LTC4556EUF#TRPBF

Specialized Overview

The LTC4556EUF#TRPBF is a smart card interface IC manufactured by Analog Devices Inc. It provides power control, level translation, and supervisory functions for ISO7816-3 and EMV compatible smart cards. The device operates with an input supply voltage (VBATT) ranging from 2.7V to 5.5V and features a low operating current of 250µA typical. It includes a buck-boost charge pump capable of generating 5V, 3V, or 1.8V outputs for different smart card classes. The component interfaces via a 4-wire serial port and is housed in a 24-lead 4mm × 4mm QFN package.

Specialized Feature Summary

• Supports daisy-chained serial ports for multicard applications
• Includes automatic shutdown on electrical faults
• Features dynamic pull-ups for fast signal rise times
• Provides extensive security features against supply faults

Specialized Applications

• Handheld payment terminals
• ATM machines
• POS terminals
• Computer keyboards

Specialized Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging rather than tube packaging. Confirm that the E-grade temperature range (-40°C to 85°C) matches the design requirements. Ensure the manufacturer is identified as Analog Devices Inc. when sourcing components.

Specialized Selection Notes

Select this component for designs requiring integrated smart card power generation and level shifting. The 4mm x 4mm QFN package suits space-constrained layouts. Verify compatibility with synchronous and asynchronous card protocols before finalizing the bill of materials.

Specialized Part Context

This part belongs to the LTC4556 series of smart card interface controllers. It is functionally equivalent to the LTC4556EUF#PBF but utilizes tape and reel packaging instead of tubes. Both variants share identical electrical specifications and pin configurations.

Specialized Replacement Considerations

LTC4556EUF#PBF

Specialized FAQ

What are the available smart card voltage options?

The LTC4556 supports 5V, 3V, and 1.8V outputs, corresponding to Smart Card Classes A, B, and C.

How does the device handle multiple sockets?

Multiple devices can be connected in a daisy-chain fashion using the serial port, allowing the number of wires to remain independent of the socket count.

What protection is provided against electrostatic discharge?

The smart card pins can withstand greater than 10kV ESD in-situ without additional components.