Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Package | LQFP-64(7×7) |
| Supply voltage | 3.3V;5V |
| CPU Core | RISC-V4C |
| Maximum CPU speed | 48MHz |
| Program memory | 62KB |
| Operating Temperature | -40℃~+85℃ |
| Number of I/O | 60 |
Product Overview
CH643Q is a WCH microcontroller identified by the exact orderable code CH643Q. Its confirmed technical identity includes Supply voltage 3.3V;5V, CPU Core RISC-V4C, Maximum CPU speed 48MHz, Program memory 62KB.
The exact device is described as: RISC-V4C 32 Bit 48MHz LQFP-64(7×7) Microcontrollers. Selection should be based on the exact package and the operating conditions required by the design, rather than on a nearby family member or a generic part number.
Technical Specifications
| Parameter | Value |
|---|---|
| Package | LQFP-64(7×7) |
| Supply voltage | 3.3V;5V |
| CPU Core | RISC-V4C |
| Maximum CPU speed | 48MHz |
| Program memory | 62KB |
| Operating Temperature | -40℃~+85℃ |
| Number of I/O | 60 |
| ADC (Bit) | 12bit |
| Program Memory Type | FLASH |
| Core Size | 32 Bit |
| Oscillator Type | Built-in |
Exact-Part Selection Insight
The exact CH643Q orderable code ties 62KB program memory to the LQFP-64(7×7) implementation and 60 listed I/O. Moving to a nearby family member can change memory capacity or pin availability, so the firmware memory map and PCB pinout should be checked together rather than treating the family name as interchangeable.
Selection Notes
- Package: LQFP-64(7×7)
- Supply voltage: 3.3V;5V
- CPU Core: RISC-V4C
- Maximum CPU speed: 48MHz
- Program memory: 62KB
Application Fit
This exact part is appropriate for designs that require a microcontroller with the confirmed package and electrical/function parameters above. Final fit depends on the surrounding circuit, interface, thermal and mechanical requirements of the target design.
Design Considerations
Confirm the available supply rail stays inside the stated operating range, including startup and transient conditions.
Confirm memory size, available I/O, clocking and required peripheral set for the exact orderable device before freezing firmware and PCB pinout.
Use the exact LQFP-64(7×7) footprint/package definition when checking PCB land pattern, assembly clearance and sourcing equivalence.
Related Engineering Resources
- Datasheet — verified HKEQGOO-hosted technical document for this exact product identity.
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
