BU8763FV

BU8763FV Communications Melody LSI for Cellular Phone BU8763FV BU8763FV is a melody LSI for cellular phones that can produce triple chords simultaneously. Tone and volume in each sound source can be controlled separately by serial control. Master volume is integrated. Master clock can be selected from 5.376MHz or 2.688MHz. Output can be changed sine wave or special square wave. The special square wave is a waveform that can take sound pressure by even a small speaker. !Applications Melody sound at receiving or holding a call !Features 1) Generating 3 waves, Controlled by CPU 2) Selectable master clock (5.376MHz / 2.688MHz) 3) Changeable parameter for wave generate 4) Including DTMF create function 5) Changeable Sine wave or special square wave 6) Serial control from CPU 7) Include smoothing filter (fc=20KHz) 8) SSOP-B16 package !Absolute maximum ratings (Ta=25°C) Parameter Symbol DVDD AVDD VDIN VAIN Pd Tstg Topr + Limits −0.3 to +4.5 −0.3 to +4.5 DVSS−0.3 to DVDD+0.3 AVSS−0.3 to AVDD+0.3 450∗ −50 to +125 −20 to +70 Unit V V V V mW °C °C Digital supply voltage Analog supply voltage Input voltage for digital Input voltage for analog Power dissipation Storage temperature range Operating temperature range ∗ To use at temperature higher than 25 C, derate 4mW / C, PCB(70mm 70mm, d=1.6mm glass epoxy) 1/11 BU8763FV Communications !Block diagram TEST1 TEST2 TEST3 TEST4 DGND 16 16 15 14 13 12 11 10 TEST CIRCUIT WAVE GEN 1(h) WAVEFORM GENERATOR WAVE GEN 2(m) WA...