3.3V EconoReset
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DS1815 3.3V EconoReset with Push-Pull Output
FEATURES
§ Automatically restarts a microprocessor after...
Description
www.maxim-ic.com
DS1815 3.3V EconoReset with Push-Pull Output
FEATURES
§ Automatically restarts a microprocessor after power failure
§ Maintains reset for 150ms after VCC returns to an in-tolerance condition
§ Reduces need for discrete components § Precision temperature-compensated voltage
reference and voltage sensor
§ Accurate 5%, 10% or 20% power monitoring § Low-cost TO-92 or space saving surface-
mount SOT-23 packages available
§ Push-pull output for low current operation
§ Operating temperature -40°C to +85°C
PIN ASSIGNMENT
DALLAS DS1815 Econo Reset
3
123
123
BOTTOM VIEW TO-92 PACKAGE
See Mech. Drawings Section
On Website
12
TOP VIEW SOT-23 PACKAGE
See Mech. Drawings Section
On Website
PIN DESCRIPTION
TO-92
1 RST 2 VCC 3 GND
Active Low Reset Output Power Supply Ground
SOT-23
1 RST 2 VCC 3 GND
Active Low Reset Output Power Supply Ground
DESCRIPTION
The DS1815 EconoReset uses a precision temperature reference and comparator circuit to monitor the status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for approximately 150ms to allow the power supply and processor to stabilize.
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041002
DS1815
OPERATION — POWER MONITOR
The DS1815 provides the functions of detecting out-of-tolerance power supply conditions and warning a processor-based system of impending...
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