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MSM7583

π/4 Shift QPSK MODEM

Oki Electric Industry 

E2U0036-28-81

¡ ¡ SemicondSucetormiconductor

MSM7583

p/4 Shift QPSK MODEM

This version: AMugS.M19795883

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

I2 + Q2 (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-down Mode: 0.03 mA Typ. (VDD = 5.0 V)

• Package:

64-pin plastic QFP (QFP64-P-1414-0.80-BK)(Product name : MSM7583GS-BK)

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