(Hong Kong)
Product Summary
The RTC72421A is a 4-bit real time clock module.
Parametrics
RTC72421A absolute maximum ratings: (1)On the condition of Ta=25℃, power source voltage VDD: -0.3 to 7.0V; (2)On the condition of Ta=25℃, input and output voltage VI/O: GND-0.3 to VDD+0.3 V; (3)Storage temperature Tstg: -55 to +85℃; (4)Soldering condition Tsol: under 260℃ within 10 sec.
Features
RTC72421A features: (1)The built-in quartz crystal makes regulation unnecessary and allows for easy design; (2)Direct bus-compatibility(120ns access time); (3)ALE input terminal available for 8048, 8051 and 8085 series; (4)Incorporates built-in time(hour, minute, second)and date(year, month, week, day)counters; (5)Interrupt masking; (6)Low current consumption and features a backup function.
Diagrams
