Smart card interface chips

TDK Semiconductor has debuted three new smart card interface circuits for battery powered and power sensitive applications, such as portable Point-of-Sales terminals, PIN-pad readers, and payphones.

TDK Semiconductor has debuted three new smart card interface circuits: the 73S8023C, 73S8024C and the 73S8010C.

The new chips possess high efficiency (85%) and a small size step-up/step-down converter that supplies up to 100mA to the card. Additionally, a power down mode is implemented that allows a host to place the smart card interface function in a mode that will only draw a couple of micro-Amps.

The 73S80xxC devices all comply with ISO-7816-3 and EMV4.1 standards. The differences between the three circuits reside in the host interface.

The 73S8010C is controllable through I2C, whereas 73S8024C and 73S8023C devices exhibit parallel I/Os compatible with the industry standards TDA8004 and TDA8002. Control of multiple smart card interfaces in parallel through the same host control bus is possible without additional external circuitry with the 73S8010C and 73S8023C.

The 73S8024C is firmware compatible with current industry-standard devices. Consumer applications such as Set-Top-Boxes, DVD / HDD recorders, LCD TVs, and such can take advantage of the low-voltage operating mode of the 73S8024C to remove the 5V system power supply from their conditional access functions, lowering the overall bill-of-material costs.

Samples of TDK 73S8024C, 73S8023C and 73S8010C are available now. These ICs are available in SO28 and in QNF32 packages. Like all other TDK Semiconductor products, the new circuits are also available in lead-free and green material.

The new TDK circuits are suited for battery powered and power sensitive applications, such as portable Point-of-Sales terminals, PIN-pad readers, and payphones, as well as any portable smart card based payment or indentation devices, such as cell phones and Personal Digital Assistants (PDAs).

Production volumes will be available in Q1 2005. Pricing starts at $2.00 each in 1k quantities. Demo boards are available now.

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