73S8024RN

The Teridian 73S8024RN is a single smart card (ICC) interface IC that can be controlled by a dedicated control bus and it has been designed to provide full electrical compliance with ISO-7816-3, EMV 4.0 (EMV2000) and NDS specifications. This LDO regulator is powered by a dedicated power supply input V PC: Digital circuitry is separately powered by a digital power supply VDD: With its embedded LDO regulator, the 73S8024RN is a cost effective solution for any application where a 5V (typically -5% +10%) power supply is available. Hardware support for auxiliary I/O lines, C4 / C8 contacts, is provided*. The fault can be a card over-current, a VDD (digital power supply)**, a VPC (regulator power supply), a V CC (card power supply) or an over-heating fault. The card over-current circuitry is a true current detection function, as opposed to VCC voltage drop detection, as usually implemented in ICC interface ICs. The VDD voltage fault has a threshold voltage that can be adjusted with an external resistor or resistor network. It allows automated card deactivation at a customized VDD voltage threshold value. It can be used, for instance, to match the system controller operating voltage range. Interfacing with the system controller is done through a control bus, composed of digital inputs to control the interface, and one interrupt output to inform the system controller of the card presence and faults. The card clock can be generated by an on-chip oscillator using an external crystal or by connection to a clock signal. The 73S8024RN incorporates an ISO-7816-3 activation/deactivation sequencer that controls the card signals. Level-shifters drive the card signals with the selected card voltage (3V or 5V), coming from an internal Low Drop-Out (LDO) voltage regulator. Emergency card deactivation is initiated upon card extraction or upon any fault generated by the protection circuitry.

The features of 73S8024RN can be summarized as (1)complies with ISO-7816-3, EMV 4.0 and NDS; (2)A LDO voltage regulator provides 3V / 5V to the card from an external power supply input; (3)provides at least 90mA to the card; (4)ISO-7816-3 Activation / Deactivation sequencer with emergency automated deactivation on card removal or fault detected by the protection circuitry Protection includes 3 voltage supervisors that detect; (5)voltage drops on V CC (card), V DD (digital)**, and V PC (regulator) power supplies; (6)the V DD voltage supervisor threshold value can be externally adjusted**; (7)over-current detection 150mA max; (8)card clock stop high or low*; (9)2 card detection inputs, 1 for each possible user polarity; (10)auxiliary I/O lines, for C4 / C8 contact signals*; (11)card CLK clock frequency up to 20MHz; (12)3 digital inputs control the card activation / deactivation, card reset and card voltage; (13)4 digital inputs control the card clock (division rate and card clock stop modes); (14)1 digital output, interrupt to the system controller, allows the system controller to monitor the card presence and faults.; (15)crystal oscillator or host clock, up to 27MHz; (16)regulator Power Supply:; (17)4.75V to 5.5V (EMV 4.0); (18)4.85V to 5.5V (NDS); (19)digital interfacing: 2.7V to 5.5V; (20)6kV ESD Protection on the card interface; (21)package: SO28, 20QFN or 32QFN:

The absolute maximum ratings of 73S8024RN are (1)supply voltage V DD: -0.5 to 6.0 VDC; (2)supply voltage V PC: -0.5 to 6.0 VDC; (3)input voltage for digital inputs: -0.3 to (V DD +0.5) VDC; (4)storage temperature: -60 to 150°C; (5)pin voltage (except card interface): -0.3 to (V DD +0.5) VDC; (6)pin voltage (card interface): -0.3 to (V CC + 0.5) VDC; (7)ESD tolerance card interface pins: +/- 6kV; (8)ESD tolerance other pins: +/- 2kV .