CH32V305RBT6
WCH · CH32V305 Series
In production
32 bit · RV32IMAFC
Low-power data
Max clock
144MHz
SRAM
32KB
On-chip Flash
128KB
Active current
85µA/MHz
Sleep current
—
Supply voltage
2.4–3.6V
Overview
CH32V305RBT6 is a WCH-bit RISC-V MCU from 32, built on the WCH in-house QingKe V4F core (RV32IMAFC), with a maximum clock of 144 MHz, 32 KB of on-chip SRAM, and 128 KB KB of Flash. Typical active power is about 85 µA/MHz.
Core and memory
| Vendor | WCH（Chinese mainland） |
|---|---|
| IP brand / origin | WCH in-house（Chinese mainland） |
| Core | QingKe V4F |
| ISA / bit width | RV32IMAFC · 32 bit |
| Max clock | 144 MHz |
| SRAM | 32 KB |
| On-chip Flash | 128 KB |
Power and electrical
Active current
85 µA/MHz
Sleep current
—
Standby / shutdown
1 µA
Conditions and notes: The vendor or source notes are in Chinese in the original 同 V303/305/307/317 电气表: VDD=3.3V, 25°C, HSI 144MHz 外设全关 12.2mA → 85µA/MHz（全开 22.1mA）; Standby 1.0µA
| Supply voltage | 2.4–3.6 V |
|---|---|
| Operating temperature | -40 ℃ ~ 85 ℃ |
Peripherals and interfaces
| UART / USART | 5 way |
|---|---|
| SPI | 3 way |
| I²C | 2 way |
| CAN / CAN FD | 2 way |
| USB Full-Speed | 1 way |
| USB High-Speed | 1 way |
| I²S | 2 way |
| SDIO | 1 way |
| Op-amp | 4 way |
| Comparator | 4 way |
| Touch | 16 way |
| DMA | 36 way |
| ADC | 16 channels · 12 bit |
| DAC | 2 channels |
| Other | The vendor or source notes are in Chinese in the original USB2.0 HS 480Mbps 内置 PHY + USB FS（支持 OTG）；2 组 ADC/2 组 DAC/4 组 OPA；SDIO |
Sources and notes
Confidence:High (official datasheet) · Last verified 2026-11-04
The vendor or source notes are in Chinese in the original FB=TSSOP20（ADC 仅 1 通道、OPA 无）、GB=QFN28（ADC 6 通道、OPA3）、CC=LQFP48/256K/64K。无以太网。