参数资料
| 型号： | X4325V8I-2.7 |
| 厂商： | Intersil |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR CPU 32K EE 8-TSSOP |
| 标准包装： | 200 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 复位： | 高有效 |
| 复位超时： | 最小为 100 ms |
| 电压 - 阀值： | 2.62V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
?
X4323, X4325
32k, 4k x 8 Bit
Data Sheet
May 25, 2006
FN8122.1
CPU Supervisor with 32k EEPROM
FEATURES
? Selectable watchdog timer
? Low V CC detection and reset assertion
—Four standard reset threshold voltages
—Adjust low V CC reset threshold voltage using
special programming sequence
—Reset signal valid to V CC = 1V
? Low power CMOS
—<20μA max standby current, watchdog on
—<1μA standby current, watchdog off
—3mA active current
? 32Kbits 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 Ld SOIC
—8 Ld TSSOP
? Pb-free plus anneal available (RoHS compliant)
DESCRIPTION
The X4323, X4325 combines four popular functions,
Power-on Reset Control, Watchdog Timer, Supply Volt-
age Supervision, and 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
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 V CC detection circuitry protects the
user’s system from low voltage conditions, resetting the
system when V CC falls below the set minimum V CC trip
point. RESET/RESET is asserted until V CC returns to
proper operating level and stabilizes. Four industry
standard V TRIP 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.
BLOCK DIAGRAM
WP
Watchdog Transition
Detector
Protect Logic
Watchdog
Timer Reset
SDA
SCL
S0
S1
Data
Register
Command
Decode &
Control
Logic
Status
Register
EEPROM Arra y
Reset &
Watchdog
Timebase
RESET (X4323)
RESET (X4325)
V CC Threshold
Reset logic
V CC
V TRIP
+
-
Power-on and
Low Voltage
Reset
Generation
1
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. 2005-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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