Microchip Technology Improves Accurate Temperature Sensing with Two Digital Thermal Sensors Featuring SPI Interface

11/13/2002 - Expanding its temperature sensor product portfolio, Microchip Technology announced two high-accuracy, high-resolution digital thermal sensors, both featuring an SPITM interface, ideal for a wide range of wireless, networking, handheld and computing applications.

Referred to as the TC77 and the TC72, the thermal sensors are able to read temperature without the need for any external components and communicate thermal data via 3- and 4-wire industry standard interfaces, respectively. The TC72, offered in the 8-pin 3x3-mm DFN and the MSOP package, and the TC77, offered in the tiny 5-pin SOT-23 and the 8-pin SOIC package, enable designers to save a significant amount of board space while improving temperature sensing capability. The DFN package has a lower profile, as well as significantly better thermal resistance than standard package types and also provides designers improved ability to manufacture through the elimination of conventional side leads.

"These new devices offer exceptional power savings while occupying the smallest possible board space. In addition, they are capable of measuring temperature extremely accurately, with a maximum temperature error of 1 degree Celsius over a certain temperature range, and communicate with a variety of microcontrollers and other digital ICs," said George Paparrizos, product marketing manager for the Analog and Interface Product Division at Microchip. "Microchip continues to design and develop proprietary solutions that enable designers to solve most temperature-sensitive requirements."

Both sensors consume the lowest operating current (250uA typical) for a given temperature conversion time in the industry. This combined with the ultra-low power shutdown mode (1 microamp typical), enables designers to extend battery life in portable electronics.

The TC72 is capable of reading temperatures from -55?C to +125?C and features an operating voltage range of 2.65- to 5.5-volts. Temperature resolution for this device is 0.25?C per bit and temperature accuracy is 2?C maximum over the entire -40?C to +85?C temperature range. The TC77 offers very high-resolution (0.0625?C per bit) enabling systems to quickly detect critical thermal conditions, which leads to precise temperature measurement. The device offers an extended temperature range of -55?C to +125?C and an operating voltage range of 2.7- to 5.5-volts.

Pricing for the TC72 in 1,000-unit quantities is $0.89 each in the DFN-8 package and $0.79 for the MSOP-8 version. Pricing for the TC77 in 1,000-unit quantities is $0.86 each in the SOT-23-5 package and $0.79 for the SOIC-8 version. Samples and volume quantities are available today. For more information, contact any Microchip sales representative or authorized worldwide distributor.

About Microchip Technology
Microchip has integrated analog technology, peripherals and features to meet today's demanding design requirements. Our broad spectrum of analog products addresses thermal management, power management, mixed-signal, linear and interface solutions. Combined with "Intelligent Analog" microcontrollers, Microchip offers an extensive analog portfolio for thousands of high-performance design applications in the automotive, communications (wireless), consumer, computing and industrial control markets.

Microchip Technology Inc. manufactures the popular PICmicro® field-programmable RISC microcontrollers, which serve 8- and 16-bit embedded control applications, and a broad spectrum of high performance linear and mixed-signal, power management and thermal management devices. The Company also offers complementary microperipheral products including interface devices; microID® RFID devices; serial EEPROMs; and the patented KEELOQ® security devices. This synergistic product portfolio targets thousands of applications and a growing demand for high-performance designs in the automotive, communications, computing, consumer and industrial control markets. The Company's quality systems are ISO 9001 (1994 version) and QS9000 (1998 version) certified. Microchip is headquartered in Chandler, Arizona with design facilities in Mountain View, California and Bangalore, India; semiconductor fabrication facilities in Tempe and Chandler, Arizona and Puyallup, Washington; and assembly and test operations near Bangkok, Thailand. Microchip employs approximately 3,300 people worldwide and has sales offices throughout Asia, Europe, Japan and the Americas.

The Microchip name and logo, PIC, PICmicro, microID and KEELOQ are registered trademarks of Microchip Technology Inc. in the USA and other countries. SPI is a trademark of Motorola.

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