NXP Semiconductors TDA8002CT/C/C1,512

Overview

TDA8002CT/C/C1,512 from NXP Semiconductors (formerly Philips) is a complete ISO 7816-compliant analog interface IC for smart and memory card readers. It provides regulated 3 V or 5 V card supply (VCC(O)), integrated step-up converter, automatic activation/deactivation sequences, thermal/short-circuit protection, and up to 12 MHz card clock generation. It serves as the physical layer bridge between microcontrollers and contact-based IC cards in secure transaction systems.

For engineers reviewing the TDA8002CT/C/C1,512 datasheet, TDA8002CT/C/C1,512 pinout, TDA8002CT/C/C1,512 application, or TDA8002CT/C/C1,512 equivalent, key selection criteria include its dual-voltage card supply capability (3 V ±5% / 5 V ±5%), low-power sleep mode (<150 µA), ISO/EMV/GSM11.11 compliance, and SO28 package with validated 28-pin I/O mapping for card/microcontroller interfacing.

Technical Context

The TDA8002CT/C/C1,512 implements a dedicated analog front-end architecture with three protected half-duplex bidirectional I/O transceivers (I/O, AUX1, AUX2), internal voltage doubler (S1/S2/VUP), and programmable clock circuitry supporting both internal oscillator (2.5 MHz typ.) and external STROBE input. Its sequencer executes deterministic activation (≤220 µs) and deactivation (50–100 µs) sequences per ISO 7816-3.

It integrates independent digital (VDDD/DGND2) and analog (VDDA/AGND) supply domains, on-chip supply supervisor with ALARM pulse output (≥6 ms), and open-drain interrupt outputs (ALARM, OFF) with defined timing for fault handling (e.g., card removal, overcurrent, overheating at 135 °C).

Key Specifications

Pinout & Package

Package: SO28 - plastic small outline package, 28 leads, body width 7.5 mm (SOT136-1). Pin pitch 1.27 mm, thermal resistance 70 K/W (junction-to-ambient, free air).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar IC card interface applications.

Compared with SLB9645TT10F and MAX3232ESE+, the TDA8002CT/C/C1,512 delivers fully integrated, standards-compliant IC card interfacing in one SO28 package - reducing bill-of-materials, PCB area, and firmware development time for new reader designs targeting banking, telecom, and transport applications.

Availability

TDA8002CT/C/C1,512 is available at Aetrix Electronics and suitable for GSM SIM readers, EMV banking terminals, electronic payment kiosks, and road tolling systems requiring stable component supply across long product lifecycles.

Supply support for TDA8002CT/C/C1,512 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The TDA8002CT/C/C1,512 belongs to NXP's legacy smart card interface product line, designed specifically to simplify and accelerate development of ISO 7816-compliant contact card readers for secure financial, identity, and telecommunications systems.

FAQ

What is the primary function of the TDA8002CT/C/C1,512 in an IC card system?

The TDA8002CT/C/C1,512 serves as a complete analog interface between a microcontroller and contact-based smart or memory cards. It handles all physical layer functions: generating and regulating the card supply voltage (VCC(O)), providing ISO 7816-compliant clock (CLK) and reset (RST) signals, managing bidirectional data I/O with protection, and executing automatic activation/deactivation sequences. This eliminates the need for discrete regulators, oscillators, and protection components in the reader design.

Does the TDA8002CT/C/C1,512 support both 3 V and 5 V smart cards?

Yes, the TDA8002CT/C/C1,512 supports both 3 V and 5 V smart cards through its CV/TV pin. When CV/TV is driven HIGH, the device regulates VCC(O) to 5 V ±5%; when driven LOW, it regulates to 3 V ±5%. This selection must be made before initiating the activation sequence via CMDVCC. The output can deliver up to 55 mA, meeting ISO 7816-3 requirements for both voltage classes.

How does the TDA8002CT/C/C1,512 handle fault conditions such as card removal or overcurrent?

The TDA8002CT/C/C1,512 continuously monitors for faults including short-circuit on VCC, card removal during transaction, VDD drop, and overheating (shutdown at 135 °C). Upon detection, it asserts the open-drain OFF pin LOW and initiates an emergency deactivation sequence. If the card remains present after deactivation, OFF returns HIGH only after the microcontroller pulls CMDVCC HIGH; otherwise, OFF stays LOW to indicate card absence.

What is the role of the S1, S2, and VUP pins on the TDA8002CT/C/C1,512?

The S1, S2, and VUP pins implement the internal step-up converter that generates the card supply voltage (VCC(O)) from the host supply (VDD). S1 and S2 connect to external capacitors forming a charge-pump doubler; VUP is the intermediate voltage node. This allows the TDA8002CT/C/C1,512 to produce 5 V VCC(O) even when powered from a 3.3 V VDD source - a critical feature for modern low-voltage host systems.

Can multiple TDA8002CT/C/C1,512 devices be used on the same microcontroller bus?

Yes, the TDA8002CT/C/C1,512 includes a dedicated chip select (CS) input enabling parallel operation. When CS is HIGH, the device responds to control inputs (CLKSEL, CMDVCC, etc.) and drives I/OUC/AUX1UC/AUX2UC. When CS is LOW, those pins enter high-impedance state and internal latches hold prior control states - allowing multiple TDA8002CT/C/C1,512 units to share a common microcontroller data/address bus without contention.