2004 July 12

5

Philips Semiconductors

Product specification

IC card interface

TDA8024

6

BLOCK DIAGRAM

mdb051

100 nF

100 nF

100 nF

100 nF

100 nF

100 nF

I/O

TRANSCEIVER

I/O

TRANSCEIVER

I/O

TRANSCEIVER

THERMAL

PROTECTION

GENERATOR

RST

BUFFER

CLOCK

BUFFER

SEQUENCER

CLOCK

CIRCUITRY

OSCILLATOR

HORSEQ

INTERNAL OSCILLATOR

2.5 MHz

DC/DC CONVERTER

INTERNAL

REFERENCE

VOLTAGE SENSE

SUPPLY

EN2

EN5

EN4

EN3

CLK

EN1 CLKUP

ALARM

21

6

75

S1

S2

8

4 PGND

16

14

RST

CGND

PRES

10

9

PRES

15

CLK

13

12

11

AUX1

AUX2

I/O

22

GND

26

28

27

I/OUC

AUX2UC

AUX1UC

25

24

2

1

3

19

20

23

18

(1)

XTAL2

XTAL1

CLKDIV2

CLKDIV1

5V/3V

CMDVCC

RSTIN

OFF

TDA8024

POWER_ON

R1

R2

PORADJ

Fig.1 Block diagram.

(1) Optional external resistor bridge. If this bridge is not required pin 18 should be connected to ground; see Section 8.2.2. Pin 18 is not connected

in the TDA8024AT.