MC34118 - UTC

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

MC34118
Manufacturer

UTC
ChipWorker Part#

CW181925658
Package

SDIP-28
Description

IC VOICE SWITCH SPKPHONE 28-SOIC
Documentation

Datasheet

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MC34118 Specifications

Attribute	Attribute Value

Part Number	MC34118
Manufacturer	UTC
ChipWorker Part#	CW181925658
Documentation	Datasheet
Case/Package	SDIP-28
Supply Voltage	3.5V ~ 6.5V
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RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

DESCRIPTION
As a voice switched speaker-phone integrated circuit, the UTC MC34118 includes the necessary amplifiers, attenuators, level detectors and control algorithm. To form the UTC MC34118’s internal circuit, there is an internal microphone amplifier with adjustable gain and mute control, internal
transmit and Receive attenuators (operate in a complementary manner), level detectors at both input and output of both attenuators,and background noise monitors for both the transmit and receive channels. The dial tone can be pretended from being attenuated by the receive background noise monitor circuit by a dial tone detector. There are also two line driver amplifiers which can be used to form a hybrid network in conjunction with an external coupling transformer. A high-pass filter can be used for otherfiltering functions, and especially to filter out 60Hz noise in the receive channel. The UTC MC34118 which requiring typically 5mA may be operated from a power supply, orit can be powered from the telephone line.
FEATURES
* Attenuator gain range: 52dB (between Transmit and Receive)
* For line-powered applications : 3~6.5V low voltage operation
* For improved sensitivity :4-point signal sensing
* For Transmit and Receive paths: background noise monitors
* External resistors set microphone amplifier gain
* Mute function included
* Chip disable: active or standby operation
* During dial tone presence: dial tone detector to inhibit receive idle mode

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