This project is an initial setup for a digital voltmeter design that intends to use the ICL7106CPL Integrated Circuit (IC). The ICL7106CPL is a single-channel, single analog-to-digital converter (ADC) that is optimal for direct interface to a seven-segment LED display.

In this given state, the design is incomplete because there are no established electrical connections between the components. Just the IC and its pin details are laid out.

The ICL7106CPL has 40 pins, and each one for this specific project seems to be assigned a Designator for the future connection. The Designator generally serves as a unique identifier for individual components in a circuit. In this case, they could possibly represent connections for different segments and attributes of a 3.5 digit multi-segment display.

For example, Designators like A1, B1, etc., could correspond to the segment controls for the display, with each pin controlling a specific segment. Input pins like IN_LO and IN_HI might be used to connect your voltage source for measurements whereas V+ and V- will power the IC itself.

Please note that the specific use of these designators would need to be interpreted based on the actual schematic you'd want to design.