SPEECH NETWORK WITH DIALER INTERFACE 16-DIP-300A KA8501A telephon
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KA8501A
SPEECH NETWORK WITH DIALER INTERFACE
16-DIP-300A KA8501A telephone speech network integrated circuit which includes transmit amp, receive amp, DTMF amp, voltage regulator, line equalizer, voltage comparator. handles voice signal, performing wires interface changing gain both sending receiving amplifiers compensate line current. KA8501A work fixed gain mode.
FEATURES
Adjusts sending receiving attenuation length Regulated voltage dialer Linear interface DTMF Suitable ceramic transducers Mute function
ORDERING INFORMATION
Device KA8501A Package 16-DIP-300A Operating Temperature 45°C 70°C
CONFIGURATION
MIC1
KA8501A
MIC2
MUTING
BIAS ADJ.
RXO2
REGULATOR
RXO1
REGULATOR
LINE CURRENT
ZBAL SWITCH
Fig.
KA8501A
SPEECH NETWORK WITH DIALER INTERFACE
ABSOLUTE MAXIMUM RATINGS
Characteristic Line Voltage (3msec max) Forward Line Current Reverse Line Current Power Dissipation 70°C) Operating Temperature Storage Temperature Symbol Value -150 Unit
ELECTRICAL CHARACTERISTICS 25°C)
Characteristic Symbol Test Conditions 12mA Line Voltage Common Mode Rejection Ratio Line Matching Impedance CMRR 25°C 20mA 80mA 1KHz, 80mA 0.3V, 80mA 1KHz 25°C 1KHz 52mA Gain Flatness Distortion Noise Side Tone Input Impedance Loss Operation (TX) (TX) (ST) (MIC) (LOSS) 2mV, fref 1KHz 80mA 1KHz 80mA 40mA 25°C, 1KHz 52mA 2mV, 80mA 25°C 0.3V 1KHz 52mA 25mA 52mA 25mA 52mA 1.3V 25mA 52mA 12.2 dBmp Unit
Gain
(TX)
Gain
(RX)
KA8501A
SPEECH NETWORK WITH DIALER INTERFACE
(Continued) Test Conditions 0.3V, fref 1KHz 1.6V 1.9V 1.8V 2.1V 80mA 80mA 0.3VDD Unit
ELECTRICAL CHARACTERISTICS
Characteristic Gain Flatness
Symbol (RX)
80mA 1KHz 12mA 50mA
Distortion
THDRX
Noise Output Impedance Supply Voltage Supply Current Stand Operation Amplifier Gain Input Voltage Level (pin Input Impedance (pin Distortion Starting Delay Time Muting Threshold Voltage (pin Stand Operation
(RX) (RX) (MF) (MF) (MF) (MF) (MF) (MF) (ST) VTH(MUTE) (MUTE) (MUTE)
80mA 50mV, 40mA 80mA 80mA 80mA 1KHz 80mV 80mV 80mV 110mV 80mA 80mA
Muting Current
SPEECH NETWORK WITH DIALER INTERFACE
1.8K
Output
7.5K
SPEAKER
1.8K
Reg.
10uF
Dialer
MUTE Signal
APPLICATION CIRCUIT
KA8501A
Ring
3.6K
Fig.
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