August 11, 2025
In recent years, RISC-V, as an open Instruction Set Architecture (ISA), has been rapidly emerging and widely adopted in IoT, embedded systems, AIoT, edge computing, and high-performance computing. However, regardless of how advanced the processor architecture is, it relies on one essential component — the Crystal Oscillator. Providing a stable and precise clock signal, it acts as the "heartbeat" of the RISC-V platform.
Role of Crystal Oscillators in RISC-V Systems
System Clock Source
The main operating frequency of a RISC-V processor is typically generated by a Phase-Locked Loop (PLL), with its reference signal provided by a crystal oscillator.
Peripheral & Communication Clocking
High-speed interfaces such as USB, Ethernet, SPI, and UART require precise clocks to ensure stable data transmission.
Low-Power & Real-Time Clock
Low-power RISC-V chips often use a 32.768 kHz crystal oscillator as the RTC time source, enabling timekeeping in standby mode.
High-Speed Synchronization
RISC-V SoCs with high-speed interfaces such as PCIe, MIPI, and SDIO require high-frequency crystal oscillators (e.g., 100 MHz, 125 MHz) for data link synchronization.
Typical Application Scenarios
Application Field
Oscillator Specification
Description
System Clock
24–50 MHz,SMD5032 / SMD3225
Drive CPU & main bus
USB / Ethernet
25 MHz, 50 MHz,SMD3225 / SMD2520
Accurate communication clock
RTC
32.768 kHz,SMD2016 / Cylinder
Standby timekeeping
(PCIe/SerDes)
100–156.25 MHz,SMD7050
High-speed data sync
JGHC Crystal Oscillator Recommendations for RISC-V
Application
Recommended Model
Package
Frequency
Stability
System Clock
OSC-JGHCO53
SMD5032
24–50 MHz
±10 ppm
USB / Ethernet
OSC-JGHCO32
SMD3225
25 MHz, 50 MHz
±20 ppm
RTC
Xtal-JGHCH21
SMD2016
32.768 kHz
±20 ppm
PCIe / SerDes
OSC-JGHCO75
SMD7050
125 MHz
±15 ppm
As RISC-V architecture continues to expand in embedded and AI applications worldwide, the demand for high-precision, low-power, and highly reliable crystal oscillators is increasing. JGHC is committed to providing diversified crystal oscillator solutions for RISC-V developers and enterprises worldwide — from ultra-low-power MCUs to high-performance AI SoCs — ensuring every clock pulse is precise and reliable.
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