參數(shù)資料
型號(hào)： X4165V8-2.7
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
封裝： PLASTIC, TSSOP-8
文件頁數(shù)： 1/22頁
文件大?。?/td> 496K
代理商： X4165V8-2.7
REV 1.32 5/27/04
Characteristics subject to change without notice.
1 of 22
www.xicor.com
16K
X4163/5
2K x 8 Bit
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
—<20A max standby current, watchdog on
—<1A 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
—8-lead SOIC
—8-lead TSSOP
DESCRIPTION
The X4163/5 combines four popular functions, Power-on
Reset Control, Watchdog Timer, Supply Voltage
Supervision, and Serial EEPROM Memory in one
package. This
combination
lowers
system
cost,
reduces board space requirements, and increases reli-
ability.
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 stan-
dard VTRIP thresholds are available, however, Xicor’s
unique circuits allow the threshold to be reprogrammed
to meet custom requirements or to ne-tune the thresh-
old for applications requiring higher precision.
BLOCK DIAGRAM
Watchdog
Timer Reset
Data
Register
Command
Decode &
Control
Logic
SDA
SCL
VCC
Reset &
Watchdog
Timebase
Power on and
Generation
VTRIP
+
-
RESET (X4163)
Reset
Low Voltage
Status
Register
Protect Logic
EEPROM Array
Watchdog Transition
Detector
WP
VCC Threshold
Reset logic
Bloc
k
Loc
k
Control
2Kb
RESET (X4165)
S0
S1
相關(guān)PDF資料
PDF描述
X4165S8-4.5A 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
X5001S8-1.8 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
X5043V14I-2.7A 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14
X5045M8I-4.5A 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
X5043S8T1 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
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