CMOS工艺手动复位控制端和看门狗功能,低功耗电压检测器

产品概述 返回TOP
CXDR7559系列是采用CMOS工艺生产的,带有手动复位控制端和看门狗（Watch Dog）功能,具有,低功耗特点的电压检测器，内部电路包括参考电压源电路,延迟电路,比较器电路和输出驱动电路。CXDR7559系列内置时间延迟电路，通过设置外部手动复位功能，可在任何条件下进行强制复位。该系列芯片提供两种形式的输出方式：VDFL和VDFH。当将芯片的WD端子悬空时，CXDR7559的看门狗功能会被关闭，此条件下，在看门狗超时前，内部计数器被清零。在芯片内部，由于手动复位端子是连接到VIN的，因此，该功能不需要使用时可以悬空。CXDR7559系列检测电压的设置可通过激光微调技术以0.1V为间隔自由选择。看门狗超时时间设置可在6.25ms～1.6s有六种选择，解除延迟时间设置在3.13ms～1.6s有七种供选择。The CXDR7559~CXDR7563, CXDR7564~CXDR7568 series are groups of high-precision, low current consumption voltage detectors with manual reset input and watchdog functions incorporating CMOS process technology. The series consist of a reference voltage source, delay circuit, comparator, and output driver. With the built-in delay circuit, the CXDR7559 ~ CXDR7563, CXDR7564 ~ CXDR7568 series do not require any external components to output signals with release delay time. Moreover, with the manual reset function, reset can be asserted at any time. The ICs produce two types of output; VDFL (low when detected) and VDFH (high when detected). With the CXDR7559 ~ CXDR7563, CXDR7564 ~ CXDR7568 series, the WD pin can be left open if the watchdog function is not used. Whenever the watchdog pin is opened, the internal counter clears before the watchdog timeout occurs. Since the manual reset pin is internally pulled up to the VIN pin voltage level, the ICs can be used by leaving the manual reset pin unconnected if the pin is unused. The detect voltages are internally fixed 1.6V ~ 5.0V in increments of 0.1V, using laser trimming technology. Six watchdog timeout periods are available in a range from 6.25ms to 1.6s. Seven release delay times are available in a range from 3.13ms to 1.6s.
产品特点 返回TOP
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应用范围 返回TOP
●Microprocessor reset circuits
●Memory battery backup circuits
●System power-on reset circuits
●Power failure detection