ADM13307

Triple Processor Supervisors ADM13307 FEATURES Triple supervisory circuits Supply voltage range of 2.0 V to 5.5 V Pretrimmed threshold options: 1.8 V, 2.5 V, 3.3 V, and 5 V Adjustable 0.6 V and 1.25 V voltage references Maximum supply current of 40 μA 140 ms (minimum) reset timeout RESET valid from VDD ≥ 1.1 V Push-pull RESET and RESET outputs 8-lead, narrow body SOIC package Temperature range: −40°C to +85°C VDD 14kΩ MR RESET SENSE1 R1 R2 RESET LOGIC + TIMER RESET R3 GND 1.25V R4 FUNCTIONAL BLOCK DIAGRAMS ADM13307-18 ADM13307-25 ADM13307-33 SENSE2 APPLICATIONS Supervising DSPs/microcontrollers Industrial and portable equipment Wireless systems Notebook/desktop computers OSCILLATOR GENERAL DESCRIPTION The ADM13307 is a triple voltage supervisor designed to monitor up to three voltage levels in DSP and microprocessorbased systems. There are five models available, all of which feature a combination of internally pretrimmed undervoltage threshold options for monitoring 1.8 V, 2.5 V, 3.3 V, and 5 V supplies. There are also two adjustable input options with undervoltage thresholds of either 0.6 V or 1.25 V. The ADM13307-18, ADM13307-25, and ADM13307-33 models have two internally fixed thresholds and one externally programmable threshold via a resistor string. The ADM13307-4 and ADM13307-5 offer one internally fixed threshold and two externally programmable thresholds. See the Ordering Guide for a list of all available options. During power-up, RESET is asserted when the suppl...