100 NA Real-Time Clock/Calendar with Battery Backup | NXP Semiconductors

Automotive

Industrial

Consumer

Technologies

100 NA Real-Time Clock/Calendar with Battery Backup

PCF8523 Active

The PCF8523 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption. Data is transferred serially via the I²C-bus with a maximum data rate of 1000 kbit/s. Alarm and timer functions are available with the possibility to generate a wake-up signal on an interrupt pin. An offset register allows fine-tuning of the clock. The PCF8523 has a backup battery switch-over circuit, which detects power failures and automatically switches to the battery supply when a power failure occurs.

Product Details

Features

Key Features

  • Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
  • Resolution: seconds to years
  • Clock operating voltage: 1.0 V to 5.5 V
  • Low backup current: typical 150 nA at VDD = 3.0 V and Tamb = 25 °C
  • 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) I²C interface, read D1h, write D0h
  • Battery backup input pin and switch-over circuit
  • Freely programmable timer and alarm with interrupt capability
  • Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
  • Internal Power-On Reset (POR)
  • Open-drain interrupt or clock output pins
  • Programmable offset register for frequency adjustment

Buy/Parametrics

3 results

Include 1 NRND

Part

Show description

Order

CAD Model

Status

RTC Type

Accuracy (Typ) (+/- ppm)

Supply Voltage [Min to Max] (V)

Low Supply Current (μA)

Communication protocol

Capacitive Load (μF)

Battery Back Up

Watchdog timer

Programmable alarm

Countdown Timer

Tamper Input

Interrupt Output

Integrated Temperature Compensation

AEC-Q100 compliant

Package Type

Package Dimensions (LxWxZ (mm))

Operating Temperature (Min-Max) (℃)

Budgetary Price excluding tax

PCF8523T
Data Sheet

Active

IC

20 to 50 at 25°C

1.6 to 5.5

0.15

I²C

7, 12.5

Yes

Y

Y

Y

0

2

N

N

SO8

4.9 x 3.9 x 1.75

-40 to 85

1K @ US$0.45
PCF8523TK
Data Sheet

Active

IC

20 to 50 at 25°C

1.6 to 5.5

0.15

I²C

7, 12.5

Yes

Y

Y

Y

0

2

N

N

HVSON8

—

-40 to 85

1K @ US$0.52
PCF8523TS
Data Sheet

Active

IC

20 to 50 at 25°C

1.6 to 5.5

0.15

I²C

7, 12.5

Yes

Y

Y

Y

0

2

N

N

TSSOP14

5 x 4.4 x 1.1

-40 to 85

1K @ US$0.48

Documentation

Quick reference to our documentation types.

Filters

1-10 of 17 documents

Compact List

Application Note (3)
Brochure (1)
Data Sheet (1)
Package Information (4)
Packing Information (3)
Show All

Design Files

Quick reference to our design files types.
Filters

2 design files

Hardware

Quick reference to our board types.
Filters

1 hardware offering

Engineering Services

2 engineering services

To find additional partner offerings that support this product, visit our Partner Marketplace.

Support

What do you need help with?

Search

Recently viewed products

There are no recently viewed products to display.