TDA8034HN/C1,118 NXP Semiconductors, TDA8034HN/C1,118 Datasheet - Page 12
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TDA8034HN/C1,118
Manufacturer Part Number
TDA8034HN/C1,118
Description
IC SMARD CARD INTERFACE 24HVQFN
Manufacturer
NXP Semiconductors
Datasheet
1.TDA8034HNC1118.pdf
(30 pages)
Specifications of TDA8034HN/C1,118
Controller Type
Smart Card Interface
Interface
Analog
Voltage - Supply
1.8V, 3V, 5V
Current - Supply
65mA
Operating Temperature
-25°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
NXP Semiconductors
TDA8034HN
Product data sheet
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
(t
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.
deb
Fig 9.
•
OFFN
PRESN
RST
CLK
I/O
V
XTAL1
OSCINT
In card sessions, pin CMDVCCN is LOW: when pin OFFN goes LOW, the fault
detection circuit triggers the automatic emergency deactivation sequence (see
Figure
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.
CC
= 640 × (
Emergency deactivation sequence after card removal
9). When the microcontroller resets pin CMDVCCN to HIGH, after the
1
∨
All information provided in this document is subject to legal disclaimers.
fosc(int)low
t10
Rev. 3.0. — 17 January 2011
).
high frequency
Figure 10 on page 13
t12
t
deact
t13
t14
shows the operation of the debouncing
TDA8034HN
low frequency
Smart card interface
© NXP B.V. 2011. All rights reserved.
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