鈥?/div>
Set-top boxes
Cellular phones
PDAs
Energy management systems
Embedded control systems
Printers
Single board computers
General Description
The ASM1233M is a voltage supervisor with low-power, 5V 碌P
Reset, with an active LOW, open-drain output. Maximum supply
current over temperature is a low 20碌A.
The ASM1233M generates an active LOW reset signal
whenever the monitored supply is out of tolerance. A precision
reference and comparator circuit monitor power supply (V
CC
)
level. Tolerance level options are 5% ,and 10% for a 5V power
supply. The tolerance is 15% for the 3.3V, ASM1233M. When
an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces an active LOW reset signal.
After V
CC
returns to an in-tolerance condition, the reset signal
remains active for 350ms to allow the power supply and system
microprocessor to stabilize.
Typical Operating Circuit
V
CC
ASM1233M
The ASM1233M is designed with a open-drain output stage and
operates over the extended industrial temperature range.
Devices are available in compact surface mount SO-8
packages and 3-lead TO-92 packages.
Other low power products in this family include the ASM1810/
11/12/15/16/17 and ASM1233D.
RESET
RESET
Microprocessor
GND
Key Features
鈥?/div>
Low Supply Current
鈥?0 碌A maximum (5.5 V)
鈥?5碌A maximum (3.6 V)
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Automatically restarts a microprocessor after power failure
350ms reset delay after V
CC
returns to an in-tolerance con-
dition
Active LOW power-up reset, 5k鈩?internal pull-up
Precision temperature-compensated voltage reference and
comparator
Eliminates external components
Low-cost TO-92 package
Compact surface mount SO-8 package
Operating temperature -40擄C to +85擄C
Reference
Supply
Tolerance
Bias
Block Diagram
V
CC
2
ASM1233M
5.0k鈩?/div>
1
+
RESET
Delay
150ms
Typical
-
GND
4
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
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