DESCRIPTION
The PT2307 is an integrated audio power amplifier utilizing CMOS Technology. In the input section 2 microphone and 2 stereo audio inputs are supported, and also provides a stereo earphone output and a 1W low noise mono power amplifier for speaker out. The earphone output could be selected in dual mode (A or B) for various applications. The major functions is controlled via the I2C bus such like wide range volume control (0dB ~ -90dB), and the earphone output volume could fine tuning (0dB ~ -10.5dB) to matching the speaker output volume.

FEATURES
• 1W (8Ω) mono channel speaker output + stereo earphone driver
• Digital volume control
    - Main volume: 32 steps/0dB ~ -90dB
    - Earphone volume: 8 steps/0dB ~ -10.5dB
• 2 microphone inputs, 1 microphone output
• 2 stereo audio inputs, selected via I2C bus
• Output coupling capacitor-free earphone output (PT2307-A)
• Dual earphone output mode (A/B) Integrated. (PT2307-A or PT2307-B)
• Mute function
• Shutdown (power save) mode
• I 2C register keeps the last status when the shutdown active
• Each section can be turn off individually for most power saving
• Over Temperature protection
• Very low pop noise in mode changed
• Wide operating voltage: 2V ~ 6V
• Available in 24 Pins TSSOP

APPLICATIONS
• PDA
• Portable mini audio system
• Multimedia audio household appliances system