MICROCHIP MCP7940N-I/P Real Time Clock RTCC, I2C, 64B, 8PDIP Brand New UK Seller
For communication, the MCP7940N uses the I²C™ bus. Using the programmable CLKOUT, frequencies of 32.768, 8.192 and 4.096kHz and 1Hz can be generated from the external crystal. Alarm output pin. Clock output pin with selectable frequency.