ST8024 데이터 시트보기 (PDF) - STMicroelectronics

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ST8024

Smartcard interface

STMicroelectronics 

ST8024

Smartcard interface

Features

■ Designed to be compatible with the NDS

conditional access system

■ IC card interface

■ 3 or 5 V supply for the IC (VDD and GND)

■ Three specifically protected half-duplex bi-

directional buffered I/O lines to card contacts

C4, C7 and C8

■ DC-DC converter for VCC generation

separately powered from a 5 V ± 20% supply

(VDDP and PGND)

■ 3 or 5 V ± 5 % regulated card supply voltage

(VCC) with appropriate decoupling has the

following capabilities:

– ICC < 80 mA at VDDP = 4 to 6.5 V

– Handles current spikes of 40 nA up to 20

MHz

– Controls rise and fall times

– Filtered overload detection at

approximately 120 mA

■ Thermal and short-circuit protection on all card

contacts

■ Automatic activation and deactivation

sequences; initiated by software or by

hardware in the event of a short-circuit, card

take-off, overheating, VDD or VDDP drop-out

■ Enhanced ESD protection on card side (>6 kV)

■ 26 MHz integrated crystal oscillator

■ Clock generation for cards up to 20 MHz

(divided by 1, 2, 4 or 8 through CLKDIV1 and

CLKDIV2 signals) with synchronous frequency

changes

■ Non-inverted control of RST via pin RSTIN

SO-28

TSSOP28

■ ISO 7816, GSM11.11 and EMV (payment

systems) compatibility

■ Supply supervisor for spike-killing during

power-on and power-off and power-on reset

(threshold fixed internally or externally by a

resistor bridge)

■ Built-in debounce on card presence contacts

■ One multiplexed status signal off

Description

The ST8024 is a complete low cost analog

interface for asynchronous 3 V and 5 V smart

cards. It can be placed between the card and the

microcontroller with few external components to

perform all supply protection and control

functions. ST8024 is a direct replacement of

ST8004.

Main applications are: smartcard readers for set-

top-box, IC card readers for banking,

identification, pay TV.

Table 1. Device summary

Order codes

Temperature range

ST8024CDR

-25 to 85 °C

ST8024CTR

-25 to 85 °C

June 2008

Package

SO-28 (tape and reel)

TSSOP28 (tape and reel)

Rev 7

Packaging

1000 parts per reel

2500 parts per reel

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