PCA2129T数据手册恩XP中文资料规格书

描述 Description

The PCA2129 is a CMOS Real Time Clock (RTC) and calendar with an integratedTemperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartzcrystal optimized for very high accuracy and very low power consumption. The PCA2129has a selectable I²C-bus or SPI-bus, a backup battery switch-over circuit, aprogrammable watchdog function, a timestamp function, and many other features.

特性 Features

• AEC-Q100 compliant for automotive applications
• Operating temperature range from -40 °C to +85 °C
• Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors
• Typical accuracy:±3 ppm from -30 ℃ to +80 ℃
• Integration of a 32.768 kHz quartz crystal and oscillator in the same package
• Provides year, month, day, weekday, hours, minutes, seconds, and leap year correction
• Timestamp function:
• with interrupt capability
• detection of two different events on one multilevel input pin (for example, for tamper detection)
• Two line bidirectional 400 kHz Fast-mode I²C-bus interface
• 3 line SPI-bus with separate data input and output (maximum speed 6.5 Mbit/s)
• Battery backup input pin and switch-over circuitry
• Battery backed output voltage
• Battery low detection function
• Power-On Reset Override (PORO)
• Oscillator stop detection function
• Interrupt output (open-drain)
• Programmable 1 second or 1 minute interrupt
• Programmable watchdog timer with interrupt
• Programmable alarm function with interrupt capability
• Programmable square output
• Clock operating voltage: 1.8 V to 4.2 V
• Low supply current: typical 0.70 μA at VDD = 3.3 V

应用 Application

电、水和煤气的电子计量
精准计时
获取当天的精确时间
GPS设备可减少初次定位的时间
需要精确处理定时的应用
长时间自动控制无人操作的产品