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DS26528

Octal T1/E1/J1 Transceiver

www.maxim-ic.com

GENERAL DESCRIPTION

The DS26528 is a single-chip 8-port framer and line

interface unit (LIU) combination for T1, E1, and J1

applications. Each port is independently configurable,

supporting both long-haul and short-haul lines.

FEATURES

摟

摟

摟

Eight Complete T1, E1, or J1 Long-Haul/Short-

Haul Transceivers (LIU plus Framer)

Independent T1, E1, or J1 Selections for Each

Transceiver

Internal Software-Selectable Transmit- and

Receive-Side Termination for 100W T1 Twisted

Pair, 110W J1 Twisted Pair, 120W E1 Twisted

Pair, and 75W E1 Coaxial Applications

Crystal-Less Jitter Attenuators can be Selected

for Transmit or Receive Path. The Jitter

Attenuator meets ETSI CTR 12/13, ITU G.736,

G.742, G.823, and AT&T PUB 62411.

External Master Clock can be Multiple of

2.048MHz or 1.544MHz for T1/J1 or E1

operation. This Clock is Internally Adapted for T1

or E1 Usage in the Host Mode.

Receive Signal Level Indication from -2.5dB to

-36dB in T1 Mode and -2.5dB to -44dB in E1

Mode in Approximate 2.5dB Increments

Transmit Open and Short Circuit Detection

LIU LOS in Accordance with G.775, ETSI

300233, and T1.231

Transmit Synchronizer

Flexible Signaling Extraction and Insertion Using

Either the System Interface or Microprocessor

Port

Alarm Detection and Insertion

T1 Framing Formats of D4, SLC-96, and ESF

J1 Support

E1 G.704 and CRC-4 Multiframe

T1 to E1 Conversion

APPLICATIONS

Routers

Channel Service Units (CSUs)

Data Service Units (DSUs)

Muxes

Switches

Channel Banks

T1/E1 Test Equipment

摟

摟

FUNCTIONAL DIAGRAM

T1/E1/J1

NETWORK

摟

摟

摟

摟

摟

摟

摟

摟

摟

摟

DS26528

T1/J1/E1

Transceiver

x8

BACKPLANE

TDM

Features continued in Section

2.

ORDERING INFORMATION

PART

DS26528

TEMP RANGE

-40擄C to +85擄C

PIN-PACKAGE

256 TE-CSBGA

Note:

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, click here:

www.maxim-ic.com/errata.

1 of 269

REV: 012405

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