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Intersil Corporation - (X40020 / X40021) Dual Voltage Monitor

Numéro de référence X40021
Description (X40020 / X40021) Dual Voltage Monitor
Fabricant Intersil Corporation 
Logo Intersil Corporation 





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X40021 fiche technique
®
Data Sheet
X40020, X40021
May 17, 2006
FN8112.1
Dual Voltage Monitor with Integrated CPU
Supervisor and System Battery Switch
FEATURES
• Dual voltage detection and reset assertion
—Three standard reset threshold settings
(4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V)
VATdRjuIPs2t
programmable down to 0.9V
low voltage reset threshold voltages
using special programming sequence
MReosneittosrigtwnoalvvoalltiadgteosVoCrCd=et1eVct
power
fail
• Battery switch backup
FVaOuUlTt:d5emteActtioon50rmegAisftreorm VCC; 250µA from VBATT
• Selectable power-on reset timeout
(0.05s, 0.2s, 0.4s, 0.8s)
• Selectable watchdog timer interval
(25ms, 200ms, 1.4s, off)
• Debounced manual reset input
• Low power CMOS
—25µA typical standby current, watchdog on
—6µA typical standby current, watchdog off
—1µA battery current in backup mode
• 400kHz 2-wire interface
www.DataSheet4U.com 2.7V to 5.5V power supply operation
• Available packages
—14-lead SOIC, TSSOP
• Monitor voltages: 5V to 1.6V
• Memory security
• Pb-free plus anneal available (RoHS compliant)
APPLICATIONS
• Communications equipment
—Routers, hubs, switches
—Disk arrays
• Industrial systems
—Process control
—Intelligent instrumentation
• Computer systems
—Desktop computers
—Network servers
X40020, X40021
Standard VTRIP1 Level Standard VTRIP2, Level
4.6V (±1%)
2.9V(±1.7%)
4.6V (±1%)
2.6V (±2%)
2.9V(±1.7%)
1.6V (±3%)
See “Ordering Information” for more details
For Custom Settings, call Intersil.
Suffix
-A
-B
-C
DESCRIPTION
The X40020 combines power-on reset control, watch-
dog timer, supply voltage supervision, and secondary
supervision, and manual reset, in one package. This
combination lowers system cost, reduces board space
requirements, and increases reliability.
Applying voltage to VCC activates the power-on reset
circuit which holds RESET/RESET active for a period of
time. This allows the power supply and system oscilla-
tor to stabilize before the processor can execute code.
BLOCK DIAGRAM
V2MON
SDA
WP
SCL
VCC
(V1MON)
BATT-ON
VOUT
VBATT
Data
Register
Command
Decode Test
& Control
Logic
System
Battery
Switch
V2LMogoincitor
VOUT
+
- VTRIP2
Fault Detection
Register
Status
Register
Watchdog
and
Reset Logic
VOUT
VCCLMogoicnitor
VOUT
+
VTRIP1
-
Power-on,
Manual Reset
Low Voltage
Reset
Generation
V2FAIL
WDO
MR
RESET
X40020
RESET
X40021
LOWLINE
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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