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PDF DS8314 Data sheet ( Hoja de datos )
| Número de pieza | DS8314 | |
| Descripción | (DS8313 / DS8314) Smart Card Interface | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4655; Rev 1; 5/09
www.DataSheet4U.com
Smart Card Interface
General Description
The DS8313 smart card and SIM interface IC is a low-
cost, analog front-end for a smart card reader designed
for smart card applications that do not require the use
of the auxiliary card I/O contacts C4 and C8 (AUX1 and
AUX2). The DS8313 supports 5V, 3V, and 1.8V smart
cards. The absence of a charge pump reduces active
power consumption, and the DS8313 also supports an
ultra-low-power 10nA stop mode.
The DS8313 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.
The DS8314 is similar to the DS8313, but only uses one
analog (smart card) power supply. Therefore, the
device has reduced ability to provide power to smart
cards, but it is still sufficient for many applications,
allowing the DS8314 to drop into many TDA8024 sock-
ets without hardware changes.
The DS8313L and DS8314L use a negative polarity-pres-
ence detect instead of the default positive-polarity detect.
Both devices are available in a 28-pin SO package.
Applications
Pay/Premium Television
Access Control
Banking Applications
POS Terminals
Debit/Credit Payment Terminals
PIN Pads
Automated Teller Machines
Telecommunications
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
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS8313-RRX+
-40°C to +85°C
28 SO
DS8313L-RRX+* -40°C to +85°C
28 SO
DS8314-RRX+*
-40°C to +85°C
28 SO
DS8314L-RRX+* -40°C to +85°C
28 SO
Note: Contact the factory for availability of other variants and
package options.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
Typical Application Circuit, Pin Configuration, and Selector
Guide appear 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.
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
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Smart Card Interface
RECOMMENDED DC OPERATING CONDITIONS (continued)
(VDD = +3.3V, VDDA = +5.0V, TA = +25°C, unless otherwise noted. All specifications apply to both the DS8313 and DS8314, unless
otherwise noted in the CONDITIONS column.) (Note 1)
PARAMETER
Input Low Current
Input High Current
Card-Active Mode
Input Rise/Fall Time
Current Limitation
Current When
Pullup Active
I/OIN PIN
Output Low Voltage
SYMBOL
IIL_IO
IIH_IO
tIT
IIO(LIMIT)
IPU
VOL
Output High Voltage
VOH
Output Rise/Fall Time
tOT
Input Low Voltage
VIL
CONDITIONS
VIL_IO = 0
VIH_IO = VCC
CL = 30pF
CL = 80pF, VOH = 0.9 x VDD
IOL = 1mA
IOH < -40μA
CL = 30pF, 10% to 90%
Input High Voltage
VIH
Input Low Current
IIL_IO
VIL = 0
Input High Current
IIH_IO
VIH = VDD
Input Rise/Fall Time
tIT VIL to VIH
Integrated Pullup Resistor
RPU Pullup to VDD
Current When Pullup Active
IPU CL = 30pF, VOH = 0.9 x VDD
CONTROL PINS (CLKDIV1, CLKDIV2, CMDVCC, RSTIN, 5V/3V, 1_8V)
Input Low Voltage
VIL
Input High Voltage
Input Low Current
Input High Current
INTERRUPT OUTPUT PIN (OFF)
Output Low Voltage
Output High Voltage
Integrated Pullup Resistor
PRES PIN
Input Low Voltage
VIH
IIL_IO
IIH_IO
VOL
VOH
RPU
0 < VIL < VDD
0 < VIH < VDD
IOL = 2mA
IOH = -15μA
Pullup to VDD
VIL_PRES
Input High Voltage
VIH_PRES
MIN TYP MAX UNITS
600 μA
20 μA
1.2 μs
-15 +15 mA
-1 mA
0 0.3 V
0.75 x
VDD
VDD +
0.1
0.1
V
μs
0.3 x
-0.3 VDD V
0.7 x
VDD
VDD +
0.3
V
600 μA
10 μA
1.2 μs
9 11 13 k
-1 mA
-0.3
0.7 x
VDD
0.3 x
VDD
VDD +
0.3
5
5
V
V
μA
μA
0 0.3 V
0.75 x
VDD
V
16 24 32 k
0.7 x
VDD
0.3 x
VDD
V
V
_______________________________________________________________________________________ 5
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Smart Card Interface
CMDVCC
VCC
I/O
CLK
RSTIN
200ns
RST
I/OIN
t0 t1
Figure 4. Activation Sequence at t3
t2
t3 t4
t5 = tACT
ATR
CMDVCC
RST
CLK
I/O
VCC
t10
t12 t13 t14
t15
tDE
Figure 5. Deactivation Sequence
______________________________________________________________________________________ 11
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| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet DS8314.PDF ] | |
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