UTDA8024 Overview
The UTC UTDA8024 is analog interface IC for 3V or 5V smart cards. It is placed between the card and the microcontroller to perform munication, control function, all supply and protection functions. It requires very few external ponents for application.
UTDA8024 Key Features
- Three specifically protected half-duplex bidirectional buffered I/O lines to card contacts C4, C7 and C8
- Automatic activation and deactivation sequences; initiated by software or by hardware in the event of a short-circuit, c
- 26MHz integrated crystal oscillator
- DC/DC converter for VCC generation separately powered from a 5 V ± 20% supply (VDDP and PGND)
- 3V or 5V ± 5% regulated card supply voltage (VCC) with appropriate decoupling has the following capabilities
- ICC<80mA at VDDP=4~6.5V
- Handles current spikes of 40nAs up to 20MHz
- Controls rise and fall times
- Filtered overload detection at approximately 120mA
- Built-in debounce on card presence contacts