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CM3403

California Micro Devices
Part Number CM3403
Manufacturer California Micro Devices
Description Micropower Supply Voltage Supervisor
Published Jun 18, 2005
Detailed Description CM3403 Micropower Supply Voltage Supervisor (SVS) Features • • • • • • • • • • Precision voltage sensor Two threshold op...
Datasheet PDF File CM3403 PDF File

CM3403
CM3403

Overview
CM3403 Micropower Supply Voltage Supervisor (SVS) Features • • • • • • • • • • Precision voltage sensor Two threshold options: 2.
93V or 4.
63V Stable over temperature Valid output logic while VCC = 0V.
Power-on reset pulse width of 140ms (min.
) to 460ms (max.
) Low quiescent current (40µA typ.
) No external components required 3-pin SOT23 package "809" compatible pinout Lead-free versions available Product Description The CM3403 is a micropower low voltage supply supervisor designed to provide the necessary poweron reset control for microprocessors and memory applications.
An internal pull-down resistor on the RESET output ensures the output remains valid under all supply conditions.
During either a cold-start power-up or a complete power-down sequence, the RESET output will remain at 0V while the VCC input voltage is between the threshold level and ground.
When the VCC input exceeds the preset threshold voltage, an internal timer is triggered and the RESET output remains active for a minimum of 140ms, at which point the output is taken inactive.
In the event of a "brown-out" condition and the VCC voltage collapses below the threshold the RESET output is immediately asserted.
Both the trigger threshold and the precision delay pulse are internally controlled eliminating the requirement for external components.
The CM3403 is housed in a 3-pin SOT23 package and is available with optional lead-free finishing.
Applications • • • Critical µP and µC power monitoring PCI applications Memory integrity during "brownouts" Typical Application Circuit Simplified Electrical Schematic VIN CM3403 VCC Microprocessor VCC + RESET GND RESET GND GND Rising Edge Delay RESET RPULLDOWN VCC Threshold Reference © 2004 California Micro Devices Corp.
All rights reserved.
10/29/04 430 N.
McCarthy Blvd.
, Milpitas, CA 95035-5112 ● Tel: 408.
263.
3214 ● Fax: 408.
263.
7846 ● www.
calmicro.
com 1 CM3403 PACKAGE / PINOUT DIAGRAM Top View GND 1 17xx RESET 2 3 VCC 3-pin SOT23 Note:...


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