X5328 Datasheet, PDF (1/21 Pages) Intersil Corporation – CPU Supervisor with 32Kbit SPI EEPROM

®
Data Sheet
X5328, X5329
(Replaces X25328, X25329)
October 17, 2005
FN8132.1
CPU Supervisor with 32Kbit SPI EEPROM
FEATURES
• Low V_CC detection and reset assertion
—Five standard reset threshold voltages
—Re-program low V_CC reset threshold voltage
using special programming sequence
—Reset signal valid to V_CC = 1V
• Long battery life with low power consumption
—<1µA max standby current
—<400µA max active current during read
• 32Kbits of EEPROM
• Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Protect 0, 1/4, 1/2 or all of EEPROM array with
Block Lock^™ protection
—In circuit programmable ROM mode
• 2MHz SPI interface modes (0,0 & 1,1)
• Minimize EEPROM programming time
—32-byte page write mode
—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
SI
SO
SCK
CS
Data
Register
Command
Decode &
Control
Logic
DESCRIPTION
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.
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 device’s low V_CC detection circuitry protects the
user’s system from low voltage conditions by holding
RESET/RESET active when V_CC falls below a mini-
mum V_CC trip point. RESET/RESET remains asserted
until V_CC returns to proper operating level and stabi-
lizes. Five industry standard V_TRIP thresholds are
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.
Protect Logic
Status
Register
8Kbits
8Kbits
16Kbits
V_CC
+
V_TRIP
-
Reset
Timebase
Power-on and
Low Voltage
Reset
Generation
RESET/RESET
X5328 = RESET
X5329 = RESET
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2005. All Rights Reserved
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