Processor Supervisor 4.7V 3/3.3/5V 3-Pin SOT-23 T/R

The ASM809 is cost effective 3.0V, 3.3V and 5.0V power supply supervisor circuits optimized for low-power micropr Deg Cessor (µP), micr Deg Controller (µC) and digital systems. They provide a reset output during power-up, power-down and brown-out conditions. They provide excellent reliability by eliminating external components and adjustments. The ASM809/810 are improved drop-in replacements for the Maxim MAX809/810 and feature 60% lower supply current. A reset signal is issued if the power supply voltage drops below a preset reset threshold and is asserted for at least 140ms after the supply has risen above the reset threshold. The ASM809 has an active-low RESET output that is guaranteed to be in the correct logic state for VCC down to 1.1V. The ASM810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC. Low supply current makes the ASM809/ASM810 ideal for use in portable and battery operated equipment. The ASM809 is available in a compact, industry standard 3-pin SOT23 package.

• Monitor 5V, 3.3V and 3V supplies
• 140ms min. reset pulse width
• Active-low reset valid with 1.1V supply (ASM809)
• Small 3-pin SOT-23 package
• No external components
• Specified over full temperature range -40°C to 105°C