TDA8034T Datasheet, PDF (1/29 Pages) NXP Semiconductors – Smart card interface

TDA8034T; TDA8034AT
Smart card interface
Rev. 2.0 — 12 November 2010
Product data sheet
1. General description
The TDA8034T/TDA8034AT is a cost-effective analog interface for asynchronous and
synchronous smart cards operating at 5 V or 3 V. Using few external components, the
TDA8034T/TDA8034AT provides all supply, protection and control functions between a
smart card and the microcontroller.
2. Features and benefits
„ Integrated circuit smart card interface in an SO16 package
„ 5 V or 3 V smart card supply
„ One protected half-duplex bidirectional buffered I/O line (C7)
„ V_CC regulation:
‹ 5 V ± 5 % or 3 V ± 5 % using two low ESR multilayer ceramic capacitors: one of
220 nF and one of 470 nF
‹ current spikes of 40 nA/s (V_CC = 5 V and 3 V) or 15 nA/s (V_CC =1.8 V) up to
20 MHz, with controlled rise and fall times and filtered overload detection of
approximately 120 mA
„ Thermal and short-circuit protection for all card contacts
„ Automatic activation and deactivation sequences triggered by a short-circuit, card
take-off, overheating, falling V_DD, V_DD(INTF) or V_DDP
„ Enhanced card-side ElectroStatic Discharge (ESD) protection of > 6 kV
„ External clock input up to 26 MHz connected to pin XTAL1
„ Card clock generation up to 20 MHz using pin CLKDIV1 with synchronous frequency
changes of:
‹ ¹âˆ¨₂ f_xtal or ¹âˆ¨₄ f_xtal on TDA8034T
‹ f_xtal or ¹âˆ¨₂ f_xtal on TDA8034AT
„ Non-inverted control of pin RST using pin RSTIN
„ Compatible with ISO 7816, NDS and EMV 4.2 payment systems
„ Supply supervisor for killing spikes during power on and off:
‹ using a fixed threshold
‹ using an external resistor bridge with threshold adjustment
„ Built-in debouncing on card presence contacts (typically 4.5 ms)
„ Multiplexed status signal using pin OFFN
3. Applications
„ Pay TV
„ Electronic payment