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1/23
January 2005
I
IC CARD INTERFACE
I
3 OR 5 V SUPPLY FOR THE IC (V
DD
AND
GND)
I
THREE
SPECIFICALLY
PROTECTED
HALF-DUPLEX BI-DIRECTIONAL
BUFFERED I/O LINES TO CARD
CONTACTS C4, C7 AND C8
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DC/DC CONVERTER FOR V
CC
GENERATION SEPARATELY POWERED
FROM A 5 V 20% SUPPLY (V
DDP
AND
PGND)
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3 OR 5 V 5% REGULATED CARD SUPPLY
VOLTAGE (V
CC
) WITH APPROPRIATE
DECOUPLING HAS THE FOLLOWING
CAPABILITIES:
I
CC
< 80 mA at V
DDP
= 4 to 6.5 V
HANDLES CURRENT SPIKES OF 40 nAs
UP TO 20MHz
CONTROLS RISE AND FALL TIMES
FILTERED OVERLOAD DETECTION AT
APPROXIMATELY 120 mA
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THERMAL AND SHORT-CIRCUIT
PROTECTION ON ALL CARD CONTACTS
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AUTOMATIC ACTIVATION AND
DEACTIVATION SEQUENCES; INITIATED
BY SOFTWARE OR BY HARDWARE IN THE
EVENT OF A SHORT-CIRCUIT, CARD
TAKE-OFF, OVERHEATING, V
DD
OR V
DDP
DROP-OUT
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ENHANCED ESD PROTECTION ON CARD
SIDE (>6 kV)
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26 MHz INTEGRATED CRYSTAL
OSCILLATOR
I
CLOCK GENERATION FOR CARDS UP TO
20 MHz (DIVIDED BY 1, 2, 4 OR 8
THROUGH CLKDIV1 AND CLKDIV2
SIGNALS) WITH SYNCHRONOUS
FREQUENCY CHANGES
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NON-INVERTED CONTROL OF RST VIA PIN
RSTIN
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ISO 7816, GSM11.11 AND EMV (PAYMENT
SYSTEMS) COMPATIBILITY
I
SUPPLY SUPERVISOR FOR SPIKE-KILLING
DURING POWER-ON AND POWER-OFF
AND POWER-ON RESET (THRESHOLD
FIXED INTERNALLY OR EXTERNALLY BY A
RESISTOR BRIDGE)
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BUILT-IN DEBOUNCE ON CARD
PRESENCE CONTACTS
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ONE MULTIPLEXED STATUS SIGNAL OFF
DESCRIPTION
The ST8024 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. 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: Order Codes
(*) Available on Request.
Type
Temperature
Range
Package
Comments
ST8024CD
-25 to 85 C
SO-28 (Tube)
27 parts per tube / 12 tube per box
ST8024CDR
-25 to 85 C
SO-28 (Tape & Reel)
1000 parts per reel
ST8024CTR (*)
-25 to 85 C
TSSOP28 (Tape & Reel)
2500 parts per reel
ST8024
SMARTCARD INTERFACE
This is preliminary information on a new product now in development. Details are subject to change without notice.
SOP
TSSOP
PRODUCT PREVIEW
Rev. 1
ST8024
2/23
Figure 1: Block Diagram
ST8024
3/23
Figure 2: Pin Configuration
Table 2: Pin Description
PlN N
SYMBOL
NAME AND FUNCTION
1
CLKDIV1
Control of CLK Frequency
2
CLKDIV2
Control of CLK Frequency
3
5V/3V
V
CC
selection pin.
4
PGND
Power Ground for Step-Up converter
5
C1+
External Cap. for Step-Up converter
6
V
DDP
Power Supply for Step-Up converter
7
C1-
External Cap. Step-Up converter
8
V
UP
Output of 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 11k
pull-up resistor connected to V
CC
)
12
AUX2
Auxiliary line to and from card (C8) (internal 11k
pull-up resistor connected to V
CC
)
13
AUX1
Auxiliary line to and from card (C4) (internal 11k
pull-up resistor connected to V
CC
)
14
CGND
Ground for card signal (C5)
15
CLK
Clock to card (C3)
16
RST
Card Reset (C2)
17
V
CC
Supply Voltage for the card (C1)
18
PORADJ
Deactivation threshold selector pin (under voltage lock-out)
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 11k
pull-up resistor connected to V
DD
)
27
AUX1UC
Non-inverting Receiver Input (internal 11k
pull-up resistor connected to V
DD
)
28
AUX2UC
Non-inverting Receiver Input (internal 11k
pull-up resistor connected to V
DD
)
ST8024
4/23
Table 3: Absolute Maximum Ratings
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.
Note 2: Method 3015 (HBM, 1500
, 100 pF) 3 positive pulses and 3 negative pulses on each pin referenced to ground.
Table 4: Thermal Data
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
V
DD,
V
DDP
Supply Voltage
-0.3
7
V
V
n1
Voltage on pins XTAL1, XTAL2, 5V/3V, RSTIN, AUX2UC,
AUX1UC, I/OUC, CLKDIV1, CLKDIV2, PORADJ, CMDVCC,
PRES, PRES and OFF
-0.3
V
DD
+ 0.3
V
V
n2
Voltage on card contact pins I/O, RST, AUX1, AUX2 and CLK
-0.3
V
CC
+ 0.3
V
V
n3
Voltage on pins V
UP
, S1 and S2
9
V
ESD1
MIL-STD-883 class 3 on card contact pins, PRES and PRES
(Note 1, 2)
-6
6
kV
ESD2
MIL-STD-883 class 2 on C contact pins and RSTIN (Note 1, 2)
-2
2
kV
Symbol
Parameter
Condition
Value
Unit
R
thj-amb
Thermal Resistance Junction-ambient Temperature
In free air
70
K/W
Symbol
Parameter
Min.
Typ.
Max.
Unit
T
A
Temperature Range
-25
85
C
ST8024
5/23
Table 5: Electrical Characteristics Over Recommended Operating Conditions (V
DD
= 3.3V, V
DDP
=
5V, f
XTAL
= 10MHz, unless otherwise noted. Typical values are to T
a
= 25C)
Table 6: Step-up Converter (V
DD
= 3.3V, V
DDP
= 5V, f
XTAL
= 10MHz, unless otherwise noted. Typical
values are to T
a
= 25C)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Supply Voltage
2.7
6.5
V
V
DDP
Supply Voltage for the
voltage doubler
V
CC
= 5V; |I
CC
| < 80 mA
4.0
5
6.5
V
V
CC
= 5V; |I
CC
| < 20 mA
3.0
6.5
I
DD
Supply Current
Card Inactive
1.2
mA
Card Active; f
CLK
= f
XTAL
; C
L
= 30pF
1.5
I
DDP
DC/DC converter Supply
Current
Inactive mode
0.1
mA
Active mode; f
CLK
= f
XTAL
; C
L
= 30pF;
|I
CC
| = 0
10
V
CC
= 5V; |I
CC
| = 80 mA
200
V
CC
= 3V; |I
CC
| = 65 mA
100
V
th2
Falling Threshold Voltage
on V
DD
no external resistors at pin PORADJ;
V
DD
level falling
2.35
2.45
2.55
V
V
HYS2
Hysteresis of Threshold
Voltage V
th2
no external resistors at pin PORADJ
50
100
150
mV
V
th(ext)rise
External rising Threshold
Voltage on V
DD
external resistor bridge at pin PORADJ;
V
DD
level rising
1.18
1.21
1.24
V
V
th(ext)fall
External falling Threshold
Voltage on V
DD
external resistor bridge at pin PORADJ;
V
DD
level falling
1.12
1.15
1.18
V
V
HYS(ext)
Hysteresis of Threshold
Voltage V
th(ext)
external resistor bridge at pin PORADJ
30
60
90
mV
V
HYS(ext)
Hysteresis of Threshold
Voltage V
th(ext)
variation
with temperature
external resistor bridge at pin PORADJ
0.25
mV/K
t
W
Width of internal Power-On
reset pulse
no external resistor at pin PORADJ
4
8
12
ms
external resistor bridge at pin PORADJ
8
16
24
I
L
Leakage current on pin
PORADJ
V
PORADJ
< 0.5 V
-0.1
4
10
A
V
PORADJ
> 1.0 V
-1
1
P
TOT
Total power dissipation
Continuous operation; T
a
= -25 to 85C
0.56
W
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
f
CLK
Clock Frequency
Card active
2.2
3.2
MHz
V
th(vd-vf)
Threshold voltage for
Step-up Converter to
change to voltage follower
5 V card
5.2
5.8
6.2
V
3 V card
3.8
4.1
4.4
V
UP(av)
Output Voltage on pin V
UP
(average value)
V
CC
= 5 V
5.2
5.7
6.2
V
V
CC
= 3 V; V
DDP
= 3.3 V
3.5
3.9
4.3
Document Outline
- Table 1: Order Codes
- Figure 1: Block Diagram
- Figure 2: Pin Configuration
- Table 2: Pin Description
- Table 3: Absolute Maximum Ratings
- Table 4: Thermal Data
- Table 5: Electrical Characteristics Over Recommended Operating Conditions (VDD = 3.3V, VDDP = 5V,...
- Table 6: Step-up Converter (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherwise noted. Typical...
- Table 7: Card Supply Voltage Characteristics (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherw...
- Table 8: Crystal Connection (PINS XTAL1 AND XTAL2) (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless ...
- Table 9: Data Lines (PINS I/O, I/OUC, AUX1, AUX2, AUX1UC AND AUX2UC) (VDD = 3.3V, VDDP = 5V, fXTA...
- Table 10: Data Lines To Card Reader (PINS I/O, AUX1 AND AUX2 With Integrated 11 kW PULL-UP Resist...
- Table 11: Data Lines To Microcontroller (PINS I/OUC, AUX1UC AND AUX2UC; With Integrated 11 kW PUL...
- Table 12: Internal Oscillator (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherwise noted. Typi...
- Table 13: Reset Output To Card Reader (PIN RST) (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless oth...
- Table 14: Clock Output To Card Reader (PIN CLK) (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless oth...
- Table 15: Control Inputs (PINS CLKDIV1, CLKDIV2, CMDVCC, RSTIN AND 5V/3V (VDD = 3.3V, VDDP = 5V, ...
- Table 16: Card Presence Inputs (PINS PRES AND PRES) (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless...
- Table 17: Interrupt Output (PIN OFF NMOS Drain With Integrated 20 kW PULL-UP Resistor To VDD); (V...
- Table 18: Protection And Limitation (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherwise noted...
- Table 19: Timing (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherwise noted. Typical values ar...
- Figure 3: Definition of output and input transition times
- Figure 4: Voltage supervisor
- Table 20: Clock frequency selection; (note 1)
- Table 21: Card presence indicator
- Figure 5: Activation sequence using RSTIN and CMDVCC
- Figure 6: Activation sequence at t3
- Figure 7: Deactivation sequence
- Figure 8: Behavior of OFF, CMDVCC, PRES and VCC
- Figure 9: Emergency deactivation sequence (card extraction)
- Figure 10: Application Diagram
- Table 22: Revision History
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