DS8313-RJX+

Specialized Overview

The DS8313-RJX+ is a smart card and SIM interface IC designed as a low-cost analog front-end for readers excluding auxiliary contacts C4 and C8. It supports 5V, 3V, and 1.8V cards with internal voltage generation providing up to 80mA at 5V, 65mA at 3V, and 30mA at 1.8V. The device operates on a digital supply (VDD) of 2.7V to 6.0V and an analog supply (VDDA) of 4.75V to 6.0V. It features ultra-low stop-mode current (<10nA), ±8kV HBM ESD protection, and flexible clock division from an external crystal up to 20MHz.

Specialized Feature Summary

• Internal sequencer manages automatic card activation and deactivation sequences.
• Integrated level shifting translates host I/O lines for direct smart card communication.
• High-current protection includes short-circuit detection and high-temperature shutdown.

Specialized Applications

• Pay/Premium Television systems
• Access Control terminals
• Banking and POS Terminals
• Automated Teller Machines

Specialized Procurement Notes

Verify the specific suffix RJX+ against official documentation to confirm package type and temperature range. Ensure the ordering code matches the required lead-free/RoHS compliance status. Confirm availability directly with the manufacturer or authorized distributors as future product variants may have different supply constraints.

Specialized Selection Notes

Select the DS8313 over the DS8314 when higher current capacity for 5V cards is required, as the DS8314 uses a single power supply with reduced delivery capability. Consider the DS8313L variant if negative polarity presence detection is needed instead of the default positive polarity. Ensure the application does not require communication via auxiliary contacts C4 and C8.

Specialized Part Context

This component belongs to the Maxim Integrated DS8313/DS8314 family of smart card interfaces. It serves as an analog front-end bridging microcontrollers and ISO 7816 compliant smart cards. The device simplifies design by integrating power regulation, level shifting, and protection circuits typically found in discrete implementations.

Specialized Replacement Considerations

The DS8314 is a functional alternative requiring only one analog supply but offers reduced 5V current capacity. The DS8313L provides negative polarity presence detection. Existing TDA8024 applications may utilize these devices with minimal hardware changes.