MAX810

INTEGRATED CIRCUITS MAX809/MAX810 3-pin microprocessor resets Product data Supersedes data of 2002 Oct 21 2003 Aug 08 Philips Semiconductors Philips Semiconductors Product data 3-pin microprocessor resets MAX809/MAX810 DESCRIPTION The MAX809/MAX810 are single function microprocessor resets used to monitor supply voltages in microprocessor and other logic systems. They provide a reset signal to the microprocessor during power-up, power-down, and brownout conditions. The reset signal is asserted when the supply voltage drops below the preset threshold, and the signal is released a set time after the supply voltage has risen above the preset threshold. The MAX809 has an active-LOW reset output while the MAX810 has an active-HIGH reset output. The low supply current of typically 17 µA makes the MAX809/MAX810 ideal for use in portable, battery operated equipment. They are available in the 3-pin SOT23 and SC70 packages. FEATURES Monitors 5.0 V, 3.3 V and 3 V supplies 140 ms min. reset delay time: – Active-LOW RESET output (MAX809) – Active-HIGH RESET output (MAX810) Power supply transient immunity Guaranteed reset valid for 1.1 V Available in small SOT23 and SC70 3-pin packages No external components needed Specified over full temperature range –40 °C to +105 °C APPLICATIONS Embedded controllers Battery operated systems Wireless communication systems PDAs and handheld equipment SIMPLIFIED SYSTEM DIAGRAMS VCC VCC VCC VCC VCC VCC MAX809 RESET GND MI...