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參數(shù)資料
| 型號： | NCN6001 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Compact Smart Card Interface IC |
| 中文描述： | 緊湊型智能卡接口IC |
| 文件頁數(shù)： | 18/36頁 |
| 文件大?。?/td> | 332K |
| 代理商： | NCN6001 |
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NCN6001
http://onsemi.com
18
GENERAL PURPOSE CRD_C4 AND CRD_C8
These two pins can be used as a logic input to define the
address of a given interface (in the range $00 to $11), or as
a standard C4/C8 access to the smart card’s channels. Since
these pins can be directly connected to the V
CC
power
supply, both output stages are built with switched
NMOS/PMOS totem pole as depicted in Figure 9.
Figure 9. Typical CRD_C4 Output Drive and Logic Control
Q1
U3
U4
GND
500 R
R1
CRD_VCC
C4
Q2
U1
LEVEL
SHIFTER
V
CC
WRT_C4
GND
Q3
ESD
SWITCHED
BIAS
U6
U9
I = 1 A
CONTROL
ADDRESS
READ_C4
U5
U8
U7
V
max
3
3
3
2
1
2
1
2
1
U2
V
CC
CRD_VCC
The C4 and C8 pins are biased by an internal current
source to provide a logic one when the pin is left open. In this
case, care must be observed to avoid relative low impedance
to ground to make sure the pin is at a High logic level.
However, it is possible to connect the pin to V
CC
(battery
supply) to force the logic input to a High level, regardless of
the input bias. Thanks to the CONTROL internal signal, the
system automatically adapts the mode of operation (chip
address or data communication) and, except the leakage, no
extra current is drawn from the battery to bias these pins
when the logic level is High.
When any of these pins is connected to GND, a continuous
1 A typical sink current will be absorbed from the battery
supply.
The switched Totem Pole structure provides the fast
positive going transient when the related pin is forced to the
High state during a data transfer. In the event of a low
impedance connected across C4 or C8 to ground, the current
flow is limited to 15 mA, according to the ISO7816-3
specification.
The two general purpose pins can transfer data from the
external microcontroller to the card and read back the logic
state, but none of these pins can read the data coming from
the external smart card. On the other hand, both C4 and C8
can read input logic, hence the physical address of a given
chip.
In order to sustain the 8 kV ESD specified for these pins,
an extra protection structure Q3 has been implemented to
protect the MOS gates of the input circuit.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCN6001/D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Compact Smart Card Interface IC |
| NCN6001_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Compact Smart Card Interface IC |
| NCN6001_0610 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Smartcard Interface ICs |
| NCN6001DTBEVB | 功能描述:界面開發(fā)工具 NCN6001 TSSOP EVAL BOARD RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| NCN6001DTBR2 | 功能描述:輸入/輸出控制器接口集成電路 2.7V POS/ATM Smart RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
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