MC34018P Voice Switched Speakerphone Circuit
MC34018P
$5.50
| QTY | Price |
|---|---|
| 1 | $5.50 |
Description
MC34018P - Incorporates necessary amplifiers, attenuators, and control functions to produce a high quality hands-free speakerphone system. Included are a microphone amplifier, a power audio amplifier for the speaker, transmit and receive attenuators, a monitoring system for background sound level, and an attenuation control system which responds to the relative transmit and receive levels as well as the background level. Also included are all necessary regulated voltages for both internal and external circuitry, allowing line-powered operation (no additional power supplies required). A Chip Select pin allows the chip to be powered down when not in use. A volume control function may be implemented with an external potentiometer.
Applications include speaker-phones for household and business use, intercom systems, automotive telephones, and others.
Features
- All necessary level detection and attenuation controls for a hands-free telephone in a single integrated circuit
- Background noise level monitoring with along time constant
- Wide operating dynamic range through signal compression
- On-chip supply and reference voltage regulation
- Typical 100 mW output power (into 25 Ohms) with peak limiting to minimise distortion
- Chip Select pin for active/standby operation
- Linear Volume Control Function
Specifications
Operating Temperature
-20°C ~ 60°C
Package
DIP
Number of Terminals
28
Terminal Finish
Tin/Lead
Dimensions
Length (mm)
36.83
Width (mm)
15.24
Terminal Pitch (mm)
2.54
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All prices are in Australian Dollars and include GST. GST will be removed from your order if you are ordering from outside Australia.
Products may differ from pictured.
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