General Description
The HT85XXX family is a series of programmable speech synthesizers and tone generators designed for user-defined voice and melody applications. It provides various sampling rates and beats, tone levels, tempos for the speech synthesizer and melody generator.

FEATUREs
• Operating voltage: 2.4V~5.0V
• Driver speaker (32Ω) VDD=4.5V, IDD=90mA
• Programmable tone melody generator
• ADPCM, μ-law PCM, PCM synthesis
• Wide range of sampling rate for voice synthesis
• Minimum sampling rate step: 100Hz
• Voice melody mixed output
• Programmable 2 channels of melody mixed output
• Programmable 2 channels of voice mixed output
• 13 kinds of melody beats
• 5 octaves of tone level and 18 tempos
• 16 levels of digital volume control
• Eight programmable I/O pins
• Four programmable input pins
• Provides 36 sec to 96 sec of voice capacity
• Timer controller
• Voice fill-in function
• Powerful user-defined functions
• Power-on initial setting
• 28-pin SKDIP package