Maxim DS21Q55 specifications Features, Applications, Ordering Information, Description

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DS21Q55

DS21Q55 Quad T1/E1/J1 Transceiver

FEATURES:

Complete T1 (DS1)/ISDN–PRI/J1 transceiver functionality

§Complete E1 (CEPT) PCM-30/ISDN-PRI transceiver functionality

§Short- and long-haul line interface for clock/data recovery and wave shaping

§CMI coder/decoder

§Crystal- less jitter attenuator

§Dual HDLC controllers

§On-chip programmable BERT generator and detector

§Internal software-selectable receive and transmit side termination resistors

§Dual two- frame elastic-store slip buffers to interface backplanes up to 16.384MHz

§16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz clock output synthesized to recovered network clock

§Programmable output clocks for fractional T1, E1, H0, and H12 applications

§Interleaving PCM bus operation

§8-bit parallel control port, multiplexed or nonmultiplexed, Intel or Motorola

§IEEE 1149.1 JTAG-boundary scan

§ 3.3V supply with 5V tolerant I/O § Signaling System 7 (SS7) support

APPLICATIONS:

§Routers

§Channel Service Units (CSUs)

§Data Service Units (DSUs)

§Muxes

§Switches

§Channel Banks

§T1/E1 Test Equipment

§DSL Add/Drop Multiplexers

ORDERING INFORMATION

DS21Q55 27mm BGA (0°C to +70°C) DS21Q55N 27mm BGA (-40°C to +85°C)

1. DESCRIPTION

The DS21Q55 is a quad MCM device featuring independent transceivers that can be software configured for T1, E1, or J1 operation. Each is composed of a line interface unit (LIU), framer, HDLC controllers, and a TDM backplane interface, and is controlled via an 8-bit parallel port configured for Intel or Motorola bus operations. The DS21Q55 is software compatible with the DS2155 single transceiver. It is pin compatible with the DS21Qx5y family of products.

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Note: This Product Preview contains preliminary information and is subject to change without notice. Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, visit: http://dbserv.maxim-ic.com/errata.cfm.

Please contact telecom.support@dalsemi.com or search http://www.maxim-ic.com for updated

information.