MAX7378

19-3350; Rev 0; 7/04 Silicon Oscillator with Low-Power Frequency Switching and Reset Output General Description The MAX7378 dual-speed silicon oscillator with reset, is a replacement for ceramic resonators, crystals, crystaloscillator modules, and discrete reset circuits. The MAX7378 provides the primary and secondary clock source and reset function for microcontrollers in 3V, 3.3V, and 5V applications. The MAX7378 features a factory-programmed high-speed oscillator, a 32.768kHz oscillator, a clock selector input, and a microprocessor (µP) power-on-reset (POR) supervisor. The clock output can be switched at any time between the high-speed clock and the 32.768kHz clock for lowpower operation. Switchover is synchronized internally to provide glitch-free clock switching. Unlike typical crystal and ceramic resonator oscillator circuits, the MAX7378 is resistant to vibration and EMI. The high-output-drive current and absence of highimpedance nodes make the oscillator less susceptible to dirty or humid operating conditions. With a wide operating temperature range as standard, the MAX7378 is a good choice for demanding home appliance, industrial, and automotive environments. The MAX7378 is available in an 8-pin µMAX® package. Refer to the MAX7384 data sheet for frequencies ≥10MHz. The MAX7378 standard operating temperature range is -40°C to +125°C. See the Applications Information section for the extended operating temperature range. ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ Features 2.7V to 5....