Overview
The ST8024CTR, produced by STMicroelectronics, is a complete low-cost analog interface designed for asynchronous 3 V and 5 V smart cards. It serves as an intermediary between the smart card and the microcontroller, requiring few external components to perform all necessary supply protection and control functions. The ST8024CTR is a direct replacement for the ST8004 and is optimized for various smart card applications.
Key Specifications
| Parameter | Description |
|---|---|
| Package | TSSOP-28 |
| Operating Temperature | -25°C to 85°C |
| Supply Voltage | 3 V or 5 V ± 5% |
| Card Supply Voltage | 3 V or 5 V ± 5% (VCC) |
| Current Consumption | ICC < 80 mA at VDDP = 4 to 6.5 V |
| Clock Frequency | Up to 20 MHz (divided by 1, 2, 4, or 8) |
| ESD Protection | > 6 kV on card side |
| Protection Features | Thermal, short-circuit, and overload protection |
Key Features
- 26 MHz integrated crystal oscillator
- Enhanced ESD protection on card side (> 6 kV)
- Non-inverted control of RST via pin RSTIN
- Clock generation for cards up to 20 MHz with synchronous frequency changes
- Supply supervisor for spike-killing during power-on and power-off and power-on reset
- ISO 7816, GSM11.11, and EMV (payment systems) compatibility
- One multiplexed status signal
- Built-in debounce on card presence contacts
- Thermal and short-circuit protection on all card contacts
- Automatic activation and deactivation sequences initiated by software or hardware
Applications
The ST8024CTR is primarily used in various smart card reader applications, including:
- Smartcard readers for set-top boxes
- IC card readers for banking and financial transactions
- Identification and security systems
- Pay TV systems
Q & A
- What is the primary function of the ST8024CTR?
The ST8024CTR is a complete low-cost analog interface for asynchronous 3 V and 5 V smart cards, acting as an intermediary between the card and the microcontroller.
- What are the supported operating temperatures for the ST8024CTR?
The operating temperature range is from -25°C to 85°C.
- What types of protection does the ST8024CTR offer?
The ST8024CTR offers thermal, short-circuit, and overload protection on all card contacts.
- Is the ST8024CTR compatible with any specific standards?
Yes, it is compatible with ISO 7816, GSM11.11, and EMV (payment systems) standards.
- What is the maximum clock frequency supported by the ST8024CTR?
The ST8024CTR supports clock frequencies up to 20 MHz, with division by 1, 2, 4, or 8.
- Does the ST8024CTR have built-in ESD protection?
Yes, it has enhanced ESD protection on the card side, exceeding 6 kV.
- How does the ST8024CTR manage power-on and power-off sequences?
The ST8024CTR includes a supply supervisor for spike-killing during power-on and power-off and power-on reset.
- What types of packages are available for the ST8024CTR?
The ST8024CTR is available in TSSOP-28 packages.
- Can the ST8024CTR be used in banking applications?
Yes, it is commonly used in IC card readers for banking and financial transactions.
- Does the ST8024CTR support automatic activation and deactivation sequences?
Yes, these sequences can be initiated by software or hardware in response to various events such as short-circuit, card take-off, overheating, or supply voltage drop-out.
