参数资料
| 型号： | DS1232SN |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/7页 |
| 文件大小： | 0K |
| 描述： | IC MICRO MONITOR IND 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 45 |
| 系列： | MicroMonitor™ |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 4.37V，4.62V |
| 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 W |
| 包装： | 管件 |
DS1232/DS1232S
The second function the DS1232 performs is pushbutton reset control. The DS1232 debounces the
pushbutton input and guarantees an active reset pulse width of 250 ms minimum. The third function is a
watchdog timer. The DS1232 has an internal timer that forces the reset signals to the active state if the
strobe input is not driven low prior to timeout. The watchdog timer function can be set to operate on
timeout settings of approximately 150 ms, 600 ms, and 1.2 seconds.
OPERATION - POWER MONITOR
The DS1232 detects out-of-tolerance power supply conditions and warns a processor-based system of
impending power failure. When V CC falls below a preset level as defined by TOL (Pin 3), the V CC
comparator outputs the signals RST (Pin 5) and RST (Pin 6). When TOL is connected to ground, the RST
and RST signals become active as V CC falls below 4.75 volts. When TOL is connected to V CC , the RST
and RST signals become active as V CC falls below 4.5 volts. The RST and RST are excellent control
signals for a microprocessor, as processing is stopped at the last possible moments of valid V CC . On
power-up, RST and RST are kept active for a minimum of 250 ms to allow the power supply and
processor to stabilize.
OPERATION - PUSHBUTTON RESET
The DS1232 provides an input pin for direct connection to a pushbutton (Figure 2). The pushbutton r ese t
input requires an active low signal. Internally, this input is debounced and timed such that RST and RST
signals of at least 250 ms minimum are generated. The 250 ms delay starts as the pushbutton reset input is
released from low level.
OPERATION - WATCHDOG TIMER
A watchdog timer function forces RST and RST signals to the active state when the ST input is not
stimulated for a predetermined time period. The time period is set by the TD input to be typically 150 ms
with TD connected to ground, 600 ms with TD left unconnected, and 1.2 seconds with TD connected to
V CC . The watchdog timer starts timing out from the set time period as soon as RST and RST are inactive.
If a high-to-low transition occurs on the ST input pin prior to timeout, the watchdog timer is reset and
begins to timeout again. If the watchdog timer is allowed to timeout, then the RST and RST signals are
driven to the active state for 250 ms minimum. The ST input can be derived from microprocessor
address signals, data signals, and/or control signals. When the microprocessor is functioning normally,
these signals would, as a matter of routine, cause the watchdog to be reset prior to timeout. To guarantee
that the watchdog timer does not timeout, a high-to-low transition must occur at or less than the minimum
shown in Table 1. A typical circuit example is shown in Figure 3.
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相关PDF资料 |
PDF描述 |
|---|---|
| DS1233AZ-15/T&R | IC ECONORESET 3.3V 15% SOT-223 |
| DS1233D-5+ | IC ECONORESET NO PBR 5% TO92-3 |
| DS1233MS-5/T&R | IC ECONORESET 5V(MC33164)8-SOIC |
| DS1233Z-10/TR/C16 | IC ECONORESET 5V 10% SOT-223-3 |
| DS1236AS-10+T&R | IC MICROMANAGER 10% 16-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1232SN/T&R | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC MICRO MONITOR LP IND 16-SOIC 制造商:Maxim Integrated Products 功能描述:Supervisory Circuits MicroMonitor Chip |
| DS1232SN/T&R | 功能描述:监控电路 MicroMonitor Chip 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 |
| DS1232SN+ | 功能描述:监控电路 MicroMonitor Chip 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 |
| DS1232SN+T&R | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.62V 500UA 16SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MICRO MONITOR IND 16-SOIC 制造商:Maxim Integrated Products 功能描述:Supervisory Circuits MicroMonitor Chip |
| DS1232SN+T&R | 功能描述:监控电路 MicroMonitor Chip 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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