ISL12057/8/9 RTCs Aid Design Of Utility E-Meters

Intersil has introduced three tiny razor-thin real-time clock (RTC) products that are ideal for low-voltage and portable applications. Intersil's ISL12057/8/9 devices simplify the design of utility E-Meters, multi-function printers, digital photo frames and many other devices. The smallest of these breakthrough products, the ISL12057 and ISL12058, require just 2 x 2mm, a 73 per cent reduction in board space against their closest competitors.

At only 0.55mm thick, these eight-lead devices are 45 per cent thinner than similar products on the market. The ISL12057 is available in a 2 x 2mm eight-lead uTDFN plastic package, which offers enhanced ruggedness and durability in portable applications. For added design versatility, the devices are also available in a 3 x 3mm eight-lead TDFN and popular MSOP and SOIC package choices. In addition, the ISL12058 offers package choices in the 2 x 2mm uTDFN, 3 x 3mm TDFN, eight-lead MSOP and eight-lead SOIC options.

The ISL12059 is available in the industry-standard SOIC package. With operation from 1.4 to 3.6V, these RTCs are ideally suited for battery-powered portable applications such as remote utility meters, copy/fax/scanner/printers, digital photo albums and hundreds of other applications. The real-time clock and calendar use an external 32.768kHz crystal that tracks time by date, year, month, week, hour, minute or second. Multiple selectable alarms allow a flexibility of alarm choices, with outputs for beepers or lights.

The calendar is accurate through 2099, with automatic leap-year correction. The two-wire I2C interface in the ISL12057/8/9 is widely used around the world, which simplifies design-in and enhances ease of manufacturability. The ISL12057/8/9 range of products is Pb-free (RoHS-compliant), pin, and software-compatible with legacy devices for easy design-in.

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