MSM7532中文資料沖電線數(shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION

The MSM7532 is a baseband device with a modem function and a baseband voice signal processing function for analog cordless telephone. The voice signal transmitter in this IC consists of a high-pass filter, compressor, scrambler, pre-emphasis, limiter, and splatter filter.

The voice signal receiver consists of a bandpass filter, a de-scrambler , a de-emphasis, an expander, an electronic volume, and a ceramic receiver driving circuit.

The MODEM in this IC transmits and receives MSK (Minimum Shift Keying) modem signals.

FEATURES

? Built-in ceramic receiver drive amplifiers

? The compander input reference level, limiter level, and modem transmit level are easy to be externally adjusted.

? Built-in 2-bit electronic volume

? A microphone amplifier and an amplifier available for users are built in.

? Mode settings using parallel interfaces

? Built-in compander dynamic range: 70 dB

? Built-in maximum gain limit circuit for expander

? The bit rate of MSK modem is switchable between 2400 bps and 1200 bps.

? Scrambler and emphasis can be used by serially connecting them or can be used separately with each other.

? Three kinds of the reverse frequency of the scrambler are selectable.

? The modem receiver functions detect bit synchronous signals and frame synchronous signals.

? Four-step power down modes

? Built-in crystal oscillation circuit

? Wide range of power supply (1.8 V to 5.5 V)

? Package:

56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name : MSM7532GS-2K)