SJK: High-precision oscillators & filters for global tech industries.
sjk@q-crystal.com+86 755 8835 2869
RTC Modules
SJK high-performance RTC (Real-Time Clock) modules deliver continuous, reliable timekeeping for industrial, automotive, IoT and low-power embedded systems, maintaining accurate timestamps even when main power is cut off.
Our portfolio covers standard low-power, high-precision temperature-compensated, AEC-Q200 automotive-grade and ultra-compact SMD variants. The 3V operating current can be as low as 45nA, supporting multi-year battery-powered standby, with ±1ppm 25℃ accuracy for under 0.09s daily drift, and a -40℃ to +125℃ wide temperature range for harsh environments.
All SJK RTC modules integrate a built-in 32.768kHz tuning fork crystal, eliminating extra calibration components. They support I²C/SPI interfaces, with packages ranging from 2.0×1.2mm micro SMD to mainstream 3.2×1.5mm sizes, fully compatible with common PCB layouts.
These modules are ideal for industrial equipment timestamp logging, IoT terminal NTP synchronization, wearable low-power wake-up and smart meter time management. They feature optimized EMI resistance for industrial noise immunity, and an automatic backup power switch circuit that needs no manual configuration.
Compared with MCU-integrated RTCs, SJK standalone models avoid timing drift from main control downtime, extending system service life by over 50%. All products support free sample applications, with downloadable PDF datasheets and dedicated technical selection support.
Send your inquiry
Compact mini package (3.2×2.5×1.55mm), ultra-small size to save PCB space for compact electronic designs
Seam sealed SMD2016 package with dimension of 2.0×1.6×0.7mm, compact structure suitable for automotive PCB layout
SJK high-performance RTC (Real-Time Clock) modules deliver continuous, reliable timekeeping for industrial, automotive, IoT and low-power embedded systems, maintaining accurate timestamps even when main power is cut off.
Our portfolio covers standard low-power, high-precision temperature-compensated, AEC-Q200 automotive-grade and ultra-compact SMD variants. The 3V operating current can be as low as 45nA, supporting multi-year battery-powered standby, with ±1ppm 25℃ accuracy for under 0.09s daily drift, and a -40℃ to +125℃ wide temperature range for harsh environments.
All SJK RTC modules integrate a built-in 32.768kHz tuning fork crystal, eliminating extra calibration components. They support I²C/SPI interfaces, with packages ranging from 2.0×1.2mm micro SMD to mainstream 3.2×1.5mm sizes, fully compatible with common PCB layouts.
These modules are ideal for industrial equipment timestamp logging, IoT terminal NTP synchronization, wearable low-power wake-up and smart meter time management. They feature optimized EMI resistance for industrial noise immunity, and an automatic backup power switch circuit that needs no manual configuration.
Compared with MCU-integrated RTCs, SJK standalone models avoid timing drift from main control downtime, extending system service life by over 50%. All products support free sample applications, with downloadable PDF datasheets and dedicated technical selection support.
Founded in 1989, SJK specializes in the manufacturing of crystal resonators and oscillators. With extensive experience in miniaturization, high precision, and low power consumption, our components are widely used across multiple industries.
Useful Links
Contact Us
Tel: +86 755 8835 2869
Email: sjk@q-crystal.com
Add: 12/F, Building 3C, TianAn Cloud Park Phase 1, Bantian, Longgang District, Shenzhen, 518129, China