DS21448 データシートの表示（PDF） - Maxim Integrated

部品番号

コンポーネント説明

一致するリスト

DS21448

3.3V E1/T1/J1 Quad Line Interface

Maxim Integrated 

DS21448

3.3V E1/T1/J1 Quad Line Interface

www.maxim-ic.com

GENERAL 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.

APPLICATIONS

Integrated Multiservice Access Platforms

T1/E1 Cross-Connects, Multiplexers, and Channel

Banks

Central-Office Switches and PBX Interfaces

T1/E1 LAN/WAN Routers

Wireless Base Stations

ORDERING INFORMATION

PART*

TEMP RANGE PIN-PACKAGE

DS21448

0°C to +70°C 144 TE-PBGA

DS21448+

0°C to +70°C 144 TE-PBGA

DS21448N

-40°C to +85°C 144 TE-PBGA

DS21448N+ -40°C to +85°C 144 TE-PBGA

DS21448L

0°C to +70°C 128 LQFP

DS21448L+

0°C to +70°C 128 LQFP

DS21448LN -40°C to +85°C 128 LQFP

DS21448LN+ -40°C to +85°C 128 LQFP

+ Denotes lead-free/RoHS-compliant package.

*All devices rated at 3.3V.

Pin Configurations appear in Section 11.

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

50mARMS Transmit 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

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.

1 of 60

REV: 011206

Share Link: