Overview
The ST8024LCTR is a complete low-cost analog interface designed for asynchronous Class A, B, and C smartcards, developed by STMicroelectronics. This component can be placed between the smartcard and the microcontroller, requiring few external components to perform all necessary supply protection and control functions. It is compatible with various standards including ISO 7816, GSM11.11, and EMV 4.2, making it versatile for different applications.
Key Specifications
| Parameter | Description |
|---|---|
| Supply Voltage (VDD) | 3 V or 5 V |
| Card Supply Voltage (VCC) | 1.8 V ± 6.5%, 3 V or 5 V ± 5% |
| Package | TSSOP-28 |
| Operating Temperature | –25 to 85 °C |
| Card Interface | Three specifically protected half-duplex bi-directional buffered I/O lines to card contacts C4, C7, and C8 |
| Clock Generation | Up to 20 MHz (divided by 1, 2, 4 or 8) |
| Protection Features | Thermal and short-circuit protection, filtered overload detection, enhanced ESD protection (>6 kV) |
| Integrated Components | 26 MHz integrated crystal oscillator, built-in debounce on card presence contacts |
Key Features
- Designed to be compatible with the NDS conditional access system (except ST8024LTR)
- ISO 7816, GSM11.11, and EMV 4.2 (payment systems) compatible
- Step-up converter for VCC generation separately powered by a 5 V ± 20% supply (VDDP and PGND)
- Handles current spikes of 40 nA up to 20 MHz and controls rise and fall times
- Automatic activation and deactivation sequences initiated by software or hardware
- Enhanced ESD protection on card side (>6 kV)
- Built-in debounce on card presence contacts and one multiplexed status signal OFF
- Non-inverted control of RST via pin RSTIN
- Supply supervisor for spike-killing during power-on and power-off and power-on reset
Applications
- Smartcard readers for set-top boxes
- IC card readers for banking
- Identification and pay TV systems
- Automotive and industrial applications
Q & A
- What is the primary function of the ST8024LCTR?
The ST8024LCTR is a complete low-cost analog interface for asynchronous Class A, B, and C smartcards, providing all necessary supply protection and control functions. - What are the compatible standards for the ST8024LCTR?
The ST8024LCTR is compatible with ISO 7816, GSM11.11, and EMV 4.2 standards. - What are the available supply voltages for the ST8024LCTR?
The ST8024LCTR can operate with 3 V or 5 V supply voltages. - What is the operating temperature range of the ST8024LCTR?
The operating temperature range is –25 to 85 °C. - Does the ST8024LCTR have built-in protection features?
Yes, it includes thermal and short-circuit protection, filtered overload detection, and enhanced ESD protection. - What is the maximum clock frequency generated by the ST8024LCTR?
The ST8024LCTR can generate clock frequencies up to 20 MHz. - Does the ST8024LCTR have an integrated crystal oscillator?
Yes, it has a 26 MHz integrated crystal oscillator. - How does the ST8024LCTR handle card presence detection?
The ST8024LCTR includes built-in debounce on card presence contacts. - What types of applications is the ST8024LCTR suitable for?
The ST8024LCTR is suitable for smartcard readers in set-top boxes, IC card readers for banking, identification, and pay TV systems, as well as automotive and industrial applications. - What package options are available for the ST8024LCTR?
The ST8024LCTR is available in a TSSOP-28 package.
