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Another World’s smallest: A low-power Real Time Clock IC with backup power support

On show at Electronica, DAPU Telecom’s self-developed Real Time Clock (RTC) ICs are claimed to be the world’s smallest, and with a built-in 32.768 kHz crystal and accuracies up to ±2 ppm, one can be sure that these devices are a great fit for many applications, including security monitoring, consumer electronics, networks, metering and smart homes, industrial automation, and appliances.

In this post, however, Mr. X will focus on their flagship automotive-grade products, which take redundancy and anti-shock characteristics into consideration as part of their design. INS5A8900 exhibits high stability and retains its accuracy in a wide operating temperature range using a high-precision temperature compensation algorithm. This enables accuracies of ±3.4 ppm at -40°C to +85°C, and ±5 ppm at up to +105°C. INS5A8900 comes in a minuscule 3.2 x 2.5 x 1.0 mm SMD package and, depending on where you read it, has a current consumption of just 1.0-1.2 µA, with support for backup power.

Offering I2C interface communication, support for calendar (year, month, week, day, hour, minute, second, 1/16 second) with automatic leap year adjustment, automatic power switch, wake-up interrupt, and more, 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.

Mr. X’s Simplified Chinese is a little rusty, but he knows a great product when he sees one, and thankfully he managed to acquire some English-language documentation so that we can share this new technology with you all. Given these 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.

Keep designing!

DAPU Telecom INS5A8900 Automotive Real Time Clock IC Sample

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