Datasheet

2004 July 12 3
Philips Semiconductors Product specification
IC card interface TDA8024
1 FEATURES
• IC card interface
• 3 or 5 V supply for the IC (V
DD
and GND)
• Three specifically protected half-duplex bidirectional
buffered I/O lines to card contacts C4, C7 and C8
• DC/DC converter for V
CC
generation separately
powered from a 5 V ± 20% supply (V
DDP
and PGND)
• 3or5V± 5% regulated card supply voltage (V
CC
) with
appropriate decoupling has the following capabilities:
–I
CC
< 80 mA at V
DDP
= 4 to 6.5 V
– Handles current spikes of 40 nAs up to 20 MHz
– Controls rise and fall times
– Filtered overload detection at approximately 120 mA
• Thermal and short-circuit protection on all card contacts
• Automatic activation and deactivation sequences;
initiated by software or by hardware in the event of a
short-circuit, card take-off, overheating, V
DD
or V
DDP
drop-out
• Enhanced ESD protection on card side (>6 kV)
• 26 MHz integrated crystal oscillator
• Clock generation for cards up to 20 MHz (divided by
1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals)
with synchronous frequency changes
• Non-inverted control of RST via pin RSTIN
• ISO 7816, GSM11.11 and EMV (payment systems)
compatibility
• Supply supervisor for spike-killing during power-on and
power-off and Power-on reset (threshold fixed internally
or externally by a resistor bridge); not for TDA8024AT
• Built-in debounce on card presence contacts
• One multiplexed status signal OFF.
2 APPLICATIONS
• IC card readers for banking
• Electronic payment
• Identification
• Pay TV.
3 GENERAL DESCRIPTION
The TDA8024 is a complete and cost-efficient analog
interface for asynchronous 3 or 5 V smart cards. It can be
placed between the card and the microcontroller to
perform all supply, protection and control functions. Very
few external components are required. The TDA8024AT is
a direct replacement for the TDA8004AT.
More information can be obtained from the Philips Internet
site (http://www.semiconductors.philips.com) and from
“Application note AN10141” .
4 ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
TDA8024T SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1
TDA8024AT SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1
TDA8024TT TSSOP28 plastic thin shrink small outline package; 28 leads; body width 4.4 mm SOT361-1