PART NO.	PRICE		STOCK	MANUFACTURE	DESCRIPTION	Mounting Style	Package / Case	Minimum Operating Temperature	Maximum Operating Temperature	Packaging	Supply Voltage - Max	Supply Voltage - Min	Battery Backup Switching	RTC Bus Interface	Date Format	Time Format	RTC Memory Size
DS1338Z-3+	1+ $3.350 10+ $3.040 25+ $2.940 50+ $2.670	PDF RFQ	698 In-stock	Maxim Integrated	Real Time Clock I2C Serial RTC w/56 Byte NV RAM	SMD/SMT	SOIC-8	- 40 C	+ 85 C	Tube	3.3 V	2.7 V		Serial, I2C	YY-MM-DD	HH:MM:SS	56 B
DS1390U-3+	1+ $3.370 10+ $3.200 25+ $2.960 50+ $2.810	PDF RFQ	1,178 In-stock	Maxim Integrated	Real Time Clock Low-V SPI/3-Wire With Trickle Charger	SMD/SMT	MSOP-10	- 40 C	+ 85 C	Tube	3.3 V	2.7 V	Backup Switching	Serial, SPI	YY-MM-DD	HH:MM:SS:hh
DS1339U-3+	1+ $3.460 10+ $3.290 25+ $3.050 50+ $2.900	PDF RFQ	382 In-stock	Maxim Integrated	Real Time Clock I2C Serial RTC	SMD/SMT	MSOP-8	- 40 C	+ 85 C	Tube	3.3 V	2.7 V	Backup Switching	Serial, I2C	YY-MM-DD	HH:MM:SS
DS1672S-3+	1+ $2.660 10+ $2.530 25+ $2.340 50+ $2.230	PDF RFQ	350 In-stock	Maxim Integrated	Real Time Clock I2C 32-Bit Binary Counter RTC	SMD/SMT	SOIC-8	- 40 C	+ 85 C	Tube	5.5 V	2.7 V	Backup Switching	Serial, I2C	YY-MM-DD	HH:MM:SS