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Real-time clock integrates EEPROM

Posted: 03 May 2006 ?? ?Print Version ?Bookmark and Share

Keywords:ISL12026? ISL12027? ISL12028? ISL12029? real-time clock?

Intersil Corp. introduced a new family of real-time clocks that integrate 4Kbits of EEPROM (2 million write cycles) and CPU supervisory functions, in a small footprint package designed for space-constrained applications.

Intersil's ISL12026/27/28/29 family features low power dissipation (800nA battery supply current) in battery back-up mode, enabling the use of small batteries or super caps for back-up, which is said to be key in handheld applications. The ISL12027, ISL12028 and ISL12029 also integrate CPU supervisory functions.

The clocks suit consumer applications such as DVD-R and HDTV devices, point-of-sale systems and other consumer electronics devices. Industrial applications include utility power meters, heating, air conditioning, ventilation and other industrial equipment. The devices can also be used in handheld applications such as PDAs, scanners, portable medical equipment and other handheld devices. Other applications include HVAC, power metering, security, fire monitoring and other security-related systems.

Features include: crystal frequency compensation; low power consumption in battery back-up mode; ISL12028 provides CMOS output; ISL12029 provides open drain output for interrupt request bar; and two million write cycles for EEPROM.

Intersil's new family of real-time clocks is currently available. The ISL12026 and ISL12027 are housed in eight-pin small outline and TSSOP packages. Prices for the ISL12026 start at $1.40 for SO and $1.45 for the TSSOP package; prices for the ISL12027 are $1.65 in SO and $1.70 for TSSOP package. The ISL12028 and ISL12029 are available in 14-pin SO and TSSOP packages, and are priced at $1.80 for SO and $1.85 for the TSSOP package. All prices are for 1,000-unit quantities. Evaluation boards are available beginning at $165 each.

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