RF5C15

The RF5C15 is real-time clocks for microcomputers that can be connected directly to data buses of 16 bit CPUs. The features of RF5C15 are: (1)connected directly to CPU enabling fast access; (2)4bit bidirectional data bus: D0-D3; (3)built-in clock counter and calendar counter; (4)all clock data expressed in BCD codes; (5)backed up by batteries; (6)selectable basic clock frequency: 16kHz, 1kHz, 128Hz, 16Hz, 1Hz, 1/60Hz.

The following is about the absolute maximum ratings of RF5C15: (1)supply voltage: -0.3 to 7.0V; (2)input voltage: -0.3 to VCC+0.3V; (3)output voltage: -0.3 to VCC+0.3V; (4)maximum power dissipation: 400mW at Ta=25; (5)operating temperature: -20 to 70; (6)storage temperature: -40 to 125.

The electrical characteristics of the RF5C15 are: (1)"H" input voltage(excluding OSCIN): 2.0V min and VCC+0.3V max; (2)"H" input voltage(excluding OSCIN): 2.4V min and VCC+0.3V max; (3)"L" input voltage(excluding OSCIN): -0.3V min and 0.8V max; (4)"L" input voltage(excluding OSCIN): -0.3V min and 0.5V max; (5)"H" output voltage: 2.4V min at IOH=-400A; (6)"L" output voltage: 0.4V max at IOL=2mA; (7)input leakage current: -10A min and 10A max at IOL=2mA.