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| 型号： | LTC691ISW#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC MPU SUPERVISRY CIRCUIT 16SOIC |
| 标准包装： | 47 |
| 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： | 高有效/低有效 |
| 复位超时： | 最小为 35 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： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
LTC690/LTC691
LTC694/LTC695
Microprocessor
Supervisory Circuits
Guaranteed Reset Assertion at V CC = 1V
1.5mA Maximum Supply Current
Fast (35ns Max) Onboard Gating of RAM Chip
SO-8 and S16 Packaging
4.65V Precision Voltage Monitor
Power OK/Reset Time Delay: 50ms, 200ms
Minimum External Component Count
1μA Maximum Standby Current
Voltage Monitor for Power-Fail
Thermal Limiting
Performance Specified Over Temperature
Superior Upgrade for MAX690 Family
Critical μP Power Monitoring
Intelligent Instruments
Battery-Powered Computers and Controllers
Automotive Systems
FEATURES
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Enable Signals
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or Adjustable
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or Low Battery Warning
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APPLICATIONS
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TYPICAL APPLICATION
DESCRIPTION
provides complete power supply monitoring and battery
control functions for microprocessor reset, battery back-
up, CMOS RAM write protection, power failure warning
and watchdog timing. A precise internal voltage reference
and comparator circuit monitor the power supply line.
When an out-of-tolerance condition occurs, the reset
outputs are forced to active states and the chip enable
output unconditionally write-protects external memory.
In addition, the RESET output is guaranteed to remain
logic low even with V CC as low as 1V.
The LTC690 family powers the active CMOS RAMs with a
charge pumped NMOS power switch to achieve low drop-
out and low supply current. When primary power is lost,
auxiliary power, connected to the battery input pin, powers
the RAMs in standby through an efficient PMOS switch.
For an early warning of impending power failure, the LTC690
family provides an internal comparator with a user-defined
threshold. An internal watchdog timer is also available, which
forces the reset pins to active states when the watchdog
input is not toggled prior to a preset timeout period.
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
RESET Output Voltage
vs Supply Voltage
V IN ≥ 7.5V
+
51k
10μF
LT ? 1086-5
V IN V OUT
ADJ
5V
+
100μF
0.1μF
3V
V CC V OUT
LTC690/LTC691
LTC694/LTC695
V BATT
RESET
PFO
POWER TO μP
0.1μF CMOS RAM POWER
μP
SYSTEM
μP RESET
μP NMI
5
4
3
2
T A = 25°C
EXTERNAL PULL-UP = 10μA
V BATT = 0V
PFI
GND WDI
I/O LINE
10k
0.1μF
100
690 TA01
1
MICROPROCESSOR RESET, BATTERY BACK-UP, POWER FAILURE
WARNING AND WATCHDOG TIMING ARE ALL IN A SINGLE CHIP
FOR MICROPROCESSOR SYSTEMS
0
0
1
2 3
SUPPLY VOLTAGE (V)
4
5
690 TA02
690ff
For more information www.linear.com/690
1
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| LTC692CN8 | 功能描述:IC MPU SUPERVISORY CIRCUIT 8-DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 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:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC692CN8#PBF | 功能描述:IC MPU SUPERVISORY CIRCUIT 8-DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 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:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
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