參數(shù)資料
型號(hào)： TDA8030
廠商： NXP Semiconductors N.V.
英文描述： USB smart card reader (OTP or ROM)
中文描述： USB智能卡閱讀器（OTP或光盤(pán)）
文件頁(yè)數(shù)： 30/57頁(yè)
文件大?。?/td> 228K
代理商： TDA8030
2003 Jul 04
30
Philips Semiconductors
Product specification
USB smart card reader (OTP or ROM)
TDA8030; TDA8031
8.2.4
S
UPPLY SUPERVISOR
The switched supply voltage (V
DD
) is surveyed by a
voltage supervisor, to ensure proper Power-on reset when
the reader is plugged into the USB-bus, to maintain all
cards contacts inactive during power-on and also to
enforce an emergency deactivation sequence in case of
V
DD
drop-out or when the reader is unplugged from the
USB-bus.
The voltage supervisor generates an alarm pulse, whose
length is defined by an external capacitor tied to the
CDELAY pin, when V
DD
is too low to ensure proper
operation (1 ms per 2 nF typical).
This pulse is used as a Power-on reset pulse and also to
either block any spurious spikes on card contacts during
microcontrollers reset, or to force an automatic
deactivation of the contacts in the event of supply
drop-out; see Sections 8.3.3 and 8.3.4.
After power-on, or after a voltage drop, bit SUPL is set
within the Hardware Status Register (HSR) and remains
set until HSR is readout outside the alarm pulse. As long
as the Power-on reset is active, INT0 is LOW.
The same events occurs when the RESET pin has been
set active; the RESET pin should be set HIGH for a
minimum of 100
μ
s for a proper reset.
handbook, full pagewidth
CDELAY
Vth2
VDD
Vth1
tw
tw
tw
SUPL
INT0
status read
power-on
supply dropout
reset by pin RESET
power- off
RESET
MGU888
Fig.8 Voltage supervisor.
相關(guān)PDF資料
PDF描述
TDA8030HL USB smart card reader (OTP or ROM)
TDA8031 USB smart card reader (OTP or ROM)
TDA8031HL USB smart card reader (OTP or ROM)
TDA8302 SMALL SIGNAL COMBINATION IC FOR COLOUR TV
TDA8931 Power comparator 1 X 20 W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA8030HL 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:USB smart card reader (OTP or ROM)
TDA8031 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:USB smart card reader (OTP or ROM)
TDA8031HL 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:USB smart card reader (OTP or ROM)
TDA8034AT 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Smart card interface
TDA8034AT/C1 制造商:NXP Semiconductors 功能描述:Cut Tape
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*