DESCRIPTION

The Teridian 73S8010R is a single smart card interface IC that provides full electrical compliance with ISO-7816-3 and EMV 4.0 (EMV2000) specifications. Interfacing with the host is done through the two-wire I2C bus and one interrupt output to inform the system controller of the card presence and faults. The card clock signal can be generated by an on-chip oscillator using an external crystal, or by connection to a clock signal. The Teridian 73S8010R incorporates an ISO-7816-3 activation/deactivation sequencer that controls the card signals. Level-shifters drive the card signals with the selected card voltage (3 V or 5 V), coming from an internal Low Drop-Out (LDO) voltage regulator. This LDO regulator is powered by a dedicated power supply input, VPC. Digital circuitry is separately powered by a digital power supply, VDD. With its embedded LDO regulator, the Teridian 73S8010R is a cost-effective solution for any application where a 5 V (typically -5% +10%) power supply is available. Hardware support for auxiliary I/O lines, C4 / C8 contacts is provided. Emergency card deactivation is initiated upon card extraction or upon any fault generated by the protection circuitry. The fault can be a card over-current, a VDD (digital power supply), a VPC (regulator power supply), a VCC (card power supply) or an over-heating fault. The card over-current circuitry is a true current detect 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.

FEATURES

• Card Interface

• Complies with ISO-7816-3 and EMV 4.0

• An LDO voltage regulator provides 3 V / 5 V to the card from an external power supply input

• 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 voltage drops on VCC card and on power supplies VDD and VPC

• Over-current detection 150 mA max

• 1 card detection input

• Auxiliary I/O lines, for C4 / C8 contact signals

• Host Interface

• Fast mode, 400 kbps I2C slave bus

• 8 possible devices in parallel

• One control register and one status register

• Interrupt output to the host for fault detection

• Crystal oscillator or host clock, up to 27 MHz

• 6 kV ESD protection on the card interface

• SO28 or QFN32 package