AMS803/09/10
Features
Precision supply-voltage monitor
-
-
-
-
-
-
4.63V (AMS803/09/10L)
4.26V (AMS803/09/10M)
3.08V (AMS803/09/10T)
2.93V (AMS803/09/10S)
2.63V (AMS803/09/10R)
2.32V (AMS803/09/10Z)
Description
The AMS803/09/10
are microprocessor (µP)
supervisory circuits used to monitor the power supplies
in µP and digital systems. They provide excellent circuit
reliability and low cost by eliminating external
components and adjustments when used with +3.3V,
+3.0V, or 2.5V powered circuits.
These circuits perform a single function: they assert
a reset signal whenever the VCC supply voltage declines
Configurations
for
below a preset threshold, keeping it asserted for at least
140ms after VCC has risen above the reset threshold.
RESET
Output
Configurations
for
Reset thresholds suitable for operation with a variety of
supply voltages are available.
/RESET
output
configuration
for
The AMS803 has
while the AMS809/10
an
have
open-drain output stage,
push-pull outputs. The
140ms(min) reset pulse width
Push-Pull
AMS809
Push-Pull
AMS810
Open-Drain
AMS803
12µA Supply Current
Guaranteed Reset(/Reset) Valid to V
CC
= +1.0V
Power Supply Transient Immunity
No External Components
/RESET
Output
AMS803’s open-drain /Reset output requires a pull-up
resistor that can be connected to a voltage higher than
V
CC
. The AMS803/09
have an active-low
/RESET
Ordering Information
Part Number
AMS803XTE
AMS809XTE
AMS810XTE
Package
Lead free and Green SOT23-3
Lead free and Green SOT23-3
Lead free and Green SOT23-3
output while the AMS810 has an active-high RESET
output. The reset comparator is designed to ignore fast
transients on V
CC
, and the outputs are guaranteed to be
in the correct logic state for V
CC
down to 1V.
Low supply current makes
the
AMS803/09/10
Note:
“x” refers to voltage range, see below table.
ideal for use in portable equipment. The ICs are
available in 3 pin SOT23 packages.
Suffix: X—Monitored Voltage
X
L
Reset Threshold (V)
4.63
M
4.26
T
3.08
S
2.93
R
2.63
Z
2.32
Block Diagram
V
CC
V
RST
+
-
Reset Logic
and Timer
RESET
Advanced Monolithic Systems
1
http://www.ams-semitech.com
AMS [ Advanced Monolithic Systems Ltd ]
