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DS21448
3.3V E1/T1/J1 Quad Line Interface
3.3V E1/T1/J1 Quad Line Interface Unit for Short-Haul and Long-Haul Applications
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Status
Active: In Production.
Description
The DS21448 is a quad-port E1 or T1 line interface
unit (LIU) for short-haul and long-haul applications. It
incorporates four independent transmitters and four
independent receivers in a single 144-pin PBGA or
128-pin LQFP package. The transmit drivers
generate the necessary G.703 E1 waveshapes in
75Ω or 120Ω applications and the DSX-1 or CSU line
build-outs of 0dB, -7.5dB, -15dB, and -22.5dB for T1
applications.
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Data Sheet
Errata DS21448 21448A1.pdf
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An evaluation kit is available: DS21448DK
Key Features
- Four Complete E1, T1, or J1 LIUs
- Supports Long- and Short-Haul Trunks
- Internal Software-Selectable Receive-Side Termination for 75Ω/100Ω/120Ω
- 3.3V Power Supply
- 32-Bit or 128-Bit Crystal-Less Jitter Attenuator Requires Only a 2.048MHz Master Clock for E1 and T1, with the 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
- Muxed and Nonmuxed 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
- 50mARMSTransmit Current Limiter
- JTAG Boundary Scan Test Port per IEEE 1149.1
- Meets Latest E1 and T1 Specifications Including ANSI.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, TBR12, TBR13, and CTR4
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Applications/Uses
- Central-Office Switches and PBX Interfaces
- Integrated Multiservice Access Platforms
- T1/E1 Cross-Connects, Multiplexers, and Channel Banks
- T1/E1 LAN/WAN Routers
- Wireless Base Stations
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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 |
| DS21448 |
T1/E1/J1 |
LIU |
4 |
3.3 |
Yes |
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289 |
$25.29 @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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| DS21448
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Active |
TEPBGA;144 pin;289 mm²
Outline Drawing:21-0309 (PDF)
Land Pattern: 90-0268 (PDF)
Use pkgcode/variation: V144T-1*
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0°C to +70°C
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See data sheet
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| DS21448G+
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Active |
TEPBGA;144 pin;289 mm²
Outline Drawing:21-0309 (PDF)
Land Pattern: 90-0268 (PDF)
Use pkgcode/variation: V144T+1*
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-40°C to +85°C
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See data sheet
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| DS21448GN+
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Active |
TEPBGA;144 pin;289 mm²
Outline Drawing:21-0309 (PDF)
Land Pattern: 90-0268 (PDF)
Use pkgcode/variation: V144T+1*
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-40°C to +85°C
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See data sheet
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| DS21448L
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Active |
LQFP;128 pin;359.6 mm²
Outline Drawing:21-0086 (PDF)
Land Pattern: 90-0143 (PDF)
Use pkgcode/variation: C128L-3*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS21448L+
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Active |
LQFP;128 pin;359.6 mm²
Outline Drawing:21-0086 (PDF)
Land Pattern: 90-0143 (PDF)
Use pkgcode/variation: C128L+3*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS21448LN
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Active |
LQFP;128 pin;359.6 mm²
Outline Drawing:21-0086 (PDF)
Land Pattern: 90-0143 (PDF)
Use pkgcode/variation: C128L-3*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS21448LN+
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Active |
LQFP;128 pin;359.6 mm²
Outline Drawing:21-0086 (PDF)
Land Pattern: 90-0143 (PDF)
Use pkgcode/variation: C128L+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS21448N
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Active |
TEPBGA;144 pin;289 mm²
Outline Drawing:21-0309 (PDF)
Land Pattern: 90-0268 (PDF)
Use pkgcode/variation: V144T-1*
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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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Evaluation Kits
| DS21448DK |
3.3V E1/T1/J1 Line Interface Design Kit Daughter Card |
Products with Similar Part Numbers
| DS21448DK |
3.3V E1/T1/J1 Line Interface Design Kit Daughter Card |
More Information
Didn't Find What You Need?
Information Index
Document Ref.: xxx
Rev 3;
2006-01-23
This page last modified: 2009-10-13
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