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參數(shù)資料
| 型號： | TDA8020HL/C1 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP32 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-358-1, LQFP-32 |
| 文件頁數(shù)： | 26/28頁 |
| 文件大?。?/td> | 137K |
| 代理商： | TDA8020HL/C1 |
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2003 Nov 06
7
Philips Semiconductors
Product specication
Dual IC card interface
TDA8020HL
FUNCTIONAL DESCRIPTION
Throughout this specification, it is assumed that the reader
is familiar with ISO 7816 terminology.
Supply
The TDA8020HL operates with a supply voltage from
2.7 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.
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
A.
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supervisor is no longer active.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 voltage supervisor
becomes inactive (see Fig.3).
Separate supply pins are used for the DC-to-DC converter,
allowing specific decoupling for counteracting the noise
the switching transistors may induce on the supply.
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.
Pins SCL, SDA and IRQ are open-drain outputs, and may
be externally pulled up to a voltage higher than VDD.
handbook, full pagewidth
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 Voltage supervisor.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8023 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power IC card interface |
| TDA8023TT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power IC card interface |
| TDA8023TT/C1 | 制造商:NXP Semiconductors 功能描述:Cut Tape |
| TDA8023TT/C1,118 | 功能描述:輸入/輸出控制器接口集成電路 SMART CARD READER 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 |
| TDA8023TT/C1118 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
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