RTC with integrated TCXO — what it means for the BOM
The Maxim Integrated DS3234SN#T&R is a temperature-compensated real-time clock (RTC) with an integrated TCXO and crystal, communicating over an SPI interface. It keeps time in YY-MM-DD-dd and HH:MM:SS (12/24 hr) formats, with 256 bytes of SRAM for user data, and generates alarms and square-wave outputs. The on-chip TCXO eliminates the need for an external crystal and trimming capacitors, saving board space and improving long-term accuracy over temperature — a key advantage for industrial and outdoor equipment where the ambient swings from -40°C to 85°C.
Lifecycle and sourcing reality
The DS3234SN#T&R carries an Active product status and is ROHS3 compliant.