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NEW PRODUCT NEWS—edited by Harv Weiner

Y2K- AND ACPI-COMPLIANT REAL-TIME CLOCK IC

The bq3285LF real-time clock IC complies with the advanced configuration and power interface (ACPI) specification and includes a century bit for Y2K compatibly plus other BIOS interface enhancements for increased software efficiency with the BIOS.The bq3285LF is targeted for a wide range of applications including notebook, laptop, and desktop PCs, network controllers, telecommunications equipment, and medical equipment.

The bq3285LF integrates standard and extended memory address bank latches to speed up clock and integrated RAM software access loops. The new century bit also removes the need for the Basic Input/Output System (BIOS) to perform this function. Additional features include alarm wake-up capability, 240 bytes of nonvolatile memory storage, a 32-KHz output available for memory refresh and processor communication timing, and address index shadowing. The bq3285LF is intended for 3-V operation.

The bq3285LF is backward-compatible with Unitrode's Benchmarq bq3285 clock family and can directly replace existing clocks. It is directly compatible with the clock/calendar for IBM AT-compatible computers and ensures data retention and clock operation. The devices contain an integrated nonvolatile controller, reducing board space and ensuring reliable system operation by synchronizing write-protection of the SRAM and clock.

Pricing for the bq3285LF in a 24-pin SSOP package is $2.32 for quantities of 25,000.

Unitrode Corp.
7 Continental Blvd.
Merrimack, NH 03054-4334
(603) 424-2410
www.unitrode.com

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