MAX6884_05 Datasheet, PDF (1/34 Pages) Maxim Integrated Products – EEPROM-Programmable, Hex Power-Supply Supervisory Circuits

19-3594; Rev 0; 2/05
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EEPROM-Programmable, Hex
Power-Supply Supervisory Circuits
General Description
The MAX6884/MAX6885 EEPROM-configurable, multi-
voltage power-supply supervisors monitor six voltage-
detector inputs, one auxiliary input, and one watchdog
input, and feature three programmable outputs for highly
configurable power-supply monitoring applications.
Manual reset and margin disable inputs offer additional
flexibility.
Each voltage-detector input offers a programmable pri-
mary undervoltage and secondary undervoltage/over-
voltage threshold. Voltage-detector inputs IN1–IN6
monitor voltages from 1V to 5.8V in 20mV increments or
0.5V to 3.05V in 10mV increments.
Programmable outputs RESET, UV/OV, and WDO pro-
vide system resets/interrupts. Programmable output
options include open-drain or weak pullup. Program-
mable timing delay blocks configure each output to
wait between 25µs and 1600ms after their respective
assertion-causing conditions have been cleared. A fault
register logs condition-causing events (undervoltage,
overvoltage, manual reset, etc.).
An internal 10-bit, 1% accurate ADC (MAX6884 only)
converts the voltages at IN1–IN6, AUXIN, and V_CC
through a multiplexer that automatically sequences
through all inputs every 200ms. An SMBus™/I²C-com-
patible serial data interface programs and communi-
cates with the configuration EEPROM, configuration
registers, internal 512-bit user EEPROM, and reads the
ADC registers (MAX6884 only) and fault registers.
The MAX6884/MAX6885 are available in a 5mm x 5mm
x 0.8mm 20-pin thin QFN package and operate over
the extended temperature range (-40°C to +85°C).
Applications
Telecommunications/Central-Office Systems
Networking Systems
Servers/Workstations
Base Stations
Storage Equipment
Multimicroprocessor/Voltage Systems
Features
♦ 6 Configurable Input Voltage Detectors
Programmable Thresholds 0.5V to 3.05V
(in 10mV Increments) or 1V to 5.8V (in 20mV
Increments)
Primary UV and Secondary UV/OV Thresholds
♦ One Configurable Watchdog Timer from 6.25ms
to 102.4s
♦ Configurable RESET, UV/OV, and WDO Outputs
♦ Three Programmable Outputs
Open-Drain or Weak Pullup RESET, UV/OV,
and WDO
Active-Low Output Logic
Timing Delays from 25µs to 1600ms
♦ Margining Disable and Manual Reset Controls
♦ Internal 1.25V Reference or External Reference
Input
♦ 10-Bit Internal ADC Samples the Input Voltage
Detectors, V_CC and Auxiliary Input
♦ 512-Bit User EEPROM
Endurance: 100,000 Erase/Write Cycles
Data Retention: 10 Years
♦ SMBus/I²C-Compatible Serial
Configuration/Communication Interface
♦ ±1% Threshold Accuracy
Ordering Information
PART
MAX6884ETP
MAX6885ETP
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
PKG
CODE
20 Thin QFN
20 Thin QFN
T2055-5
T2055-5
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
Selector Guide
PART
MAX6884ETP
MAX6885ETP
VOLTAGE-
DETECTOR INPUTS
6
6
INTERNAL ADC
Yes
No
PROGRAMMABLE
OUTPUTS
REFERENCE INPUT
AUXILIARY INPUT
3
Yes
Yes
3
No
No
________________________________________________________________ Maxim Integrated Products 1
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1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.