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.
3 -55 to +85 -55 ...

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