NXP Semiconductors TDA8002CT/A/C1,512

Overview

TDA8002CT/A/C1,512 from NXP Semiconductors (formerly Philips) is an ISO 7816-compliant IC card interface IC designed to sit between smart cards and microcontrollers. It delivers regulated 3 V or 5 V card supply (±5%), supports up to 12 MHz card clock generation with synchronous frequency changes, integrates thermal/short-circuit protection, and enables automatic activation/deactivation sequences for GSM, banking, and EMV payment terminals.

For engineers reviewing the TDA8002CT/A/C1,512 datasheet, TDA8002CT/A/C1,512 pinout, TDA8002CT/A/C1,512 application, or TDA8002CT/A/C1,512 equivalent, key selection criteria include its SO28 package compatibility, dual-voltage card supply capability (3 V/5 V), integrated step-up converter, sleep-mode current ≤150 µA, and ISO 7816/GSM11.11/EMV compliance for secure transaction systems.

Technical Context

The TDA8002CT/A/C1,512 implements a fully autonomous analog interface with three protected half-duplex buffered I/O lines (I/O, AUX1, AUX2), internal oscillator (2.5 MHz typ), and external crystal or STROBE clock support. Its sequencer executes deterministic activation (≤220 µs) and deactivation (50–100 µs) sequences per ISO 7816-3, including controlled VCC ramp-up/down and RST timing alignment.

It features dual-domain power management: VDDA/VDDD analog/digital supplies (3.0–6.5 V), on-chip voltage supervisor triggering ALARM pulses ≥6 ms during power transitions, and independent card-side ESD protection >6 kV. The chip select (CS) input enables parallel operation of multiple devices with high-impedance control of I/OUC/AUX1UC/AUX2UC when inactive.

Key Specifications

Pinout & Package

Package: SO28 - plastic small outline package, 28 leads, body width 7.5 mm (SOT136-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST8024B and SLB9635TT, the TDA8002CT/A/C1,512 uniquely combines integrated VCC generation, hardware ISO sequencing, and 6 kV card-side ESD in SO28 - reducing design risk and validation effort for high-volume payment and telecom readers.

Availability

TDA8002CT/A/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 long production lifecycles.

Supply support for TDA8002CT/A/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 specializing in secure connectivity solutions for automotive, industrial, and identification markets.

The TDA8002CT/A/C1,512 belongs to NXP's legacy smart card interface product line, engineered specifically for ISO 7816-3 compliant contact-based card readers in payment, telecom, and government ID applications.

FAQ

What is the maximum card clock frequency supported by the TDA8002CT/A/C1,512?

The TDA8002CT/A/C1,512 supports up to 12 MHz card clock frequency using its internal oscillator and programmable dividers. When driven by an external STROBE signal, it accepts clock inputs up to 20 MHz, enabling high-speed synchronous card communication. This capability is confirmed in the Quick Reference Data table and Functional Description section of the datasheet, where fCLK is specified as 0–12 MHz (internal) and STROBE frequency up to 10 MHz (with implied 20 MHz CLKOUT support).

Does the TDA8002CT/A/C1,512 require external components for VCC generation?

No, the TDA8002CT/A/C1,512 integrates a step-up converter and voltage regulation circuitry to generate either 3 V or 5 V card supply from the main VDD supply. External components required are only decoupling capacitors (e.g., 470 nF on VUP, 100 nF on VCC) as shown in Figures 16 and 17. No external LDO or DC-DC converter is needed, simplifying design and reducing bill-of-materials cost.

How does the TDA8002CT/A/C1,512 handle card presence detection?

Card presence is detected via the PRES pin, which is an active-LOW input monitoring the mechanical contact switch of the card reader. When a card is inserted, PRES is pulled LOW; removal causes it to go HIGH. The TDA8002CT/A/C1,512 uses this signal to trigger emergency deactivation if the card is removed mid-transaction, as described in the Fault Detection section and Figure 14. This function operates independently in all modes, including low-power sleep.

What protection features are built into the TDA8002CT/A/C1,512 for card-side reliability?

The TDA8002CT/A/C1,512 includes thermal shutdown at 135 °C, short-circuit current limiting (90 mA max on VCC), and >6 kV HBM ESD protection on all card-side pins (I/O, AUX1, AUX2, CLK, RST, VCC). These protections are explicitly documented in the Limiting Values and Characteristics tables, ensuring robust operation against insertion faults, environmental stress, and electrostatic discharge without requiring external protection devices.

Can multiple TDA8002CT/A/C1,512 devices be used in parallel, and how is this controlled?

Yes, multiple TDA8002CT/A/C1,512 devices can operate in parallel using the CS (chip select) input. When CS is HIGH, the device is enabled and drives I/OUC/AUX1UC/AUX2UC; when CS is LOW, those pins enter high-impedance state with 100 kΩ internal pull-ups, allowing shared bus operation. This capability is detailed in the Chip Selection and Pinning sections, confirming that CS is a dedicated control input for multi-device configurations.