MSM7583

E2U0036-28-81 ¡ Semiconductor ¡ Semiconductor MSM7583 p/4 Shift QPSK MODEM This version: Aug. 1998 MSM7583 Previous version: Nov. 1996 GENERAL DESCRIPTION The MSM7583 is a CMOS IC for the p/4 shift QPSK modem developed for the digital cordless telephone systems. The device, which contains one system of modulator and two systems of demodulater, is optimized for applications for cell stations in a cordless telephone system. FEATURES Single +5 V Power Supply: 4.5 V to 5.5 V (Modulator Block) Built in Root Nyquist Filter for Baseband Limitting (50% Roll-off) Ramp Bit for Burst Signal Rise-up (Fall-down) : 2 Symbols Built-in D/A converters for Analog Outputs of Quadrature Signal I/Q Components and I 2 + Q 2 (Analog) Power Envelope Output. Differential I/Q Analog Output Type I/Q Output, DC Offset/Amplitude Adjustable (Demodulator Block) Built-in Diversity-corresponding Demodulation Circuit: 2 Systems Full Digital p/4 Shift QPSK Demodulation System Input IF Signal Frequency Selectable: 1.2/10.7/10.75/10.8 MHz Built-in Clock Recovery: 4 Circuits Transmit/Receive Independent Power-down Control capability Built-in Precise Analog Voltage Reference MCU Serial Interface for Mode Setting and Built-in Test Circuit Test Modes: Eye Pattern/AFC Compensating Signal/Phase Detection Signal Monitoring Capability Transmission Speed: 384 kbps Low Power Consumption Operating Mode: 16 mA Typ./Modulator (VDD = 5.0 V) 28 mA Typ./Demodulator (VDD = 5.0 V) Whole Power-d...