¡ Semiconductor

MSM7582/7582B

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¡ Semiconductor

MSM7582/7582B

p/4 Shift QPSK MODEM

GENERAL DESCRIPTION

The MSM7582/7582B are CMOS ICs for the p/4 shift QPSK modem developed for the digital

cordless telephone systems.

The devices are designed for Personal and Cell station applications, the MSM7582B is the

improved MSM7582 in modulator burst rise-up and fall-down characteristics.

FEATURES

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(Modulator Block)

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• Built-in Root Nyquist Filter for Baseband Limiting (50% Roll-off)

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• Ramp Bit for Burst Signal Rise-up:

MSM7582/1.75 symbols

MSM7582B/2.0 symbols

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• Ramp Bit for Burst Signal Fall-down:

MSM7582/2.75 symbols

MSM7582B/2.0 symbols

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• Built-in D/A converters for Analog Output of Quadrature Signal I/Q Components and Power

Envelope Output

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• Differential I/Q Analog output format

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• I/Q Output DC Offset / Gain Adjustable

(Demodulator Block)

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• Full Digital System, p/4 shift QPSK Demodulation

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• Input IF signal Frequency Selectable: 1.2/10.7/10.75/10.8 MHz

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• Built-in Clock Recovery: 4 Circuits useful for Cell station

(Common)

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• Various Power-down Modes: Tramsmit/Receive Independant

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• Built-in Precise Analog Voltage Reference

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• MCU Serial Interface for Mode setting and Built-in Test circuit

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• Test Modes:

Eye pattern / AFC Compensating Signal / Phase Detection Signal, possible to

monitor

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• Transmission Speed: 384 kbps

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• Low Power consumption

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• Package:

32-pin plastic TSOP (TSOPI32-P-814-0.50-1K)(Product name : MSM7582TS-K)

(Product name : MSM7582BTS-K)

E2U0035-16-X2

This version: Jan. 1998

Previous version: Nov. 1996