RTCs run on time with temperature compensation

26 September 2001 DSP, Micros & Memory

The RTC7301 is a realtime clock with a difference; an integrated sensor outputs a signal to indicate the chip temperature within the range of -40 to +85°C. This allows the programmer to alter the digital pace adjustment registers which automatically compensate for the natural temperature curve of the crystal.

Available from Epson, a similar device, the RTC4701, has the same feature making both devices ideal for battery chargers or portable instrumentation. The RTC7301 has a 4 bit parallel bus interface and the RTC4701, three-wire serial; both devices incorporate an on-board crystal and have the usual Epson clock/calendar functions.

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