DS8005-RRX+

Analog Front End (AFE) Overview

The DS8005-RRX+ is a dual smart card interface analog front-end designed for mutually exclusive communication with two IC cards. It supports ISO 7816, EMV®, and B-CAS standards in a 28-pin SO package. The device operates with a digital supply voltage (VDD) ranging from 2.7V to 6.0V and requires a separate VDDA supply of at least 4.75V for card voltage generation. It provides internal power supplies of 5.0V (max 80mA), 3.0V (max 65mA), and 1.8V (max 30mA). Key electrical characteristics include ±8kV ESD protection on card interfaces, ultra-low stop-mode current (<10nA typical), and support for external crystal frequencies up to 20MHz.

Analog Front End (AFE) Feature Summary

• Dual analog front-end supporting mutually exclusive communication with two smart cards
• Internal voltage generators for 5.0V (80mA max), 3.0V (65mA max), and 1.8V (30mA max) cards
• Ultra-low stop-mode current consumption, typically less than 10nA
• ±8kV minimum ESD protection on card interfaces per HBM standard

Analog Front End (AFE) Applications

• Set-Top Box Conditional Access systems
• Telecommunications equipment
• Pay Television terminals
• Access control hardware
• Financial terminals

Analog Front End (AFE) Procurement Notes

Verify the suffix RRX+ indicates the 28-SOIC package variant. Confirm RoHS compliance status as indicated by the plus sign. Check for any specific errata associated with this revision level via manufacturer documentation before finalizing procurement specifications.

Analog Front End (AFE) Selection Notes

Select the DS8005-RRX+ when a 28-pin SO package is required for dual smart card interfacing. Ensure the host microcontroller has an ISO 7816 UART or sufficient bandwidth for bit-banging. If C4/C8 contacts are needed, consider alternative devices as this part excludes them. Verify VDDA supply requirements for proper 5V card operation.

Analog Front End (AFE) Part Context

This component belongs to the DS8005 series of smart card interfaces. It is functionally similar to two DS8024 units with external multiplexing but includes integrated low-power features and 1.8V support. The pinout is backwards compatible with the DS8313, allowing for shared PCB footprints in single or dual card reader designs.

Analog Front End (AFE) Replacement Considerations

The DS8005-RJX+ serves as a direct replacement if a 28-TSSOP package is preferred instead of the SOIC format. Both variants share identical electrical specifications and functionality within the -40°C to +85°C temperature range.