PT2314E Stereo Audio Processor for Home/TV Audio DESCRIPTION FEATURES The PT2314E is an audio processor designed for versatile application, includes 4 stereo input selector with adjustable gain, master volume control with low frequency loudness compensation, speaker output attenuator and tone control. It is a good solution for the home audio signal processing. • 4 stereo inputs with gain selection, range from 0dB to +11.25dB in 3.75dB/step • Master volume from 0 dB to -78.75dB in 1.25dB/step • Speaker attenuator for balance, range from 0dB to -38.75dB in 1.25dB/step • Each channel output can be muted individually. • Low frequency loudness compensation • Bass and Treble control, range from -14dB to +14dB in 2dB/step • Wide operation range (VDD=4V to 10V) • Low harmonic distortion, low noise • Improved and replace PT2314 and PT2314A Due to the high reliability requirement from the audio business, the PT2314E improves both audio performances and input surge current capability, these causes the PT2314E is the best solution for the cost-effective audio systems. APPLICATIONS • Flat Panel TV • Home Audio System • Powered Speaker System APPLICATION CIRCUIT PT2314E VDD Input Surge Protection L AUDIO 4 R L AUDIO 3 R L AUDIO 2 R L AUDIO 1 R 2.7n 2.7n 2.2K 2.2uF 2.2K 2.2uF 2.2uF 100n 1 VDD REF 28 2 AGND SCL 27 3 TREB_L SDA 26 4 TREB_R OUT_L 24 6 ROUT OUT_R 23 BOUT_R 22 8 RIN4 BIN_R 21 9 RIN3 BOUT_L 20 10 RIN2 BIN_L 19 2.2K 2.2uF 11 RIN1 LOUT 18 2.2K 2.2uF 12 LOUD_L 2.2K 2.2uF 2.2K 2.2uF 2.2K 2.2K 2.2uF 2.2uF 100n MCU DGND 25 5 RIN 7 LOUD_R 22uF LIN 17 13 LIN4 LIN1 16 14 LIN3 LIN2 15 Front Left 10uF 10uF 100n Front Right 5.6K 100n Power Amplifier 100n 100n 5.6K 2.2uF Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2314E BLOCK DIAGRAM Speaker Attenuator With Mute OUT_R OUT_L REF REF TREBLE TREB_L BIN_L TREBLE Master Volume BASS BOUT_L REF LOUD_L TREB_R BIN_R BASS BOUT_R REF Loud SW LOUDNESS LOUDNESS LOUD_R LIN LOUT LIN4 LIN3 LIN2 LIN1 Input SW and GAIN REF VDD RIN ROUT RIN4 RIN3 RIN2 RIN1 REF INT Ref SCL REF BIAS REF I2C DECODER SDA DGND AGND V1.0 2 January 2010 PT2314E ORDER INFORMATION Valid Part Number PT2314E-S Package Type 28 Pins, SOP, 300mil Top Code PT2314E PIN CONFIGURATION VDD 1 28 REF AGND 2 27 SCL TREB_L 3 26 SDA TREB_R 4 25 DGND RIN 5 24 OUT_L ROUT 6 23 OUT_R LOUD_R 7 PT2314E RIN4 8 21 BIN_R RIN3 9 20 BOUT_L RIN2 10 19 BIN_L RIN1 11 18 LOUT LOUD_L 12 V1.0 22 BOUT_R 17 LIN LIN4 13 16 LIN1 LIN3 14 15 LIN2 3 January 2010 PT2314E PIN DESCRIPTION Pin Name VDD AGND TREB_L TREB_R RIN ROUT LOUD_R RIN4 RIN3 RIN2 RIN1 LOUD_L LIN4 LIN3 LIN2 LIN1 LIN LOUT BIN_L BOUT_L BIN_R BOUT_R OUT_R OUT_L DGND SDA SCL REF V1.0 I/O I I I O I I I I I I I I I I I O I O I O O O I I - Description Supply input voltage Analog ground Left channel input for treble controller Right channel input for treble controller Right channel volume controller input Right channel Input selector output Right channel loudness input Right channel input 4 Right channel input 3 Right channel input 2 Right channel input 1 Left channel loudness input Left channel input 4 Left channel input 3 Left channel input 2 Left channel input 1 Left channel volume controller input Left channel Input selector output Left channel input for bass controller Left channel output for bass controller Right channel input for bass controller Right channel output for bass controller Right channel output Left channel output Digital ground I2C data input I2C clock input Analog reference voltage (1/2VDD) 4 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 January 2010 PT2314E IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.0 5 January 2010