Signetics NE649
The NE649 is an audio noise reduction circuit designed for use in low voltage entertainment systems. The circuit is used to reduce the level of background noise introduced during the recording and playback of audio signals on magnetic tape and improve the noise level in FM broadcast reception. The circuit is intended for use in automotive and portable cassette DolbyTM B-Type noise reduction systems.| Part No. | NE649 |
|---|---|
| Datasheet | NE649 Download |
| Manufacturer |  Signetics |
| Description | Low Voltage Dolby Noise Reduction Circuit |
| Buy | Stock & Price |
DESCRIPTION
This circuit is available only to licensees of Dolby Laboratories Licensing Corp., San Francisco. PIN CONFIGURATION N Package Dolby is a trademark of Dolby Laboratories Licensing Corporation FEATURE● Low voltage operation APPLICATION
● Tape decks ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE 16-Pin Plastic DIP ORDER CODE NE649NABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER Vcc Supply voltage TA Operating temperature range TSTG TSOLD Storage temperature range Lead soldering temperature 10sec max RATING 16 -40 to +85 -65 to + 150 +300 UNIT V °C °C °C BLOCK DIAGRAM 16 October 7, 1987 INPUT AMP 185 853-1193 90826 Low Voltage Dolby● Noise Reduction Circuit Product Specification NE649 DCELECTRICAL CHARACTERISTICS
Vee = 9V, f = 20Hz to 20kHz. All levels referenced to 580mVRMS (OdB) at Pin 3, TA = + 25°C, unless otherwise specified. SYMBOL PARAMETER Vcc Supply voltage range3 Minimum voltage supply for 8dB headroom 10dB headroom Icc Supply Current Icc Supply Current1 Av Voltage g...
