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MAX6400 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX6400
Description  μP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

MAX6400 Datasheet(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX6400–MAX6405 is a family of ultra-low power
microprocessor (µP) supervisory circuits used for moni-
toring battery, power-supply, and regulated system
voltages. Each device contains a precision bandgap
reference comparator and is trimmed to specified trip
threshold voltages. These devices provide excellent cir-
cuit reliability and low cost by eliminating external com-
ponents and adjustments when monitoring system
voltages from 2.5V to 5.0V. A manual reset input is also
The MAX6400–MAX6405 assert a reset signal whenev-
er the VCC supply voltage falls below a preset thresh-
old. These devices are differentiated by their output
logic configurations and preset threshold voltages. The
MAX6400/MAX6403 (push-pull) and the MAX6402/
MAX6405 (open-drain) have an active-low reset (RESET
is logic low when VCC is below VTH). The MAX6401/
MAX6404 have an active-high push-pull output (RESET
is logic high when VCC is below VTH). All parts are
guaranteed to be in the correct output logic state for
VCC down to 1V. The reset circuit is designed to ignore
fast transients on VCC. The MAX6400/MAX6401/
MAX6402 have voltage thresholds between 2.20V and
3.08V in approximately 100mV increments. The
MAX6403/MAX6404/MAX6405 have voltage thresholds
between 3.30V and 4.63V in approximately 100mV
Ultra-low supply current of 500nA (MAX6400/MAX6401/
MAX6402) makes these parts ideal for use in portable
equipment. These devices are available in 4-bump
chip-scale packages (UCSP™)
Portable/Battery-Powered Equipment
Cell Phones
MP3 Players
o Ultra-Small 4-Bump (2 2) Chip-Scale Package,
(Package Pending Full Qualification—Expected
Completion Date 6/30/01. See UCSP Reliability
Section for More Details.)
o 70% Smaller Than SC70 Package
o Ultra-Low 500nA (typ) Supply Current
o Factory-Trimmed Reset Thresholds from 2.20V to
4.63V in Approximately 100mV Increments
o ±2.5% Threshold Accuracy -40°C to +85°C
o Factory-Set 100ms (min) Reset Timeout Period
o Manual Reset Input
o Guaranteed Reset Valid to VCC = 1.0V
o Three Reset Output Logic Options: Active-Low
Push-Pull, Active-High Push-Pull, and Active-Low
o Immune to Short VCC Transients
o No External Components
µP Supervisory Circuits in 4-Bump (2
Chip-Scale Package
________________________________________________________________ Maxim Integrated Products
2.20 to 3.08
Push-Pull, Active-Low
2.20 to 3.08
Push-Pull, Active-High
2.20 to 3.08
Open-Drain, Active-Low
3.30 to 4.63
Push-Pull, Active-Low
3.30 to 4.63
Push-Pull, Active-High
3.30 to 4.63
Open-Drain, Active-Low
Ordering Information
MAX6400BS_ _-T
oC to +85oC
MAX6401BS_ _-T
oC to +85oC
MAX6402BS_ _-T
oC to +85oC
MAX6403BS_ _-T
oC to +85oC
MAX6404BS_ _-T
oC to +85oC
MAX6405BS_ _-T
oC to +85oC
Selector Guide
The MAX6400–MAX6405 are available in factory-set VCC reset
thresholds from 2.20V to 4.63V, in approximately 0.1V incre-
ments. Choose the desired reset-threshold suffix from Table 1
and insert it in the blank space following “S”. There are 21 stan-
dard versions with a required order increment of 2500 pieces.
Sample stock is generally held on the standard versions only
(Table 1). Required order increment is 10,000 pieces for non-
standard versions (Table 2). Contact factory for availability. All
devices available in tape-and-reel only.
UCSP reliability is integrally linked to the user’s assembly
methods, circuit board material, and environment. Refer to the
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
Pin Configuration appears at end of data sheet.
19-2043; Rev 1; 8/01
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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