The MAX6870/MAX6871 Offer Optimal Flexibility to Meet Designers' Need for a Range of Sequencing/Supervisory Requirements
SUNNYVALE, CA-September 23, 2004-Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX6870/MAX6871, EEPROM-programmable, hex/quad power-supply sequencers/supervisors with an integrated 10-bit ADC. These programmable system-management devices provide design flexibility and high reliability in complex systems, such as those found in networking, telecommunication, storage, and base-station equipment applications.
The MAX6870/MAX6871 combine voltage monitoring, supervisory functions, margining control, and sequencing control. These devices are programmed through an I2C™ interface that selects monitored voltage thresholds, sequence and reset-timing specifications, and sets output configurations. Internal configuration EEPROM is used to store and update changes as necessary.
The MAX6870 features six voltage-detector inputs and eight programmable outputs, while the MAX6871 features four voltage-detector inputs and five programmable outputs. All voltage detectors offer dual voltage thresholds in 10mV increments for undervoltage, overvoltage, or dual undervoltage detection. These detectors can be configured to assert any of the outputs when any voltage is out of regulation.
The programmable outputs can be used to sequence supplies or provide system resets and interrupts with active-high or active-low logic. These outputs can be configured with open-drain, push-pull, and a charge-pump option (for driving external n-channel MOSFETs). There are eight available timeout periods ranging from 25ms to 1600ms. A margining enable input is available to set the outputs into a default (or disable) state.
An internal 8-channel, 10-bit ADC reads back the all the monitored voltages and two external inputs into its ADC registers. The ADC can be used to monitor voltage during margining or when trimming a power supply.
Other features of the MAX6870/MAX6871 include four general-purpose inputs, two watchdog timers, and a manual reset input. The devices are available in a 7mm x 7mm QFN package and are specified for operation over the extended temperature range (-40°C to +85°C). Prices start at $6.39 for the MAX6870 and $5.83 for the MAX6871 (1000-up, FOB USA). An evaluation kit with a graphical user interface is available to speed designs.
Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by
Philips.
|
