AT83C24NDS-TISUL

Specialized Overview

The AT83C24NDS-TISUL is a smart card reader interface IC designed for EFT/POS terminals and set-top boxes. It supports ISO 7816, EMV2000, and GSM standards with programmable voltage outputs of 5V ±5% at 65 mA (Class A) or 3V ±0.2V at 65 mA (Class B). The device features an integrated high-efficiency step-up DC/DC converter operating between 3V and 5.5V input supply. Communication is managed via a Two-Wire Interface (TWI) allowing up to eight devices on one bus. It includes an 8kV+ ESD protection system, automatic activation sequences, and power monitoring circuits.

Specialized Feature Summary

• Compliance with major smart card standards including ISO 7816 and EMV2000
• Integrated high-efficiency DC/DC step-up converter for low-power operation
• Programmable TWI address supporting multi-device bus configurations
• Automatic deactivation sequence triggered by error conditions or power failure

Specialized Applications

• EFT/POS terminals
• Set-top boxes with NDS Video-Guard conditional access software
• Smart card reader/writer applications

Specialized Procurement Notes

Verify the specific suffix 'TISUL' against official Microchip documentation to confirm package type and tape-and-reel specifications. Ensure the component matches the NDS-approved variant requirements, specifically regarding the mandatory 3.3µF capacitor on the CVCC pin and the 18MHz minimum clock frequency constraint.

Specialized Selection Notes

Select this model for applications requiring NDS Video-Guard compatibility. Note that the NDS version mandates a minimum 18MHz clock input, unlike the standard AT83C24B which supports lower frequencies. Verify that the host system can provide the required 18MHz clock signal and that the CVCC decoupling capacitor does not exceed 3.3µF.

Specialized Part Context

The AT83C24NDS is a dedicated version of the AT83C24B approved by NDS for use with Video-Guard conditional access software in set-top boxes. Key differences include stricter Class A voltage tolerances (4.75V to 5.25V), a mandatory 18MHz minimum input clock, and a maximum CVCC capacitor limit of 3.3µF compared to 10µF for the standard B variant.

Specialized Replacement Considerations

The AT83C24B is the base family member but lacks NDS approval. Direct replacement requires verifying if the NDS-specific constraints (18MHz clock, 3.3µF max CVCC cap) are acceptable for the target application.