TDA8004 View Datasheet(PDF) - Philips Electronics

Part Name

Description

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TDA8004

IC card interface

Philips Electronics 

Philips Semiconductors

IC card interface

Product specification

TDA8004T

handbook, full pagewidth

PRES

OFF

CMDVCC

VCC

Deactivation caused by

cards withdrawal

Deactivation caused by

short circuit

FCE271

Fig.7 Behaviour of OFF, CMDVCC, PRES and VCC.

handbook, full pagewidth

OSC_INT/64

(T ≈ 25 µs)

OFF

PRES

VCC

I/O

CLK

RST

tde

t10

t14

t13

high - Z

t12

t11

MGE740

Fig.8 Emergency deactivation sequence.

VCC regulator

VCC buffer is able to deliver up to 65 mA continuously. It has an internal overload detection at approximately 90 mA.

This detection is internally filtered, allowing spurious current pulses up to 200 mA to be drawn by the card without causing

a deactivation (the average current value must stay below 65 mA).

For VCC accuracy reasons, a 100 nF capacitor with ESR < 100 mΩ should be tied to CGND near pin 17 and a 100 nF

(or better 220 nF) with same ESR should be tied to CGND near C1 contact.

1999 Dec 30

11

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