Part No.

VDD System
Clock
Program
Memory
Data
Memory
I/O 8-bit
Timer
PFD Stack Package
HT48R062 2.2V~5.5V 400kHz~8MHz 1Kx14 32x8 11 - - 1 16DIP/NSOP
HT48R05A-1 2.2V~5.5V 400kHz~8MHz  0.5Kx14 32x8 13 1 v 2 16NSOP/SSOP, 18DIP/SOP
HT48R06A-1
HT48C06
2.2V~5.5V 400kHz~8MHz 1Kx14 64x8 13 1 v 2 16NSOP/SSOP, 18DIP/SOP

Note:  Part Numbers including a "C" are mask version devices while "R" are OTP devices.