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參數資料
| 型號： | TDA8020 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Dual smart card interface |
| 中文描述： | 雙界面智能卡 |
| 文件頁數： | 7/24頁 |
| 文件大小： | 114K |
| 代理商： | TDA8020 |
2001 Aug 15
7
Philips Semiconductors
Product specification
Dual smart card interface
TDA8020HL
FUNCTIONAL DESCRIPTION
Throughout this specification, it is assumed that the reader
is familiar with ISO 7816 norm terminology.
Supply
The TDA8020HL operates with a supply voltage from
2.5 to 6.5 V. An integrated voltage supervisor ensures that
nospikeappearsoncardscontactsduringpower-onoroff.
The supervisor also initializes the device, and forces an
automatic emergency deactivation of the contacts in the
event of a supply drop-out.
As long as the supply voltage is below the threshold
voltageV
th1
,thecapacitorC
DEL
remainsuncharged.When
the supply voltage reaches V
th1
and V
hys1
, then C
DEL
is
chargedwithasmallcurrentsourceofapproximately2
μ
A.
When the voltage on C
DEL
reaches V
th2
, then the
supervisor is no longer active. As long as the supervisor is
active (pin IRQ is LOW), bit SUPL in the status register is
set. When pin IRQ goes HIGH the supervisor becomes
inactive (see Fig.3).
Separate supply pins are used for the DC/DC converter,
allowing specific decoupling for counteracting the noise
the switching transistors may induce on the supply.
A specific reference supply voltage, V
DDI
, is used for the
interface signals CLKIN1, CLKIN2, I/O1uC, I/O2uC,
SAD0, SAD1, SCL, SDA and IRQ, which can be lower
thanV
DD
(minimum 1.5 V),thusallowingdirectcontrolwith
a low voltage supplied device.
Pins SCL, SDA and IRQ are open-drain outputs, and may
be externally pulled up to a voltage higher than V
DD
.
I
2
C-bus
A 400 kHz I
2
C-bus slave interface is used for configuring
the device and reading the status. The bus has
2 addresses, one for each card. 4 devices may be used in
parallel due to the address selection pins SAD0and SAD1
(see Table 1).
Table 1
Proposed addresses
PIN SAD1
PIN SAD0
CARD 1
CARD 2
LOW
LOW
HIGH
HIGH
LOW
HIGH
LOW
HIGH
40H
42H
44H
46H
48H
4AH
4CH
4EH
handbook, full pagewidth
tw
tw
FCE835
BUS OK
BUS NOT
RESPONDING
BUS NOT
RESPONDING
BUS NOT RESPONDING
BUS OK
status read
after event
VDD
Vth1
+
Vhys1
Vth1
Vth2
VCDEL
IRQ
Fig.3 Supply supervisor.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA8020HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual smart card interface |
| TDA8020HL/C1,118 | 功能描述:輸入/輸出控制器接口集成電路 SMART CARD INTERFACE RoHS:否 制造商:Silicon Labs 產品: 輸入/輸出端數量: 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 |
| TDA8020HL/C2 | 制造商:NXP Semiconductors 功能描述:Cut Tape |
| TDA8020HL/C2,118 | 功能描述:輸入/輸出控制器接口集成電路 SMART CARD INTERFACE DUAL RoHS:否 制造商:Silicon Labs 產品: 輸入/輸出端數量: 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 |
| TDA8020HL/C2,151 | 功能描述:接口 - 專用 Dual IC card interface RoHS:否 制造商:Texas Instruments 產品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
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