Datasheet > DS21Q50N

DS21Q50N

更新时间： 2024-10-27 23:48:51

品牌	Logo	应用领域
其他 - ETC		电信
页数	文件大小	规格书
99页	321K
描述
Telecommunication IC

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数据手册

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DS21Q50N 数据手册

DS21Q50

Quad E1 Transceiver

www.dalsemi.com

PRELIMINARY

FEATURES

§ 4 complete E1 (CEPT) PCM-30/ISDN-PRI

transceivers

100-PIN

LQFP

§ Long and short haul line interfaces

§ 32-bit or 128-bit crystal-less jitter attenuator

§ Frames to FAS, CAS, CCS, and CRC4 formats

§ 4/8/16MHz clock synthesizer

§ Flexible system clock with automatic source

switching on loss of clock source

100

ORDERING INFORMATION

DS21Q50L:

100-pin 14mm LQFP (0⁰C to 70⁰C)

DS21Q50LN:

100-pin 14mm LQFP (-40⁰C to 85⁰C)

§ Two–frame elastic store slip buffer on the receive

side

§ Large counters for bipolar and code

violations, CRC4 code word errors, FAS

word errors, and E bits

§ 8 additional user configurable output pins.

§ 100-pin LQFP package (14mm)

§ Interleaving PCM bus operation up to 16.384MHz

§ Configurable parallel and serial port operation

§ Detects and generates remote and AIS alarms

§ Fully independent transmit and receive functionality

§ Four separate loopback functions

§ PRBS generation/detection/error counting

§ 3.3V low power CMOS

DESCRIPTION

The DS21Q50 E1 Quad Transceiver contains all of the necessary functions for connection to 4 E1 lines. The

onboard clock/data recovery circuitry coverts the AMI/HDB3 E1 waveforms to an NRZ serial stream. The

DS21Q50 automatically adjusts to E1 22AWG (0.6 mm) twisted–pair cables from 0 to over 2km in length. The

device can generate the necessary G.703 waveshapes for both 75 ohm coax and 120 ohm twisted pair cables.

The onboard jitter attenuators (selectable to either 32 bits or 128 bits) can be placed in either the transmit or

receive data paths. The framers locate the frame and multiframe boundaries and monitor the data streams for

alarms. The device contains a set of internal registers, which the user can access and control the operation of the

unit via the parallel control port or serial port. The device fully meets all of the latest E1 specifications including

ITU-T G.703, G.704, G.706, G.823, G.732, and I.431, ETS 300 011, 300 233, and 300 166, as well as

CTR12 and CTR4.

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