Overview
MSM7545 is a secret talk LSI for cordless phones. The transmitter of this LSI keeps the baseband audio signal secret.
Speech and output. The receiving section of this LSI restores the confidential signal to the audio signal.

Features
● Enables confidential communication using wireless transmission path (0.3-3.0kHz)
● Simultaneous transmission and reception are possible
● Delay time is filter delay only
● Built-in band-pass filter before confidential circuit and low-pass filter after
● Built-in crystal oscillation circuit
● Wide operating power supply voltage range (2.8V to 5.5V)
● Package:
    16-pin plastic SOP (SOP16-P-300-1.27-K) (Product name: MSM7545MS-K)