Overview
The TDA8024T/C1,518, produced by NXP USA Inc., is a comprehensive and cost-efficient analog interface designed for asynchronous 3 V or 5 V smart cards. This integrated circuit can be placed between the smart card and the microcontroller to handle all supply, protection, and control functions. It requires very few external components, making it an efficient solution for smart card interfaces. The TDA8024AT is a direct replacement for the TDA8004AT, ensuring compatibility and ease of transition for existing designs.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 2.7 | 6.5 | V | ||
| Card Supply Voltage (VCC) | 3 V or 5 V ± 5% | V | |||
| Current Consumption (ICC) | VDDP = 4 V to 6.5 V | 80 mA | mA | ||
| Operating Temperature (Tamb) | -25 | 85 | °C | ||
| Power Dissipation (Ptot) | Continuous operation | 0.56 W | W | ||
| ESD Protection | Card side | >6 kV | kV | ||
| Crystal Oscillator Frequency | 26 MHz | MHz | |||
| Clock Generation | Up to 20 MHz | MHz |
Key Features
- IC card interface compatible with ISO 7816, GSM11.11, and EMV (payment systems) standards.
- Three specifically protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7, and C8.
- DC-to-DC converter for VCC generation separately powered from a 5 V ± 20% supply (VDDP and PGND).
- Thermal and short-circuit protection on all card contacts.
- Automatic activation and deactivation sequences initiated by software or hardware in the event of a short-circuit, card take-off, overheating, VDD or VDDP drop-out.
- Enhanced ESD protection on the card side (>6 kV).
- Integrated 26 MHz crystal oscillator and clock generation for cards up to 20 MHz (divided by 1, 2, 4, or 8 through CLKDIV1 and CLKDIV2 signals).
- Non-inverted control of RST via pin RSTIN.
Applications
The TDA8024T/C1,518 is widely used in various applications involving smart card interfaces, including but not limited to:
- Payment systems (EMV compliant)
- Mobile communication devices (GSM11.11 compliant)
- Secure authentication systems
- Smart card readers and writers
- Industrial control systems requiring secure data exchange
Q & A
- What is the primary function of the TDA8024T/C1,518?
The primary function is to serve as a complete and cost-efficient analog interface for asynchronous 3 V or 5 V smart cards, handling supply, protection, and control functions between the card and the microcontroller. - What are the compatible voltage supplies for the TDA8024T/C1,518?
The device supports 3 V or 5 V supply for the IC (VDD and GND) and a separate 5 V ± 20% supply (VDDP and PGND) for VCC generation. - What kind of ESD protection does the TDA8024T/C1,518 offer?
The device offers enhanced ESD protection on the card side, exceeding 6 kV. - What are the key protection features of the TDA8024T/C1,518?
The device includes thermal and short-circuit protection on all card contacts, as well as automatic activation and deactivation sequences. - Is the TDA8024T/C1,518 compliant with any specific standards?
Yes, it is compliant with ISO 7816, GSM11.11, and EMV (payment systems) standards. - What is the maximum clock frequency supported by the TDA8024T/C1,518?
The device supports clock generation for cards up to 20 MHz. - How does the TDA8024T/C1,518 handle current spikes?
The device can handle current spikes of 40 nA up to 20 MHz. - What is the purpose of the DC-to-DC converter in the TDA8024T/C1,518?
The DC-to-DC converter generates the VCC supply voltage separately powered from a 5 V ± 20% supply (VDDP and PGND). - Can the TDA8024T/C1,518 be used in place of the TDA8004AT?
Yes, the TDA8024AT is a direct replacement for the TDA8004AT. - What is the operating temperature range of the TDA8024T/C1,518?
The operating temperature range is from -25°C to 85°C.
