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DS8023-RJX+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
DS8023
Smart Card Interface
4 _______________________________________________________________________________________
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DD
= +3.3V, V
DDA
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC(5V)
= 0 to 5V -80
V
CC(3V)
= 0 to 3V -65
Output Current I
CC2
V
CC(1.8V)
= 0 to 1.8V -30
mA
Shutdown Current
Threshold
I
CC(SD)
120 mA
Card-Active Mode
Slew Rate V
CCSR
Up/down, C < 300nF (Note 5) 0.05 0.16 0.22 V/μs
DATA LINES (I/O AND I/OIN)
I/O I/OIN Falling Edge Delay t
D(IO-IOIN)
200 ns
Pullup Pulse Active Time t
PU
100 ns
Maximum Frequency f
IOMAX
1 MHz
Input Capacitance C
I
10 pF
I/O, AUX1, AUX2 PINS
Output Low Voltage V
OL_IO1
I
OL_IO
= 1mA 0 0.3 V
Output Current I
OL_IO1
V
OL_IO
= 0V 0 -1 mA
Card-Inactive Mode
Internal Pullup
Resistor
R
PU_IO
To V
CC
7 11 15 k
Output Low Voltage V
OL_IO2
I
OL_IO
= 1mA 0 0.3 V
Output High
Voltage
V
OH_IO2
I
OH_IO
= < -40μA (3V/5V) 0.75 x V
CC
V
CC
V
Output Rise/Fall
Time
t
OT
C
L
= 30pF (Note 3) 0.1 μs
Input Low Voltage V
IL_IO
-0.3 +0.8
Input High Voltage V
IH_IO
1.5 V
CC
V
Input Low Current I
IL_IO
V
IL_IO
= 0V 700 μA
Input High Current I
IH_IO
V
IH_IO
= V
CC
20 μA
Input Rise/Fall Time t
IT
1.2 μs
Current Limitation I
IO(LIMIT)
C
L
= 30pF -15 +15 mA
Card-Active Mode
Current When
Pullup Active
I
PU
C
L
= 80pF, V
OH
= 0.9 x V
DD
-1 mA
I/OIN, AUX1IN, AUX2IN PINS
Output Low Voltage V
OL
I
OL
= 1mA 0 0.3 V
No load
0.9 x
V
DD
V
DD
+
0.1
Output High Voltage V
OH
I
OH
< -40μA
0.75 x
V
DD
V
DD
+
0.1
V
Output Rise/Fall Time t
OT
C
L
= 30pF, 10% to 90% 0.1 μs
Input Low Voltage V
IL
-0.3
0.3 x
V
DD
V
Input High Voltage V
IH
0.7 x
V
DD
V
DD
+
0.3
V
DS8023
Smart Card Interface
_______________________________________________________________________________________ 5
RECOMMENDED DC OPERATING CONDITIONS (continued)
(V
DD
= +3.3V, V
DDA
= +5.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Low Current I
IL_IO
V
IL
= 0V 600 μA
Input High Current I
IH_IO
V
IH
= V
DD
10 μA
Input Rise/Fall Time t
IT
V
IL
to V
IH
1.2 μs
Integrated Pullup Resistor R
PU
Pullup to V
DD
7 11 15 k
Current When Pullup Active I
PU
C
L
= 30pF, V
OH
= 0.9 x V
DD
-1 mA
CONTROL PINS (CLKDIV1, CLKDIV2, CMDVCC, RSTIN, 5V/3V)
Input Low Voltage V
IL
-0.3
0.3 x
V
DD
V
Input High Voltage V
IH
0.7 x
V
DD
V
DD
+
0.3
V
Input Low Current I
IL_IO
0 < V
IL
< V
DD
5 μA
Input High Current I
IH_IO
0 < V
IH
< V
DD
5 μA
INTERRUPT OUTPUT PIN (OF F)
Output Low Voltage V
OL
I
OL
= 2mA 0 0.3 V
Output High Voltage V
OH
I
OH
= -15μA
0.75 x
V
DD
V
Integrated Pullup Resistor R
PU
Pullup to V
DD
15 24 33 k
PRES, PRES PINS
Input Low Voltage V
IL_PRES
0.3 x
V
DD
V
Input High Voltage V
IH_PRES
0.7 x
V
DD
V
Input Low Current I
IL_PRES
V
IL_PR ES
= 0V 5 μA
Input High Current I
IH_PRES
V
IH_PRES
= V
DD
5 μA
TIMING
Activation Time t
ACT
160 μs
Deactivation Time t
DEACT
80 μs
Window Start t
3
95
CLK to Card Start
Time
Window End t
5
160
μs
PRES/PRES Debounce Time t
DEBOUNCE
8 ms
Note 1: Operation guaranteed at T
A
= -40°C and T
A
= +85°C, but not tested.
Note 2: I
DD_IC
measures the amount of current used by the DS8023 to provide the smart card current minus the load.
Note 3: Stop mode is enabled by setting CMDVCC, 5V/3V, and 1_8V to 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 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.
DS8023
Smart Card Interface
6 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1, 2
CLKDIV1,
CLKDIV2
Clock Divider. Determines the divided-down input clock frequency (presented at XTAL1 or from a
crystal at XTAL1 and XTAL2) on the CLK output pin. Dividers of 1, 2, 4, and 8 are available.
3 5V/3V
5V/3V Selection Pin. Allows selection of 5V or 3V for communication with an IC card. Logic-high
selects 5V operation; logic-low selects 3V operation. See Table 3 for a complete description of
choosing card voltages.
4 PGND Analog Ground
5, 7 CP2, CP1
Step-Up Converter Contact. Charge-pump capacitor. Connect a 100nF capacitor (ESR < 100m)
between CP1 and CP2.
6 V
DDA
Charge-Pump Supply. Must be equal to or higher than V
DD
. Connect a supply of at least 3.0V.
8 V
UP
Charge-Pump Output. Connect a 100nF capacitor (ESR < 100m) between V
UP
and GND.
9 PRES
Card Presence Indicator. Active-low card presence inputs. When the presence indicator becomes
active, a debounce timeout begins. After 8ms (typ) the OFF signal becomes active.
10 PRES
Card Presence Indicator. Active-high card presence inputs. When the presence indicator becomes
active, a debounce timeout begins. After 8ms (typ) the OFF signal becomes active.
11 I/O Smart Card Data-Line Output. Card data communication line, contact C7.
12, 13
AUX2,
AUX1
Smart Card Auxiliary Line (C4, C8) Output. Data line connected to card reader contacts C4 (AUX1)
and C8 (AUX2).
14 CGND Smart Card Ground
15 CLK Smart Card Clock. Card clock, contact C3.
16 RST Smart Card Reset. Card reset output from contact C2.
17 V
CC
Smart Card Supply Voltage. Decouple to CGND (card ground) with 2 x 100nF or 100 + 220nF
capacitors (ESR < 100m).
18 1_8V
1.8V Operation Selection. Active-high selection for 1.8V smart card communication. An active-high
signal on this pin overrides any setting on the 5V/3V pin.
19 CMDVCC Activation Sequence Initiate. Active-low input from host.
20 RSTIN Card Reset Input. Reset input from the host.
21 V
DD
Supply Voltage
22 GND Digital Ground
23 OFF Status Output. Active-low interrupt output to the host. Use a 20k integrated pullup resistor to V
DD
.
24, 25
XTAL1,
XTAL2
Crystal/Clock Input. Connect an input from an external clock to XTAL1 or connect a crystal across
XTAL1 and XTAL2. For the low idle-mode current variant, an external clock must be driven on
XTAL1.
26 I/OIN I/O Input. Host-to-interface chip data I/O line.
27, 28
AUX1IN,
AUX2IN
C4/C8 Input. Host-to-interface I/O line for auxiliary connections to C4 and C8.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

DS8023-RJX+

Mfr. #:
Buy DS8023-RJX+
Manufacturer:
Maxim Integrated
Description:
Interface - Specialized Smart Card Interface
Lifecycle:
New from this manufacturer.
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