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DS2148, DS21Q48
5V E1/T1/J1 Line Interface
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Status
| Part Number |
Status |
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DS2148
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Active: In Production. |
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DS21Q48
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This product is No Longer Available. |
Description
The DS2148 is a complete selectable E1 or T1 Line Interface Unit (LIU) for short- and long-haul
applications. Throughout the data sheet, J1 is represented wherever T1 exists. Receive sensitivity adjusts
automatically to the incoming signal and can be programmed for 0dB to 12dB or 0dB to 43dB for E1
applications and 0dB to 30dB or 0dB to 36dB for T1 applications. The device can generate the necessary
G.703 E1 waveshapes in 75Ω or 120Ω applications and DSX-1 line build outs or CSU line build outs of 0dB, -7.5dB, -15dB, and -22.5dB for T1 applications. The crystal-less onboard jitter attenuator requires only a 2.048MHz MCLK for both E1 and T1 applications (with the option of using a 1.544MHz MCLK in T1 applications). The jitter attenuator FIFO is selectable to either 32 bits or 128 bits in depth and can
be placed in either the transmit or receive data paths. An X 2.048MHz output clock synthesized to RCLK
is available for use as a backplane system clock (where n = 1, 2, 4, or 8). The DS2148 has diagnostic
capabilities such as loopbacks and PRBS pattern generation/detection. 16-bit loop-up and loop-down
codes can be generated and detected. The device can be controlled via an 8-bit parallel muxed or
nonmuxed port, serial port or used in hardware mode. The device fully meets all of the latest E1 and T1
specifications including ANSI T1.403-1999, ANSI T1.408, AT&T TR 62411, ITU G.703, G.704, G.706,
G.736, G.775, G.823, I.431, O.151, O.161, ETSI ETS 300 166, JTG.703, JTI.431, JJ-20.1, TBR12,
TBR13, and CTR4.
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Data Sheet
Errata DS21Q48 2148_Q48C1.pdfErrata DS2148 2148_Q48C1.pdfErrata DS2148 2148_Q48A2.pdfErrata DS21Q48 2148_Q48A2.pdf
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Key Features
- Complete E1, T1, or J1 line interface unit
(LIU)
- Supports both long- and short-haul trunks
- Internal software-selectable receive-side
termination for 75Ω/100Ω/120Ω
- 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
- 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
- Multiplexed and nonmultiplexed parallel bus
supports Intel or Motorola
- 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
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Key Specifications:
| T/E Carrier & Packetized Products |
| Part Number |
Transmission Standard |
Functions |
Channels |
VSUPPLY
(V) |
EV Kit |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max w/pins |
See Notes |
| DS2148 |
T1/E1/J1 |
LIU |
1 |
5 |
Yes |
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49 |
$7.75 @1k |
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See All T/E Carrier & Packetized Products (100)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Block Diagram
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS2148DK
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Active |
N/A;
Land Pattern: Not Available
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0°C to +70°C
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See data sheet
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| DS2148G
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Active |
CSBGA;49 pin;49 mm²
Outline Drawing:21-0356 (PDF)
Land Pattern: 90-0318 (PDF)
Use pkgcode/variation: X49-1*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS2148G+
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Active |
CSBGA;49 pin;49 mm²
Outline Drawing:21-0356 (PDF)
Land Pattern: 90-0318 (PDF)
Use pkgcode/variation: X49+1*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2148GN
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Active |
CSBGA;49 pin;49 mm²
Outline Drawing:21-0356 (PDF)
Land Pattern: 90-0318 (PDF)
Use pkgcode/variation: X49-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS2148GN+
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Active |
CSBGA;49 pin;49 mm²
Outline Drawing:21-0356 (PDF)
Land Pattern: 90-0318 (PDF)
Use pkgcode/variation: X49+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2148T
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Active |
TQFP;44 pin;148.8 mm²
Outline Drawing:21-0293 (PDF)
Land Pattern: 90-0316 (PDF)
Use pkgcode/variation: C44-2*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS2148T+
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Active |
TQFP;44 pin;148.8 mm²
Outline Drawing:21-0293 (PDF)
Land Pattern: 90-0316 (PDF)
Use pkgcode/variation: C44+2*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2148TN
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Active |
TQFP;44 pin;148.8 mm²
Outline Drawing:21-0293 (PDF)
Land Pattern: 90-0316 (PDF)
Use pkgcode/variation: C44-2*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS2148TN+
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Active |
TQFP;44 pin;148.8 mm²
Outline Drawing:21-0293 (PDF)
Land Pattern: 90-0316 (PDF)
Use pkgcode/variation: C44+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS21Q48
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N/A |
No Longer Available |
CSBGA;144 pin;289 mm²
Outline Drawing:21-0258 (PDF)
Land Pattern: 90-0257 (PDF)
Use pkgcode/variation: V144-M6*
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0°C to +70°C
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See data sheet
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS21Q48N
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N/A |
No Longer Available |
CSBGA;144 pin;289 mm²
Outline Drawing:21-0258 (PDF)
Land Pattern: 90-0257 (PDF)
Use pkgcode/variation: V144-M6*
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-40°C to +85°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Rev 4;
2006-01-23
This page last modified: 2009-10-23
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