PT7C4372ALEX

PT7C4372A/C is a high-accuracy real-time clock with I²C bus interface. In addition to generating six types of interrupts, dual alarm functions, and oscillation stop detection (used to determine the presence of valid internal data at power-on), it also includes a digital clock accuracy adjustment function for configuring different accuracy levels. Since the internal oscillator circuit is driven at a constant voltage, the 32kHz clock output remains stable and is unaffected by voltage fluctuations.

Key features

• External quartz oscillator: 32.000kHz or 32.768kHz selectable
• I²C bus high-speed mode support (400kHz)
• Time (hour/minute/second) and calendar (year/month/day/day-of-week) counter functions (BCD code)
• 12-hour and 24-hour clock display selectable
• Automatic leap year calculation through 2099
• Built-in high-precision clock accuracy control logic
• Interrupt generation function (periodic time range: 1 month to 0.5 seconds, with interrupt flag and interrupt stop functions)
• Alarm function (Alarm A: day/hour/minute)
• 32kHz clock output (/INTB output)
• Oscillation stop detection function (for determining validity of internal data)
• Wide timekeeping voltage range: 1.3V to 6V
• Wide interface voltage range: 1.8V to 6V
• Low current consumption: 0.4µA/3.0V (typ.)