ASM1816 Datasheet, PDF (1/9 Pages) Alliance Semiconductor Corporation – Low Power 3.3V/3.0V uP Reset, Active LOW, Open-Drain Output

November 2006
rev 1.6
ASM1816
Low Power 3.3V/3.0V µP Reset, Active LOW, Open-Drain Output
General Description
Applications
The ASM1816 is a voltage supervisory device with low-power,
3.3V/3V µP Reset, active LOW, open-drain output. Maximum
supply current over temperature is a low 15µA (at 3.6V).
The ASM1816 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%, 10%, 15% and 20%. 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 150ms to allow the power supply and system
microprocessor to stabilize.
The ASM1816 is designed with a open-drain output stage and
operates over the extended industrial temperature range.
Devices are available in TO-92 and compact surface mount
SOT-23 packages.
• Set-top boxes
• Cellular phones
• PDAs
• Energy management systems
• Embedded control systems
• Printers
• Single board computers
Typical Application
V_CC
ASM1816
RESET
Microprocessor
RESET
Other low power products in this family include the ASM1810/
11/12/15/17, ASM1233D and ASM1233M.
GND
Key Features
• Low Supply Current
•20 µA maximum (5.5 V)
•15µA maximum (3.6 V)
• Automatically restarts a microprocessor after power failure
• 150ms reset delay after V_CC returns to an in-tolerance con-
dition
• Active LOW power-up reset
• Precision temperature-compensated voltage reference and
comparator
• Eliminates external components
• TO-92 and compact surface mount SOT-23 package
• Operating temperature -40°C to +85°C
Block Diagram
V_{CC 2}
Supply
Tolerance
Bias
+
-
Reference
ASM1816 5.0KΩ
Delay
150ms
Typical
3
GND
1
RESET
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200 Campbell,ACllAian9c5e0S0e8mi•coTndeul:ct4o0r8-879-9077 • Fax: [phone]
2575 Augustine Drive . Santa Clwaraw, wCA.p9u5l0s5e4c.oTreels: 4e0m8.i8.5c5o.4m900 . Fax: [phone] . www.alsc.com
Notice: The information in this document is subject to change without notice