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ML7021

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ML7021 技术参数

FEDL7021-03

OKI Semiconductor

Issue Date: Jun. 1, 2005

ML7021

Echo Canceler

GENERAL DESCRIPTION

The ML7021 is an improved version of the MSM7602 with the reduced cancelable echo delay

time and additional 2100Hz tone detection function.

TheML7021isalow-powerCMOSdeviceforcancelingecho(inanacousticsystemortelephone

line) generated in a speech path.

Echo is canceled, in digital signal processing, by estimating the echo path and generating a

pseudo echo signal.

TheML7021makespossibleaqualityconversationbycontrollingthenoiselevelandpreventing

howling with howling detector, double talk detector, attenuation function, and a gain control

function. The devise also controls the low level noise with a center clipping function.

Further, the ML7021 I/O interface supports m-law PCM . The use of a single chip CODEC, such

as the MSM7566/7704 (3 V) or MSM7543/7533 (5 V), allows a simplified and efficient echo

canceler configuration.

FEATURES

• Tone disable function

• Cancelable echo delay time:

For a single chip: 8 ms (max.)

• Echo attenuation

• Clock frequency

: 30 dB (typ.)

: 19.2 MHz

External input and internal oscillator circuit are provided.

• Power supply voltage : 2.7 V to 5.5 V

• Package:

28-pin plastic SSOP (SSOP28-P-485-0.65-K) (Product name : ML7021MB)

12 3 4 5 6 7...24

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型号	品牌	描述	获取价格	数据表
ML7021MB	OKI	ISDN Echo Canceller, 1-Func, CMOS, PDSO28, 0.485 INCH, 0.65 MM PITCH, PLASTIC, SSOP-28	获取价格
ML7022	OKI	Single Rail Dual Channel PCM CODEC	获取价格
ML7022-01MB	OKI	Single Rail Dual Channel PCM CODEC	获取价格
ML7029	OKI	Multifunction ADPCM CODEC	获取价格
ML7029B	OKI	ADPCM Codec, PDSO30, 0.65 MM PITCH, PLASTIC, SSOP-30	获取价格
ML7033	OKI	Dual-Channel Line Card CODEC	获取价格