MAX6338PUB+T

The MAX6338 is a low-power (25μA), quad voltage monitor designed for multivoltage systems. Preset voltage options for +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V make these quad monitors ideal for applications such as telecommunications, desktop and notebook computers, high-end printers, data storage equipment, and networking equipment. The MAX6338 has an internally trimmed threshold that minimizes or eliminates the need for external components. The four open-drain outputs have weak (10μA) internal pullups to VCC, allowing them to interface easily with other logic devices. The MAX6338 can monitor power supplies with either 5% or 10% tolerance specifications, depending on the selected version. An additional high-input-impedance comparator option can be used as an adjustable voltage monitor, general-purpose comparator, or digital level translator. The weak internal pullups can be overdriven by external pullups to any voltage from 0 to +5.5V. Internal circuitry prevents current flow from the external pullup voltage to VCC. The outputs can be wire-ORed for a single “power good” signal. The MAX6338 has either one or two auxiliary inputs and two or three factory-programmed threshold voltages, or four fixed voltages. The inverting input of all comparators is connected to a 1.23V bandgap reference for all positive voltages.

Applications

• Telecommunications
• High-End Printers
• Desktop and Notebook Computers
• Data Storage Equipment
• Networking Equipment
• Industrial Equipment
• Set-Top Boxes

Key features

• The MAX6338 quad voltage monitor is capable of monitoring up to four supplies without any external components.
• A variety of factory-trimmed threshold voltages and supply tolerances are available to optimize the MAX6338 for specific applications.
• The selection includes input options for monitoring +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V voltages.
• An additional high-input impedance comparator option can be used as an adjustable voltage monitor, general-purpose comparator, or digital level translator.
• Each of the monitored voltages is available with trip thresholds to support power-supply tolerances of either 5% or 10% below the nominal voltage.
• An internal bandgap reference ensures accurate trip thresholds across the extended (-40°C to +85°C) operating temperature range.
• The MAX6338 consumes 25μA (typ) supply current and operates with supply voltages from +2.5V to +5.5V.
• An internal undervoltage lockout circuit forces all four digital outputs low when VCC drops below the minimum operating voltage.
• The four digital outputs all have weak internal pull-ups to VCC, allowing wire-ORed connection.
• Each input threshold voltage has an independent output.
• The MAX6338 is available in a 10-pin μMAX package.