ST ST8004 User Manual

General features

■ 3V or 5V supply for the IC

■ Step-up converter for V

■ 3 specific protected half duplex bi-directional

buffered I/O lines

■ Automatic activation and deactivation

sequences

■ Thermal and short-circuit protections on all

card contacts

■ 26MHz integrated crystal oscillator

■ Clock generation for the card up to 20MHz with

synchronous frequency changes

■ ISO7816-3 compatible

■ Enhanced ESD protection on card side

■ SO-28 package

■ Under voltage lockout protection selectable to

3V or 2.2V

■ Supply supervisor integrated

generation

ST8004

Smartcard interface

SO-28

Description

The ST8004 is a complete low cost analog interface for asynchronous 3V and 5V smart cards. It can be placed between the card and the microcontroller with few external components to perform all supply protection and control functions. Main applications are: smartcard readers for Set Top Box, IC card readers for banking, identification.

Order code

Part number Temperature range Package Packaging

ST8004CDR 0 to 85 °C SO-28 (Tape & Reel) 1000 parts per reel

January 2007 Rev 7 1/26

www.st.com

Contents ST8004

Contents

1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.1 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.2 Voltage supervisor (for VTHSEL = VDD or floating) . . . . . . . . . . . . . . . . . 15

6.3 Voltage supervisor (for VTHSEL = GND) . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.4 Clock circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.5 I/O Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.6 Inactive state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.7 Activation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.8 Active state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.9 Deactivation sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.10 Fault detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2/26

ST8004 Diagram

1 Diagram

Figure 1. Block diagram

3/26

Pin configuration ST8004

2 Pin configuration

Figure 2. Pin connections

Table 1. 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

DDP

7 C1- External Cap. Step-Up converter

9 PRES Card Presence Input (Active Low)

10 PRES Card Presence Input (Active High)

11 I/O Data Line to and from card (C7) (internal 10kΩ pull-up resistor connected to V

12 AUX2 Auxiliary line to and from card (C8) (internal 10kΩ pull-up resistor connected to V

13 AUX1 Auxiliary line to and from card (C4) (internal 10kΩ pull-up resistor connected to VCC)

14 CGND Ground for card signal (C5)

15 CLK Clock to card (C3)

16 RST Card Reset (C2)

VCC selection pin.

Power Supply for Step-Up converter

Output of Step-Up converter

)

17 V

18 V

THSEL

19 CMDV

Supply Voltage for the card (C1)

Deactivation threshold selector pin (under voltage lock-out)

Start activation sequence input (Active Low)

4/26

ST8004 Pin configuration

Table 1. Pin description

Pin N° Symbol Name and function

20 RSTIN Card Reset Input from MCU

21 V

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 Data Line to and from MCU (internal 10kΩ pull-up resistor connected to V

27 AUX1UC Auxiliary line to and from MCU (internal 10kΩ pull-up resistor connected to V

)

28 AUX2UC Auxiliary line to and from MCU (internal 10kΩ pull-up resistor connected to VDD)

)

5/26

Maximum ratings ST8004

3 Maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Min Max Unit

DD, VDDP

ESD1

ESD2 MIL-STD-883 class 2 on µC contact pins and RSTIN (Note 1, 2) -2 2 KV

Supply voltage -0.3 7 V

Voltage on pins XTAL1, XTAL2, 5V/3V, RSTIN, AUX2UC, AUX1UC, I/OUC, CLKDIV1, CLKDIV2, V

PRES

, PRES and OFF

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 9 V

MIL-STD-883 class 3 on card contact pins, PRES and PRES (Note 1, 2)

THSEL

, CMDVCC,

-0.3 VDD + 0.3 V

-6 6 KV

Note: Absolute Maximum Ratings are those values beyond which damage to the device may

occur. Functional operation under these conditions is not implied.

Note: 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.

Table 3. Thermal data

Symbol Parameter Condition Value Unit

thJA

Thermal resistance junction-ambient temperature In free air 70 °K/W

Table 4. Recommended operating conditions

Symbol Parameter Test Conditions Min. Typ. Max. Unit

6/26

Temperature range -25 85 °C

ST8004 Electrical characteristics

4 Electrical characteristics

Table 5. Electrical characteristics over recommended operating (V

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

= 25°C)

= 3.3V, V

Symbol Parameter Test Conditions Min. Typ. Max. Unit

= VDD or floating 2.7 6.5

DDP

O(VUP)

Supply voltage

Supply voltage for the voltage doubler

Output voltage on pin VUP from step-up converter

THSEL

= GND 3.150 6.5

THSEL

4.5 5 6.5

To comply with V

I(RIPPLE)(P-P)

specifications 4.75 5.25

Input voltage to be

I(VUP)

applied on V block the step-up

in order to

79V

converter

= 5V, f

DDP

XTAL

5.5 V

HYS(th2)

HYS(th3)

∆T

Supply current

Supply current for step-up

converter

Threshold voltage on VDDV

th2

Threshold voltage on VDDV

th3

Hysteresis on V

Pulse width of the internal

alarm pulse

Delay of internal filter V

HFIL

th2

th3

Inactive mode 1.2

= f

Active mode; f

CLK

; CL = 30pF 1.5

XTAL

Inactive mode 0.1

Active mode; f

= 30pF

= VDD or floating 2.2 2.4 V

THSEL

= GND 2.9 3.08 V

THSEL

= VDD or floating 50 150 mV

THSEL

= GND 0 mV

THSEL

CLK

= f

XTAL

ICC=0 18

;

=65 mA 150

620ms

= GND 5 50 µs

THSEL

7/26

Electrical characteristics ST8004

Table 6. Card supply voltage characteristics (V

unless otherwise noted. Typical values are to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Inactive mode -0.1 0.1

= 3.3V, V

= 5V, f

DDP

= 25°C) (Note 1)

XTAL

= 10MHz,

I(RIPPLE)

(P-P)

Output voltage including ripple

Peak to peak ripple voltage on V

Inactive mode; I

Active Mode; V

| < 65 mA DC

Active Mode; single current pulse of 100 mA; 2 µs

Active Mode; current pulse of 40 nAs with |I t < 400 ns

20 KHz to 200 MHz, V

= 1 mA -0.1 0.4

= 5V ± 5%

DDP

5 V card 4.75 5.25

3 V card 2.85 3.15

5 V card 4.65 5.25

3 V card 2.85 3.15

5 V card 4.65 5.25

|<200mA

DDP

3 V card 2.76 3.15

= 5V ± 5% 350 mV

From 0 to 5V or to 3V 65

|ICC| Output current

short circuit to GND 150

Slew rate Up to down 0.11 0.22 V/µs

Table 7. Crystal connection (pins XTAL1 and XTAL2) (VDD = 3.3V, V

unless otherwise noted. Typical values are to T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

External capacitors on pins

EXT

XTAIL1, XTAIL2

Depending on specification of crystal or resonator used

= 25°C)

DDP

= 5V, f

XTAL

= 10MHz,

15 pF

I(XTAL)

IH(XTAL)

IL(XTAL)

Crystal Input Frequency 2 26 MHz

High level input voltage on XTAIL1

Low level input voltage on XTAIL1

0.7 V

0 0.3 V

Table 8. Data lines (pins I/O, AUX1, AUX2, AUX1UC and AUX2UC) (VDD = 3.3V, V

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

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Delay between falling edge on pin I/O

D(EDGE)

I/O(MAX)

8/26

and I/OUC and width of active pull-up pulse

Maximum frequency of data lines 1 MHz

Input capacitance on data lines 10 pF

= 25°C)

200 ns

DDP

= 5V, f

XTAL

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