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參數(shù)資料
| 型號： | NCN6001DTBR2G |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 9/36頁 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE SMART CARD 20TSSOP |
| 標準包裝： | 1 |
| 應用： | 智能卡 |
| 接口： | 微控制器 |
| 電源電壓： | 2.75 V ~ 5.5 V |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 20-TSSOP |
| 包裝： | 標準包裝 |
| 安裝類型： | 表面貼裝 |
| 其它名稱： | NCN6001DTBR2GOSDKR |
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NCN6001
http://onsemi.com
17
DATA I/O LEVEL SHIFTER
The level shifter accommodates the voltage difference
that might exist between the microcontroller and the smart
card. A pulsed accelerator builtin circuit provides the fast
positive going transient according to the ISO78163
specifications. The basic I/O level shifter is depicted in
Figure 8.
LOGIC AND
LEVEL SHIFT
Q4
Q3
Q2
R2
18 k
Q5
GND
CRD_VCC
13
CRD_IO
20
CRD_VCC
CARD ENABLE
POR
SEQ 1
200 ns
Q1
R1
18 k
EN_RPU
6
I/O
1
VCC
9
VCC
PMOS
U1
VCC
Q5
GND
SYNC
MOSI/b3
MOSI/b2
From MOSI
decoding
Figure 8. Basic I/O Internal Circuit
The transaction is valid when the Chip Select pin is Low,
the I/O signal being Open Drain or Totem Pole on either
sides.
Since the device can operate either in a single or a multiple
card system, provisions have been made to avoid CRD_IO
current overload. Depending upon the selected mode of
operation (ASYNC. or Sync), the card I/O line is
respectively connected to either I/O pin 1, or to the MOSI
register byte bit 2. On the other hand, the logic level present
at the card I/O is feedback to the
mC via the MISO register
bit 3. The logic level present at pin 6 controls the connection
of the internal pullup as depicted in Table 6.
Table 6. I/O PULLUP RESISTOR TRUE TABLE
EN_RPU
I/O Pullup Resistor
Device
Operation
Low
Open, 18 kW disconnected
Parallel Mode
High
Internal 18 kW pullup active
Single Device
NOTE: 18 kW typical value
Figure 9. Typical I/O Rise and Fall Time
NOTE: Both sides of the interface run with open drain load
(worst case condition).
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| NCN6004AFTBR2 | 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
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