Real Time Clock Ic Spi

Ic ds1307 64 x 8 serial i2c real time clock.

Real time clock ic spi.

The m41t93 is a low power serial spi bus real time clock rtc with a built in 32 768 khz oscillator external crystal controlled for the qfn16 package and embedded crystal for the sox18 package. The ds1302 real time clock module has an spi interface through which it can tell the time. The basic clock is obtained from the 32 768 khz crystal oscillator. The interface mode is selected by the chip version see 12.

Functional description the pcf2123 contains 16 8 bit registers with an auto incrementing address counter an on chip 32 768 khz oscillator with two integrated load capacitors a frequency divider which provides the source clock for the real time clock rtc a programmable clock output and a 6 25 mbit s spi bus. The ds1305 serial alarm real time clock provides a full binary coded decimal bcd clock calendar that is accessed by a simple serial interface. The clock calendar provides seconds minutes hours day date month and year information. The ds1307 serial real time clock rtc is a low power full binary coded decimal bcd clock calendar plus 56 bytes of nv sram.

They provide year month day weekday hours minutes and second information and. The ds3234 incorporates a precision temperature compensated voltage reference and comparator circuit to monitor v cc. A real time clock calendar rtcc maintains accurate time in an embedded system even when the main power is turned off. Our ultra low power real time clocks rtc deliver highly accurate real time fitting the automotive market aec q200.

Spi real time clock calendar 8. The accuracy is achieved enclosing a 32 khz tuning fork crystal xtal matched to an i c or spi interfaced rtc ic in a tiny vacuum ceramic housing. The clock calendar provides seconds minutes hours day date month and year information. Our automotive real time clocks provide the highest reliability and lowest power consumption.

The ds3234 is a low cost extremely accurate spi bus real time clock rtc with an integrated temperature compensated crystal oscillator tcxo and crystal. Address and data are transferred serially through an i2c bidirectional bus. Eight bytes of the register map are used for the clock calendar function and are configured in binary coded decimal bcd format. A thermal compensation of the frequency is based on the temperature measurement and calculation of the correction value.

42mm 24mm 12mm max 2 with 4 holes about 3 1mm in diameter 3 crystal 32 768khz matching capacitance 6pf size 2 6mm 4 ds1302 made large 8 pin dip chip chip ic block below for easy replacement and plug the chip. Our rtccs range from basic low cost devices to highly integrated mid range devices with either an i 2 c or spi interface and include additional nonvolatile memory and a combination of features that are very useful when operating within a single battery backed clock device. These devices feature either i 2 c or spi bus interfaces and support a range of automotive applications instrument cluster tachographs black boxes for electronic road pricing battery management units car radios.