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ON Semiconductor Introduces Temperature Sensor with Integrated EEPROM for Memory Module Applications  Chinese Japanese Korean

CAT34TS02 provides simple, space-saving solution for DDR3 applications

PHOENIX, Ariz. – December 4, 2008 - ON Semiconductor (Nasdaq: ONNN), a leading global supplier of high performance, energy efficient, silicon solutions has unveiled the second device in a new line of temperature sensors recently acquired from Catalyst Semiconductor. The new CAT34TS02 combines a 12-bit (plus Sign bit) digital output temperature sensor with 2 kilobits (Kb) 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 ±1°C temperature sensing accuracy from 75° C to 95° C and ±3° C accuracy from +20° C to +100° C, across the device supply voltage range of 3.0 volts (V) to 3.6 V. 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 I2C/SMBus interface and over- and under-limit 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 2 Kb SPD EEPROM is internally organized as 16 pages of 16 bytes each, for a total of 256 bytes. The EEPROM features a 16-byte page write buffer, supports both the Standard (100 kilohertz - kHz) and Fast (400 kHz) I2C protocols and features Permanent and Reversible Software Write Protection, defined as standard for all DDR3 DIMM modules.

Product Features
• 12-bit digital temperature sensor with 2 Kb integrated serial presence detect (SPD) EEPROM
• Compliant to JEDEC spec JC42.4 for DDR3 DIMM memory modules
• Temperature range: +20° C to +100° C
• Supply Range: 3.0 V to 3.6 V
• I2C/SMBus interface
• Packaging: 8-pad TDFN (2 mm x 3 mm)

Price and Availability
Pricing for the CAT34TS02 temperature sensor with EEPROM is $0.75 each, in 10,000 unit quantities. Samples are available now. Projected lead-time for production quantities is currently 6 to 8 weeks ARO.

Additional information: CAT34TS02 or contact Thruston Awalt at thruston.awalt@onsemi.com.

About ON Semiconductor
With its global logistics network and strong product portfolio, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of high performance, energy efficient, silicon solutions to customers in the power supply, automotive, communication, computer, consumer, medical, industrial, mobile phone, and military/aerospace markets. The company’s broad portfolio includes power, analog, DSP, mixed-signal, advance logic, clock management, non-volatile memory and standard component devices. Global corporate headquarters are located in Phoenix, Arizona. The company operates a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. For more information, visit http://www.onsemi.com.

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ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.

I2C is a registered trademark of Philips Corporation. Catalyst Semiconductor, Inc. is licensed by Philips Corporation to carry the I2C bus protocol.