with programmable prescaler) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Power-On Reset | Yes (POR) |
| Device Reset Timer | Yes (DRT) |
| 封装 | 8-SOIJ (208-mil SOIJ) |
| 安装类型 | Surface Mount |
| 工作温度 | 0 C to +70 C |
| Instruction Set | 33 single-word instructions |
| RoHS 状态 | Compliant |
PIC12LC672-04/SM 引脚配置
| 引脚 1 | GP5/OSC1/CLKIN — General-purpose I/O / oscillator input / external clock input |
| 引脚 2 | GP0/AN0 — General-purpose I/O / analog input channel 0 |
| 引脚 3 | GP1/AN1/VREF — General-purpose I/O / analog input channel 1 / ADC voltage reference |
| 引脚 4 | GP2/AN2/T0CKI — General-purpose I/O / analog input channel 2 / Timer0 clock input |
| 引脚 5 | GP3/MCLR/VPP — General-purpose input only / master clear reset / programming voltage |
| 引脚 6 | GP4/AN3/OSC2/CLKOUT — General-purpose I/O / analog input channel 3 / oscillator output / clock out |
| 引脚 7 | VSS — Ground reference |
| 引脚 8 | VDD — Positive supply voltage (2.5V to 5.5V) |
典型应用
PIC12LC672-04/SM 适用于 6 应用s: Battery-Powered Sensor Node, LED Lighting Controller, Simple Motor Driver Control, Consumer Remote Control / IR Transmitter, Industrial Control Subsystem, Smart Home Sensor Hub Edge Node.
Battery-Powered Sensor Node
The PIC12LC672-04/SM's 2.5V minimum operating voltage and integrated 8-bit ADC make it ideal for battery-powered sensor nodes monitoring temperature, humidity, or light. With 4 ADC channels, six I/O pins, and 3.5KB OTP memory, the part can sample multiple sensors, run basic filtering, and drive a low-power RF or wired transmitter. The LC variant's low-voltage operation extends battery life in 2xAA or coin-cell designs, while the SOIJ-8 package keeps board area under 30 mm squared.
推荐
LED Lighting Controller
For entry-level LED controllers and dimmers, the PIC12LC672-04/SM provides sufficient compute to drive PWM channels, read user inputs (buttons, potentiometers via ADC), and implement simple lighting effects. The 4 MHz clock and 33-instruction RISC core handle multi-channel PWM generation while the 128-byte RAM supports modest state machines. The wide 2.5V-5.5V supply range allows direct operation from rectified 5V or 3.3V LED driver rails.
推荐
Simple Motor Driver Control
In small brushed DC motor or solenoid driver designs, the PIC12LC672-04/SM can generate PWM control signals, monitor current via the ADC, and handle fault detection through the watchdog timer. Six I/O pins are sufficient for direction, PWM, enable, and a tachometer or current sense input. The integrated watchdog timer with dedicated RC oscillator provides fault recovery critical for motor control safety, ensuring the system resets cleanly if firmware hangs.
推荐
Consumer Remote Control / IR Transmitter
For low-cost IR remote controls and consumer wireless transmitters, the PIC12LC672-04/SM offers 3.5KB OTP memory for protocol stacks (RC5, NEC, SIRC) and 6 I/O for buttons and IR LED drive. The 4 MHz instruction rate generates accurate carrier frequencies (36-56 kHz typical), and the SOIJ-8 package enables ultra-thin remote form factors. The LC variant's low-voltage operation supports 2xAAA battery designs with extended life.
推荐
Industrial Control Subsystem
As a sub-processor or supervisory controller in industrial equipment, the PIC12LC672-04/SM handles status monitoring, button debouncing, and inter-IC communication. The integrated ADC reads panel voltages, the watchdog timer protects against firmware faults in noisy industrial environments, and the wide 2.5V-5.5V supply tolerance tolerates 24V-derived industrial rails after regulation. The 0-70C operating range suits cabinet-mounted commercial equipment.
推荐
Smart Home Sensor Hub Edge Node
For edge nodes in smart home or IoT sensor hubs, the PIC12LC672-04/SM provides local ADC sampling, simple threshold detection, and interrupt-driven wake-up behavior. Six I/O pins support a sensor, status LED, and a UART link to a host MCU or RF module. The LC variant's 2.5V minimum enables 2xAA battery operation with years of standby life, and the small 8-SOIJ package fits inside compact sensor enclosures for retrofit installations.
推荐
推荐产品汇总
工程参考数据： PIC12LC672-04/SM ——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 | PIC12C672-04/SM | PIC12LC672-04I/SM | PIC12LC672T-04/SM |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIJ | 8-SOIJ - same | 8-SOIJ - same | 8-SOIJ - same |
| Program Memory | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP | 3.5KB OTP |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Voltage Min | 2.5 V | 3.0 V | 2.5 V | 2.5 V |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C | 0 C to +70 C |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| ADC | 8-bit, 4-ch | 8-bit, 4-ch | 8-bit, 4-ch | 8-bit, 4-ch |
关键差异点
- Low-voltage 2.5V operation for battery designs （对比 PIC12C672-04/SM)
- Industrial temperature grade option available （对比 PIC12LC672-04/SM (standard))
- Integrated 4-channel ADC eliminates external converter （对比 PIC12F509)
设计说明
Estimated: at 4 MHz clock and 5V supply, the PIC12LC672-04/SM draws approximately 2 mA active current and 1 uA standby. For battery applications below 3V, the LC variant enables direct 2xAA operation without boost conversion. Place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a 10 uF bulk capacitor on the supply rail to handle inrush during ADC conversion.
The 8-SOIJ package requires careful PCB layout for the exposed padless SOIJ footprint. Ensure pad dimensions follow the Microchip SOIJ-8 land pattern specification, with pad pitch of 1.27 mm and pad width of approximately 0.6 mm. Keep traces to GP3/MCLR short to minimize noise coupling, and route ADC analog traces away from digital switching signals to preserve conversion accuracy.
The OTP memory is one-time programmable - once written, the program cannot be erased or rewritten. Engineers prototyping with this part should plan for OTP programming via MPLAB PM3 or compatible programmer before committing to PCB assembly. Verify the MCLR pin is not left floating; tie it to VDD through a 10 kohm resistor for normal operation or to the programmer for in-circuit serial programming.
合规信息
RoHS and lead-free per Microchip product page. Industrial temperature variants available with -04I suffix. Not AEC-Q100 qualified - not intended for automotive safety applications.
