DS2148/DS21Q48
5V E1/T1/J1 Line Interface Unit
www.maxim-ic.com
PIN CONFIGURATION
FEATURES
ꢀ Complete E1, T1, or J1 Line Interface Unit
(LIU)
TOP VIEW
44
ꢀ Supports Both Long- and Short-Haul Trunks
ꢀ Internal Software-Selectable Receive-Side
Termination for 75Ω/100Ω/120Ω
1
DS2148
ꢀ 5V Power Supply
ꢀ 32-Bit or 128-Bit Crystal-Less Jitter
Attenuator Requires Only a 2.048MHz
Master Clock for Both E1 and T1 with
Option to Use 1.544MHz for T1
ꢀ Generates the Appropriate Line Build-Outs,
With and Without Return Loss, for E1 and
DSX-1 and CSU Line Build-Outs for T1
ꢀ AMI, HDB3, and B8ZS, Encoding/Decoding
ꢀ 16.384MHz, 8.192MHz, 4.096MHz, or
2.048MHz Clock Output Synthesized to
Recovered Clock
44 TQFP
DS2148
ꢀ Programmable Monitor Mode for Receiver
ꢀ Loopbacks and PRBS Pattern Generation/
Detection with Output for Received Errors
ꢀ Generates/Detects In-Band Loop Codes, 1 to
16 Bits including CSU Loop Codes
ꢀ 8-Bit Parallel or Serial Interface with
Optional Hardware Mode
49 CSBGA
(7mm x 7mm)
See Section 8
for 144-pin CSBGA pinout.
ORDERING INFORMATION
ꢀ Multiplexed and Nonmultiplexed Parallel
Bus Supports Intel or Motorola
TEMP
PIN-
PART
CHANNEL
RANGE
PACKAGE
DS2148TN
DS2148TN+
DS2148T
DS2148T+
DS2148GN
DS2148GN
DS2148G
DS2148G+
DS21Q48N
DS21Q48
Single
Single
Single
Single
Single
Single
Single
Single
Four
44 TQFP
44 TQFP
44 TQFP
44 TQFP
49 CSBGA
49 CSBGA
49 CSBGA
49 CSBGA
144 CSBGA
144 CSBGA
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
ꢀ Detects/Generates Blue (AIS) Alarms
ꢀ NRZ/Bipolar Interface for Tx/Rx Data I/O
ꢀ Transmit Open-Circuit Detection
ꢀ Receive Carrier Loss (RCL) Indication
(G.775)
ꢀ High-Z State for TTIP and TRING
ꢀ 50mA (RMS) Current Limiter
Four
+ Denotes lead-free/RoHS-compliant package.
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: 011206