DS3234S#

DS3234S# is a low-cost, extremely accurate SPI bus real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The DS3234 incorporates a precision, temperature-compensated voltage reference and comparator circuit to monitor VCC. When VCC drops below the power-fail voltage (VPF), the device asserts the active-low RST output and also disables read and write access to the part when VCC drops below both VPF and VBAT. The active-low RST pin is monitored as a pushbutton input for generating a µP reset. The device switches to the backup supply input and maintains accurate timekeeping when the main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. Applications include servers, utility power meters, telematics, and GPS.

• Highly accurate RTC with integrated crystal and SRAM completely manages all timekeeping functions
• Frequency stability vs temperature is +2ppm at 0°C to +40°C, VCC=3.3V or VBAT=3.3V
• Digital temp sensor output: ±3°C accuracy
• Register for aging Trim, RST input/output
• Two time-of-day alarms, programmable square-wave output
• Simple serial interface connects to most microcontrollers, 4MHz SPI bus supports modes 1 and 3
• Battery-backup input for continuous timekeeping, low power operation extends battery backup run time
• Underwriters Laboratories® (UL) recognized
• 20 SO package
• 0°C to +70°C temperature rating

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party.