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LTC1985ES5-1.8 Datasheet

  • LTC1985ES5-1.8

  • Micropower Precision Triple Supply Monitor with Push-Pull Re...

  • 138.73KB

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Final Electrical Specifications
LTC1985-1.8
Micropower Precision
Triple Supply Monitor
with Push-Pull Reset Output
in a 5-Lead SOT-23 Package
March 2000
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTIO
Monitors Three Inputs Simultaneously:
3V, 1.8V and Adjustable
鹵1.5%
Threshold Accuracy Over Temperature
Very Low Supply Current: 10碌A(chǔ) Typ
200ms Reset Time Delay
Power Supply Glitch Immunity
Guaranteed RESET for V
CC3
鈮?/div>
1V or V
CC18
鈮?/div>
1V
3V Active-Low Push-Pull Reset Output
5-Lead SOT-23 Package
The LTC
廬
1985-1.8 is a triple supply monitor intended for
systems with multiple supply voltages. The reset output
remains low until all three supplies have been in compli-
ance for 200ms. Tight 1.5% accuracy specifications and
glitch immunity ensure reliable reset operation without
false triggering.
The RST output is guaranteed to be in the correct state for
V
CC18
or V
CC3
down to 1V. The LTC1985 may also be
configured to monitor any one or two V
CC
inputs instead
of three, depending on system requirements.
Very low (10碌A(chǔ) typical) supply current makes the LTC1985
ideal for power conscious systems.
The LTC1985 is available in a 5-lead SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
Desktop Computers
Notebook Computers
Intelligent Instruments
Portable Battery-Powered Equipment
Network Servers
TYPICAL APPLICATIO
DC/DC
CONVERTER
3V
1.8V
2.5V
SYSTEM
LOGIC
1
5
V
CC3
RST
LTC1985-1.8
4
0.1碌F
R1
130k
1% 3
0.1碌F
R2
100k
1%
V
CC18
V
CCA
GND
2
1985-1.8 TA01
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
U
U
1

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