南京沁恒微电子股份有限公司成立于2004年，是一家通讯接口芯片和全栈MCU芯片公司。
沁恒专注于连接技术和MCU内核研究，基于自研收发器PHY和处理器IP的全栈研发模式，取代传统的外购IP整合模式，提供以太网、蓝牙无线、USB和PCI类等接口芯片，及集成上述接口的连接型/互联型/无线型全栈MCU+单片机。
技术上涉及“感知+控制+连接+云聚”：ADC/PGA等模拟检测、MCU智能控制及驱动算法、HID人机交互、Ethernet/Bluetooth-LE等网络通信、UART/USB/USB PD/PCIE/CAN/SerDes等接口通讯、数据安全、物联协议和云端服务，致力于为客户提供万物互联、上下互通的芯片及解决方案。
产品主品牌：WCH，全称WinChipHead
产品定位：专业，易用。
应用领域：计算机周边、手机周边、工业控制、物联网等。
| CH340E | 1000000 | WCH/沁恒 | 18+ | MSOP-10 |
| CH9350L | 75210 | WCH/沁恒 | 21+ | LQFP-48 |
| CH9341F | 4845 | WCH/沁恒 | 20+ | QFN |
| CH9329 | 61835 | WCH/沁恒 | 2022+ | SOP |
| CH9328 | 10000 | WCH/沁恒 | 19+ | SOP16 |
| CH9326 | 50000 | WCH/沁恒 | 22+ | SOP16 |
| CH9141 | 28380 | WCH/沁恒 | 20+ | QFN28 |
| CH9121 | 30000 | WCH/沁恒 | 21+ | LQFP64 |
| CH9120 | 3000 | WCH/沁恒 | 21+ | QFN28 |
| ch9102x | 4900 | WCH/沁恒 | 21+ | QFN |
| CH579M | 5000 | WCH/沁恒 | 21+ | QFN48 |
| CH573F | 50000 | WCH/沁恒 | 22+ | QFN28 |
| CH571K | 7583 | WCH/沁恒 | 22+ | ESSOP10 |
| CH571F | 7900 | WCH/沁恒 | 21+ | QFN28 |
| CH559T | 28850 | WCH/沁恒 | 2021+ | SSOP20 |
| CH559L | 50000 | WCH/沁恒 | 21+ | LQFP48 |
| CH554T | 65000 | WCH/沁恒 | 21+ | TSSOP-20 |
| CH554P | 3000 | WCH/沁恒 | 22+ | QFN |
| CH554G | 9950 | WCH/沁恒 | 21+ | SOP-16 |
| CH554E | 6829 | WCH/沁恒 | 22+ | MSOP10 |
| CH552T | 29678 | WCH/沁恒 | 21+ | TSSOP20 |
| CH552G | 12400 | WCH/沁恒 | 18+ | SOP16 |
| CH551G | 20000 | WCH/沁恒 | 1822+ | SOP16 |
| CH483M | 53000 | WCH/沁恒 | 2021 | QFN42 |
| CH455K | 29552 | WCH/沁恒 | 1220+ | DIP18 |
| CH455H | 75210 | WCH/沁恒 | 22+ | SOP-18 |
| CH455G | 52050 | WCH/沁恒 | 22+ | SOP16 |
| CH454S | 5091 | WCH/沁恒 | 18+ | SOP28 |
| CH453S | 30000 | WCH/沁恒 | 17+ | SOP28 |
| CH452A | 100000 | WCH/沁恒 | 21+ | |
| CH451S | 6000 | WCH/沁恒 | SOP28 | |
| CH451L | 5350 | WCH/沁恒 | 22+ | DIP24 |
| CH446Q | 3000 | WCH/沁恒 | 21+ | LQFP44 |
| CH444G | 8941 | WCH/沁恒 | 13+ | SOP |
| CH443K | 496308 | WCH/沁恒 | 2212+ | SC70-6L |
| CH442E | 7500 | WCH/沁恒 | 2020 | MSOP-10 |
| CH440G | 38477 | WCH/沁恒 | 22+ | SOP-16 |
| CH440E | 4178 | WCH/沁恒 | 1903+ | MSOP10 |
| CH438Q | 10000 | WCH/沁恒 | 20+ | LQFP44 |
| CH423S | 45000 | WCH/沁恒 | 22+ | SOP28 |
| CH412Z | 3000 | WCH/沁恒 | 18+ | SOT353 |
| CH410K | 9000 | WCH/沁恒 | 21+ | SOT23-6 |
| CH395Q | 10000 | WCH/沁恒 | 21+ | LQFP64M |
| CH395L | 325456 | WCH/沁恒 | 2022+ | LQFP128 |
| CH382L | 8000 | WCH/沁恒 | 21+ | LQFP64 |
| CH378Q | 28850 | WCH/沁恒 | 2021+ | QFP64 |
| CH378L | 95000 | WCH/沁恒 | 2021+ | QFP128 |
| CH376T | 12356 | WCH/沁恒 | 2020+ | SSOP20 |
| CH376S | 15000 | WCH/沁恒 | 19+ | SOP-8 |
| CH375B | 46000 | WCH/沁恒 | 22+ | SOP28 |
| CH374U | 151200 | WCH/沁恒 | 19+ | SSOP |
| CH374T | 10000 | WCH/沁恒 | 21+ | SSOP28 |
| CH374S | 18900 | WCH/沁恒 | 2020 | SOP |
| CH374 | 600000 | WCH/沁恒 | 20+ | SSOP20 |
| CH372B | 5800 | WCH/沁恒 | 14+ | SSOP20 |
| CH370T | 6650 | WCH/沁恒 | 20+ | SSOP20 |
| CH367L | 6500 | WCH/沁恒 | 21+ | LQPF64 |
| CH365P | 5000 | WCH/沁恒 | 2021 | SSOP20 |
| CH351Q | 15250 | WCH/沁恒 | 20+ | LQFP64 |
| CH348Q | 6583 | WCH/沁恒 | 22+ | QFP48 |
| CH343P | 60000 | WCH/沁恒 | 21 | QFN16 |
| CH341T | 51390 | WCH/沁恒 | 21+ | SSOP20 |
| CH341A | 10000 | WCH/沁恒 | 21+ | SOP28 |
| CH340T | 20700 | WCH/沁恒 | 21+ | SSOP20 |
| CH340N | 866800 | WCH/沁恒 | 21+22+ | SOP-8 |
| CH340K | 10000 | WCH/沁恒 | 20+ | ESSOP10 |
| CH340C | 10000 | WCH/沁恒 | 2121+ | SOP-16 |
| CH340G | 950000 | WCH/沁恒 | 2020+ | SOP16 |
| CH340B | 16506 | WCH/沁恒 | 21+ | SOP-16 |
| CH32V103C8T6 | 20000 | WCH/沁恒 | 21+ | LQFP48 |
| CH32F203RCT6 | 2000 | WCH/沁恒 | 22+ | LQFP-64 |
| CH32F203CBT6 | 2500 | WCH/沁恒 | 22+ | |
| CH32F203C8T6 | 30000 | WCH/沁恒 | 22+ | LQFP-48 |
| CH32F103R8T6 | 68500 | WCH/沁恒 | 21+ | LQFP64 |
| CH32F103C8T6 | 45000 | WCH/沁恒 | 22+ | LQFP48 |
| CH226S | 1000000 | WCH/沁恒 | 22 | ESOP-10 |
| CH224SA | 30000 | WCH/沁恒 | 20+ | ESSOP10 |
| CH224K | 80000 | WCH/沁恒 | 21+ | ESSOP10 |
