NXP Semiconductors TDA8002CT/B/C1,512

Overview

TDA8002CT/B/C1,512 from NXP Semiconductors (formerly Philips) is an ISO 7816-compliant IC card interface IC designed to sit between smart cards and microcontrollers in secure transaction systems. It provides regulated 3 V or 5 V card supply (±5%), integrated step-up converter, thermal/short-circuit protection, automatic activation/deactivation sequences, and clock generation up to 12 MHz for synchronous/asynchronous memory and smart cards - deployed in banking terminals and GSM SIM readers.

For engineers reviewing the TDA8002CT/B/C1,512 datasheet, TDA8002CT/B/C1,512 pinout, TDA8002CT/B/C1,512 application, or TDA8002CT/B/C1,512 equivalent, key selection criteria include its dual-voltage card supply capability (3 V/5 V), 150 µA low-power sleep current, 200 kHz I/O data rate, ISO/EMV/GSM11.11 compliance, and SO28 package with chip-select support for multi-interface designs.

Technical Context

The TDA8002CT/B/C1,512 implements a fully autonomous analog interface with three protected half-duplex buffered I/O lines (I/O, AUX1, AUX2), internal voltage doubler (S1/S2/VUP), and programmable clock circuitry supporting XTAL oscillator (2–24 MHz), STROBE input, or internal RC oscillator (2.5 MHz active / 32 kHz sleep). Its sequencer executes precise activation (≤220 µs) and deactivation (50–100 µs) sequences per ISO 7816-3.

It integrates independent digital (VDDD/DGND2) and analog (VDDA/AGND) supplies, on-chip supply supervisor with 10 ms ALARM pulse, open-drain OFF interrupt (active LOW), and 6 kV ESD protection on card-side pins. Chip select (CS) enables parallel operation of multiple TDA8002Cs while isolating control and I/O paths via high-impedance latching.

Key Specifications

Pinout & Package

Package: SO28 - plastic small outline package, 28 leads, body width 7.5 mm (SOT136-1), surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SLB9670 and ST8020, the TDA8002CT/B/C1,512 delivers dedicated, pin-configurable analog interface functionality without crypto or USB overhead - enabling direct MCU integration, flexible voltage selection, and deterministic ISO 7816 timing control essential for certified payment and telecom applications.

Availability

TDA8002CT/B/C1,512 is available at Aetrix Electronics and suitable for GSM SIM readers, EMV payment terminals, banking kiosks, and road tolling systems requiring stable component supply across industrial temperature ranges (−25 to +85 °C) and long lifecycle support.

Supply support for TDA8002CT/B/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 markets, with roots in Philips' pioneering analog and interface IC development.

The TDA8002CT/B/C1,512 belongs to NXP's legacy smart card interface product line, engineered specifically for ISO 7816-3 compliant contact-based transaction systems where deterministic power sequencing, ESD robustness, and dual-voltage flexibility are mandatory.

FAQ

What is the maximum clock frequency the TDA8002CT/B/C1,512 can generate for the smart card?

The TDA8002CT/B/C1,512 supports up to 12 MHz card clock (CLK) output in active mode using its internal oscillator or external crystal. When driven by an external STROBE signal, it passes through up to 10 MHz - meeting ISO 7816-3 requirements for high-speed T=1 protocols. The TDA8002CT/B/C1,512 does not support >12 MHz card clocks; exceeding this may violate timing margins and cause communication errors.

Does the TDA8002CT/B/C1,512 support both 3 V and 5 V smart cards in the same design?

Yes, the TDA8002CT/B/C1,512 supports both 3 V and 5 V smart cards via the CV/TV pin: HIGH selects 5 V (4.6–5.4 V), LOW selects 3 V (2.76–3.24 V). This dual-voltage capability is hardware-controlled and verified across the full −25 to +85 °C range, enabling single-reader hardware to serve legacy and modern cards without manual switching or redesign.

How does the TDA8002CT/B/C1,512 handle card insertion and removal events?

The TDA8002CT/B/C1,512 monitors card presence via the PRES pin (active LOW). On insertion, it waits for CMDVCC assertion to begin activation; on removal during a session, it asserts the OFF interrupt (active LOW) and initiates emergency deactivation. The TDA8002CT/B/C1,512 ensures VCC falls after I/O lines go inactive - preventing bus contention and meeting ISO 7816-3 safety requirements.

What is the purpose of the S1 and S2 pins on the TDA8002CT/B/C1,512?

S1 and S2 are charge-pump capacitor connections for the integrated step-up converter. Together with VUP, they enable generation of 5 V card supply from a 3.3 V system rail - eliminating the need for an external boost regulator. The TDA8002CT/B/C1,512 specifies 470 nF capacitors (C5/C6) on S1/S2 per application diagram Fig.16, ensuring stable VUP output and clean VCC ramp.

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

Yes, the TDA8002CT/B/C1,512 includes a dedicated CS (chip select) input that enables parallel operation. When CS is HIGH, I/OUC/AUX1UC/AUX2UC mirror card-side signals and control inputs are active; when CS is LOW, those lines go high-impedance and control inputs are latched. This allows one MCU to manage several TDA8002CT/B/C1,512 interfaces independently - ideal for multi-slot card readers.