参数资料
| 型号： | X4645V8I-2.7A |
| 厂商： | Intersil |
| 文件页数： | 1/21页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR CPU 64K EE 8-TSSOP |
| 标准包装： | 100 |
| 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： | 2.92V |
| 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 |
?
X4643, X4645
64K, 8K x 8 Bit
Data Sheet
March 29, 2005
FN8123.0
CPU Supervisor with 64K 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
? 64Kbits 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
? 400kHz 2-wire interface
? 2.7V to 5.5V power supply operation
? Available packages
—8-lead SOIC
—8-lead TSSOP
DESCRIPTION
The X4643/5 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 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, Intersil’s unique circuits allow the threshold
to be reprogrammed to meet custom requirements or
to fine-tune the threshold for applications requiring
higher precision.
BLOCK DIAGRAM
Watchdog Transition
WP
Detector
Protect Logic
Watchdog
Timer Reset
SDA
SCL
S0
Data
Register
Command
Decode &
Control
Logic
Status
Register
EEPROM Arra y
Reset &
Watchdog
Timebase
RESET (X4643/5)
RESET (X4645)
S1
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 1-888-352-6832 | 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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| X4645V8I-4.5A | 功能描述:IC SUPERVISOR CPU 64K EE 8-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:100 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:- 复位:低有效 复位超时:最小为 100 ms 电压 - 阀值:4.38V 工作温度:0°C ~ 70°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 |
| X465106J50VDC | 制造商:ASC 功能描述: |
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