Texas Instruments Model 500-2101 I/O Channel Controller
UCD3138A Highly Integrated Digital Controller - TI | Mouser
500-2109 Distributed Base Controller - In Stock, Buy Today
Amazon.com: 2 Pack 3.2ft USB Power Charger Cable Data Charging Cord for TI-84 Plus CE/ Plus C, TI Nspire CX/ CX CAS Texas Instruments Graphing Calculators, PS3 Controller and More - Type