DAPU Telecom’s self-developed INS5A8900 Real Time Clock (RTC) ICs are claimed to be the world’s smallest and are provided in a 3.2 x 2.5 x 1.0 mm SMD package. With a built-in 32.768 kHz crystal and accuracies of ±3.4 ppm at -40°C to +85°C, (±5 ppm at up to +105°C), INS5A8900 exhibits high stability and retains its accuracy in a wide operating temperature range using a high-precision temperature compensation algorithm. Depending on where you read it, this device has a current consumption of 1.0-1.2 µA, with support for backup power.
The INS5A8900 offers I2C interface communication, supports calendar (year, month, week, day, hour, minute, second, 1/16 second) with automatic leap year adjustment, backup battery, automatic power switch , wake-up interrupt, timer, frequency output and other functions. DAPU recommends this product for use in various in-vehicle instruments, including taxi meters, driving recorders, T-BOX, and any other design where RTC capabilities are required.
Given some language barriers to finding information, we are assuming that these ICs are suitable for sample-based evaluation rather than a fully fledged board. If you’re interested in any of DAPU’s other RTC ICs – there are solutions for anti-shock applications, higher accuracy, or even lower power, down to 0.8 µA – we’ll be happy to put you in touch with them using this form.