Datasheet > PCF2129A

PCF2129A

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
68页	471K
描述
Integrated RTC, TCXO and quartz crystal

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PCF2129A 数据手册

PCF2129A

Integrated RTC, TCXO and quartz crystal

Rev. 01 — 13 January 2010

Product data sheet

1. General description

The PCF2129A is a CMOS¹real time clock 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 PCF2129A has 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

Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors

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

Timestamp function

with interrupt capability

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

detection)

Two line bidirectional 1 MHz Fast-mode Plus (Fm+) I²C-bus interface (I_OL= 20 mA at

pin SDA)

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 (open-drain)

Programmable 1 second or 1 minute interrupt

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

Automatic leap year correction

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...68

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