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General Description

The MAX7378 dual-speed silicon oscillator with reset, is a replacement for ceramic resonators, crystals, crystal oscillator 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 low power operation. Switchover is synchronized internally to provide glitch-free clock switching.

Features

? 2.7V to 5.5V Operation

? Accurate High-Speed Oscillator: 600kHz to 10MHz

? Accurate Low-Speed 32kHz Oscillator

? Glitch-Free Switch Between High Speed and Low Speed at Any Time

? Reset Output Holds the μC in Reset for 100μs After Clock Startup

? ±10mA Clock-Output Drive Capability

? 2 Initial Accuracy

? ±50ppm/°C Temperature Coefficient

? 50 ±7 Output Duty Cycle

? 5ns Output Rise and Fall Time

? Low Jitter: 160ps (Peak-to-Peak) at 8MHz

? 2.4mA Fast-Mode Operating Current (8MHz)

? 11μA Slow-Mode Operating Current (32kHz)

? -40°C to +125°C Temperature Range

Applications

? White Goods

? Automotive

? Consumer Products

? Appliances and Controls

? Handheld Products

? Portable Equipment

? Microcontroller (μC) Systems

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