Voltage Detectors with Watchdog Timer & Manual Reset
The XC6111 series are groups of high-precision, low current consumption voltage detectors with manual reset input function 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 XC6111 series'ICs 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).
On the XC6111 series' ICs, 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.
Moreover, since the manual reset pin is internally pulled up to theVIN pin voltage level, the ICs can be used with the manual reset pin left unconnected if the pin is unused.
The detect voltages are internally fixed 1.6V ~ 5.0V in increments of 100mV, using laser trimming technology.
Six watchdog timeout period settings are available in a range from 6.25ms to 1.6s.
Seven release delay time 1 are available in a range from 3.13ms to 1.6s.
Typical Application Circuit
|Detect Voltage Range||1.6V～5.0V±2%(0.1V increments)|
|Operating Voltage Range||1.0V～6.0V|
|Detect Voltage Temperature Characteristics||±100ppm/℃(TYP.)|
|Output Configuration||N-channel open drain or CMOS output|
|Watchdog Pin||WD pin monitors CPU. If CPU provide a signal within the watchdog timeout period, RESET signal come out.|
|Manual Reset pin||MRB pin signal input asserts forced reset|
|Release Delay Time||1.6s/400ms/200ms/100ms/50ms/25ms/3.13ms(TYP.) can be selectable|
|Watchdog Timeout Period||1.6s/400ms/200ms/100ms/50ms/6.25ms(TYP.) can be selectable|
|Package||SOT-25||Number of Pins||5|
|Pcs/Reel||3,000||Package Size(mm)||2.8 x 2.9 x 1.3|
|Package||USP-6C||Number of Pins||6|
|Pcs/Reel||3,000||Package Size(mm)||1.8 x 2.0 x 0.6|
What does the watchdog timer work?
This timer function is continuously monitoring to check whether the microcomputer is normally operating or not and give notice of any abnormal operation.