AK2358A

ASAHI KASEI [AK2358AI i Features 1 1 Built-in voice filter for cordless telephone, MSK MODEM (2400bps), COMPANDOR, and scrambler circuit 1 Low / wide operation voltage range (1.9 V to 5. 5V) 1 Built-in COMPANDOR output transient response circuit and time constant circuit 1 No external component is needed for COMPANDOR 1 Built-in buffer amplifier for ceramic receiver driving. 1 Built-in electronic volume for u icrophone sensitivity and modulator/demodulator sensitivity u Receiving level switchable in 8 steps (-12 to +9dB) 1 Built-in muting function for voice transmitting and receiving 1 External adjustment for the limiter level- u Built-in amplifier for transmission and reception gain adjustment 1 Low power CMOS and power-down function u Built-in 3.58MHz oscillator circuit 1 Scrambler circuit with frequency inversion. Two inversion frequencies can be selected. 1 Bypassing the scrambler circuit available u Built-in frame detection function for the MSK demodulator 1 Control register and MSK MODEM data buffer controlled by serial interface 1 Few external component is necessary resulting cost reduction and small set size. u Package: 24 pin VSOP 1 Block Diagram I microphone input T% D a t a / l x D a t a Control data frase d e t e c t i o n Receiver Transmission signal output 3. 58MEz Receptlnn s i g n a l Input 0151 E-00 Recept 100 o u t p u t -1 1996 12 0 ul m o N 4 IT . I ....................... 3: TDATA TCLK DIR SCLK 9 .................... A 5 I I ...