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X4003S8IZ Datasheet(PDF) 1 Page - Intersil Corporation

Part # X4003S8IZ
Description  CPU Supervisor
Download  16 Pages
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

X4003S8IZ Datasheet(HTML) 1 Page - Intersil Corporation

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1
FN8113.2
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, 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
X4003, X4005
CPU Supervisor
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 oscillator 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 selectable 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 standard VTRIP
thresholds are available; however, Intersil’s unique circuits
allow the threshold to be reprogrammed to meet custom
requirements, or to fine-tune the threshold for applications
requiring higher precision.
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 available (RoHS compliant)
Pinout
X4003, X4005
(8 LD SOIC, MSOP)
TOP VIEW
Block Diagram
NC
VSS
VCC
SDA
SCL
3
2
4
1
6
7
5
8
NC
WP
RESET/RESET*
*RESET APPLIES TO X4003
RESET APPLIES TO X4005
DATA
REGISTER
COMMAND
DECODE AND
CONTROL
LOGIC
SDA
SCL
VCC
RESET AND
WATCHDOG
TIMEBASE
POWER-ON AND
GENERATION
+
-
RESET (X4003)
RESET
LOW VOLTAGE
CONTROL
REGISTER
WATCHDOG TRANSITION
DETECTOR
WP
VCC THRESHOLD
RESET LOGIC
RESET (X4005)
VTRIP
WATCHDOG
TIMER RESET
Data Sheet
June 30, 2008
NOT REC
OMMEND
ED FOR N
EW DESI
GNS
NO RECO
MMENDE
D REPLA
CEMENT
contact o
ur Techni
cal Suppo
rt Center
at
1-888-INT
ERSIL or
www.inte
rsil.com/t
sc


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