t one generator lsi for cellular phones BU8768FV description dimension (units : mm) features applications the BU8768FV is a tone generator ic for cellular phones that can produce triple chords simultaneously . t one 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 . 00w121a 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 ssop-b16 melody sound at receiving or holding a call. december , 2000 0.15 0. 1 0.22 0. 1 1. 15 0.1 0.65 0. 1 1 8 0.3min. 0. 1 6.4 0.3 9 16 4.4 0.2 5.0 0.2
absolute maximum ratings (t a=25 ? c) analog block supply voltage a vdd 2.7 ? ? 289.0 20 ? 3.0 ? 1.2 342.5 ? ? 3.6 1.8 2.5 415.4 ? 100 v a ma mv rms k ? pf idd1 idd2 v out rload cload current consumption 1 current consumption 2 aout maximum output (1 sound source) level load resistance load capacity dif ference with dvdd: less than 0.3v clock stop at sleep mode operating: a tt123=000, f=986hz pseudo-sine wave a tt123=000, f=986hz pseudo-sine wave electrical characteristics (unless otherwise noted; t a=25 ? c, dvdd=a vdd=3.0v) symbol min. max. unit conditions t yp. parameter digital block supply voltage analog block supply voltage digital pin applied voltage analog pin applied voltage parameter symbol limits unit dvdd a vdd vdin v ain dvdd+0.3 a vdd+0.3 dvss ? 0.3 a vss ? 0.3 ~ ~ +4.5 +4.5 ? 0.3 ? 0.3 ~ ~ v v v v power dissipation storage temperature range operating temperature range pd t stg t opr 450 +125 +70 ? 50 ? 20 ~ ~ mw ? c ? c * block diagram 1 2 3 4 5 6 7 8 BU8768FV smoothing fil ter aout test4 rstb sstb sda t a sclk cksel mclk agnd a vdd test3 test2 test1 dgnd dvdd control register clock genera t or w a veform genera t or dac volume a tt 3 w a ve gen3(i) w a ve gen2(m) w a ve gen1(h) a tt 1 a tt 1 test circuit 15 16 14 13 12 1 1 10 9 prmod + *derating : 4mw/ ? c for operation above t a=25 ? c , ( 70mmx70mm, t=1.6mm) glass epoxy mounting .
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