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参数资料
| 型号： | MAX696CPE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC MPU SUPERVISORY CIRCUIT 16DIP |
| 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
PRESCALER
10.24kHz FROM INTERNAL OSCILLATOR
WATCHDOG INPUT
V CC
2.7V
Q6
OR EXTERNALLY SET FREQUENCY FROM
OSC IN PIN
+
-
HI IF WATCHDOG
INPUT IS FLOATING
WATCHDOG TIMEOUT SELECT
+
-
RESET
COUNTER
R Q10/12
R
WATCHDOG
COUNTER
Q11
Q13
Q15
WATCHDOG
TIMEOUT
SELECTOR
LOGIC
1.0V
TRANSITION
DETECTOR
GOES HIGH AT THE
END OF WATCHDOG
TIMEOUT PERIOD
FOR EACH TRANSITION
S
R
S
Q
R
S
LOW LINE
(HI IF LL IN < 1.3V)
RESET
FLIP FLOP
Q Q
LONG/SHORT
FF
R
LOW
LINE
WATCHDOG
FAULT FF
Q
RESET
RESET
WATCHDOG OUTPUT
Figure 6. Watchdog Timer Block Diagram
becomes effective following the first transition of WDI
after RESET has gone high. The watchdog timer is
restarted at the end of reset, whether the reset was
caused by lack of activity on WDI or by LL IN falling
below 1.3V. If WDI remains either high or low, reset puls-
es will be issued every 1.6s. The watchdog monitor can
be deactivated by floating the watchdog input (WDI).
The watchdog output ( WDO ) goes low if the watchdog
timer times out, and it remains low until set high by the
next transition on the watchdog input. WDO is also set
high when LL IN goes below 1.3V.
The watchdog timeout period defaults to 1.6s and the
reset pulse width defaults to 50ms. The MAX696 and
MAX697 allow these times to be adjusted per Table 1.
The internal oscillator is enabled when OSC SEL is high
or floating. In this mode, OSC IN selects between the 1.6s
and 100ms watchdog timeout periods. In either case,
immediately after a reset, the timeout period is 1.6s. This
gives the microprocessor time to reinitialize the system.
WD transmissions while RESET is low are ignored. If OSC
IN is low, then the 100ms watchdog period becomes
effective after the first transition of WDI. The software
should be written so the I/O port driving WDI is left in its
power-up reset state until the initialization routines are
completed and the microprocessor is able to toggle WDI
at the minimum 70ms watchdog timeout period.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX696CPE+ | 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 |
| MAX696CWE | 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 |
| MAX696CWE+ | 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 |
| MAX696CWE+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 |
| MAX696CWE-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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