00W121A Tone generator LSI for cellular phones BU8768FV 5.0±0.2 9 1 0.65 0.15±0. 1 4.4±0.2 6.4±0.3 16 1. 15±0.1 The BU8768FV is a tone generator IC 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. Output can be selected from pseudo sine wave and special square wave. The special square wave is a waveform that can take sound pressure by even a small speaker. Dimension (Units : mm) 0. 1 Description 8 0.22±0. 1 0.3Min. 0. 1 SSOP-B16 Features 1) Three chords are generated by CPU control. 2) Master clock (4.8MHz/3.25MHz) 3) Adjustable parameter needed for generating chords. 4) Built-in DTMF generating function 5) Can select a waveform parameter for generating sound. 6) Control from CPU by serial data 7) Built-in LPF for smoothing 8) SSOP-B16 package Applications Melody sound at receiving or holding a call. December, 2000 Absolute Maximum Ratings (Ta=25˚C) Parameter Limits Symbol Unit Digital block supply voltage DVDD —0.3 ~ +4.5 V Analog block supply voltage AVDD +4.5 V DVDD+0.3 V AVDD+0.3 V Digital pin applied voltage VDin —0.3 ~ DVSS—0.3 ~ Analog pin applied voltage VAin AVSS—0.3 ~ * Pd Power dissipation Storage temperature range Tstg 450 —50 ~ +125 Operating temperature range Topr —20 ~ mW ˚C ˚C +70 *Derating : 4mW/˚C for operation above Ta=25˚C , (70mmx70mm, t=1.6mm) glass epoxy mounting . Electrical characteristics (Unless otherwise noted; Ta=25˚C, DVDD=AVDD=3.0V) Parameter Symbol Min. Typ. Max. Unit Analog block supply voltage AVDD 2.7 3.0 3.6 V Current consumption 1 Idd1 — — 1.8 µA Current consumption 2 Idd2 — 1.2 2.5 mA AOUT maximum output (1 sound source) level Load resistance Vout 289.0 342.5 415.4 mVrms Rload 20 — — Load capacity Cload — — 100 Conditions Difference with DVDD: Less than 0.3V Clock stop at sleep mode Operating: ATT123=000, f=986Hz pseudo-sine wave ATT123=000, f=986Hz pseudo-sine wave kΩ pF DVDD DGND PRMOD TEST1 TEST2 TEST3 AVDD AGND Block Diagram 16 15 14 13 12 11 10 9 TEST CIRCUIT ATT 1 WAVE GEN2(m) ATT 1 WAVE GEN3(I) ATT 3 + WAVEFORM GENERATOR WAVE GEN1(h) DAC VOLUME SMOOTHING FILTER CONTROL REGISTER CLOCK GENERATOR 2 3 4 5 6 7 8 MCLK CKSEL SCLK SDATA SSTB RSTB TEST4 AOUT BU8768FV 1