X4003 Datasheet: (X4003 / X4005) CPU Supervisor





X4003 (X4003 / X4005) CPU Supervisor Datasheet

Part Number X4003
Description (X4003 / X4005) CPU Supervisor
Manufacture Intersil Corporation
Total Page 18 Pages
PDF Download Download X4003 Datasheet PDF

Features: ® X4003, X4005 Data Sheet May 11, 2006 FN8113.1 CPU Supervisor FEATURES • Selectable watchdog timer —Select 200 ms, 600ms, 1.4s, off • Low VCC detect ion and reset assertion —Five standar d reset threshold voltages nominal 4.62 V, 4.38V, 2.92V, 2.68V, 1.75V —Adjust low VCC reset threshold voltage using special programming sequence —Reset s ignal valid to VCC = 1V • Low power C MOS —12µA typical standby current, w atchdog on —800nA typical standby cur rent watchdog off —3mA active current • 400kHz I2C interface • 1.8V to 5 .5V power supply operation • Availabl e packages —8 Ld SOIC —8 Ld MSOP Pb-free plus anneal available (RoHS c ompliant) www.DataSheet4U.com DESCRIPT ION These devices combine three popular functions, Power-on Reset Control, Wat chdog Timer, and Supply Voltage Supervi sion. This combination lowers system co st, reduces board space requirements, a nd increases reliability. Applying powe r to the device activates the power-on reset circuit which holds RESET/RESET active for a period .

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®
Data Sheet
X4003, X4005
May 11, 2006
FN8113.1
CPU Supervisor
FEATURES
• Selectable watchdog timer
—Select 200ms, 600ms, 1.4s, off
• Low VCC detection and reset assertion
—Five standard reset threshold voltages
nominal 4.62V, 4.38V, 2.92V, 2.68V, 1.75V
—Adjust low VCC reset threshold voltage using
special programming sequence
—Reset signal valid to VCC = 1V
• Low power CMOS
—12µA typical standby current, watchdog on
—800nA typical standby current watchdog off
—3mA active current
• 400kHz I2C interface
• 1.8V to 5.5V power supply operation
• Available packages
—8 Ld SOIC
—8 Ld MSOP
• Pb-free plus anneal available (RoHS compliant)
www.DataSheet4U.com
BLOCK DIAGRAM
WP
SDA
SCL
VCC
Watchdog Transition
Detector
Data
Register
Command
Decode &
Control
Logic
VCC Threshold
Reset logic
Control
Register
VTRIP
+
-
DESCRIPTION
These devices combine three popular functions,
Power-on Reset Control, Watchdog Timer, and Supply
Voltage Supervision. This combination lowers system
cost, reduces board space requirements, and
increases reliability.
Applying power to the device activates the power-on
reset circuit which holds RESET/RESET active for a
period of time. This allows the power supply and oscilla-
tor to stabilize before the processor can execute code.
The Watchdog Timer provides an independent
protection mechanism for microcontrollers. When the
microcontroller fails to restart a timer within a select-
able time out interval, the device activates the
RESET/RESET signal. The user selects the interval
from three preset values. Once selected, the interval
does not change, even after cycling the power.
The device’s low VCC detection circuitry protects the
user’s system from low voltage conditions, resetting the
system when VCC falls below the minimum VCC trip
point. RESET/RESET is asserted until VCC returns to
proper operating level and stabilizes. Five industry stan-
dard VTRIP thresholds are available; however, Intersil’s
unique circuits allow the threshold to be reprogrammed
to meet custom requirements, or to fine-tune the thresh-
old for applications requiring higher precision.
Watchdog
Timer Reset
Reset &
Watchdog
Timebase
Power-on and
Low Voltage
Reset
Generation
RESET (X4003)
RESET (X4005)
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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