DS26528
Octal T1/E1/J1 Transceiver
www.maxim-ic.com
GENERAL DESCRIPTION
FEATURES
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Eight Complete T1, E1, or J1 Long-Haul/Short-
Haul Transceivers (LIU plus Framer)
The DS26528 is a single-chip 8-port 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.
Independent T1, E1, or J1 Selections for Each
Transceiver
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
APPLICATIONS
Routers
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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
Channel Service Units (CSUs)
Data Service Units (DSUs)
Muxes
Switches
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
Channel Banks
T1/E1 Test Equipment
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
FUNCTIONAL DIAGRAM
DS26528
T1/E1/J1
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Transmit Open- and Short-Circuit Detection
NETWORK
LIU LOS in Accordance with G.775, ETS 300
233, and T1.231
T1/J1/E1
Transceiver
BACKPLANE
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Transmit Synchronizer
x8
TDM
Flexible Signaling Extraction and Insertion
Using Either the System Interface or
Microprocessor Port
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Alarm Detection and Insertion
T1 Framing Formats of D4, SLC-96, and ESF
J1 Support
ORDERING INFORMATION
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
256 TE-CSBGA
256 TE-CSBGA
256 TE-CSBGA
256 TE-CSBGA
E1 G.704 and CRC-4 Multiframe
T1-to-E1 Conversion
DS26528G
DS26528G+
DS26528GN
DS26528GN+
Features Continued in Section 2.
+ Denotes lead-free/RoHS compliant device.
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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REV: 081707