The MCP795B20-I/SL from Microchip Technology is a real-time clock Integrated Circuit with clock/calendar functions, 64B and an SPI interface, in a 14-SOIC (0.154", 3.90 mm width) package.
The MCP795B20-I/ST from Microchip Technology is a real-time clock (RTC) Integrated Circuit with clock/calendar, 64B and SPI interface in a 14-TSSOP package, 0.173" (4.40 mm) wide.
The MCP795B20T-I/SL from Microchip Technology is a real-time clock Integrated Circuit with clock/calendar functions, 64B memory and an SPI interface, in a 14-SOIC package (0.154", 3.90mm width).
The MCP795B20T-I/ST from Microchip Technology is a real-time clock (RTC) Integrated Circuit with clock/calendar and 64B SPI, in a 14-TSSOP (0.173", 4.40 mm width) package.