ADM6339

Quad Voltage Microprocessor Supervisory Circuit ADM6339 FEATURES Accurate monitoring of up to four power supply voltages 6 factory-set threshold options: −5.0 V, +1.8 V, +2.5 V, +3.0 V, +3.3 V, and +5.0 V Adjustable input threshold options: −0.5 V (±2.0% accuracy), +0.62 V (±0.8% accuracy), and +1.23 V 200 ms typical reset timeout Open-drain RESET output (10 μA internal pull-up) Reset output stage: active low, valid to IN1 = 1 V or IN2 = 1 V Low power consumption (55 μA) Glitch immunity Specified from −40°C to +85°C 6-lead SOT-23 package IN1 FUNCTIONAL BLOCK DIAGRAM IN1 5V PULLUP IN2 IN2 RESET IN3 200ms TIMEOUT IN4 VREF ADM6339 Figure 1. APPLICATIONS Telecommunications Microprocessor systems Data storage equipment Servers/workstations GENERAL DESCRIPTION The ADM6339 is a high accuracy supervisory circuit capable of monitoring up to four system supply voltages. The ADM6339 incorporates a variety of internally pretrimmed undervoltage threshold options for monitoring −5.0 V, +1.8 V, +2.5 V, +3.0 V, +3.3 V, and +5.0 V supply voltages. Tolerance levels of ±5% and ±10% are available. The device is also available with one to three adjustable threshold options. The adjustable voltage threshold options are +1.23 V, +0.62 V, and −0.5 V. See the Ordering Guide section for a list and description of all available options. If a monitored power supply voltage decreases below the minimum voltage threshold (or rises above the maximum voltage threshold for the −0.5 V and −5.0 V input op...