DS1342 Datasheet | Maxim Integrated

19-4998; Rev 0; 10/09 Low-Current I2C RTCs for High-ESR Crystals General Description The DS1341/DS1342 low-current real-time clocks (RTCs) are timekeeping devices that provide an extremely low standby current, which permits longer life from a power supply. The DS1341/DS1342 support high-ESR crystals, which broaden the pool of usable crystals for the devices. The DS1341 uses a 6pF crystal, while the DS1342 uses a 12.5pF crystal. These devices are accessed through an I2C serial interface. Other Features include two time-of-day alarms, two interrupt outputs, a programmable squarewave output, and a serial bus timeout mechanism. The clock/calendar provides seconds, minutes, hours, day, date,...