Click to expand full text
Real time clock module 4-bit REAL TIME CLOCK MODULE
RTC-72421/ 72423
• • • • • •
Built-in crystal unit allows adjustment-free efficient operation. ALE input terminal available for 8048, 8051, and 8085 series. 12/24 h clock switchover function and automatic leap year setting. Interrupt masking. 30 second adjustment function. Low current consumption and features a backup function.
Actual size
Specifications (characteristics) Absolute Max. rating
Symbol Item VDD Power source voltage VI/O Input and output voltage Storage temperature TSTG Condition Ta=+25 °C Ta=+25 °C RTC-72421 RTC-72423 RTC-72421 Soldering condition TSOL RTC-72423 Specifications -0.3 to 7.0 GND -0.3 to VDD+0.