DS8005

The DS8005 is provided in a 28-pin SO package. The pinout is backwards compatible with the DS8313, allowing applications to use the same footprint and PCB for applications that communicate with either one or two smart cards. The analog interface is designed for use in ISO 7816, EMV, and B-CAS applications. The device is functionally similar to two DS8024s with external multiplexing to select the active interface, but also includes low power and 1.8V card support. Additionally, the device is designed for applications where the C4/C8 (AUX1/AUX2) contacts are not required on either card interface. And it is designed to be used with microcontrollers that contain an ISO 7816 UART, or have the bandwidth to run this protocol in software by bit-banging IO ports. If the microcontroller does not have the capability of running the ISO 7816 UART, the DS8007 is the more appropriate product selection. The DS8005 dual smart card interface is a low-cost, dual analog front-end for an IC card reader interface that needs to communicate with two smart cards in a mutually exclusive fashion.

The features of DS8005 can be summarized as (1)analog interface and level shifting for IC card communication; (2)±8kV (min) ESD (HBM) protection on card interfaces; (3)ultra-low stop-mode current, less than 10nA typical; (4)internal IC card supply-voltage generation 5.0V ±5%, 80mA (max), 3.0V ±8%, 65mA (max), 1.8V ±10%, 30mA (max); (5)automatic card activation and deactivation controlled by dedicated internal sequencer; (6)I/O lines from host directly level shifted for smart card communication; (7)flexible card clock generation, supporting external crystal frequency divided by 1, 2, 4, or 8; (8)high-current, short-circuit and high-temperature protection; (9)low active-mode current; (10)internal multiplexing allows one ISO 7816 UART implementation to control two smart card sockets.

The absolute maximum ratings of DS8005 are (1)voltage range on VDD relative to GND: -0.5V to +6.5V; (2)voltage range on VDDA Relative to GND: -0.5V to +6.5V; (3)voltage range on CLKA, RSTA, I/OA : -0.5V to (VCCA + 0.5V); (4)Voltage Range on CLKB, RSTB, I/OB: -0.5V to (VCCB + 0.5V); (5)voltage range on all other pins relative to GND: -0.5V to (VDD + 0.5V); (6)maximum junction temperature: +125°C; (7)maximum power dissipation range (TA = -25°C to +85°C): 700mW; (8)storage temperature range: -55°C to +150°C; (9)lead temperature (soldering, 10s): +300°C; (10)soldering temperature (reflow): +260°C.