I²C real-time clock with trickle-charge and wide supply range
The DS1340Z-18+ is a Clock/Calendar RTC from Analog Devices, communicating over an I²C (2-wire serial) interface. It tracks time in HH:MM:SS (24-hour format) and date in YY-MM-DD-dd format, with leap-year compensation built in. The battery-backup input accepts 1.3V to 3.7V, keeping the RTC running during main power loss. Maximum timekeeping current is 100µA at 1.89V, which sets the battery-life floor in a backup scenario. The trickle-charger feature recharges a supercap or lithium coin cell through a programmable series resistor.
The tube delivery suits prototype and low-volume builds; reel options are available through the supply chain.
Lifecycle and compliance status
Analog Devices lists the DS1340Z-18+ as Active with ROHS3 compliance.