TP3057WM

Enhanced Serial Interface CODEC/Filter COMBO Family

General Description

The TP3054, TP3057 family consists of m-law and A-law

monolithic PCM CODEC/filters utilizing the A/D and D/A

conversion architecture shown inFigure 1, and a serial PCM

interface. The devices are fabricated using National's ad-

vanced double-poly CMOS process (microCMOS).

The encode portion of each device consists of an input gain

adjust amplifier, an active RC pre-filter which eliminates very

high frequency noise prior to entering a switched-capacitor

band-pass filter that rejects signals below 200 Hz and above

3400 Hz. Also included are auto-zero circuitry and a com-

panding coder which samples the filtered signal and en-

codes it in the companded m-law or A-law PCM format. The

decode portion of each device consists of an expanding

decoder, which reconstructs the analog signal from the

companded m-law or A-law code, a low-pass filter which

corrects for the sin x/x response of the decoder output and

rejects signals above 3400 Hz followed by a single-ended

power amplifier capable of driving low impedance loads.

The devices require two 1.536 MHz, 1.544 MHz or 2.048

MHz transmit and receive master clocks, which may be

asynchronous; transmit and receive bit clocks, which may

vary from 64 kHz to 2.048 MHz; and transmit and receive

frame sync pulses. The timing of the frame sync pulses and

PCM data is compatible with both industry standard formats

Features

 Complete CODEC and filtering system (COMBO)

including:

 Transmit high-pass and low-pass filtering

 Receive low-pass filter with sin x/x correction

 Active RC noise filters

 m-law or A-law compatible COder and DECoder

 Internal precision voltage reference

 Serial I/O interface

 Internal auto-zero circuitry

 m-law, 16-pinÐTP3054

 A-law, 16-pinÐTP3057

 Designed for D3/D4 and CCITT applications

 g5V operation

 Low operating powerÐtypically 50 mW

 Power-down standby modeÐtypically 3 mW

 Automatic power-down

 TTL or CMOS compatible digital interfaces

 Maximizes line interface card circuit density

 Dual-In-Line or surface mount packages

 See also AN-370, ``Techniques for Designing with

CODEC/Filter COMBO Circuits

由于客戶采購批量與樣品的價格不同，網(wǎng)上無法統(tǒng)一注明，請您把采購型號通過郵件或客服QQ：2850151585 發(fā)給我們，也可以撥打明佳達國內(nèi)銷售部電話：0755-83957301，由客服人員為您報價；有時元件廠商價格稍許變動，本公司未能及時調(diào)整，如您覺得售價稍高，請與我們說明并適當議價，感謝支持!

MJD is a corporation which engaged in agency electronic components. MJD Through seventeen years unrimitting efforts,  aspire to provide our customers with world-leading products and service. Now already became a one of the most famous electronic components distributor in China.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 PAYMENTS:

We support the following payment methods:

 1. Paypal

 2. Western Union 

 3. Bank Wire (TT)

 4. MoneyGram

Shipping:

1. MJD needs about 3 BUSINESS DAY to handle the order after received payment. after receiving your payment. Otherwise, we will state it in the invoice in advance.

2. MJD can Ship via your shipping account (DHL / FEDEX / UPS / TNT or others) as your instruction. Or Ship via our shipping account (We have a very good relationship with DHL and FEDEX with very special freight).

3. Regarding the declared value on the package for customs clearance, we are pleased to follow

your wishes, just feel free to inform us when ordering.

4. Any import fees or charges are the buyer's responsibility.

REFUNDS & RETURN:

We offer a warranty on all items that we sold. Item will be tested before ship,it will be in good condition,if there are some problems with the item,feel free to contact us.Please Email us to notify a defective item. Unless otherwise specified, this item comes with 30 days warranty from the shipment date.

You must contact us before returning any product. All returns must be made within 30 days from this shipment date.Return must be in new condition(the SAME CONDITION as it was sent to you)

Because of wholesale price is different from sample price, our website can not state.Please send your required part number via email to Sales@hkmjd.com or add our skype id mjdccm898 for online talking.As well as welcome you call us : 0755-83957301  We will send offer for you;  Sometimes manufacturer's price is unstable, so we don't adjust price in time. if you feel price is a little high for you, just feel free to contact us for consultation. Thank you for your support ！