参数资料
| 型号： | DS1238A-5 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | IC MICROMANAGER 5% 16-DIP |
| 标准包装： | 25 |
| 系列： | MicroManager |
| 类型： | 备用电池电路 |
| 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 40 ms |
| 电压 - 阀值： | 4.62V |
| 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 |
DS1238
POWER SWITCHING Figure 9
Note: If freshness on the DS1238 is not used,
PF
on the DS1336 may be tied to OUT1. This will free IN4, OUT4,
and V BAT01 for system use.
TIMING DIAGRAMS
This section provides a description of the timing diagrams shown in Figure 10 and Figure 11. Figure 10
illustrates the relationship for power down. As V CC falls, the IN pin voltage drops below V TP . As a result,
the processor is notified of an impending power failure via an active NMI . This gives the processor time
to save critical data in nonvolatile SRAM. As the power falls further, V CC crosses V CCTP , the power
monitor trip point. When V CC reaches V CCTP , and active RST and RST are given. At this time, CEO is
brought high to write-protect the RAM. When the V CC reaches V BAT , a power-fail is issued via the PF pin.
Figure 11 shows the power-up sequence. As V CC slews above V BAT , the PF pin is deactivated. An active
reset occurs as well as an NMI . Although the NMI may be short due to slew rates, reset will be
maintained for the standard t RPU timeout period . At a later time, if the IN pin falls below V TP , a new NMI
will occur. If the processor does not issue an ST , a watchdog reset will also occur. The second NMI and
RST are provided to illustrate these possibilities.
9 of 14
相关PDF资料 |
PDF描述 |
|---|---|
| DS1238A-10 | IC MICROMANAGER 10% 16-DIP |
| MAX6316LUK36DY-T | IC MPU/RESET CIRC 3.60V SOT23-5 |
| MAX6316LUK29CZ-T | IC MPU/RESET CIRC 2.93V SOT23-5 |
| RMC30DRTI-S13 | CONN EDGECARD 60POS .100 EXTEND |
| MAX6316LUK29CY-T | IC MPU/RESET CIRC 2.93V SOT23-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST16C650AIP40 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.90V TO 5.5V UART WITH 32-BYTE FIFO |
| ST16C650AIQ48 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:UART, 48 Pin, Plastic, TQFP |
| ST16C650AIQ48-F | 功能描述:UART 接口集成电路 UART W/32BYTEFIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| ST16C650AIQ48TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| ST16C650AIQ48TR-F | 功能描述:UART 接口集成电路 UART W/32BYTEFIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。