X4163 Datasheet: (X4163 / X4165) CPU Supervisor





X4163 (X4163 / X4165) CPU Supervisor Datasheet

Part Number X4163
Description (X4163 / X4165) CPU Supervisor
Manufacture Intersil Corporation
Total Page 21 Pages
PDF Download Download X4163 Datasheet PDF

Features: ® X4163, X4165 16K, 2K x 8 Bit Data Sh eet April 13, 2005 FN8120.0 CPU Superv isor with 16K EEPROM FEATURES • Selec table watchdog timer • Low VCC detect ion and reset assertion —Four standar d reset threshold voltages —Adjust lo w VCC reset threshold voltage using spe cial programming sequence —Reset sign al valid to VCC = 1V • Low power CMOS —<20µA max standby current, watchdo g on —<1µA standby current, watchdog OFF —3mA active current • 16Kbits of EEPROM —64-byte page write mode Self-timed write cycle —5ms write cy cle time (typical) • Built-in inadver tent write protection —Power-up/power -down protection circuitry —Block Loc k (1, 2, 4, 8 pages, all, none) • 400 kHz 2-wire interface • 2.7V to 5.5V p ower supply operation • Available Pac kages www.DataSheet4U.com —8-lead SOI C —8-lead TSSOP DESCRIPTION The X416 3/5 combines four popular functions, Po weron Reset Control, Watchdog Timer, Su pply Voltage Supervision, and Serial EEPROM Memory in one package. This combination lowers system cost, redu.

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®
Data Sheet
April 13, 2005
X4163, X4165
16K, 2K x 8 Bit
FN8120.0
CPU Supervisor with 16K EEPROM
FEATURES
• Selectable watchdog timer
• Low VCC detection and reset assertion
—Four standard reset threshold voltages
—Adjust low VCC reset threshold voltage using
special programming sequence
—Reset signal valid to VCC = 1V
• Low power CMOS
—<20µA max standby current, watchdog on
—<1µA standby current, watchdog OFF
—3mA active current
• 16Kbits of EEPROM
—64-byte page write mode
—Self-timed write cycle
—5ms write cycle time (typical)
• Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Block Lock (1, 2, 4, 8 pages, all, none)
• 400kHz 2-wire interface
• 2.7V to 5.5V power supply operation
• Available Packages
www.DataSheet4U.com — 8-lead SOIC
—8-lead TSSOP
BLOCK DIAGRAM
DESCRIPTION
The X4163/5 combines four popular functions, Power-
on Reset Control, Watchdog Timer, Supply Voltage
Supervision, and Serial EEPROM Memory in one pack-
age. 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 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 set minimum VCC trip
point. RESET/RESET is asserted until VCC returns to
proper operating level and stabilizes. Four industry
standard VTRIP thresholds are available, however, Inter-
sil’s unique circuits allow the threshold to be repro-
grammed to meet custom requirements or to fine-tune
the threshold for applications requiring higher precision.
WP
SDA
SCL
S0
S1
VCC
Watchdog Transition
Detector
Data
Register
Command
Decode &
Control
Logic
VCC Threshold
Reset logic
Protect Logic
Status
Register
EEPROM Array
VTRIP
+
-
Watchdog
Timer Reset
Reset &
Watchdog
Timebase
Power on and
Low Voltage
Reset
Generation
RESET (X4163)
RESET (X4165)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

                    
                    






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