Archive : 10 December 2007 год

Texas Instruments introduced a resistor-programmable temperature switch. The TMP300 allows simple temperature monitoring and control. The TMP300 features a trip point that is set by adding a single resistor, and the open-drain output can control a power switch or provide a processor interrupt. A separate pin on the device provides an analog output (10mV/C) that can serve as a testing point or can be used in temperature-compensation loops.

 With a supply voltage range of 1.8V to 18V, the TMP300 allows for simple thermal monitoring without requiring an MCU/DSP. The analog output measures temperature with +/-3C accuracy (max) and the temperature switch has +/-4C switch accuracy over a temperature range of -40C to 125C. Hysteresis of the TMP300 is pin programmable to two states of either 5C or 10C. The TMP300 is available from TI and its authorized distributors in a SC70 package and is priced at $1.00 each in 100-piece quantities (suggested resale pricing). It will be introduced in a SOT23 package during 1Q 2008.

Fairchild Semiconductor’s FAN5645, a single wire programmable LED driver, offers a solution for blinking LED indicators. This device records a blinking pattern and plays it indefinitely, eliminating the need for continual system processor control. This results in energy savings and longer battery life since the FAN5645 consumes much less current (33µA Typ.) when compared to a system processor’s consumption in the mA range. The autonomous operation of the FAN5645 LED driver eliminates the need for an interrupt driven processor to control the sequencing of the LED, freeing up processor bandwidth. Packaged in a compact MLP 3.0mm x 3.0mm package, the FAN5645 is ideal for space-constrained portable and battery-operated applications such as cell phones, toys, home appliances, mobile computing, Bluetooth peripherals, rechargeable flashlights, motion sensors and power tools. The FAN5645 utilizes lead-free (Pb-free) terminals and has been characterized for moisture sensitivity in accordance with the Pb-free reflow requirements of the joint IPC/JEDEC standard J-STD-020. All of Fairchild's products are designed to meet the requirements of the European Union's Directive on the restriction of the use of certain substances (RoHS). The price is $0.65 (each, 1000 pcs).