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CAT859 Datasheet(PDF) 1 Page - ON Semiconductor

No. de pieza CAT859
Descripción Electrónicos  3-Pin Microprocessor Power Supply Supervisors
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
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CAT859 Datasheet(HTML) 1 Page - ON Semiconductor

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CAT853, CAT863
CATCAT859, CAT869
© 2009 SCILLC. All rights reserved.
1
Doc. No. MD-3026, Rev. G
Characteristics subject to change without notice
3-Pin Microprocessor Power Supply Supervisors
FEATURES
Precision monitoring of +3.3 V (-5%, -10%), 5 V
(-10% Power Supplies)
Active low reset output
Reset valid down to VCC = 1.0 V
6 µA power supply current
Power supply transient immunity
Industrial temperature range: -40ºC to +85ºC
RoHS-compliant SOT-23 package
APPLICATIONS
Computers
Servers
Laptops
Cable modems
Wireless communications
Embedded control systems
White goods
Power meters
Intelligent instruments
PDAs and handheld equipment
DESCRIPTION
The CAT853, CAT863, CAT859, and CAT869 are
supervisory circuits that monitor power supplies in
digital systems.
These devices generate a reset signal, which is
asserted while the power supply voltage is below a
preset threshold level and for at least 140 ms after the
power supply level has risen above that level. Industry
standard threshold levels are offered to support
+3.3 V or 5.0 V systems.
The CAT859 and CAT869 feature a RESET
¯¯¯¯¯¯ push-pull
output (active low) for the two pinout options.
The CAT853 and CAT863 feature an open drain
RESET
¯¯¯¯¯¯ output (active low). Both require a pull-up
resistor on the RESET output.
Fast transients on the power supply are ignored and
the output is guaranteed to be in the correct state at
VCC levels as low as 1.0 V.
For Ordering Information details, see page 9.
PIN CONFIGURATION
SOT-23 3-Lead
SOT-23 3-Lead
2
CAT853
CAT859
GND
RESET
VCC
1
3
CAT863
CAT869
GND
RESET
VCC
1
2
3
THRESHOLD SUFFIX SELECTOR
Nominal Threshold
Voltage
Threshold Suffix
Designation
4.38 V
M
4.20 V
F
3.08 V
T
2.93 V
S
2.4 V
C
PIN DESCRIPTION
Pin Name
Function
RESET
¯¯¯¯¯¯
Active low reset. RESET
¯¯¯¯¯¯ is asserted if VCC falls below the reset threshold and remains low for at
least 140 ms after VCC rises above the reset threshold
GND
Ground
VCC
Power supply voltage that is monitored


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