Part No. VDD System
Clock
Program
Memory
Data
Memory
I/O Timer End-points Built-in IF
Block
Stack Package
8-bit 16-bit
HT82D20R
HT82D20A
3.3V~5.5V 12MHz 2Kx14 96x8 8 -- 1 2 x1 4 28SSOP
HT82D22R
HT82D22A
3.3V~5.5V 12MHz 4Kx15 160x8 10 1 1 3 x2 8 48QFN

Note: Part numbers including an "A" are mask version devices while "R" are OTP devices.