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TDA8020

更新时间： 2024-01-26 03:52:34
品牌 Logo 应用领域
恩智浦 - NXP /
页数 文件大小 规格书
24页 115K
描述
Dual smart card interface

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TDA8020 技术参数

是否Rohs认证： 符合生命周期：Transferred
Reach Compliance Code：unknown风险等级：5.58
Is Samacsys：NJESD-30 代码：S-PQFP-G32
JESD-609代码：e3端子数量：32
最高工作温度：85 °C最低工作温度：-25 °C
封装主体材料：PLASTIC/EPOXY封装代码：QFP
封装等效代码：QFP32,.35SQ,32封装形状：SQUARE
封装形式：FLATPACK电源：1.5,3.3 V
认证状态：Not Qualified子类别：Other Microprocessor ICs
表面贴装：YES温度等级：OTHER
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.8 mm端子位置：QUAD
uPs/uCs/外围集成电路类型：MICROPROCESSOR CIRCUITBase Number Matches：1

TDA8020 数据手册

 浏览型号TDA8020的Datasheet PDF文件第4页浏览型号TDA8020的Datasheet PDF文件第5页浏览型号TDA8020的Datasheet PDF文件第6页浏览型号TDA8020的Datasheet PDF文件第8页浏览型号TDA8020的Datasheet PDF文件第9页浏览型号TDA8020的Datasheet PDF文件第10页 
Philips Semiconductors  
Product specification  
Dual smart card interface  
TDA8020HL  
FUNCTIONAL DESCRIPTION  
A specific reference supply voltage, VDDI, is used for the  
interface signals CLKIN1, CLKIN2, I/O1uC, I/O2uC,  
SAD0, SAD1, SCL, SDA and IRQ, which can be lower  
than VDD (minimum 1.5 V), thus allowing direct control with  
a low voltage supplied device.  
Throughout this specification, it is assumed that the reader  
is familiar with ISO 7816 norm terminology.  
Supply  
Pins SCL, SDA and IRQ are open-drain outputs, and may  
The TDA8020HL operates with a supply voltage from  
2.5 to 6.5 V. An integrated voltage supervisor ensures that  
no spike appears on cards contacts during power-on or off.  
The supervisor also initializes the device, and forces an  
automatic emergency deactivation of the contacts in the  
event of a supply drop-out.  
be externally pulled up to a voltage higher than VDD  
.
I2C-bus  
A 400 kHz I2C-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 SAD0 and SAD1  
(see Table 1).  
As long as the supply voltage is below the threshold  
voltage Vth1, the capacitor CDEL remains uncharged. When  
the supply voltage reaches Vth1 and Vhys1, then CDEL is  
charged with a small current source of approximately 2 µA.  
When the voltage on CDEL reaches Vth2, 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supervisor is no longer active.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).  
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  
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.  
V
DD  
V
+ V  
hys1  
th1  
V
th1  
V
th2  
V
CDEL  
t
t
w
w
IRQ  
status read  
after event  
BUS NOT RESPONDING  
BUS OK  
BUS NOT  
BUS OK  
BUS NOT  
RESPONDING  
RESPONDING  
FCE835  
Fig.3 Supply supervisor.  
7
2001 Aug 15  
1...45678910...24

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