DS26521 Datasheet, PDF (1/258 Pages) Maxim Integrated Products – Single T1/E1/J1 Transceiver

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GENERAL DESCRIPTION
The DS26521 is a single-channel framer and line
interface unit (LIU) combination for T1, E1, and J1
applications. Each channel is independently
configurable, supporting both long-haul and short-haul
lines.
APPLICATIONS
Routers
Channel Service Units (CSUs)
Data Service Units (DSUs)
Muxes
Switches
Channel Banks
T1/E1 Test Equipment
FUNCTIONAL DIAGRAM
T1/E1/J1
NETWORK
DS26521
T1/J1/E1
Transceiver
BACKPLANE
TDM
ORDERING INFORMATION
PART
DS26521LN
DS26521LN+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
64 LQFP
64 LQFP
+ Denotes lead-free/RoHS compliant device.
DS26521
Single T1/E1/J1 Transceiver
FEATURES
Complete T1, E1, or J1 Long-Haul/Short-Haul
Transceiver (LIU plus Framer)
Internal Software-Selectable Transmit- and
Receive-Side Termination for 100Ω T1 Twisted
Pair, 110Ω J1 Twisted Pair, 120Ω E1 Twisted
Pair, and 75Ω E1 Coaxial Applications
Crystal-Less Jitter Attenuator can be Selected
for Transmit or Receive Path; Jitter Attenuator
Meets ETS CTR 12/13, ITU-T 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, ETS 300
233, 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
Controlled by 8-Bit Parallel Port Interface or
Serial Peripheral Interface (SPI)
Features Continued in Section 2.
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.
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