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GENERAL DESCRIPTION

STw5093 is a high performance low power combined PCM CODEC/FILTER device tailored to implement the audio front-end functions required by low voltage/low power consumption digital cellular terminals. STw5093 offers a number of programmable functions accessed through a serial control channel that easily interfaces to any classical microcontroller. The PCM interface supports both non-delayed (normal and reverse) and delayed frame synchronization modes.

STw5093 can be configurated either as a 14-bit linear or as an 8-bit companded PCM coder.

FEATURES:

Complete CODEC and FILTER system including:

■ 14 BIT LINEAR ANALOG TO DIGITAL AND DIGITAL TO ANALOG CONVERTERS.

■ 8 BIT COMPANDED ANALOG TO DIGITAL AND DIGITAL TO ANALOG CONVERTERS ALAW OR μ-LAW.

■ TRANSMIT AND RECEIVE BAND-PASS FILTERS

■ ACTIVE ANTIALIAS NOISE FILTER.

Phone Features:

■ ONE MICROPHONE BIASING OUTPUT

■ REMOTE CONTROL (REMOCON) FUNCTION

■ THREE SWITCHABLE MICROPHONE AMPLIFIER INPUTS. GAIN PROGRAMMABLE:0 . . 42.5 dB AMPLIFIER, 1.5 dB STEPS (+ MUTE).

■ EARPIECE AUDIO OUTPUT. ATTENUATION PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS.

■ EXTERNAL AUDIO OUTPUT. ATTENUATION PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS.

■ DRIVING CAPABILITY: 140mW OVER 8?

■ TRANSIENT SUPRESSION SIGNAL DURING POWER ON AND DURING AMPLIFIER SWITCHING.

■ INTERNAL PROGRAMMABLE SIDETONE CIRCUIT. ATTENUATION PROGRAMMABLE: 16 dB RANGE, 1 dB STEP.

■ INTERNAL RING, TONE AND DTMF GENERATOR, SINEWAVE OR SQUAREWAVE WAVEFORMS. ATTENUATION PROGRAMMABLE: 27dB RANGE, 3dB STEP. THREE FREQUENCY RANGES:

a) 3.9Hz . . . . 996Hz, 3.9Hz STEP

b) 7.8Hz . . . . 1992Hz, 7.8Hz STEP

c) 15.6Hz . . . . 3984Hz, 15.6Hz STEP

■ PROGRAMMABLE PULSE WIDTH MODULATED BUZZER DRIVER OUTPUT.

General Features:

■ SINGLE 2.7V to 3.3V SUPPLY

■ EXTENDED TEMPERATURE RANGE OPERATION (*) -40°C to 85°C.

■ 1.0μW STANDBY POWER (TYP. AT 2.7V).

■ 13mW OPERATING POWER (TYP. AT 2.7V).

■ 1.8V TO 3.3V CMOS COMPATIBLE DIGITAL INTERFACES.

■ PROGRAMMABLE PCM AND CONTROL INTERFACE MICROWIRE COMPATIBLE. APPLICATIONS:

■ GSM/DCS1800/PCS1900/JDC DIGITAL CELLULAR TELEPHONES.

■ CDMA CELLULAR TELEPHONES.

■ DECT/CT2/PHS DIGITAL CORDLESS TELEPHONES.

■ BATTERY OPERATED AUDIO FRONT-ENDS FOR DSPs.