參數(shù)資料
型號： TDA8034HN/C1
廠商： NXP SEMICONDUCTORS
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQCC24
封裝： 4 X 4 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT616-1, HVQFN-24
文件頁數(shù)： 4/30頁
文件大?。?/td> 265K
代理商： TDA8034HN/C1
TDA8034HN
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3.1. — 5 September 2011
12 of 30
NXP Semiconductors
TDA8034HN
Smart card interface
In card sessions, pin CMDVCCN is LOW: when pin OFFN goes LOW, the fault
detection circuit triggers the automatic emergency deactivation sequence (see
Figure 9). When the microcontroller resets pin CMDVCCN to HIGH, after the
deactivation sequence, pin OFFN is rechecked. If the card is still present, pin OFFN
returns to HIGH. This check identifies the fault as either a hardware problem or a card
removal incident.
On card insertion or removal, bouncing can occur in the PRESN signal. This depends on
the type of card presence switch in the connector (normally open or normally closed) and
the mechanical characteristics of the switch. To correct for this, a debouncing feature is
integrated in to the TDA8034HN. This feature operates at a typical duration of 8 ms
(tdeb =640 (1fosc(int)low). Figure 10 on page 13 shows the operation of the debouncing
feature.
On card insertion, pin OFFN goes HIGH after the debounce time has elapsed. When the
card is extracted, the automatic card deactivation sequence is performed on the first
HIGH/LOW transition on pin PRESN. After this, pin OFFN goes LOW.
Fig 9.
Emergency deactivation sequence after card removal
001aal141
OFFN
PRESN
CLK
I/O
VCC
XTAL1
OSCINT
t10
t12
tdeact
t13
t14
RST
low frequency
high frequency
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA8034T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart card interface
TDA8034T/C1,112 功能描述:接口 - 專用 SMART CARD INTERFACE RoHS:否 制造商:Texas Instruments 產(chǎn)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
TDA8034T/C1,118 功能描述:接口 - 專用 SMART CARD INTERFACE RoHS:否 制造商:Texas Instruments 產(chǎn)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
TDA8035C1 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart card interface externally by a resistor bridge
TDA8035HN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart card interface externally by a resistor bridge
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