DS1339U-33+T&R /BKN

Real Time Clock (RTC) IC Clock/Calendar I²C, 2-Wire Serial 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)..

$4.77

MCP7940N-I/SN

Real Time Clock (RTC) IC Clock/Calendar 64B I²C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width)..

$0.85