Real Time Clock Serial(I2C) 8-Pin TSSOP T/R

PT7C4372A are I 2C bus interface-compliant real-time clocks that have been adjusted for high precision. In addition to providing a function for generating six types of interrupts, a dual alarm function, an oscillation stop detection function (used to determine presence of valid internal data at power-on), they includes a digital clock precision adjustment function that can be used to set various levels of precision. Since the internal oscillation circuit is driven at a constant voltage, 32-kHz clock output is stable and free of voltage fluctuation effects. External quartz oscillator 32.000kHz and 32.768kHz selectable Supports I2C-Bus"s high speed mode (400 kHz) Includes time (Hour/Minute/Second) and calendar (Year/Month/Date/Day) counter functions (BCD code) Select between 12-hr and 24-hr clock display Auto calculation of leap years until 2099 Built-in high-precision clock precision control logic Interrupt generation function (cycle time range: 1 month to 0.5 seconds, includes interrupt flags and interrupt stop function) Alarm functions (Alarm_A: Day/Hour/Min) 32-kHz clock output (/INTB output) Oscillation stop detection function (used to determine presence of internal data) Wide Time keeping voltage range: 1.3V to 6V Wide interface voltage range: 1.8 V to 6 V Low current consumption: 0.4 µA/3.0 V (Typ.)