MC33218ADW ,VOICE SWITCHED SPEAKERPHONE WITH レPROCESSOR INTERFACEMAXIMUM RATINGSRating Symbol Min Max UnitSupply Voltage V –0.5 7.0 VdcCCAny Input V –0.4 V + 0.4 Vd ..
MC33218AP ,VOICE SWITCHED SPEAKERPHONE WITH レPROCESSOR INTERFACEOrder this document by MC33218A/D * ** VOICE SWITCHED * * * SPEAKERPHONE WITH The Motorola MC33218 ..
MC33218DW ,Voice switched Speakerphone circuit Bipolar analog
MC33219ADW ,VOICE SWITCHED SPEAKERPHONE CIRCUITOrder this document by MC33219A/D * ** VOICE SWITCHED The Motorola MC33219A Voice Switched Speakerp ..
MC33219AP ,VOICE SWITCHED SPEAKERPHONE CIRCUITMAXIMUM RATINGSRating Symbol Min Max UnitSupply Voltage V –0.5 7.0 VdcCCAny Input V –0.4 V + 0.4 Vd ..
MC33232 ,Power Factor ControllerELECTRICAL CHARACTERISTICS (V = 12 V, for typical values T = −20°C ~ +85°C, unless otherwise noted) ..
MC74HC32AN ,Quad 2-Input OR GateMAXIMUM RATINGS*ÎÎÎSymbol Parameter Value UnitThis device contains protectionÎÎÎÎÎÎcircuitry to gua ..
MC74HC354N ,8-Input Data Selector/Multiplexer With Data and Address Latches and 3-State Outputs**SEMICONDUCTOR TECHNICAL DATA**"! **!* **!*"*!*#** **!* **!* J SUFFIX* * **! CERAMIC PACKAGE20C ..
MC74HC365 ,Hex 3-State Noninverting Buffer with Common EnablesELECTRICAL CHARACTERISTICS Î (Voltages Referenced to GND)ÎÎ Guaranteed LimitÎÎÎV V – 55 toÎÎÎÎÎÎC C ..
MC74HC365N ,Hex 3-State Noninverting Buffer with Common EnablesMAXIMUM RATINGS*ÎÎÎSymbol Parameter Value UnitThis device contains protectionÎÎÎÎÎÎcircuitry to gua ..
MC74HC366N ,Hex 3-State Inverting Buffer with Common EnablesMAXIMUM RATINGS*ÎÎÎSymbol Parameter Value UnitThis device contains protectionÎÎÎÎÎÎcircuitry to gua ..
MC74HC366N ,Hex 3-State Inverting Buffer with Common EnablesELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)ÎÎÎÎÎÎGuaranteed LimitV VÎÎ – 55 toÎÎÎÎC CC ..
MC33218ADW-MC33218AP
VOICE SWITCHED SPEAKERPHONE WITH レPROCESSOR INTERFACE
Order this document by MC33218A/D
ORDERING INFORMATION - -
The Motorola MC33218A Voice Switched Speakerphone Circuit
incorporates the necessary amplifiers, attenuators, level detectors, and
control algorithm to form the heart of a high quality hands–free
speakerphone system. Included are a microphone amplifier with mute,
transmit and receive attenuators, a background monitoring system for both
the transmit and receive paths, and level detectors for each path. An AGC
system reduces the receive gain on long lines where loop current and power
are in short supply. A dial tone detector prevents fading of dial tone. A Chip
Disable pin permits conserving power when the circuit is not in use.
Additionally, the MC33218A has a serial data port which permits
microprocessor control of the receive volume level, microphone mute,
attenuator range, and selection of transmit, receive, idle or normal modes.
The data port can be operated at up to 1.0 MHz.
The MC33218A can be operated from a power supply, or from the
telephone line, requiring typically 4.6 mA. It can be used in conjunction with a
variety of speech networks. Applications include not only speakerphones,
but intercoms and other voice switched devices. Supply Voltage Range: 2.7 to 6.5 V Attenuator Range: 53 or 27 dB (Selectable) 2 Point Sensing with Background Noise Monitor in Each Path Microprocessor Port for Control of:
Volume Control (40 dB Range over 16 Levels)
Mute Microphone Amplifier
Force to Receive, Transmit, or Idle Modes
Attenuator Range Selection (27 or 53 dB) Chip Disable Pin Powers Down the Entire IC 24 Pin Narrow Body (300 mil) DIP and 24 Pin SOIC
