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KA8503

Samsung Semiconductor
Part Number KA8503
Manufacturer Samsung Semiconductor
Description Low Voltage Speech Network
Published Oct 29, 2008
Detailed Description KA8503 LOW VOLTAGE SPEECH NETWORK INTRODUCTION The KA8503 is a telephone low voltage speech network which includes mic...
Datasheet PDF File KA8503 PDF File

KA8503
KA8503

Overview
KA8503 LOW VOLTAGE SPEECH NETWORK INTRODUCTION The KA8503 is a telephone low voltage speech network which includes mic amp.
transmit amp, side-tone amp, receive amp.
It handles the voice signal performing the 2/4 wire interface and changing the gain on both sending and receiving amplifiers to compensate for line attenuation by sensing the line length through the line current.
Application dependent parameters such as amplitude of each amp, sidetone level line balance, and frequency response are controlled by external components.
Each gain can be controlled by external component exchange.
The receiver output driving capability is adjustable.
18-DIP-300A www.
DataSheet4U.
com FEATURES • Adjust Sending and Receiving Attenuation Length • Mute Function • Side Tone Balance Network Constitution • Low Voltage Operating • AC Impedance Matching • Uses in Inexpensive Components (5 Capacitors & 10 Resistors) • Uses a minimum of external components ORDERING INFORMATION Device KA8503 Package 18-DIP-300A Operating Temperature - 40°C ~ + 70°C BLOCK DIAGRAM VDD MUTE V+ ST3 STO RXI 4 5 1 9 10 15 MIC 1 MIC 2 12 13 17 18 RXO2 RXO3 6 11 3 2 T XO 8 ST2 7 ST1 14 16 VRXO1 GR MICO TXI Fig.
1 KA8503 LOW VOLTAGE SPEECH NETWORK PIN CONFIGURATION V+ 1 2 3 4 5 6 7 8 9 KA8503 18 17 16 15 14 13 12 11 10 RXO3 TXO RXO2 TXI RXO1 VDD RXI www.
DataSheet4U.
com MUTE V- GR MIC2 ST1 MIC1 ST2 MIC0 ST3 ST0 Fig.
2 PIN DESCRIPTION Pin No 1 2 3 4 5 6 7, 8, 9 10 11 12, 13 14 15 16 17, 18 Symbol V+ TXO TXI VDD MUTE GR ST1, ST2, ST3 STO MIC0 MIC1, MIC2 VRXI RXO1 RXO2, ROX3 Seperate amplifier output.
Microphone amplifier output.
Microphone amplifier inputs.
Input impedance is 1.
7 KΩ Negative power line.
Receive amplifier input.
Receive amplifier output.
Receive amplifier output.
Output impedance is 3Ω (Typ) ± 20% Description Postive power line and transmit amplifier output.
Transmit amplifier output.
The resistor which is connected this pin to V - sets DC resistance of...


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