ST ST8024 User Manual

Features

■ Designed to be compatible with the NDS

conditional access system

■ IC card interface

■ 3 or 5 V supply for the IC (V

■ Three specifically protected half-duplex bi-

directional buffered I/O lines to card contacts
C4, C7 and C8

■ DC-DC converter for V

CC

separately powered from a 5 V ± 20% supply
(V

and PGND)

DDP

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

(V

) with appropriate decoupling has the

CC

following capabilities:
–I

< 80 mA at V

CC

DDP

– 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, V

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

■ 26 MHz integrated crystal oscillator

■ Clock generation for cards up to 20 MHz

DD

(divided by 1, 2, 4 or 8 through CLKDIV1 and
CLKDIV2 signals) with synchronous frequency
changes

■ Non-inverted control of RST via pin RSTIN

and GND)

DD

generation

= 4 to 6.5 V

or V

DDP

drop-out

ST8024

Smartcard interface

SO-28

■ 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 set­top-box, IC card readers for banking,
identification, pay TV.

TSSOP28

Table 1. Device summary

Order codes Temperature range Packages Packaging

ST8024CDR - 25 to 85 °C SO-28 (tape and reel) 1000 parts per reel

ST8024CTR - 25 to 85 °C TSSOP28 (tape and reel) 2500 parts per reel

March 2009 Rev 8 1/31

www.st.com

31

Contents ST8024

Contents

1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.1 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2 Voltage supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.1 Without external divider on pin PORADJ . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.2 With an external divider on pin PORADJ . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.3 Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.3 Clock circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.4 I/O transceivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.5 Inactive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.6 Activation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.7 Active mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.8 Deactivation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.9 V

5.10 Fault detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

CC

6 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2/31

ST8024 List of tables

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 5. Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 6. Electrical characteristics over recommended operating condition . . . . . . . . . . . . . . . . . . . . 9

Table 7. Step-up converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 8. Card supply voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 9. Crystal connection (pins XTAL1 and XTAL2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 10. Data lines (pins I/O, I/OUC, AUX1, AUX2, AUX1UC AND AUX2UC). . . . . . . . . . . . . . . . . 11

Table 11. Data lines to card reader (pins I/O, AUX1 AND AUX2 with integrated

11 kΩ pull-up resistor to V

Table 12. Data lines to microcontroller (pins I/OUC, AUX1UC AND AUX2UC with

integrated 11 kΩ pull-up resistor to V

Table 13. Internal oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 14. Reset output to card reader (pin RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 15. Clock output to card reader (pin CLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 16. Control inputs (pins CLKDIV1, CLKDIV2, CMDVCC, RSTIN and 5 V / 3 V . . . . . . . . . . . . 14

Table 17. Card presence inputs (pins PRES and PRES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 18. Interrupt output (pin OFF NMOS drain with integrated 20 kΩ pull-up resistor to V

Table 19. Protection and limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 20. Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 21. Clock frequency selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 22. Card presence indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 23. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

CC

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

DD

); . . . 14

DD

3/31

List of figures ST8024

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2. Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3. Definition of output and input transition times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 4. Voltage supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 5. Activation sequence using RSTIN and CMDVCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 6. Activation sequence at t

Figure 7. Deactivation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 8. Behavior of OFF, CMDVCC, PRES and V

Figure 9. Emergency deactivation sequence (card extraction) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 10. Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

CC

4/31

ST8024 Diagram

1 Diagram

Figure 1. Block diagram

5/31

Pin configuration ST8024

2 Pin configuration

Figure 2. Pin connections

Table 2. Pin description

Pin n° Symbol Name and function

1 CLKDIV1 Control of CLK frequency

2 CLKDIV2 Control of CLK frequency

35V/3V

4 PGND Power ground for step-up converter

5 C1+ External cap. for step-up converter

6V

DDP

7 C1- External cap. step-up converter

8V

UP

9PRES

10 PRES Card presence input (active high)

11 I/O Data line to and from card (C7) (internal 11 kΩ pull-up resistor connected to V

12 AUX2 Auxiliary line to and from card (C8) (internal 11 kΩ pull-up resistor connected to V

13 AUX1 Auxiliary line to and from card (C4) (internal 11 kΩ pull-up resistor connected to V

14 CGND Ground for card signal (C5)

15 CLK Clock to card (C3)

16 RST Card reset (C2)

17 V

18 V

CC

THSEL

VCC selection pin

Power supply for step-up converter

Output of step-up converter

Card presence input (active low)

Supply voltage for the card (C1)

Deactivation threshold selector pin (under voltage lock-out)

CC

)

)

CC

)

CC

6/31

ST8024 Pin configuration

Table 2. Pin description (continued)

Pin n° Symbol Name and function

19 CMDVCC

Start activation sequence input (active low)

20 RSTIN Card reset input from MCU

21 V

DD

Supply voltage

22 GND Ground

23 OFF

Interrupt to MCU (active low)

24 XTAL1 Crystal or external clock input

25 XTAL2 Crystal connection (leave this pin open if external clock is used)

26 I/OUC MCU data I/O line (internal 11 kΩ pull-up resistor connected to V

DD

)

27 AUX1UC Non-inverting receiver input (internal 11 kΩ pull-up resistor connected to V

28 AUX2UC Non-inverting receiver input (internal 11 kΩ pull-up resistor connected to V

DD

DD

)

)

7/31

Maximum ratings ST8024

3 Maximum ratings

Table 3. Absolute maximum ratings

Symbol Parameter Min. Max. Unit

V

DD, VDDP

Supply voltage -0.3 7 V

Voltage on pins XTAL1, XTAL2, 5V/3V, RSTIN, AUX2UC,

V

V

V

ESD1

ESD2

T

J(MAX)

T

STG

1. All card contacts are protected against any short with any other card contact

2. Method 3015 (HBM, 1500 Ω, 100 pF) 3 positive pulses and 3 negative pulses on each pin referenced to ground.

AUX1UC, I/OUC, CLKDIV1, CLKDIV2, PORADJ, CMDVCC

n1

n2

n3

, PRES and OFF

PRES

Voltage on card contact pins I/O, RST, AUX1, AUX2 and CLK -0.3 VCC + 0.3 V

Voltage on pins VUP, S1 and S2 7 V

MIL-STD-883 class 3 on card contact pins, PRES

(2)

MIL-STD-883 class 2 on microcontroller contact pins and

(1) (2)

RSTIN

and PRES

Maximum operating junction temperature 150 °C

Storage temperature range -40 150 °C

,

(1)

-0.3 VDD + 0.3 V

-6 6 kV

-2 2 kV

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these conditions is not implied.

Table 4. Thermal data

Symbol Parameter Condition SO-28 TSSOP28 Unit

R

Thermal resistance junction-ambient temperature

thJA

Multilayer test board

(Jedec standard)

56 50 °K/W

Table 5. Recommended operating conditions

Symbol Parameter Test conditions Min. Typ. Max. Unit

T

8/31

Temperature range -25 85 °C

A

ST8024 Electrical characteristics

4 Electrical characteristics

VDD = 3.3 V, V
T

= 25 °C.

A

Table 6. Electrical characteristics over recommended operating condition

DDP

= 5 V, f

= 10 MHz, unless otherwise noted. Typical values are to

XTAL

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

V

DDP

DD

Supply voltage 2.7 6.5 V

= 5V; |ICC| < 80 mA 4.0 5 6.5

V

Supply voltage for the
voltage doubler

CC

= 5V; |ICC| < 20 mA 3.0 6.5

V

CC

Card Inactive 1.2

I

DD

Supply current

Card Active; f

CLK

= f

; CL = 30pF 1.5

XTAL

Inactive mode 0.1

= f

; CL = 30pF; |ICC|

XTAL

10

2.35 2.45 2.55 V

1.25 1.28 1.31 V

1.19 1.22 1.25 V

I

DDP

V

th2

V

HYS2

V

th(ext)rise

V

th(ext)fall

V

HYS(ext)

DC-DC converter supply
current

Falling threshold voltage
on V

DD

Hysteresis of threshold
voltage V

th2

External rising threshold
voltage on V

DD

External falling threshold
voltage on V

DD

Hysteresis of threshold
voltage V

th(ext)

Active mode; f

CLK

= 0

= 5V; |ICC| = 80 mA 200

V

CC

V

= 3V; |ICC| = 65 mA 100

CC

no external resistors at pin PORADJ;
VDD level falling

no external resistors at pin PORADJ 50 100 150 mV

external resistor bridge at pin PORADJ;

level rising

V

DD

external resistor bridge at pin PORADJ;
VDD level falling

external resistor bridge at pin PORADJ 30 60 90 mV

Hysteresis of threshold

ΔV

HYS(ext)

voltage V

th(ext)

variation

external resistor bridge at pin PORADJ 0.25 mV/K

with temperature

t

W

I

P

TOT

Width of internal Power­On reset pulse

Leakage current on pin

L

PORADJ

Total power dissipation Continuous operation; Ta = -25 to 85°C 0.56 W

no external resistor at pin PORADJ 4 8 12

external resistor bridge at pin PORADJ 8 16 24

V

V

< 0.5 V -0.1 4 10

PORADJ

> 1.0 V -1 1

PORADJ

V

mA

mA

ms

µA

9/31

Electrical characteristics ST8024

VDD = 3.3 V, V
T

= 25 °C.

A

Table 7. Step-up converter

DDP

= 5 V, f

= 10 MHz, unless otherwise noted. Typical values are to

XTAL

Symbol Parameter Test conditions Min. Typ. Max. Unit

f

CLK

V

th(vd-vf)

V

UP(av)

Table 8. Card supply voltage characteristics

Clock frequency Card active 2.2 3.2 MHz

Threshold voltage for step-

5 V card 5.2 5.8 6.2
up converter to change to
voltage follower

Output voltage on pin VUP
(average value)

VDD = 3.3 V, V
T

= 25 °C (Note 1).

A

DDP

3 V card 3.8 4.1 4.4

= 5 V 5.2 5.7 6.2

V

CC

V

= 5 V, f

= 3 V; V

CC

= 10 MHz, unless otherwise noted. Typical values are to

XTAL

= 3.3 V 3.5 3.9 4.3

DDP

Symbol Parameter Test conditions Min. Typ. Max. Unit

C

VCC

External capacitance
on pin V

CC

Card supply voltage

V

(including ripple

CC

voltage)

V

CC

(RIPPLE)

(P-P)

Ripple voltage on V
(Peak to Peak value)

|ICC| Card supply current

S

Slew rate Slew up or down 0.08 0.15 0.22 V/µs

R

Note 2 and Note 3 80 220 nF

Card Inactive; |I

Card Inactive; |I

Card Active; |I

Card Active; |I

Card Active; single current
pulse I

=-100 mA; tp=2 µs

P

Card Active; single current
pulse I

=-100 mA; tp =2 µs

P

Card active; current pulses,

= 40 nAs

Q

P

Card Active; current pulses

=40 nAs with

Q

P

| < 200mA, tp < 400 ns

|I

CC

CC

f

= 20 kHz to 200 MHz 350 mV

RIPPLE

= 0 to 5V 80

V

CC

= 0 to 3V 65

CC

short circuit to GND 90 120

V

CC

| = 0 mA 5 and 3V card -0.1 0 0.1

CC

| = 1 mA 5 and 3V card -0.1 0 0.3

CC

| < 80 mA 5 V card 4.75 5 5.25

CC

| < 65 mA 3 V card 2.85 3 3.15

CC

5 V card 4.65 5 5.25

3 V card 2.76 3 3.20

5 V card 4.65 5 5.25

3 V card 2.76 3 3.20

5 V card 4.65 5 5.25

3 V card 2.76 3 3.20

V

V

V

mAV

10/31