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NXP Semiconductors Electronic Components Datasheet

PCF2129A Datasheet

Integrated RTC TCXO and quartz crystal

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PCF2129A
Integrated RTC, TCXO and quartz crystal
Rev. 01 — 13 January 2010
www.DataSheet4U.com
Product data sheet
1. General description
The PCF2129A is a CMOS1 real 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 (IOL = 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 VDD = 3.0 V and Tamb = 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.


NXP Semiconductors Electronic Components Datasheet

PCF2129A Datasheet

Integrated RTC TCXO and quartz crystal

No Preview Available !

NXP Semiconductors
PCF2129A
Integrated RTC, TCXwOwwa.nDdatqauShaeretzt4cU.rcyosmtal
3. Applications
„ Electronic metering for electricity, water, and gas
„ Timekeeping instruments with high precision
„ GPS equipment to reduce time to first fix
„ Applications that require an accurate process timing
„ Products with long automated unattended operation time
4. Ordering information
Table 1. Ordering information
Type number Package
Name Description
PCF2129AT/1 SO20 plastic small outline package; 20 leads; body width 7.5 mm
Version
SOT163-1
5. Marking
Table 2. Marking codes
Type number
PCF2129AT/1
Marking code
PCF2129AT
PCF2129A_1
Product data sheet
Rev. 01 — 13 January 2010
© NXP B.V. 2010. All rights reserved.
2 of 68


Part Number PCF2129A
Description Integrated RTC TCXO and quartz crystal
Maker NXP Semiconductors
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PCF2129A Datasheet PDF






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