X5328, X5329
®
(Replaces X25328, X25329)
Data Sheet
October 17, 2005
FN8132.1
DESCRIPTION
CPU Supervisor with 32Kbit SPI EEPROM
These devices combine three popular functions, Power-
on Reset Control, 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.
FEATURES
• Low V detection and reset assertion
CC
—Five standard reset threshold voltages
—Re-program low V reset threshold voltage
CC
using special programming sequence
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.
—Reset signal valid to V = 1V
CC
• Long battery life with low power consumption
—<1µA max standby current
—<400µA max active current during read
• 32Kbits of EEPROM
The device’s low V
detection circuitry protects the
CC
• Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Protect 0, 1/4, 1/2 or all of EEPROM array with
user’s system from low voltage conditions by holding
RESET/RESET active when V falls below a mini-
CC
mum V trip point. RESET/RESET remains asserted
CC
™
Block Lock protection
until V
returns to proper operating level and stabi-
CC
—In circuit programmable ROM mode
• 2MHz SPI interface modes (0,0 & 1,1)
• Minimize EEPROM programming time
—32-byte page write mode
lizes. Five industry standard V
thresholds are
TRIP
available, however, Intersil’s unique circuits allow the
threshold to be reprogrammed to meet custom
requirements or to fine-tune the threshold in applica-
tions requiring higher precision.
—Self-timed write cycle
—5ms write cycle time (typical)
• 2.7V to 5.5V and 4.5V to 5.5V power supply
operation
• Available packages
—14 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP
• Pb-free plus anneal available (RoHS compliant)
BLOCK DIAGRAM
WP
Protect Logic
SI
Data
Status
Register
Register
SO
Command
Decode &
Control
SCK
CS
8Kbits
8Kbits
Logic
16Kbits
Reset
Timebase
RESET/RESET
Power-on and
Low Voltage
Reset
VCC
+
-
Generation
X5328 = RESET
X5329 = RESET
VTRIP
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. All Rights Reserved
1
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