The MCP795W22-I/ST from Microchip Technology is a real-time clock (RTC) Integrated Circuit with clock/calendar function and 64 B SPI interface, in a 14-TSSOP package with 0.173" (4.40 mm) width.
The MCP795W22T-I/ST from Microchip Technology is a real-time clock (RTC) Integrated Circuit with clock/calendar functions, 64B, an SPI interface and a 14-TSSOP (0.173", 4.40 mm width) package.
The MCP795W22T-I/SL from Microchip Technology is a real-time clock (RTC) Integrated Circuit with clock/calendar functions, 64B of SPI memory, in a 14-SOIC (0.154", 3.90 mm width) package.