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PDF MAX6466 Data sheet ( Hoja de datos )
| Número de pieza | MAX6466 | |
| Descripción | Ultra-Low-Power Voltage Detectors and UP Supervisory Circuits | |
| Fabricantes | Maxim Integrated | |
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19-2533; Rev 1; 1/03
Ultra-Low-Power Voltage Detectors and
µP Supervisory Circuits
General Description
The MAX6461–MAX6466 family of ultra-low-power voltage
detectors and µP reset supervisory circuits monitors bat-
tery, power-supply, and system voltages. Each circuit
includes a precision bandgap reference, a comparator,
internally trimmed resistor networks that set specified trip
thresholds, and an internal 5% threshold hysteresis circuit
(see the Functional Diagram). Output is asserted when
VCC falls below the internal VTH- and remains asserted
until VCC rises above VTH+ (VTH+ = VTH- × 1.05). These
devices provide excellent circuit reliability and low cost
by eliminating external components and adjustments
when monitoring nominal system voltages from +1.6V to
+5.5V. The MAX6461/MAX6462/MAX6463 are voltage
detectors with a propagation delay of 17µs.
The MAX6464/MAX6465/MAX6466 are µP supervisory
circuits with a minimum reset timeout period of 150ms. All
devices are available with thresholds from +1.6V to +5.5V
in 100mV increments.
The family is available with three output stage options:
push-pull with active-low output, push-pull with active-
high output, and open drain with active-low output. These
devices are available in SC70 and SOT23 packages
specified over the -40°C to +125°C temperature range.
Applications
Precision Battery Monitoring
Load Switching/Power Sequencing
Power-Supply Monitoring in Digital/Analog
Systems
Noise-Immune µP Reset Circuits
Portable/Battery-Powered Equipment
Cellular Phones/Cordless Phones
PDAs
Portable Medical Devices
Features
o Ultra-Low 1.0µA Supply Current
o Preset Thresholds from +1.6V to +5.5V in 100mV
Increments
o Internal 5% Threshold Hysteresis
o ±2.5% Threshold Accuracy Over Temperature
o Internal Timeout Period Option (150ms min)
o Immune to Short Voltage Transients
o No External Components
o Available in Three Output Options: Push-Pull
(Active Low/Active High) and Open Drain (Active
Low)
o Fully Specified from -40°C to +125°C
o Small SC70 and SOT23 Packages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX6461XR_ _-T -40°C to +125°C 3 SC70-3
MAX6461UR_ _-T -40°C to +125°C 3 SOT23-3
MAX6461UK_ _-T -40°C to +125°C 5 SOT23-5
MAX6462XR_ _-T -40°C to +125°C 3 SC70-3
MAX6462UR_ _-T -40°C to +125°C 3 SOT23-3
MAX6462UK_ _-T -40°C to +125°C 5 SOT23-5
The MAX6461–MAX6466 are available in factory-set thresholds
from 1.6V to 5.5V in approximately 100mV increments. Choose
the desired voltage threshold suffix from Table 1 and insert it in
the blank spaces in the part number. There are 30 standard ver-
sions with a required order increment of 2500 pieces. Sample
stock generally is held on the standard versions only (Table 2).
Nonstandard versions require a 10k-piece order increment.
Contact factory for availability. All devices available in tape-and-
reel only.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
Pin Configurations
TOP VIEW
GND 1
N.C. 1
5 VCC (OUT)/OUT 1
(OUT)/OUT 2
MAX6461–
MAX6466
3 VCC
GND 2
MAX6461–
MAX6466
GND 2
MAX6461–
MAX6466
3 VCC
SC70-3
GND 3
4 (OUT)/OUT
SOT23-3
( ) ARE FOR THE MAX6462/MAX6465 ONLY
SOT23-5
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Ultra-Low-Power Voltage Detectors and
µP Supervisory Circuits
PIN
MAX6461–MAX6466
SOT23-3 SC70-3 SOT23-5
124
2 1 2, 3
335
——
1
Pin Description
NAME
FUNCTION
OUT
OUT
GND
VCC
N.C.
Detector Output for the MAX6461/MAX6462/MAX6463: Push-pull (active-low or
active-high) and open-drain (active-low) options. OUT is asserted low when the
monitored input (VCC) drops below the internal VTH- threshold and remains low
until the monitored input exceeds the internal VTH+ threshold. OUT is asserted
high when the monitored input (VCC) drops below the internal VTH- threshold and
remains high until the monitored input exceeds the internal VTH+ threshold. The
open-drain output OUT requires an external pullup resistor. Output for the
MAX6464/MAX6465/MAX6466: Push-pull (active-low or active-high) and open-
drain (active-low) options.
OUT is asserted low when the monitored input (VCC) drops below the internal
VTH- threshold and remains low for at least 150ms after the monitored input
exceeds the internal VTH+ threshold. OUT is asserted high when the monitored
input (VCC) drops below the internal VTH- threshold and remains high for at least
150ms after the monitored input exceeds the internal VTH+ threshold. The open-
drain output OUT requires an external pullup resistor.
Ground. In the SOT23-5 package, both pins must be grounded.
Supply Voltage and Monitored Voltage Input
No Connection
Functional Diagram
Detailed Description
The MAX6461/MAX6462/MAX6463 voltage detectors
VCC and the MAX6464/MAX6465/MAX6466 µP reset supervi-
sory circuits monitor battery, power-supply, and system
voltages from +1.6V to +5.5V. These devices consume
R1
MAX6461–
only 1µA of supply current with a 3.6V supply voltage.
MAX6466
Whenever VCC falls below the internal VTH- threshold,
the output is asserted and remains asserted until VCC
rises above VTH+ (VTH+ = VTH- × 1.05). All devices have
R2 ±2.5% threshold accuracy over temperature and offer
RESET OUTPUT
TIMEOUT STAGE
OUT
protection to short voltage transients. These devices are
ideal for low-cost and space-critical applications
because they do not require external components for
proper operation.
R3
1.23V
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAX6466.PDF ] | |
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