TDA8035HN/C1,151

Specialized Overview

The TDA8035HN/C1,151 is a high-integrated smart card interface IC designed for low-power contact readers. It operates with a VDDP supply voltage range of 2.7 V to 5.5 V and an interface supply (VDD(INTF)) of 1.6 V to 3.6 V. The device generates regulated card supply voltages of 5 V, 3 V, or 1.8 V via an internal DC-to-DC converter. Power consumption varies by mode: deep shutdown current is typically 3 µA, while active mode currents reach up to 220 mA at 5 V. It supports clock frequencies up to 20 MHz and functions within an ambient temperature range of -25 °C to +85 °C.

Specialized Feature Summary

• Provides thermal and short-circuit protection on all card contacts with automatic activation and deactivation sequences.
• Includes enhanced electrostatic discharge (ESD) protection exceeding 8 kV on the card side.
• Features software compatibility with TDA8024 and TDA8034 for easy integration into existing designs.
• Supports three protected half-duplex bidirectional buffered I/O lines with built-in debouncing.

Specialized Applications

• Pay TV systems
• Electronic payment terminals
• Identification devices
• Banking IC card readers

Specialized Procurement Notes

Verify the specific ordering suffix

Specialized Selection Notes

Select the C1 version for standard functionality compliant with ISO 7816 and NDS standards. Choose the C2 version if compliance with EMV 4.3 payment systems is required. Ensure the design accommodates the HVQFN32 package dimensions and thermal requirements for the selected application environment.

Specialized Part Context

This component serves as the cost-efficient successor to the TDA8024 integrated contact smart card reader IC. It maintains functional compatibility with the TDA8034 while offering improved power efficiency in the 3 V supply domain. The device is part of the TDA8035HN series, specifically utilizing the HVQFN32 plastic thermal enhanced very thin quad flat package without leads.

Specialized Replacement Considerations

The TDA8035HN/C1 is the direct successor to the TDA8024. It is also software compatible with the TDA8034. Designers migrating from these legacy parts should verify pinout similarities and ensure that the new DC-to-DC converter capacitor values meet the specified ESR requirements.

Specialized FAQ

How does the TDA8035 handle external versus internal clock sources?

The device automatically detects whether an external clock is provided on the XTAL1 pin or if a crystal oscillator connected to XTAL1 and XTAL2 should be used. This detection occurs during each activation command.

What is the function of the CS (Chip Select) input?

The CS input allows multiple TDA8035 ICs to operate in parallel. When CS is low, system interface signals are latched, and I/O lines enter high impedance mode, preventing data transmission to or from the smart card.

How is the Deep Shutdown mode entered and exited?

Deep Shutdown is entered by setting CMDVCCN High and EN_5V/3VN and EN_1.8VN Low when the reader is inactive. It is exited by changing the state of any of these three control pins.