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Temp sensor packs EEPROM

Posted: 09 Dec 2008 ?? ?Print Version ?Bookmark and Share

Keywords:temperature sensor? EEPROM? memory module?

ON Semiconductor has unveiled the CAT34TS02 temperature sensor that combines a 12bit (plus Sign bit) digital output temperature sensor with 2Kbit of Serial Presence Detect (SPD) EEPROM for DDR3 applications in high-speed PCs and laptops, graphics cards, servers, telecom equipment and base stations, environmental control systems and industrial process control equipment.

The CAT34TS02 is compliant to JEDEC specification JC42.4, providing 1C temperature sensing accuracy from 75C to 95C and 3C accuracy from +20C to +100C, across the device supply voltage range of 3V to 3.6V. It measures and records the system temperature approximately 10 times per second, with readings compared to three trigger limits stored in the internal memory registers. Readings can be retrieved by the host system via the I?C/SMBus interface and over- and underlimit conditions are signaled on the open-drain EVENT pin.

For general-purpose temperature sensor applications, integrating the temperature sensor with non-volatile EEPROM eliminates the need for external memory to store sensor and threshold configurations. Additionally, the CAT34TS02 non-volatile memory retains custom-configured sensor and threshold values at power-up resulting in a simple, space-saving and cost-effective solution.

The integrated 2Kbit SPD EEPROM is internally organized as 16 pages of 16 bytes each, for a total of 256 bytes. The EEPROM features a 16byte page write buffer, supports both the Standard (100kHzkHz) and Fast (400kHz) I?C protocols and features Permanent and Reversible Software Write Protection, defined as standard for all DDR3 DIMM modules.

Pricing for the CAT34TS02 temperature sensor with EEPROM, 2mm x 3mm 8-pad TDFN, is $0.75 each, in 10,000-unit quantities. Samples are available now. Projected lead-time for production quantities is currently six to eight weeks ARO.

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