MAX16008 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Low-Voltage, High-Accuracy, Quad Window Voltage Detectors in Thin QFN

19-3869; Rev 0; 10/05
Low-Voltage, High-Accuracy, Quad Window
Voltage Detectors in Thin QFN
General Description
The MAX16008/MAX16009 are adjustable quad window
voltage detectors in a small thin QFN package. These
devices are designed to provide a higher level of sys-
tem reliability by monitoring multiple supply voltages
and providing a fault signal when any of the voltages
exceed their overvoltage thresholds or fall below their
undervoltage thresholds.
These devices offer user-adjustable thresholds that
allow voltages to be monitored down to 0.4V. These
devices allow the upper and lower trip thresholds of
each window detector to be set externally with the use
of three external resistors.
Each monitored threshold has an independent open-
drain output for signaling a fault condition. The outputs
can be wire OR’ed together to provide a single fault
output. The open-drain outputs are internally pulled up
with a 30µA current, but can be externally driven to
other voltage levels for interfacing to other logic levels.
Both devices feature a margin input to disable the out-
puts during margin testing or any other time after
power-up operations. The MAX16009 offers a reset out-
put that deasserts after a reset timeout period after all
voltages are within their threshold specifications. The
reset timeout is internally set to 140ms (min), but can
be externally adjusted to other reset timeouts using an
external capacitor. In addition, the MAX16009 offers a
manual reset input.
All devices are offered in a 4mm x 4mm thin QFN pack-
age and are fully specified from -40°C to +125°C.
Applications
Storage Equipment
Networking/Telecommunications Equipment
Multivoltage ASICs
Servers
Features
♦ Monitor Four Undervoltage/Overvoltage Conditions
♦ 1.5% Accuracy Over Temperature
♦ User-Adjustable Thresholds (Down to 0.4V)
♦ Open-Drain Outputs with Internal Pullups Reduce
the Number of External Components
♦ Manual Reset Input (MAX16009)
♦ Margin Enable Input
♦ Fixed or Adjustable RESET Timeout (MAX16009)
♦ Guaranteed Correct Output Logic State Down to
V_CC = 1V
♦ Fully Specified from -40°C to +125°C
♦ Small, 4mm x 4mm Thin QFN Package
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
PKG
CODE
MAX16008TP+ -40°C to +125°C 20 Thin QFN T2044-3
MAX16009TG+ -40°C to +125°C 24 Thin QFN T2444-4
+Denotes lead-free package.
For tape-and-reel, add a “T” after the “+.” Tape-and-reel are
offered in 2.5k increments.
Typical Operating Circuit
3.5V
2.5V
1.8V
VCC _RESET
VCC
RESET
µC
1.5V
UVIN1
UVOUT1
GND
OVIN1
OVOUT1
UVIN2
UVOUT2
MAX16009
OVIN2
OVOUT2
UVIN3
UVOUT3
OVIN3
OVOUT3
UVIN4
UVOUT4
Pin Configurations and Selector Guide appear at end of data
sheet.
OVIN4
OVOUT4
GND
________________________________________________________________ Maxim Integrated Products 1
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1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.