HT82A821R

Supply Voltage .................V_SS-0.3V to V_SS+6.0V
Input Voltage........................V_SS-0.3V to V_DD+0
Total Power Dissipation .........................500mW
Storage Temperature ................-50 to 125
Operating Temperature................-40 to 85
IOH Total...............................................-100mA

Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maximum Ratings" may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

This HT82A821R is an 8-bit high performance RISC-like microcontroller designed for USB Speaker product applications. They combines a 16-bit DAC, USB transceiver, SIE (Serial Interface Engine), audio class processing unit, FIFO, 8-bit MCU into a single chip. The DAC in the HT82A821R is operating at the 48kHz sampling rate. They has a digital programmable gain amplifier. The gain range is from -32dB to +6dB.

The HT82A821R has a Human Interface Device function that allows a user to control the playback volume at the device side. They also can mute the analog output signal by the operation of HID buttons.