PCF8573 Ver la hoja de datos (PDF) - Philips Electronics

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PCF8573

Clock/calendar with serial I/O

Philips Electronics 

Philips Semiconductors

Clock/calendar with serial I/O

Product specification

PCF8573

5 BLOCK DIAGRAM

handbook, full pagewidth

FSET

32.768 kHz

OSCO 14

OSCI 13 OSCILLATOR

CT

4

VDD SDA

N

5

SCL

LS

11

LS

PRESCALER

1 : 215

INPUT

FILTER

I2C

BUS

CONTROL

SEC MIN

VDD

10 9

16

SECONDS

LS

COUNTER

1 : 60

POWER-ON 15

RESET

8

6

TIME COUNTER

MINUTES HOURS

DAYS

DATE

MONTHS

7

1.5 V

VSS2

EXTPF

PFIN

COMPARATOR

3

LS

COMP

ALARM REGISTER

12

LS

TEST

LS

1

2

A0 A1

LS LEVEL SHIFTER

Fig.1 Block diagram.

PCF8573

MBL804

6 PINNING

SYMBOL PIN

DESCRIPTION

A0

1 address input

A1

2 address input

COMP

SDA

SCL

3 comparator output

4 serial data line; I2C-bus

5 serial clock line; I2C-bus

EXTPF 6 enable power fail flag input

PFIN

VSS2

MIN

7 power fail flag input

8 negative supply 2 (I2C interface)

9 one pulse per minute output

SEC

10 one pulse per second output

FSET

11 oscillator tuning output

TEST

OSCI

12 test input; connect to VSS2 if not in use

13 oscillator input

OSCO 14 oscillator input/output

VSS1

VDD

15 negative supply 1 (clock)

16 common positive supply

handbook, halfpage

A0 1

A1 2

COMP 3

16 VDD

15 VSS1

14 OSCO

SDA 4

13 OSCI

PCF8573P

SCL 5

12 TEST

EXTPF 6

11 FSET

PFIN 7

10 SEC

VSS2 8

9 MIN

MBL805

Fig.2 Pinning diagram (DIP16).

2003 Jan 27

4

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