MT8889CE1

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Function:	DTMF Transceiver
Interface:	--
Number of Circuits:	1
Voltage - Supply:	4.75 V ~ 5.25 V
Current - Supply:	7mA
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	20-DIP (0.300", 7.62mm)
Supplier Device Package:	20-PDIP
Includes:	--

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MT8889CE1 is a highly integrated narrowband Voice over IP (VoIP) processor that is mainly used in consumer line voice applications. It is a complete solution for low cost consumer telephony products and provides an enhanced peripheral set including an MCU, 10-bit audio DAC, 10-bit audio ADC, headphone amplifier, pre-amplifier, ring generator, and caller ID in one package. It is also one of the essential components of the VoIP consumer gateway market that enables cost-effective VoIP gateways for consumers and small businesses.

• Overview

MT8889CE1 is a low power VoIP processor designed for consumer analogue telephony applications. It targets cost-sensitive consumer markets and provides an efficient, feature-rich, and low cost telephone access solution. The product combines a powerful RISC processor core with a complete set of essential telephony functions such as codec, handset and line-side analog front-end, and an integrated high speed SERDES transceiver.The integrated processor core is based on an Embedded ARM® Cortex®-M3 processor operating at up to 28MHZ that provides a powerful, low cost solution. The MT8889CE1 also features an integrated 10-bit audio DAC and 10-bit audio ADC that supports linear PCM and µ-law/A-law formats. The integrated headphone amplifier and pre-amplifier are ideal for support a variety of headset and handsets including corded, cordless, and VoIP compatible phones. The MT8889CE1 also provides a variety of integrated voice services including DTMF generation and detection, caller ID, and line signaling functions for ring, hang-up, polarity reversal, and ground-start. Furthermore, the MT8889CE1 supports a wide range of advanced voice functions including full-duplex acoustic echo cancellation, comfort tone generation and acoustic feedback cancellation, and low-cost electromagnetic interfacing (EMI) cancellation.

• Application Field

The MT8889CE1 is designed for consumer telephony applications, offering a cost-effective solution for these devices. This low power and low cost VoIP processor is ideal for handset and VoIP gateway products that require advanced voice features and enhanced analog front-end.The MT8889CE1 can be used in various consumer applications including home gateways, cordless phones and handsets, VoIP gateways, enterprise class VoIP phone systems, consumer accessories, and an ever-growing range of consumer VoIP services. The device also features an integrated line framing and terminating architecture that allows for support of various telephony standards such as ISDN, Q.931, and the E.150.

• Working Principle

The MT8889CE1 is based on an ARM Cortex-M3 processor operating at 28MHz and provides a powerful, low cost solution for consumer VoIP applications. It integrates 10-bit audio ADC and 10-bit audio DAC and supports both linear PCM and µ-law/A-law formats. The processor also supports a wide range of telephony services such as DTMF generation and detection, caller ID, line signaling functions, acoustic echo cancellation, comfort tone generation, acoustic feedback cancellation, and low-cost EMI cancellation.The device also integrates a SERDES transceiver with support for various telco standards such as ISDN, Q.931, and the E.150. The integrated lineside external interfaces support two-wire and four-wire voice ports and line operating voltage to facilitate connection to a variety of handset and line-side interfaces. The processor core operates with an integrated memory management unit (MMU), stacks, and complex interrupt handling hardware. The processor includes a UART interface that supports two-stage command processing to allow remote access and control of voice processing functions. Furthermore, the integrated power management unit works in conjunction with the power supply controller to ensure proper and efficient power for the device. The device also supports a wide range of peripheral devices including D/A converter and microcontroller as well as digital audio codec and Ethernet/WLAN controllers.

• Summary

The MT8889CE1 is a comprehensive and robust VoIP processor designed for low cost consumer telephony applications. It incorporates a full set of essential telephony functions and peripheral set in one package. It offers an efficient, feature-rich, and low cost solution for consumer line voice applications. The processor is suitable for handsets and VoIP gateways, allowing for advanced voice features and enhanced analog front-end. The device also supports a variety of telco standards and features an integrated lineside external interface and line operating voltage. The integrated ARM Cortex-M3 processor core, audio ADCs and DACs, headphone amplifier and pre-amplifier, and ring generator enable cost-effective VoIP gateways for consumers and small businesses.

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