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參數(shù)資料
| 型號(hào)： | NCN6000DTBR2G |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 26/36頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC INTERFACE SMART CARD 20TSSOP |
| 產(chǎn)品變化通告： | Product Obsolescence 01/Jul/2009 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 應(yīng)用： | ATM 終端，氣泵，ISM |
| 接口： | 微控制器 |
| 電源電壓： | 2.7 V ~ 6 V |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-TSSOP |
| 包裝： | 剪切帶 (CT) |
| 安裝類型： | 表面貼裝 |
| 其它名稱： | NCN6000DTBR2GOSCT |
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NCN6000
http://onsemi.com
32
Printed Circuit Board Layout
Since the NCN6000 carries high speed currents together
with high frequency clock, the printed circuit board must be
carefully designed to avoid the risk of uncontrolled
operation of the interface.
A typical singlesided PCB layout is provided in
Figure 34 highlighting the ground technique.
The card socket uses a low cost ISO only version, all the
parts being located on the Component side. Connector J3
makes reference to the microcontroller used by the final
application. Of course, the connector is not necessary and
standard copper tracks might be used to connect the MPU to
the NCN6000 interface chip.
2335 mis (60 mm)
2760
mis
(70
mm)
U1
NCN6000
SMARTCARD ISO CONTACTS
MPU
V
supply
+V
bat
C4
CLK
RST
GROUND
C8
I/O
VPP
GND
Figure 34. Typical Single Sided Printed Circuit Board Layout
Application Note
A partial schematic diagram of the demo board designed
to support the NCN6000 applications is depicted in
Figure 35. This schematic diagram highlights the interface
between the microcontroller and the Smart Card, leaving
aside the peripherals used to control the MPU.
Conclusion
From a practical stand point, the CRD_VCC output
capacitor has been split into two 6.8
mF/10 V/X7R, one
being located as close as possible across pins 13 and 17 of
the NCN6000, the second one being located close by the
smart card physical connector. On the other hand, care has
been observed to minimize the cross coupling between the
clock signals (both Input and CRD_CLK) and the other
signals presents on the board.
The microcontroller holds the software necessary to
program the NCN6000, together with the code handling the
T0
operation.
Provisions
are
made
to
provide
a
communication link with an external computer by using the
RS232 standard port.
Due to the Chip Select signal, several NCN6000 can share
a common data bus as depicted in Figure 36. In this example,
two interfaces are connected to a single MPU, the CS pins
being controlled by two different signals.
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| NCN6001 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Smartcard Interface ICs |
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| 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(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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