DS3234SN#

Product Summary

The DS3234SN# is a low-cost, extremely accurate SPI bus real-time clock (RTC) with an integrated temperaturecompensated crystal oscillator (TCXO) and crystal. The DS3234SN# 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 RST output and also disables read and write access to the part when VCC drops below both VPF and VBAT. The RST pin is monitored as a pushbutton input for generating a reset externally. The DS3234SN# switches to the backup supply input and maintains accurate timekeeping when 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. The DS3234SN# is available in commercial and industrial temperature ranges, and is offered in an industry-standard 300-mil, 20-pin SO package. The applications of the DS3234SN# include Servers, Utility Power Meters, Telematics, GPS.

Parametrics

DS3234SN# absolute maximum ratings: (1)Voltage Range on Any Pin Relative to Ground: -0.3V to +6.0V; (2)Operating Temperature Range (noncondensing): -40℃ to +85℃; (3)Junction Temperature: +125℃; (4)Storage Temperature Range: -40℃ to +85℃; (5)Soldering Temperature (leads, 10s): +260℃/10s.

Features

DS3234SN# features: (1)Accuracy ±2ppm from 0℃ to +40℃; (2)Accuracy ±3.5ppm from -40℃ to +85℃; (3)Battery Backup Input for Continuous Timekeeping; (4)Operating Temperature Ranges: Commercial: 0℃ to +70℃, Industrial: -40℃ to +85℃; (5)Low-Power Consumption; (6)Real-Time Clock Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2099; (7)Two Time-of-Day Alarms; (8)Programmable Square-Wave Output; (9)4MHz SPI Bus Supports Modes 1 and 3; (10)Digital Temp Sensor Output: ±3℃ Accuracy; (11)Register for Aging Trim; (12)RST Input/Output; (13)300-Mil, 20-Pin SO Package; (14). Underwriters Laboratory (UL) Recognized.

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