Description
The ELM621 is a serially controlled, three bit parallel I/O port in an 8 pin package. The high level of integration employed means that very few external components are required in order to construct a fully functional circuit with this IC.

Features
• Low power CMOS design - typically 1mA
• High speed (9600 baud) RS232 communications
• Standard ASCII commands and responses
• 16 byte receive buffer
• Switchable pullup resistance
• Minimum of external components required
• External reset input
• High current drive outputs - up to 25 mA

Applications
• Home automation monitoring and control
• Robotics
• Security monitoring
• IC programmers