SPEECH NETWORK WITH DIALER INTERFACE 16-DIP-300A KA8504 telephone

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SPEECH NETWORK WITH DIALER INTERFACE 16-DIP-300A KA8504 telephone

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KA8504
SPEECH NETWORK WITH DIALER INTERFACE
16-DIP-300A KA8504 telephone speech network which includes Amp, DTMF Amp. gain controlled automatically sensing line current. circuit internally performs electronic switching between dialing speech mute signal.
FEATURES
line current operation Mute function DTMF signal interface Easy gain control
ORDERING INFORMATION
Device KA8504 Package 16-DIP-300A Operating Temperature 40°C 85°C
BLOCK DIAGRAM
INPUT
GAIN CONTROL
OUTPUT
GAIN CONTROLLER
MIC+
GAIN CONTROL
MIC-
MUTE
Fig.
KA8504
SPEECH NETWORK WITH DIALER INTERFACE
CONFIGURATION
BIAS MUTE
MICMIC+
Fig.
DESCRIPTION
Symbol BIAS MUTE Description Positive power line Output. Current input. Current output. line current large, this dissipates excess power (current) signal reference voltage terminal. DTMF input. When mute level, this become active. Mute input. When this 'H'level, speech circuit muted DTMF input enabled. voltage this part becomes reference voltage internal Amp. Negative power line. Output Amp. Negative feedback inverting input. Inverting input. Gain triggering point regulation. Receiver input. negative feedback input. Receiver out. Internal power supply pin. Power supplied from through resistor.
KA8504
SPEECH NETWORK WITH DIALER INTERFACE
ABSOLUTE MAXIMUM RATINGS
Characteristic Line Voltage Line Current Surge Line Current sec) Power Dissipation Operating Temperature Storage Temperature Symbol (SURGE) Value Unit
ELECTRICAL CHARACTERISTICS
25°C, 1KHz, unless otherwise noted) Characteristic Symbol Test Conditions 20mA Line Voltage 50mA 120mA 20mA Internal Operating Voltage 50mA 120mA Gain (TX) 20mA 120mA 20mA Dynamic Output Voltage (TX) 4.0% 120mA 4.0% Gain (RX) 20mA 120mA 20mA Dynamic Output Voltage (RX) 120mA Output Current DTMF Gain DTMF Input Impedance Mute High Voltage (RX) (MF) (MF) (MUTE) 120mA 20mA 120mA 50mA 120mA 10.5 35.0 32.0 -7.5 -13.5 20.5 17.5 11.5 37.0 34.0 -4.5 -1.5 22.5 19.5 12.5 39.0 36.0 Vp-p -1.5 -7.5 mVp-p 24.5 21.5 Unit
KA8504
1500pF 2.2K 100K 1.5K
APPLICATION CIRCUIT
6.2K 100K
KA8504
SPEECH NETWORK WITH DIALER INTERFACE
Fig.3
1.4V 22µF SPEAKER (IMPEDANCE
RING

SPEECH NETWORK WITH DIALER INTERFACE 16-DIP-300A KA8504 telephone

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