DS8023-RJX+

Specialized Overview

The DS8023-RJX+ is a smart card interface IC designed for ISO 7816, EMV, and GSM11-11 applications. It supports 5V, 3V, and 1.8V cards with an internal charge pump generating VCC up to 80mA at 5V, 65mA at 3V, or 30mA at 1.8V. Operating from a 2.7V to 6.0V digital supply (VDD) and a minimum 3.0V analog supply (VDDA), it features ultra-low stop-mode current of less than 10nA. The device includes ±8kV ESD protection, automatic activation/deactivation sequencing, and flexible clock generation via external crystal inputs up to 20MHz.

Specialized Feature Summary

• Provides analog front-end level shifting and power generation for 1.8V, 3V, and 5V smart cards
• Features ultra-low stop-mode current consumption below 10nA for extended battery life
• Includes integrated charge pump and voltage supervisor for automatic card activation and deactivation
• Offers high-current and short-circuit protection with ±8kV IEC ESD protection on card interface pins

Specialized Applications

• Set-Top Box Conditional Access systems
• Banking and POS Terminals including Debit/Credit Payment Terminals
• Automated Teller Machines (ATMs)
• Access Control and PIN Pads

Specialized Procurement Notes

Verify the component matches the specific -RJX+ suffix indicating a lead-free/RoHS-compliant package in the 28-pin TSSOP format. Confirm the temperature range is rated for -40°C to +85°C. Check for any manufacturer errata that may apply to specific revisions of this device before finalizing procurement specifications.

Specialized Selection Notes

Select the DS8023-RJX+ when a low-cost, low-power analog front-end is required for smart card readers supporting multiple voltage standards. Ensure the host system can provide separate VDD and VDDA supplies or utilize the internal charge pump capabilities. Verify that the application requires the specific 28-pin TSSOP footprint and industrial temperature range provided by this variant.

Specialized Part Context

This component belongs to the Maxim Integrated/Analog Devices smart card interface family. It serves as a direct replacement for the NXP TDA8024 in many existing designs with minimal hardware changes. The device integrates functions typically handled by discrete components, simplifying the design of secure payment and identification terminals.

Specialized Replacement Considerations

The datasheet explicitly states the DS8023 can often be used as a replacement for the TDA8024 with little or no application changes. Designers should verify software support for the ultra-low-power stop mode if upgrading from legacy devices.