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WCH CH591D
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
15
specifications
Core information
- Product name
- WCH CH591D
- Type
- WCH
- Minimum package
- 5000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- WCH
- Electronic Component
- CH591D
- Electronic Component
- 1
- Package
- QFN-20(3x3)
- Electronic Component
- MCU(MCU / MPU / SOC)
- Electronic Component
- 0.176g
- Electronic Component
- 1
- Features
- Gate (IWDG); (BOR / LVD / LVR / LVI);; positions(POR); Gate positions; Built-in General Purpose; positions(NRST); positions; Integrated LDO; positions(PDR)
- Electronic Component
- BM0229463625
- Electronic Component
- Electronic Component
- Electronic Component
- 5000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
CH591D 产品概述
一、产品简介
CH591D 是南京沁恒（WCH）面向低功耗嵌入式应用设计的一款小封装微控制器系列成员，封装为 QFN-20（3×3 mm）。芯片集成多种可靠性与电源管理功能，适合空间受限且对系统稳态与掉电安全性有较高要求的终端设备。
二、主要功能特性
- 独立看门狗（IWDG），提供硬件级复位保护，防止软件失控。
- 多种欠压检测与复位机制（BOR / LVD / LVR / LVI），提升上电与掉电过程中的系统安全性。
- 日历（RTC）功能，支持长期时间计数与闹钟事件（可配合 32.768 kHz 晶振使用）。
- 上电复位（POR）与掉电复位（PDR），保证电源异常时系统能可靠回到已知状态。
- 看门狗复位、外部管脚复位（NRST）、软件复位等多路复位源，满足不同复位策略需求。
- 内置通用定时器，用于定时控制、PWM 或事件计数等实时任务。
- 集成低压差线性稳压（LDO），简化外部电源方案并节省 PCB 空间。
三、封装与引脚
- 封装：QFN-20（3×3 mm），适合便携与小型化产品。
- 常用引脚：VDD / VSS 电源、NRST 外部复位、RTC 时钟输入/输出引脚、若干 GPIO 与定时器复用功能引脚。建议在电源与地间并联适当的去耦电容，并为 NRST 提供上拉电阻与滤波元件以抑制毛刺。
四、应用场景
- 可穿戴设备、健康监测终端：小封装、低功耗与 RTC 支持，适合需长期计时与断电保护的装置。
- 物联网传感节点：集成看门狗与多重复位保证远端设备长期可靠运行。
- 工业控制与电表终端：欠压检测与掉电复位功能提高系统抗干扰与数据一致性。
- 智能家居与安防设备：定时唤醒与外部复位配合，实现可靠的事件驱动控制。
五、设计建议与注意事项
- 若使用 RTC 日历功能，建议外接 32.768 kHz 晶振并做好走线与去耦，确保时间计时精度。
- 对关键程序开启独立看门狗，并在异常处理路径中进行有意义的错误记录与安全复位。
- 欠压检测与 POR、PDR 配合使用，可在电源掉落或恢复时保护数据完整性与外设状态。
- 集成 LDO 可简化电源设计，但需评估热耗与负载能力，必要时在输入端加入滤波与保护措施。
CH591D 以其丰富的复位与电源管理特性、内建定时与日历能力以及紧凑封装，适合对可靠性与体积有较高要求的嵌入式应用。在系统设计阶段应结合具体电源与外设需求，合理配置复位策略与去耦方案，以发挥器件最佳性能。
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