MAX6892 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Pin-Selectable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors

19-3596; Rev 0; 2/05
Pin-Selectable, Octal/Hex/Quad, Power-Supply
Sequencers/Supervisors
General Description
The MAX6892/MAX6893/MAX6894 pin-selectable, mul-
tivoltage supply sequencers/supervisors monitor sever-
al voltage-detector inputs and one watchdog input,
asserting the respective voltage detector or watchdog
output when the inputs drop below the configured volt-
age thresholds or the watchdog timer expires. The
MAX6892 features eight voltage detector inputs and 10
outputs. The MAX6893 features six voltage-detector
inputs and eight outputs, while the MAX6894 features
four voltage detector inputs and six outputs. A RESET
output ensures all monitored inputs are above the set
thresholds. The voltage detector outputs are configured
as open drain. Manual reset and margin disable inputs
offer additional flexibility.
The thresholds of the MAX6892/MAX6893/MAX6894 are
selected through five logic inputs (TH0–TH4). The logic on
these five inputs selects the supply voltage tolerance (5%
or 10%) and one of 32 factory-set thresholds settings.
Watchdog and reset timeout periods can use factory
default settings or are independently adjustable by con-
necting external capacitors.
When any of the monitored voltages falls below its
threshold, the respective output asserts and remains
asserted for 6.25ms (typ) after the monitored voltage
exceeds the threshold. The outputs can be connected
to the shutdown or enable inputs of DC-DC regulators
to provide turn-on power sequencing to ensure proper
system initialization.
The MAX6892 is available in a 5mm x 5mm x 0.8mm,
32-pin, thin QFN package, while the MAX6893/
MAX6894 are available in a 5mm x 5mm x 0.8mm, 28-
pin, thin QFN package. The MAX6892/MAX6893/
MAX6894 are specified to operate over the extended
temperature range (-40°C to +85°C)
Applications
Telecommunication/Central Office Systems
Networking Systems
Servers/Workstations
Base Stations
Storage Equipment
Multimicroprocessor/Voltage Systems
Typical Operating Circuit appears at end of data sheet.
Features
♦ Pin-Selectable or User-Adjustable Voltage
Detector Thresholds
♦ Dedicated RESET and WDO Outputs
♦ Capacitor-Adjustable Reset and Watchdog
Timeout Periods
♦ Factory-Default Reset and Watchdog Timeout
Periods
♦ Up to Eight Independent, Open-Drain Power-Good
Outputs
♦ Enable Margining Disable and Manual Reset
Controls
♦ -40°C to +85°C Operating Temperature Range
♦ Small 5mm x 5mm Thin QFN Package
♦ Few External Components
♦ ±1% Threshold Accuracy
Ordering Information
PART
MAX6892ETJ
MAX6893ETI
MAX6894ETI
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
32 Thin QFN
28 Thin QFN
28 Thin QFN
PKG
CODE
T3255-4
T2855-8
T2855-8
Pin Configurations
TOP VIEW
32 31 30 29 28 27 26 25
PG2 1
PG3 2
PG4 3
GND 4
PG5 5
PG6 6
PG7 7
PG8 8
MAX6892
*EXPOSED PADDLE
24 IN7
23 IN8
22 DBP
21 VCC
20 ENABLE
19 SRT
18 SWT
17 TH4
9 10 11 12 13 14 15 16
THIN QFN
*EXPOSED PAD INTERNALLY CONNECTED TO GND.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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