MAX6887_10 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Hex/Quad, Power-Supply Supervisory Circuits

19-0291; Rev 2; 2/10
Hex/Quad, Power-Supply Supervisory Circuits
General Description
The MAX6887/MAX6888 multivoltage supply supervi-
sors provide several voltage-detector inputs, one watch-
dog input, and three outputs. Each voltage-detector
input offers a factory-set undervoltage and overvoltage
threshold. Manual reset and margin disable inputs offer
additional flexibility.
The MAX6887 offers six voltage-detector inputs, while
the MAX6888 offers four inputs. Output RESET asserts
when any input voltage drops below its respective
undervoltage threshold or manual reset MR is asserted.
Output OV asserts when any input voltage exceeds its
respective overvoltage threshold. Monitor standard
supply voltages listed in the Selector Guide.
The MAX6887/MAX6888 offer a watchdog timer with an
initial and normal timeout periods of 102.4s and 1.6s,
respectively. Watchdog output WDO asserts when the
watchdog timer expires. Connect WDO to manual reset
input MR to generate resets when the watchdog timer
expires. RESET, OV, and WDO are active-low, open-
drain outputs.
The MAX6887/MAX6888 are available in a 5mm x 5mm
x 0.8mm, 16-pin thin QFN package and operate over
the extended -40°C to +85°C temperature range.
Applications
Multivoltage Systems
Telecom
Networking
Servers/Workstations/Storage Systems
Features
o Hex/Quad Voltage Detectors
o Undervoltage and Overvoltage Thresholds
o 1% Threshold Accuracy
o Margining Disable and Manual Reset Input
o Watchdog Timer
o Open-Drain RESET, OV, and WDO Outputs
o 180ms (min) Reset Timeout Period
o Few External Components
o Small 5mm x 5mm, 16-Pin Thin QFN Packages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX6887_ETE+
-40°C to +85°C 16 Thin QFN-EP*
MAX6888_ETE+
-40°C to +85°C 16 Thin QFN-EP*
Note: Insert the desired letter from the Selector Guide into the
blank to complete the part number.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
Selector Guide
PART
NOMINAL INPUT VOLTAGE (V)*
IN1 IN2 IN3 IN4 IN5 IN6
MAX6887AETE 5.0 3.3 2.5 1.8 Adj Adj
MAX6887BETE 5.0 3.3 2.5 Adj Adj Adj
MAX6887CETE 5.0 3.3 1.8 Adj Adj Adj
MAX6887DETE 3.3 2.5 1.8 1.5 Adj Adj
MAX6887EETE 3.3 2.5 1.8 Adj Adj Adj
MAX6887FETE 3.3 2.5 1.5 Adj Adj Adj
MAX6887GETE 3.3 2.5 Adj Adj Adj Adj
MAX6887HETE 3.3 1.8 Adj Adj Adj Adj
MAX6887QETE Adj Adj Adj Adj Adj Adj
TOL
(%)
5
5
5
5
5
5
5
5
5
PART
NOMINAL INPUT VOLTAGE (V)*
IN1 IN2 IN3 IN4 IN5 IN6
MAX6887IETE 5.0 3.3 2.5 1.8 Adj Adj
MAX6887JETE 5.0 3.3 2.5 Adj Adj Adj
MAX6887KETE 5.0 3.3 1.8 Adj Adj Adj
MAX6887LETE 3.3 2.5 1.8 1.5 Adj Adj
MAX6887METE 3.3 2.5 1.8 Adj Adj Adj
MAX6887NETE 3.3 2.5 1.5 Adj Adj Adj
MAX6887OETE 3.3 2.5 Adj Adj Adj Adj
MAX6887PETE 3.3 1.8 Adj Adj Adj Adj
MAX6887RETE Adj Adj Adj Adj Adj Adj
*See thresholds options tables (Tables 1 and 2) for actual undervoltage and overvoltage thresholds.
Selector Guides continued at end of data sheet.
TOL
(%)
10
10
10
10
10
10
10
10
10
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