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TDA8004T データシート(PDF) 6 Page - NXP Semiconductors

部品番号 TDA8004T
部品情報  IC card interface
Download  24 Pages
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8004T データシート(HTML) 6 Page - NXP Semiconductors

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1999 Dec 30
6
Philips Semiconductors
Product specification
IC card interface
TDA8004T
FUNCTIONAL DESCRIPTION
Throughout this document, it is assumed that the reader is
familiar with ISO 7816 norm terminology.
Power supply
The supply pins for the IC are VDD and GND. VDD should
be in the range from 2.7 to 6.5 V. All interface signals with
the system controller are referenced to VDD; so, be sure
the supply voltage of the system controller is also VDD. All
card contacts remain inactive during powering up or
powering down. The sequencer is not activated until VDD
reaches Vth2 +Vhys(th2) (see Fig.3). When VDD falls below
Vth2, an automatic deactivation of the contacts is
performed.
For generating a 5 V
±5% VCC supply to the card, an
integrated voltage doubler is incorporated. This step-up
converter should be separately supplied by VDDP and
PGND (from 4.5 to 6.5 V). Due to large transient currents,
the 2
× 100 nF capacitors of the step-up converter should
have an ESR less than 100 m
Ω and be located as near as
possible to the IC.
The supply voltages VDD and VDDP may be applied to
the IC in any time sequence.
If a voltage between 7 and 9 V is available within the
application, this voltage may be tied to pin VUP, thus
blocking the step-up converter. In this case, VDDP must be
tied to VDD and the capacitor between pins S1 and S2 may
be omitted.
Voltage supervisor
This block surveys the VDD supply. A defined reset pulse
of approximately 10 ms (tW) is used internally for
maintaining the IC in the inactive mode during powering up
or powering down of VDD (see Fig.3).
As long as VDD is less than Vth2 +Vhys(th2), the IC will
remain inactive whatever the levels on the command lines.
This also lasts for the duration of tW after VDD has reached
a level higher than Vth2 +Vhys(th2).
The system controller should not try to start an activation
during this time.
When VDD falls below Vth2, a deactivation sequence of the
contacts is performed.
handbook, halfpage
CLKDIV1
CLKDIV2
RFU1
PGND
S2
VDDP
S1
VUP
PRES
PRES
I/O
AUX2
AUX1
CGND
AUX2UC
AUX1UC
I/OUC
XTAL2
OFF
GND
XTAL1
VDD
RSTIN
CMDVCC
n.c.
VCC
RST
CLK
1
2
3
4
5
6
7
8
9
10
11
12
13
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
TDA8004T
MGM174
Fig.2 Pin configuration.


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