The DS8023 smart card interface IC is a low-cost, low-
power, analog front-end for a smart card reader designed
for all ISO 7816, EMV*, and GSM11-11 applications. The
DS8023 supports 5V, 3V, and 1.8V smart cards, and pro-
vides an option for ultra-low stop-mode power consump-
tion. The DS8023 is available in 28-pin TSSOP and SO
packages, and can often be used as a replacement for
the TDA8024 with little or no application changes.
The DS8023 is designed to interface between a system
microcontroller and the smart card interface, providing
all power supply, protection, and level shifting required
for IC card applications.
Features
o
Analog Interface and Level Shifting for IC Card
Communication
o
±8kV (min) ESD (IEC) Protection on Card Interface
Pins
o
Ultra-Low Stop-Mode Current, Less Than 10nA (typ)
o
Internal IC Card-Supply Voltage Generation
5.0V ±5%, 80mA (max)
3.0V ±8%, 65mA (max)
1.8V ±10%, 30mA (max)
o
Automatic Card Activation and Deactivation
Controlled by Dedicated Internal Sequencer
o
I/O Lines from Host Directly Level Shifted for
Smart Card Communication
o
Flexible Card Clock Generation, Supporting
External Crystal Frequency Divided by 1, 2, 4, or 8
o
High-Current/Short-Circuit and High-Temperature
Protection
Applications
Set-Top Box Conditional Access
Access Control
Banking Applications
POS Terminals
Debit/Credit Payment Terminals
PIN Pads
Automated Teller Machines
Telecommunications
Pay/Premium Television
Pin Configuration
TOP VIEW
CLKDIV1 1
CLKDIV2 2
5V/3V 3
PGND 4
CP2 5
V
DDA
6
CP1 7
V
UP
8
PRES 9
PRES 10
28 AUX2IN
27 AUX1IN
26 I/OIN
25 XTAL2
24 XTAL1
Ordering Information
PART
DS8023-RJX+
DS8023-RRX+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 TSSOP
28 SO
Note:
Contact the factory for availability of other variants and
package options.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
DS8023
23 OFF
22 GND
21 V
DD
20 RSTIN
19 CMDVCC
18 1_8V
17 V
CC
16 RST
15 CLK
Selector Guide appears at end of data sheet.
I/O 11
AUX2 12
AUX1 13
CGND 14
SO/TSSOP
*EMV
is a trademark owned by EMVCo LLC. EMV Level 1 library and hardware reference design available. Contact factory for details.
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be
simultaneously available through various sales channels. For information about device errata, go to:
www.maximintegrated.com/errata.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6380; Rev 1; 4/13
DS8023
Smart Card Interface
ABSOLUTE MAXIMUM RATINGS
Voltage Range on V
DD
Relative to GND ...............-0.5V to +6.5V
Voltage Range on V
DDA
Relative to PGND ...........-0.5V to +6.5V
Voltage Range on CP1, CP2, and V
UP
Relative to PGND...............................................-0.5V to +7.5V
Voltage Range on All Other Pins
Relative to GND......................................-0.5V to (V
DD
+ 0.5V)
Maximum Junction Temperature .....................................+125°C
Maximum Power Dissipation (T
A
= -40°C to +85°C) .......700mW
Storage Temperature Range .............................-55°C to +150°C
Soldering Temperature.........Refer to the IPC/JEDEC J-STD-020
Specification.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED DC OPERATING CONDITIONS
(V
DD
= +3.3V, V
DDA
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
POWER SUPPLY
Digital Supply Voltage
Card-Voltage-Generator Supply Voltage
Reset Voltage Thresholds
CURRENT CONSUMPTION
Active V
DD
Current 5V Cards
(Including 80mA Draw from 5V Card)
Active V
DD
Current 5V Cards
(Current Consumed by DS8023 Only)
Active V
DD
Current 3V Cards
(Including 65mA Draw from 3V Card)
Active V
DD
Current 3V Cards
(Current Consumed by DS8023 Only)
Active V
DD
Current 1.8V Cards
(Including 30mA Draw from 1.8V Card)
Active V
DD
Current 1.8V Cards
(Current Consumed by DS8023 Only)
Inactive-Mode Current
Stop-Mode Current
CLOCK SOURCE
Crystal Frequency
f
XTAL
f
XTAL1
XTAL1 Operating Conditions
V
IL_XTAL1
V
IH_XTAL1
External Capacitance for Crystal
Internal Oscillator
2
SYMBOL
V
DD
V
DDA
V
TH2
V
HYS2
CONDITIONS
MIN
2.7
TYP
MAX
6.0
6.0
6.0
UNITS
V
V
V
mV
V
CC
= 5V,
|I
CC
|
< 80mA
V
CC
= 5V,
|I
CC
|
< 30mA
Threshold voltage (falling)
Hysteresis
I
CC
= 80mA, f
XTAL
= 20MHz,
f
CLK
= 10MHz, V
DDA
= 5.0V
I
CC
= 80mA, f
XTAL
= 20MHz,
f
CLK
= 10MHz, V
DDA
= 5.0V (Note 2)
I
CC
= 65mA, f
XTAL
= 20MHz,
f
CLK
= 10MHz, V
DDA
= 5.0V
I
CC
= 65mA, f
XTAL
= 20MHz,
f
CLK
= 10MHz, V
DDA
= 5.0V (Note 2)
I
CC
= 30mA, f
XTAL
= 20MHz,
f
CLK
= 10MHz, V
DDA
= 5.0V
I
CC
= 30mA, f
XTAL
= 20MHz,
f
CLK
= 10MHz, V
DDA
= 5.0V (Note 2)
Card inactive
DS8023 in ultra-low-power stop
mode (Note 3)
External crystal
4.0
3.0
2.30
50
2.45
100
2.60
150
I
DD_50V
I
DD_IC
I
DD_30V
I
DD_IC
I
DD_18V
I
DD_IC
I
DD
I
DD_STOP
215
135
100
35
70
35
500
10
mA
mA
mA
mA
mA
mA
μA
nA
0
0
-0.3
0.7 x
V
DD
20
20
0.3 x
V
DD
V
DD
+
0.3
15
2.7
MHz
MHz
V
C
XTAL1
,
C
XTAL2
f
INT
pF
MHz
Maxim Integrated
DS8023
Smart Card Interface
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DD
= +3.3V, V
DDA
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SHUTDOWN TEMPERATURE
Shutdown Temperature
RST PIN
Card-Inactive Mode
Output Low Voltage
Output Current
Output Low Voltage
Output High
Voltage
Rise Time
Card-Active Mode
Fall Time
Shutdown Current
Threshold
Current Limitation
RSTIN to RST Delay
CLK PIN
Card-Inactive Mode
Output Low Voltage
Output Current
Output Low Voltage
Output High
Voltage
Rise Time
Card-Active Mode
Fall Time
Current Limitation
Clock Frequency
Duty Factor
Slew Rate
V
CC
PIN
Card-Inactive Mode
Output Low Voltage
Output Current
V
CC1
I
CC1
I
CC
= 1mA
V
CC
= 0V
I
CC(5V)
< 80mA
I
CC(3V)
< 65mA
I
CC(1.8V)
< 30mA
5V card: current pulses of 40nC
with I < 200mA, t < 400ns,
f < 20MHz
3V card: current pulses of 24nC
with I < 200mA, t < 400ns,
f < 20MHz
1.8V card: current pulses of 12nC
with I < 200mA, t < 400ns,
f < 20MHz
Maxim Integrated
SYMBOL
T
SD
V
OL_RST1
I
OL_RST1
V
OL_RST2
V
OH_RST2
t
R_RST
t
F_RST
I
RST(SD)
I
RST(LIMIT)
t
D(RSTIN-RST)
V
OL_CLK1
I
OL_CLK1
V
OL_CLK2
V
OH_CLK2
t
R_CLK
t
F_CLK
I
CLK(LIMIT)
f
CLK
SR
CONDITIONS
MIN
TYP
+150
MAX
UNITS
°C
I
OL_RST
= 1mA
V
O_LRST
= 0V
I
OL_RST
= 200μA
I
OH_RST
= -200μA
C
L
= 30pF
C
L
= 30pF
0
0
0
V
CC
-
0.5
0.3
-1
0.3
V
CC
0.1
0.1
-20
V
mA
V
V
μs
μs
mA
-20
+20
2
mA
μs
V
mA
V
V
ns
ns
mA
MHz
%
V/ns
I
OLCLK
= 1mA
V
OLCLK
= 0V
I
OLCLK
= 200μA
I
OHCLK
= -200μA
C
L
= 30pF (Note 4)
C
L
= 30pF (Note 4)
0
0
0
V
CC
-
0.5
0.3
-1
0.3
V
CC
8
8
-70
Operational
C
L
= 30pF
C
L
= 30pF
0
45
0.2
0
0
4.75
2.78
1.65
4.6
5.00
3.00
1.8
+70
10
55
0.3
-1
5.25
3.22
1.95
5.4
V
mA
Card-Active Mode
Output Low Voltage
V
CC2
V
2.75
3.25
1.62
1.98
3
DS8023
Smart Card Interface
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DD
= +3.3V, V
DDA
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Output Current
Card-Active Mode
Shutdown Current
Threshold
Slew Rate
DATA LINES (I/O AND I/OIN)
I/O
I/OIN Falling Edge Delay
t
D(IO-IOIN)
t
PU
f
IOMAX
C
I
Output Low Voltage
Card-Inactive Mode
Output Current
Internal Pullup
Resistor
Output Low Voltage
Output High
Voltage
Output Rise/Fall
Time
Input Low Voltage
Card-Active Mode
Input High Voltage
Input Low Current
Input High Current
Input Rise/Fall Time
Current Limitation
Current When
Pullup Active
I/OIN, AUX1IN, AUX2IN PINS
Output Low Voltage
V
OL
I
OL
= 1mA
No load
Output High Voltage
V
OH
I
OH
< -40μA
Output Rise/Fall Time
Input Low Voltage
Input High Voltage
t
OT
V
IL
V
IH
C
L
= 30pF, 10% to 90%
-0.3
0.7 x
V
DD
0
0.9 x
V
DD
0.75 x
V
DD
0.3
V
DD
+
0.1
V
V
DD
+
0.1
0.1
0.3 x
V
DD
V
DD
+
0.3
μs
V
V
V
V
OL_IO1
I
OL_IO1
R
PU_IO
V
OL_IO2
V
OH_IO2
t
OT
V
IL_IO
V
IH_IO
I
IL_IO
I
IH_IO
t
IT
I
IO(LIMIT)
I
PU
C
L
= 30pF
C
L
= 80pF, V
OH
= 0.9 x V
DD
-15
-1
V
IL_IO
= 0V
V
IH_IO
= V
CC
I
OL_IO
= 1mA
V
OL_IO
= 0V
To V
CC
I
OL_IO
= 1mA
I
OH_IO
= < -40μA (3V/5V)
C
L
= 30pF (Note 3)
-0.3
1.5
0
0
7
0
0.75 x V
CC
11
200
100
1
10
0.3
-1
15
0.3
V
CC
0.1
+0.8
V
CC
700
20
1.2
+15
ns
ns
MHz
pF
V
mA
k
V
V
μs
V
μA
μA
μs
mA
mA
Pullup Pulse Active Time
Maximum Frequency
Input Capacitance
I/O, AUX1, AUX2 PINS
I
CC(SD)
V
CCSR
Up/down, C < 300nF (Note 5)
0.05
SYMBOL
I
CC2
CONDITIONS
V
CC(5V)
= 0 to 5V
V
CC(3V)
= 0 to 3V
V
CC(1.8V)
= 0 to 1.8V
120
0.16
0.22
MIN
TYP
MAX
-80
-65
-30
mA
V/μs
mA
UNITS
4
Maxim Integrated
DS8023
Smart Card Interface
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DD
= +3.3V, V
DDA
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Input Low Current
Input High Current
Input Rise/Fall Time
Integrated Pullup Resistor
Current When Pullup Active
SYMBOL
I
IL_IO
I
IH_IO
t
IT
R
PU
I
PU
V
IL
= 0V
V
IH
= V
DD
V
IL
to V
IH
Pullup to V
DD
7
-1
0.3 x
V
DD
V
DD
+
0.3
5
5
0
0.75 x
V
DD
15
24
33
0.3 x
V
DD
0.7 x
V
DD
V
IL_PRES
= 0V
V
IH_PRES
= V
DD
160
80
95
160
8
5
5
0.3
11
CONDITIONS
MIN
TYP
MAX
600
10
1.2
15
UNITS
μA
μA
μs
k
mA
C
L
= 30pF, V
OH
= 0.9 x V
DD
CONTROL PINS (CLKDIV1, CLKDIV2,
CMDVCC,
RSTIN, 5V/3V)
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
INTERRUPT OUTPUT PIN (OFF)
Output Low Voltage
Output High Voltage
Integrated Pullup Resistor
PRES,
PRES
PINS
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
TIMING
Activation Time
Deactivation Time
CLK to Card Start
Time
Window Start
Window End
t
ACT
t
DEACT
t
3
t
5
t
DEBOUNCE
V
IL_PRES
V
IH_PRES
I
IL_PRES
I
IH_PRES
V
OL
V
OH
R
PU
I
OL
= 2mA
I
OH
= -15μA
Pullup to V
DD
V
IL
V
IH
I
IL_IO
I
IH_IO
0 < V
IL
< V
DD
0 < V
IH
< V
DD
-0.3
0.7 x
V
DD
V
V
μA
μA
V
V
k
V
V
μA
μA
μs
μs
μs
ms
PRES/PRES Debounce Time
Note 1:
Note 2:
Note 3:
Note 4:
Operation guaranteed at T
A
= -40°C and T
A
= +85°C, but not tested.
I
DD_IC
measures the amount of current used by the DS8023 to provide the smart card current minus the load.
Stop mode is enabled by setting
CMDVCC,
5V/3V, and 1_8V to logic-high.
Parameters are guaranteed to meet all ISO 7816, GSM11-11, and EMV 2000 requirements. For the 1.8V card, the maximum
rise time and fall time is 10ns.
Note 5:
Parameter is guaranteed to meet all ISO 7816, GSM11-11, and EMV 2000 requirements. For the 1.8V card, the minimimum
slew rate is 0.05V/µs and the maximum slew rate is 0.5V/µs.
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