BU8776KN Datasheet | LSI Computer Systems

Description BU8776KN is PCM CODEC deveolped for digital cellular phones. High-precision linear CODEC and each audio part are integrated into a single chip by mixed signal technology. pact and thin QFN48U package is adopted. Dimension (Units : mm) 1.4 ± 0.1 0.6 +0.1 -0.3 7.2 ± 0.1 7.0 ± 0.1 36 25 24 8± 7.2 ± 0.1 7.0 ± 0.1 48 1 12 0.2 ± 0.05 Features 1) +3V single power supply (VDD=2.7~3.3V) 2) 14bit high-precision linear µ/A-LAW CODEC 3) Transmission filter in CODEC (Based on ITU-T G.714) 4) Built-in PLL circuit for generating system clock 5) Built-in DSP I/F for PDC, N-CDMA 6) Serial I/F for register setting adapted for 3-wire serial type 7) Selectable PCM data transmission clock frequency µ/A-LAW 64k Hz~2048k Hz Linear 128k Hz~2048k Hz 8) Wide variety of Analog I/O functions - Built-in two microphone amplifiers (Differential input type, single input type) - Built-in speaker amplifier for receiver (32 BTL type) - Built-in speaker amplifier for earphone (32 single type) - Built-in driver amplifier for receiving REXT (600 ) - Built-in electronic volume for gain control (Receiving, Transmitting, TONE) - Built-in deta signal I/O circuit can connect outside - REXT, earphone, and receiver output reduce the pop noise by soft mute when power is ON/OFF. 9) QFN48U small, thin package 0.4 0.18 ± 0.05 0.05 M 12° 12° QFN48U Applications PDC/CDMA/GSM type digital cellular phones November, 2001 0.01+0.03 -0.007 0.6 ± 0.1 0.8 +0.2 -0.1 5 0. 5.1 0 .4 + 0 4 0. 35.1 0 .3 + 0 Application Circuit CPU‚Ö Frame Synchronizing signal 8KHz TEXTADD TEXTDO PLLLPF TEXTDI TAUDO FSYNC TXVDD MIC2O TEXT C11 R8 MIC2IN -...