The primitive leadless carrier is the most striking feature of these ICs. Note the asymmetrical design, built to interface with pre-existing edge connector components. More modern leadless designs feature pins exiting the carrier on two or four sides, and require a custom leadless socket.
Texas Instruments TMC1771SC calculator LSI, featuring a unique leadless ceramic carrier and enameled grey traces. This is the earliest leadless carrier currently known.
Texas Instruments TMC1772SC calculator LSI.
Texas Instruments TMC1773SC calculator LSI. These are some extremely unusual TI calculator chips, as all other known types are packaged in a standard plastic DIP.
AMI calculator LSI, two chips of unknown function.
