19-5856; Rev 4; 5/11
DS26514
4-Port T1/E1/J1 Transceiver
______________ General Description
_______________________ Features
♦
♦
♦
♦
Four Complete T1, E1, or J1 Long-Haul/
Short-Haul Transceivers (LIU Plus Framer)
The DS26514 is a 4-port framer and line interface
unit (LIU) combination for T1, E1, J1 applications.
Each port is independently configurable, supporting
both long-haul and short-haul lines. The DS26514
single-chip transceiver (SCT) is software and pinout
compatible with the 8-port DS26518. It is nearly
software compatible with the DS26528 and its
derivatives.
Independent T1, E1, or J1 Selections for Each
Transceiver
Fully Internal Impedance Match, No External
Resistor
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
Channel Service Units (CSUs)
Data Service Units (DSUs)
Muxes
Switches
Channel Banks
♦
♦
Hitless Protection Switching
Crystal-Less Jitter Attenuators 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
T1/E1 Test Equipment
♦
♦
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
______________ Functional Diagram
DS26514
T1/E1/J1
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
NETWORK
T1/J1/E1
Transceiver
BACKPLANE
♦
♦
Transmit Open- and Short-Circuit Detection
x4
TDM
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
______________Ordering Information
♦
♦
♦
Alarm Detection and Insertion
T1 Framing Formats of D4, SLC-96, and ESF
J1 Support
PART
TEMP RANGE PIN-PACKAGE
DS26514GN
DS26514GN+
256 TE-CSBGA
256 TE-CSBGA
-40°C to +85°C
-40°C to +85°C
♦
♦
E1 G.704 and CRC-4 Multiframe
T1-to-E1 Conversion
+Denotes a lead(Pb)-free/RoHS compliant package.
Features continued in Section 2.
Maxim Integrated Products
1
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, go to: www.maxim-ic.com/errata. For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.