X5323 INTERSIL [Intersil Corporation], X5323 Datasheet
X5323
Manufacturer Part Number
X5323
Description
CPU Supervisor with 32Kb SPI EEPROM
Manufacturer
INTERSIL [Intersil Corporation]
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CPU Supervisor with 32Kb SPI EEPROM
FEATURES
• Selectable watchdog timer
• Low V
• Determine watchdog or low voltage reset with a
• Long battery life with low power consumption
• 32Kbits of EEPROM
• Built-in inadvertent write protection
• 2MHz SPI interface modes (0,0 & 1,1)
• Minimize EEPROM programming time
• 2.7V to 5.5V and 4.5V to 5.5V power supply
• Available packages
• Pb-free plus anneal available (RoHS compliant)
BLOCK DIAGRAM
CS/WDI
—Five standard reset threshold voltages
—Re-program low V
—Reset signal valid to V
volatile flag bit
—<50µA max standby current, watchdog on
—<1µA max standby current, watchdog off
—<400µA max active current during read
—Power-up/power-down protection circuitry
—Protect 0, 1/4, 1/2 or all of EEPROM array with
—In circuit programmable ROM mode
—32-byte page write mode
—Self-timed write cycle
—5ms write cycle time (typical)
operation
—14 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP
V
using special programming sequence
Block Lock
SCK
CC
SO
WP
SI
CC
detection and reset assertion
™
protection
V
CC
CC
Reset Logic
®
Command
Decode &
Register
Control
Threshold
Logic
1
reset threshold voltage
Data
CC
= 1V
Data Sheet
Watchdog Transition
V
Detector
TRIP
1-888-INTERSIL or 1-888-468-3774
Protect Logic
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Register
8Kbits
8Kbits
16Kbits
Status
+
-
DESCRIPTION
These devices combine four popular functions, Power-on
Reset Control, Watchdog Timer, Supply Voltage
Supervision, and Block Lock Protect Serial EEPROM
Memory in one package. 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 protec-
tion mechanism for microcontrollers. When the micro-
controller fails to restart a timer within a selectable
time
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 V
user’s system from low voltage conditions, resetting the
system when V
point. RESET/RESET is asserted until V
proper operating level and stabilizes. Five industry stan-
dard V
unique circuits allow the threshold to be reprogrammed
to meet custom requirements or to fine-tune the thresh-
old for applications requiring higher precision.
October 27, 2005
TRIP
out
Power-on and
All other trademarks mentioned are the property of their respective owners.
Timer Reset
Low Voltage
Watchdog
Generation
Watchdog
Timebase
Reset &
|
Reset
Intersil (and design) is a registered trademark of Intersil Americas Inc.
thresholds are available, however, Intersil’s
interval,
CC
(Replaces X25323, X25325)
Copyright Intersil Americas Inc. 2005. All Rights Reserved
falls below the minimum V
CC
detection circuitry protects the
the
X5323, X5325
device
RESET/RESET
X5323 = RESET
X5325 = RESET
activates
CC
FN8131.1
returns to
CC
the
trip
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