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参数资料
| 型号： | MAX697CPE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU 16-DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 25 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 推挽式，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 35 ms |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 16-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 16-PDIP |
| 包装： | 管件 |
Microprocessor Supervisory Circuits
The MAX696 operates with battery voltages from 2.0V
to 4.25V. The battery voltage should not be within 0.5V
of V CC , or switchover may occur. High-value capaci-
tors, either standard electrolytic or the farad-size dou-
ble-layer capacitors, can also be used for short-term
memory backup. The capacitor charging voltage
should include a diode to limit the fully charged voltage
to approximately 0.5V less than V CC . The charging
resistor for rechargeable batteries should be connect-
ed to V OUT since this eliminates the discharge path that
exists if the resistor is connected to V CC .
A small leakage current of typically 10nA (20nA max)
flows out of the V BATT terminal. This current varies with
the amount of current that is drawn from V OUT , but its
polarity is such that the backup battery is always slight-
ly charged, and is never discharged while V CC is in its
operating voltage range. This extends the shelf life of
the backup battery by compensating for its self-dis-
charge current. Also note that this current poses no
problem when lithium batteries are used for backup
since the maximum current (20nA) is safe for even the
smallest lithium cells.
(MAX697) CE IN
If the battery-switchover section is not used, connect
V BATT to GND and connect V OUT to V CC . Table 2
shows the state of the inputs and output in the low-
power battery-backup mode.
Reset Output
RESET is an active-low output that goes low whenever
LL IN falls below 1.3V. It remains low until LL IN rises
above 1.312V for 50ms. (See Figures 4 and 5.)
The guaranteed minimum and maximum low-line thresh-
olds of the MAX696/MAX697 are 1.2V and 1.4V. The
LL IN comparator has approximately 12mV of hysteresis.
The response time of the reset voltage comparator is
about 100μs. LL IN should be bypassed to ensure that
glitches do not activate the RESET output.
RESET also goes low if the watchdog timer is enabled
and WDI remains either high or low longer than the
watchdog timeout period. RESET has an internal 3μA
pullup, and can either connect to an open-collector
reset bus or directly drive a CMOS gate without an
external pullup resistor.
CE OUT (MAX697)
V CC
LOW LINE
POWER-ON
RESET
RESET
LL IN
+
-
RESET
RESET
TIME
Q n
RESET
WATCHDOG
13V
FROM
WATCHDOG
TIMER
10kHz CLOCK
FROM TIMEBASE
SECTION
Figure 4. Reset Block Diagram
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX697CPE+ | 功能描述:监控电路 MPU Supervisor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX697CWE | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX697CWE+ | 功能描述:监控电路 MPU Supervisor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX697CWE+T | 功能描述:监控电路 MPU Supervisor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX697CWE-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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