TDA8035HN/C1,118

Specialized Overview

The TDA8035HN/C1,118 is a high-integrated smart card interface IC designed for 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 using 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 with full load. It supports clock frequencies up to 20 MHz via external inputs or crystal oscillators. The component is housed in an HVQFN32 package 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 triggered by hardware faults or software commands.
• Includes enhanced electrostatic discharge (ESD) protection exceeding 8 kV on the card side and integrated supply supervision to manage power-on spikes.
• Features three protected half-duplex bidirectional buffered I/O lines with built-in debouncing for card presence detection and multiplexed status signaling.

Specialized Applications

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

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging type and compliance standards. Ensure that the selected variant matches the required environmental specifications and RoHS directives for the intended deployment environment before finalizing procurement orders.

Specialized Selection Notes

Select this component for applications requiring low-power standby modes and robust card protection features. Consider the C1 version for standard ISO 7816 compliance, whereas the C2 version offers additional EMV 4.3 certification. Evaluate the thermal resistance characteristics relative to the PCB layout design to ensure adequate heat dissipation during continuous operation.

Specialized Part Context

This part belongs to the TDA8035HN series, serving as a cost-efficient successor to the TDA8024 and TDA8034 models. It maintains software compatibility with previous generations while offering improved integration and lower power consumption. The device is specifically engineered to replace older interfaces in modern smart card reader designs.

Specialized Replacement Considerations

The TDA8035HN/C1,118 is functionally compatible with the TDA8024 and TDA8034. Designers migrating from these legacy components can utilize existing software drivers with minimal modification due to the maintained software compatibility across the product family.

Specialized FAQ

How does the TDA8035 handle clock source configuration?

The device automatically detects whether an external clock is provided on the XTAL1 pin or if a crystal oscillator should be used on XTAL1 and XTAL2 pins. This detection occurs during each activation command without requiring extra configuration pins.

What is the mechanism for entering Deep Shutdown mode?

Deep Shutdown mode is entered by forcing the CMDVCCN input pin to a logic-high state while simultaneously setting the EN_5V/3VN and EN_1.8VN input pins to a logic-low state. This mode disables all circuits except for the OFFN pin status monitoring.

How is the card presence signal processed?

The PRESN pin includes a built-in debounce feature with a typical delay of 4.05 ms. This prevents false triggering caused by mechanical bouncing during card insertion or withdrawal, ensuring stable status reporting via the OFFN output.