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参数资料
| 型号： | LTC699IS8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/4页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISORY CIRCUIT MPU 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.65V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
LTC699
Microprocessor
Supervisory Circuit
FEATURE S
D ESCRIPTIO
s
s
s
s
s
s
s
s
Guaranteed Reset Assertion at V CC = 1V
1.5mA Maximum Supply Current
SO-8 Packaging
4.65V Precision Voltage Monitor
Power OK/Reset Time Delay: 200ms
Minimum External Component Count
Performance Specified Over Temperature
Superior Upgrade for MAX699
The LTC699 provides power supply monitoring for
microprocessor-based systems. The features include mi-
croprocessor reset and watchdog timing. Precise internal
voltage reference and comparator circuit monitor the
power supply line. When an out-of-tolerance condition
occurs, the R ESET output is forced to active low. In
addition, the RESET output is guaranteed to remain logic
low even with V CC as low as 1V.
An i nterna l watchdog timer is also available, which forces
A PPLICATI
S
the RESET output to active low when the watchdog input
is not toggled prior to the time-out period of 1.6 seconds.
s
s
s
s
Critical μ P Power Monitoring
Intelligent Instruments
Computers and Controllers
Automotive Systems
The LTC699 is offered in DIP and surface mount packages.
TYPICAL A PPLICATI
+5V
BLOCK D I AGRA
VCC
500k
μP POWER
RESET
V CC
RESET
LTC699
WDI
μP RESET
μP
SYSTEM
I/O LINE
1.3V
+
–
C1
RESET PULSE
GENERATOR
GND
0.1μF
GND
0.1μF
OSC
WATCHDOG
TIMER
MICROPROCESSOR RESET AND WATCHDOG TIMING IN
LTC699 TA1
WDI
TRANSITION
DETECTOR
LTC699 BD
A SINGLE CHIP FOR MICROPROCESSOR SYSTEMS.
1
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