ST8024 Smartcard interface
The ST8024 is a complete low cost analog interface for asynchronous 3 V and 5 V smart cards. It can be placed between the card and the microcontroller with few external components to perform all supply protection and control functions. ST8024 is a direct replacement of ST8004.
Main applications are: smartcard readers for settop- box, IC card readers for banking, identification, pay TV
技术特性
- Designed to be compatible with the NDS conditional access system
- IC card interface
- 3 or 5 V supply for the IC (VDD and GND)
- Three specifically protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7 and C8
- DC-DC converter for VCC generation separately powered from a 5 V ± 20% supply (VDDP and PGND)
- 3 or 5 V ± 5 % regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities:
- Icc < 80 mA at VDDP = 4 to 6.5 V
- Handles current spikes of 40 nA up to 20 MHz
- Controls rise and fall times
- Filtered overload detection at approximately 120 mA
- Thermal and short-circuit protection on all card contacts
- Automatic activation and deactivation sequences; initiated by software or by hardware in the event of a short-circuit, card take-off, overheating, VDD or VDDP drop-out
- Enhanced ESD protection on card side (> 6 kV)
- 26 MHz integrated crystal oscillator
- Clock generation for cards up to 20 MHz (divided by 1, 2, 4 or 8 through CLKDIV1 and CLKDIV2 signals) with synchronous frequency changes
- Non-inverted control of RST via pin RSTIN
- ISO 7816, GSM11.11 and EMV (payment systems) compatibility
- Supply supervisor for spike-killing during power-on and power-off and power-on reset (threshold fixed internally or externally by a resistor bridge)
- Built-in debounce on card presence contacts
- One multiplexed status signal off
Circuit Diagram
ST8024 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| ST8024CTR |
Active |
0.783 |
1000 |
TSSOP 28 |
Tape And Reel |
-40 °C-85 °C |
ST8024CTR |
| ST8024CDR |
Active |
0.783 |
1000 |
SO-28 |
Tape And Reel |
-40 °C-85 °C |
ST8024CDR |
DATASHEET
| 下载 |
描述 |
版本 |
大小 |
| ST8024 |
Smartcard interface |
8 |
1032KB |
APPLICATION NOTES
| 下载 |
描述 |
版本 |
大小 |
| AN2269 |
AN2269: Using the ST8024 smartcard interface |
1 |
832KB |
| AN3275 |
AN3275: Improving the performance of smartcard interfaces using the ST8024 |
1 |
1853KB |
