PCF2127TSLASH2Y datasheet(1/100 Pages) PHILIPS

Part #	PCF2127T/2Y

Description	Accurate RTC with integrated quartz crystal for industrial applications

PDF	100 Pages

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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1.

General description

The PCF2127 is a CMOS1 Real 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 PCF2127

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.

For a selection of NXP Real-Time Clocks, see Table 94 on page 89

2.

Features and benefits

 UL Recognized Component

 Operating temperature range from

40 C to +85 C

 Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors

 Typical accuracy:

 PCF2127AT:

3 ppm from 15 C to +60 C

 PCF2127T:

3 ppm from 30 C to +80 C

 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

 512 bytes of general-purpose static RAM

 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

 Extra power fail detection function with input and output pins

 Power-On Reset Override (PORO)

 Oscillator stop detection function

 Interrupt output (open-drain)

PCF2127

Accurate RTC with integrated quartz crystal for industrial

applications

Rev. 8 — 19 December 2014

Product data sheet

1.

The definition of the abbreviations and acronyms used in this data sheet can be found in Section 21.

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Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	PCF2127	715Kb / 65P	Tiny Real-Time Clock/calendar with alarm function and I2C-bus Rev. 7-30 March 2018
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Similar Description - PCF2127T/2Y

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PCF2127T/2Y Datasheet(PDF) 1 Page - NXP Semiconductors

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