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See Technical Specifications

LTC4556EUF +BOM

Smart Card Interface with Advanced Serial Control for Enhanced Securi

Manufacturer:

Analog Devices, Inc
Mfr.Part #:

LTC4556EUF
Datasheet:

LTC4556EUF Datasheet (PDF)
Feature-maximum-operating-supply-voltage-v:

5.5
Feature-minimum-operating-supply-voltage-v:

2.7
Feature-packaging:

Tube
Feature-pin-count:

24
EDA/CAD Models:

Request Free CAD Models for LTC4556EUF

LTC4556EUF General Description

The LTC4556 provides all necessary power control, level translation and supervisory functions for a smart card or S.A.M. card interface. The part contains a low noise charge pump plus LDO for generating VCC power, as well as all necessary level shifting circuitry.

The card voltage can be set to either 1.8V, 3V or 5V. The LTC4556 includes a card detection channel with automatic debounce circuitry. To reduce wiring costs, the LTC4556 interfaces to a microcontroller via a simple 4‑wire serial interface. Multiple devices may be connected in daisy-chain fashion so that the number of wires to the card socket board is independent of the number of sockets. Status data is returned over the same interface.

Extensive security features ensure proper deactivation sequencing in the event of a supply fault or a smart card electrical fault. The smart card pins can withstand greater than 10kV ESD in-situ with no additional components. The LTC4556 is available in a small, low profile (0.75mm), 4mm × 4mm QFN package.

Key Features

Electrical Specifications Are ISO7816-3 and EMV Compatible
Control/Status Serial Port May be Daisy-Chained for Multicard Applications
Automatic Shutdown on Electrical Faults
Buck Boost Charge Pump Generates 5V, 3V or 1.8V Outputs (Smart Card Classes A, B and C)
Automatic Level Translation
Dynamic Pull-Ups Deliver Fast Signal Rise Times
Supervisory Functions Prevent Smart Card Faults
Low Operating Current: 250μA Typical
VIN: 2.7V to 5.5V
Ultralow Shutdown Current
Small 24-Lead 4mm × 4mm QFN Package

Application

Handheld Payment Terminals
Pay Telephones
ATM Machines
POS Terminals
Computer Keyboards
Multiple S.A.M. Sockets

Specifications

feature-maximum-operating-supply-voltage-v	5.5	feature-process-technology
feature-minimum-operating-supply-voltage-v	2.7	feature-packaging	Tube
feature-rad-hard		feature-pin-count	24
feature-cecc-qualified	No	feature-esd-protection
feature-escc-qualified		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc	Yes
feature-svhc-exceeds-threshold	Yes