73S8009R

The 73S8009R supports 5V, 3V and 1.8V cards. Selection is done through 2 dedicated digital inputs. Level-shifters drive the card signals with the selected card voltage coming from an internal Low Drop-Out (LDO) voltage regulator. A power down digital input also allows the host microcontroller to place the IC in a very low-power mode making the 73S8009R particularly suitable for low-power and battery-powered applications. The LDO regulator is powered by a dedicated power supply input, VPC. The fault can be a card over-current, a VDD (digital power), a VPC (regulator power), a VCC (card power output) or an over-heating fault. A chip select digital input drives internal latches that allow the host controller to control multiple 73S8009R ICs in parallel. When the 73S8009R is ready to support a card with the selected voltage, a RDY signal informs the host it can initiate the card activation sequence. Digital circuitry is separately powered by a digital power supply, VDD. Emergency card deactivation is initiated upon card extraction or any fault generated by the protection circuitry. Auxiliary I/O lines are also available (SO28 package only) and make the 73S8009R suitable for all kind of cards, including synchronous (memory) cards. The 73S8009R is a very low-cost level shifter, single smart card (ICC) interface IC. The device includes a level shifter interface between a 3.3 V (typical) logic circuitry (host microcontroller) and an ISO-7816 / EMV smart card. The 73S8009R is designed to provide full electrical compliance with ISO-7816-3 EMV4.1 (EMV2000) and GSM11-11 specifications. In normal operating mode, for maximum designer flexibility, the host microcontroller is responsible for card activation and deactivation. The 73S8009R incorporates an ISO-7816-3 deactivation sequencer that controls the card signals in case of fault detection and card removal. Card presence and faults are reported to the host through an interrupt output.

The features of 73S8009R can be summarized as (1)complies with ISO-7816-3, EMV 4.0 and GSM 11-11 specifications; (2)an LDO voltage regulator provides 1.8V / 3V / 5V to the card from an external power supply input; (3)provides at least 90 mA to the card; (4)ISO-7816-3 card emergency deactivation sequencer; (5)protection includes 3 voltage supervisors that detect voltage drops on V CC (card), V DD (digital) and V PC (regulator) power supplies; (6)over-current detection, 150 mA max.; (7)2 card detection inputs, 1 for each user polarity; (8)auxiliary I/O lines for C4 / C8 contact signals; (9)card CLK clock frequency up to 20 MHz Five signal images of the card signals (RSTIN, CLKIN, IOUC, AUX1UC, AUX2UC); (10)two inputs select card voltage (CMDVCC%, CMDVCC#); (11)two Interrupt outputs (OFF, RDY) inform the system controller of card presence / faults and the interface status; (12)chip select input (CS); (13)power down input (PWRDN); (14)regulator power supply (V PC ): Class A-B-C readers: 5V, 3V and 1.8V cards: 4.75 V to 6.0 V; (15)digital interface (V DD ): 2.7 V to 3.6 V; (16)6 kV ESD protection on the card interface; (17)SO28 or QFN20 package:

The absolute maximum ratings of 73S8009R are (1)supply voltage V DD: -0.5 to 4.0 VDC; (2)supply voltage V PC: -0.5 to 6.5 VDC; (3)input voltage for digital inputs: -0.3 to (V DD +0.5) VDC; (4)storage temperature: -60 °C 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: +/- 6 kV; (8)ESD tolerance other pins: +/- 2 kV .