NOTE: Datasheet may not yet reflect updated package obsolescence/phase out status or Package Drawing. Please refer to the BUY NOW tab for the most up to date package options and drawings. Please refer to PCN/PDN tabs for most current package obsolescence/phase out status.
Log in or register
to manage email notifications about changes to datasheets or PCNs for this part.
PT7C4372A/C are I2C 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. Table 1 shows the diverse functions of the two RTC circuits. More details are shown in section Overview of functions.
• 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: 1.3 V to 6 V • Wide interface voltage range: 1.8 V to 6 V • Low current consumption: 0.4 μA/3.0 V (Typ.)