MAXIM DS8005 Technical data
General Description
The DS8005 dual smart card interface is a low-cost,
dual analog front-end for an IC card reader interface
that needs to communicate with two smart cards in a
mutually exclusive fashion. The analog interface is
designed for use in ISO 7816, EMV®, and B-CAS applications. The device is functionally similar to two
DS8024s with external multiplexing to select the active
interface, but also includes low power and 1.8V card
support. Additionally, the device is designed for applications where the C4/C8 (AUX1/AUX2) contacts are not
required on either card interface.
The device is provided in a 28-pin SO package. The
pinout is backwards compatible with the DS8313,
allowing applications to use the same footprint and
PCB for applications that communicate with either one
or two smart cards.
The device is designed to be used with microcontrollers that contain an ISO 7816 UART, or have the
bandwidth to run this protocol in software by bit-banging IO ports. If the microcontroller does not have the
capability of running the ISO 7816 UART, the DS8007 is
the more appropriate product selection.
Applications
Set-Top Box Conditional Access
Telecommunications
Pay Television
Access Control
Financial Terminals
Features
♦ Analog Interface and Level Shifting for IC Card
Communication
♦ ±8kV (min) ESD (HBM) Protection on Card Interfaces
♦ Ultra-Low Stop-Mode Current, Less than 10nA
Typical
♦ Internal IC Card Supply-Voltage Generation
5.0V ±5%, 80mA (max)
3.0V ±8%, 65mA (max)
1.8V ±10%, 30mA (max)
♦ Automatic Card Activation and Deactivation
Controlled by Dedicated Internal Sequencer
♦ I/O Lines from Host Directly Level Shifted for
Smart Card Communication
♦ Flexible Card Clock Generation, Supporting
External Crystal Frequency Divided by 1, 2, 4, or 8
♦ High-Current, Short-Circuit and High-Temperature
Protection
♦ Low Active-Mode Current
♦ Internal Multiplexing Allows One ISO 7816 UART
Implementation to Control Two Smart Card
Sockets
DS8005
Smart Card Interface
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-5257; Rev 0; 4/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE PIN-PACKAGE
DS8005-RRX+ -40°C to +85°C 28 SO
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Application Circuit appears at end of data sheet.
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.maxim-ic.com/errata
.
EMV is a registered trademark of EMVCo LLC.
Selector Guide
PART
DS8005-RRX+ 1.8V, 3V, 5V Yes Yes Positive 2
CARD VOLTAGES
SUPPORTED
LOW STOP-MODE
POWER
LOW ACTIVE-
MODE POWER
PRES_ POLARITY V
DDA
INPUTS
DS8005
Smart Card Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
(VDD= +3.3V, V
DDA
= +5.0V, TA= +25°C, unless otherwise noted. All specifications apply to the device, unless otherwise noted in
the CONDITIONS column.) (Note 1)
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.
Voltage Range on VDDRelative to GND ...............-0.5V to +6.5V
Voltage Range on V
DDA
Relative to GND .............-0.5V to +6.5V
Voltage Range on CLKA, RSTA, I/OA ......-0.5V to (V
CCA
+ 0.5V)
Voltage Range on CLKB, RSTB, I/OB ......-0.5V to (V
CCB
+ 0.5V)
Voltage Range on All Other Pins
Relative to GND.......................................-0.5V to (V
DD
+ 0.5V)
Maximum Junction Temperature .....................................+125°C
Maximum Power Dissipation Range (T
A
= -25°C to +85°C)..700mW
Storage Temperature Range ............................-55°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
POWER SUPPLY
Digital Supply Voltage VDD 2.7 6.0 V
Card Voltage-Generator Supply Voltage V
Reset Voltage Thresholds
CURRENT CONSUMPTION
Active VDD Current 5V Cards
(Including 80mA Draw from 5V Card)
Active VDD Current 5V Cards (Current
Consumed by Device Only)
Active VDD Current 3V Cards
(Including 65mA Draw from 3V Card)
Active VDD Current 3V Cards (Current
Consumed by Device Only)
Active VDD Current 1.8V Cards
(Including 30mA Draw from 1.8V Card)
Active VDD Current 1.8V Cards (Current
Consumed by Device Only)
Inactive- Mode Current I
Stop-Mode Current I
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Must be VDD 4.75 6.0 V
DDA
V
Threshold voltage (falling) 2.20 2.45 2.65 V
TH2
Hy steresis 50 100 200 mV
V
HYS2
I
DD_50V
I
DD_IC
I
DD_30V
I
DD_IC
I
DD_18V
I
DD_IC
DD
DD_STOP
ICC = 80mA, f
f
= 10MHz, V
CLK
ICC = 80mA, f
f
= 10MHz, V
CLK
ICC = 65mA, f
= 10MHz, V
f
CLK
ICC = 65mA, f
= 10MHz, V
f
CLK
ICC = 30mA, f
= 10MHz, V
f
CLK
ICC = 30mA, f
= 10MHz, V
f
CLK
Card inactive, active-high PRES_,
device not in stop mode
= 20MH z,
XTAL
DDA
= 20MHz,
XTAL
= 5.0V (Note 2)
DDA
= 20MH z,
XTAL
DDA
= 20MHz,
XTAL
= 5.0V (Note 2)
DDA
= 20MH z,
XTAL
DDA
= 20MHz,
XTAL
= 5.0V (Note 2)
DDA
= 5.0V
= 5.0V
= 5.0V
80.75 85 mA
0.75 5 mA
65.75 70 mA
0.75 5 mA
30.75 40 mA
0.75 5 mA
50 400 μA
Device in ultra-low-power stop
mode (CMDVCC, 5V/3V, and 1_8V
0.01 2 μA
set to logic 1) (Note 3)
DS8005
Smart Card Interface
_______________________________________________________________________________________ 3
RECOMMENDED DC OPERATING CONDITIONS (continued)
(VDD= +3.3V, V
DDA
= +5.0V, TA= +25°C, unless otherwise noted. All specifications apply to the device, unless otherwise noted in
the CONDITIONS column.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CLOCK SOURCE
Crystal Frequency f
XTAL1 Operating Condition s
External Capacitance for Crystal
Internal Oscillator f
External crystal (Note 1) 0 20 MHz
XTAL
f
XTAL1
V
IL_XTAL1
V
IH_XTAL1
C
XTAL1
C
XTAL2
INT
(Note 1) 0 20 MHz
Low-level input on XTAL1 -0.3
High-level input on XTAL1
,
15 pF
0.7 x
V
DD
0.3 x
V
DD
VDD +
0.3
2.2 2.7 3.4 MHz
V
SHUTDOWN TEMPERATURE
Shutdown Temperature TSD +150 °C
RSTA AND RSTB PINS
Card-Inactive Mode
Card-Active Mode
Output Low Voltage V
Output Current I
Output Low Voltage V
Output High
Voltage
V
Rise Time t
Fal l Time t
Current Limitation I
RSTIN to RST Delay t
RST(LIMIT)
D(RSTIN-RST)
OL_RST1
I
OL_RST1
V
I
OL_RST2
I
OH_RST2
CL= 30pF (Note 1) 0.1 μs
R_RST
CL= 30pF (Note 1) 0.1 μs
F_RST
= 1mA 0.3 V
OL_RST
= 0V -1 mA
OL_RST
= 200μA 0.3 V
OL_RST
V
-
OH_RST
= -200μA
CC
0.5
V
-20 +20 mA
2 μs
CLKA AND CLKB PINS
Card-Inactive Mode
Card-Active Mode
V
CCA
AND V
PINS
CCB
Card-Inactive Mode
Output Low Voltage V
Output Current I
Output Low Voltage V
Output High
Voltage
Rise Time t
Fal l Time t
Current Limitation I
Cloc k Frequency f
OL_CLK1 IOLCLK
V
OL_CLK1
I
OL_CLK2
V
OH_CLK2 IOHCLK
CL= 30pF (Notes 1, 4) 8 ns
R_CLK
CL= 30pF (Notes 1, 4) 8 ns
F_CLK
CLK(LIMIT)
-75 +75 mA
Operational 0 10 MHz
CLK
Duty Factor C
Slew Rate SR C
Output Low Voltage V
Output Current I
I
CC1
VCC = 0V 0 -1 mA
CC1
= 1mA 0.3 V
= 0V -1 mA
OLCLK
= 200μA 0.3 V
OLCLK
V
-
= -200μA
= 30pF 45 55 %
L
= 30pF (Note 1) 0.2 V/ns
L
= 1mA 0.3 V
CC
CC
0.5
V
DS8005
Smart Card Interface
4 _______________________________________________________________________________________
RECOMMENDED DC OPERATING CONDITIONS (continued)
(VDD= +3.3V, V
DDA
= +5.0V, TA= +25°C, unless otherwise noted. All specifications apply to the device, unless otherwise noted in
the CONDITIONS column.) (Note 1)
Card-Active Mode
DATA LINES (I/O_ AND I/OIN)
I/O_ I/OIN Fall ing Edge Delay t
Pullup Pulse Active Time tPU (Note 1) 100 ns
Maximum Frequency f
Input Capacitance CI 10 pF
I/OA AND I/OB PINS
Card-Inactive Mode
Card-Active Mode
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Device: I
= 4.75V (Note 1)
V
DDA
Device: I
Device: I
Device: I
< 30mA,
CC(5V)
< 80mA 4.75 5 5.25
CC(5V)
< 65mA 2.78 3 3.24
CC(3V)
CC(1. 8V)
< 30mA 1.64 1.8 1.98
4.65 5 5.25
5V card; current pulses of 40nC
Output Low Voltage V
CC2
with I < 200mA, t < 400ns,
4.6 5.4
V
f < 20MHz
3V card; current pulses of 24nC
with I < 200mA, t < 400ns,
2.75 3.25
f < 20MHz
1.8V card; current pulse s of 12nC
with I < 200mA, t < 400ns,
1.62 1.98
f < 20MHz
Output Current I
Shutdown Current
Threshold
I
Slew Rate V
D(IO-I OIN)
Output Low Voltage V
Output Current I
Internal Pullup
Resistor
R
Output Low Voltage V
Output High
Voltage
V
Output Rise/Fall
Time
Input Low Voltage V
Input High Voltage V
V
CC2
V
V
CC(SD)
CCSR
(Note 1) 120 mA
Up/down; C < 300nF (Note 5) 0.05 0.16 0.22 V/μs
(Note 1) 200 ns
1 MHz
IOMAX
I
OL_IO1
V
OL_I O1
To VCC 6 11 19 k
PU_I O
OL_IO2 IOL_I O
OH_IO2
t
OT
IL_IO
IH_IO
I
I
CL= 30pF (Note 1) 0.1 μs
-0.3 +0.8
1.5 V
= 0 to 5V -80
CC(5V)
= 0 to 3V -65
CC(3V)
CC(1.8V)
OL_I O
OL_IO
= 0 to 1.8V -30
= 1mA 0.3 V
= 0V 0 -1 mA
= 1mA 0.3 V
= < -20μA 0.8 x VCC
OH_IO
= < -40μA (3V/5V) 0.75 x VCC
OH_IO
mA
V
V
CC
DS8005
Smart Card Interface
_______________________________________________________________________________________ 5
RECOMMENDED DC OPERATING CONDITIONS (continued)
(VDD= +3.3V, V
DDA
= +5.0V, TA= +25°C, unless otherwise noted. All specifications apply to the device, unless otherwise noted in
the CONDITIONS column.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Card-Active Mode
Input Low Current I
Input High Current I
IL_IO
IH_IO
Input Rise/Fa ll Time tIT 1.2 μs
Current Limitation I
IO(LIMIT)
V
= 0V 700 μA
IL_IO
V
= VCC -20 +20 μA
IH_IO
CL= 30pF -15 +15 mA
I/OIN PIN
Output Low Voltage VOL IOL = 1mA 0.3 V
Output High Voltage VOH IOH < -40μA
0.75 x
V
DD
VDD +
0.1
V
Output Rise/Fall Time tOT CL= 30pF, 10% to 90% 0.1 μs
Input Low Voltage VIL -0.3
Input High Voltage V
Input Low Current I
Input High Current I
Input Ri se/Fal l Time tIT V
IH
VIL = 0V 700 μA
IL_IO
VIH = VDD -10 +10 μA
IH_IO
to VIH 1.2 μs
IL
0.7 x
V
DD
+0.3 x
V
DD
VDD +
0.3
V
V
Integrated Pullup Resistor RPU Pullup to VDD 6 11 19 k
CONTROL PINS (CLKDIV1, CLKDIV2, CMDVCC, RSTIN, 5V/3V, 1_8V)
Input Low Voltage V
Input High Voltage V
Input Low Current I
Input High Current I
IH_IO
IL
IH
IL_IO
-0.3
0.7 x
V
DD
0 < VIL < VDD -5 +5 μA
0 < VIH < VDD -5 +5 μA
+0.3 x
V
DD
VDD +
0.3
V
V
INTERRUPT OUTPUT PINS (OFF AND OFF2)
Output Low Voltage VOL IOL = 2mA 0.3 V
Output High Voltage VOH IOH = -15μA
0.75 x
V
DD
V
Integrated Pullup Resistor RPU Pullup to VDD 12 24 38 k
PRESA AND PRESB PINS
Input Low Voltage V
Input High Voltage V
Input Low Current I
Input High Current I
IL_PRES
IH_PRES
IL_PRES
IH_PRES
0.7 x
V
DD
V
V
= 0V -5 +5 μA
IL_PRES
= VDD 10 μA
IH_PRES
0.3 x
V
DD
V
V
DS8005
Smart Card Interface
6 _______________________________________________________________________________________
RECOMMENDED DC OPERATING CONDITIONS (continued)
(VDD= +3.3V, V
DDA
= +5.0V, TA= +25°C, unless otherwise noted. All specifications apply to the device, unless otherwise noted in
the CONDITIONS column.) (Note 1)
Note 1: Operation guaranteed at -40°C and +85°C but not tested.
Note 2: I
DD_IC
measures the amount of current used by the device to provide the smart card current minus the load.
Note 3: Stop mode is enabled by setting CMDVCC, 5V/3V, and 1_8V to a logic-high.
Note 4: Parameters are guaranteed to meet all ISO 7816, GSM11-11, and EMV 2000 requirements. For the 1.8V card, the maximum
rise 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 minimum
slew rate is 0.05V/µs and the maximum slew rate is 0.5V/µs.
TIMING
Activation Time t
Deactivation Time t
CLK_ to Card Start
Time
PRES Debounce Time t
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
50 160 220 μs
ACT
50 80 100 μs
DEACT
Window Start t3 50 95 130
Window End t
140 160 220
5
DEB OUNCE
5 8 11 ms
μs
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