■ GENERAL DESCRIPTION
The NJM2177A is a Dolby Pro Logic Surround Decoder containing modified B-Type noise reduction circuit, input auto-balance controller, noise sequencer, adaptive matrix and more.
The NJM2177A performs complete Dolby Pro Logic Surround function combined with the NJU9702 digital delay IC.

■ FEATURES
● Operating Voltage 9 to 13V
● Dolby Operating Level 300mVrms
● Low Operating Current 34mA typ.
● Dolby Pro Logic Surround decoding
● Internal Mode Control Switch
● Noise Sequencer Controlled by Two Bits
● Bipolar Technology
● Package Outline SDIP56, TQFP64