Datasheet > PCF2127A

PCF2127A

更新时间： 2024-11-20 05:59:47

品牌	Logo	应用领域
恩智浦 - NXP		晶体石英晶体石英晶振温度补偿晶振
页数	文件大小	规格书
80页	516K
描述
Integrated RTC, TCXO and quartz crystal

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PCF2127A 数据手册

PCF2127A

Integrated RTC, TCXO and quartz crystal

Rev. 02 — 7 May 2010

Product data sheet

1. General description

The PCF2127A is a CMOS¹Real Time Clock (RTC) and calendar with an integrated

Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz

crystal optimized for very high accuracy and very low power consumption. The PCF2127A

has 512 bytes of general purpose static RAM, a selectable I²C-bus or SPI-bus, a backup

battery switch-over circuit, a programmable watchdog function, a timestamp function, and

many other features.

2. Features and benefits

Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors

Typical accuracy: ±3 ppm from −15 °C to +60 °C

Integration of a 32.768 kHz quartz crystal and oscillator in the same package

Provides year, month, day, weekday, hours, minutes, and seconds

512 bytes of general purpose static RAM

Timestamp function

with interrupt capability

detection of two different events on one multilevel input pin (e.g. for tamper

detection)

Two line bidirectional 400 kHz Fast-mode I²C-bus interface (I_OL= 3 mA at pin

SDA/CE)

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 pin

Battery low detection function

Extra power fail detection function with input and output pins

Power-On Reset Override (PORO)

Oscillator stop detection function

Interrupt output and system reset pin (open-drain)

Programmable 1 second or 1 minute interrupt

Programmable countdown timer with interrupt capability

Programmable watchdog timer with interrupt and reset capability

Programmable alarm function with interrupt capability

Programmable square wave open-drain output pin

Clock operating voltage: 1.2 V to 4.2 V

Low supply current: typical 0.65 μA at V_DD= 3.0 V and T_amb= 25 °C

1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 17.

12 3 4 5 6 7...80

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