MAXIM MAX7391 Speed-Switching Clock Generator with Power Fail Manual
Update: 28 September, 2023
The MAX7391 is a product that replaces ceramic resonators, crystals, and supervisory functions for microcontrollers in 3.3V and 5V applications. It provides a clock source, reset, and power-fail functions. The programmable power-fail function provides early warning of power failure and can be configured to detect either an external voltage or the VCC supply to the device. The clock output can be switched between normal and half-speed operation. This functionality allows the microcontroller to operate at reduced power and may be used to extend the time available to perform housekeeping tasks, such as writing data to flash during a power failure. Connecting the power-fail output to the SPEED input reduces clock speed automatically during power-fail events. The MAX7391 clock output is factory programmed to a frequency in the 1MHz to 16MHz range. Four standard frequencies are available. Other frequencies are available upon request. The maximum operating supply current is 5.5mA (typ) with a clock frequency of 12MHz. Unlike typical crystal and ceramic resonator oscillator circuits, the MAX7391 is resistant to EMI and vibration, and operates reliably at high temperatures. The high-output drive current and absence of high-impedance nodes make the oscillator invulnerable to dirty or humid operating conditions. The MAX7391 is available in an 8-pin µMAX® package. The MAX7391 standard operating temperature range is from -40°C to +125°C.
Brand: MAXIM
File format: PDF
Size: 273 KB
MD5 Checksum: 00C8F718BC8F5D09E56F166498110A6A
Publication date: 21 March, 2012
Downloads: -
PDF Link: MAXIM MAX7391 Speed-Switching Clock Generator with Power Fail Manual PDF