For small, low-cost units, such as remote-keyless-entry or tire-pressure-monitor devices, the frequency-determining elements constitute a major design consideration. Murata Electronics claims that its SARCC series of SAW (surface-acoustic-wave) resonators are the smallest in the industry, initially providing a choice among oscillation frequencies of 304.30, 315, 423.22, 433.87, 433.92, and 434.15 MHz and four tolerances of ±50 to ±100 kHz. These 32-mg units have a 3×3-mm footprint and 1.15-mm height, so their footprint, volume, and weight are respectively 45%, 30%, and 50% less than their equivalent parameters in existing Murata units. Price in volume quantities is less than $1.

Murata Electronics North America, 1-770-436-1300, www.murata.com.