AT83C26-PLTUL

Specialized Overview

The AT83C26-PLTUL is a smart card reader interface IC manufactured by Microchip Technology, designed for applications such as EFT/POS terminals and set-top boxes. It supports up to five smart card interfaces compliant with ISO 7816, EMV2000, GIE-CB, and GSM standards. The device operates within an extended voltage range of 3V to 5.5V and features two integrated DC/DC converters for power management. Key electrical parameters include a maximum operating current of 5mA without smart cards, a typical power-down current of 30µA, and a maximum in-rush current of 150mA per DC/DC converter. It accommodates clock inputs from 4MHz to 48MHz and functions reliably in industrial temperatures ranging from -40°C to +85°C.

Specialized Feature Summary

• Supports up to five smart card interfaces with programmable voltage levels (Class A: 5V, Class B: 3V, Class C: 1.8V) and low ripple noise.
• Features versatile host connectivity via a Two-Wire Interface (TWI) link supporting speeds up to 400kbit/s with programmable addressing.
• Includes high-efficiency DC/DC converters with automatic deactivation sequences upon error conditions like over-current or power failure.
• Provides robust protection mechanisms including logic level shifters, short circuit current limitation, and 4kV+ ESD protection.

Specialized Applications

• EFT/POS terminals
• Set-top boxes
• Smart card reader/writer applications

Specialized Procurement Notes

Verify the specific package variant against the ordering suffix. The PLTUL designation indicates a QFN48 package. Confirm that the procurement source provides official datasheets matching the AT83C26 specifications. Ensure compatibility with TWI bus requirements and external component values for DC/DC converters during integration.

Specialized Selection Notes

Select this component when managing multiple smart cards requiring independent voltage regulation and protocol compliance. Consider the shared I/O constraints between SC2 and SC3 interfaces; choose full SC2 configuration if CC4/CC8 contacts are needed, otherwise utilize SC3. Evaluate power consumption requirements, noting the low quiescent current suitable for portable devices.

Specialized Part Context

The AT83C26 belongs to Microchip's family of smart card reader interface controllers. It integrates power management and communication protocols to simplify system design. The device reduces bill of materials by combining multiple smart card readers and DC/DC converters into a single IC, enabling compact designs for embedded systems.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence regarding TWI addressability, DC/DC converter capabilities, and pinout compatibility before considering alternative components.

Specialized FAQ

How many smart card interfaces can the AT83C26 support simultaneously?

The AT83C26 supports up to five smart card interfaces. However, due to shared I/Os between SC2 and SC3, users must configure either a full SC2 interface or an SC3 interface, but not both simultaneously.

What is the maximum speed of the Two-Wire Interface (TWI)?

The Two-Wire Interface (TWI) link operates at speeds up to 400kbit/s, allowing for efficient communication with the host microcontroller.

Does the AT83C26 provide ESD protection for smart card pins?

Yes, the device includes 4kV+ ESD protection on smart card pins, compliant with MIL/STD 883 Class 3 standards, ensuring reliability in harsh environments.