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DS26324 3.3V, 16-Channel, E1/T1/J1 Short-Haul Line Interface Unit
www.maxim-ic.com
GENERAL DESCRIPTION
The DS26324 is a 16-channel short-haul line interface unit (LIU) that supports E1/T1/J1 from a single 3.3V power supply. A wide variety of applications are supported through internal impedance matching. A single bill of material can support E1/T1/J1 that requires no external termination. Redundancy is supported through nonintrusive monitoring, optimal high-impedance modes and configurable 1:1 or 1+1 backup enhancements. An on-chip synthesizer generates the E1/T1/J1 clock rates by a single master clock input of various frequencies. Two clock output references are also offered. The device is offered in a 256-pin TE-CSBGA, the smallest package available for a 16-channel LIU.
FEATURES
16 E1, T1, or J1 Short-Haul Line Interface Units Independent E1, T1 or J1 Selections Fully Internal Impedance Match Requires No External Resistors Software-Selectable Transmit and ReceiveSide Impedance Match Crystal-Less Jitter Attenuator Selectable Single-Rail and Dual-Rail Mode and AMI or HDB3/B8ZS Line Encoding and Decoding Detection and Generation of AIS Digital/Analog Loss of Signal Detection as per T1.231, G.775 and ETS 300 233 External Master Clock Can Be Multiple of 2.048MHz or 1.544MHz for T1/J1 or E1 Operation; This Clock Will Be Internally Adapted for T1 or E1 Usage Receiver Signal Level Indicator from -2.5dB to -20dB in 2.5dB Increments Two Built-In BERT Testers for Diagnostics 8-Bit Parallel Interface Support for Intel or Motorola Mode or a 4-Wire Serial Interface Transmit Short-Circuit Protection G.772 Nonintrusive Monitoring Receive Monitor Mode Handles Combinations of 14dB to 20dB of Resistive Attenuation Along with 12dB to 30dB of Cable Attenuation Specification Compliance to the Latest T1 and E1 Standards—ANSI T1.102, AT&T Pub 62411, T1.231, T1.403, ITU-T G.703, G.742, G.775, G.823, ETS 300 166, and ETS 300 233 Single 3.3V Supply with 5V Tolerant I/O JTAG Boundary Scan as Per IEEE 1149.1
APPLICATIONS
T1 Digital Cross-Connects ATM and Frame Relay Equipment Wireless Base Stations ISDN Primary Rate Interface E1/T1/J1 Multiplexer and Channel Banks E1/T1/J1 LAN/WAN Routers
FUNCTIONAL DIAGRAM
JTAG
SOFTWARE CONTROL AND JTAG
LOSS
RTIP RRING TTIP TRING
RECEIVER TRANSMITTER 1
RPOS RNEG RCLK TPOS TNEG TCLK
ORDERING INFORMATION
16
PART DS26324G DS26324GN
TEMP RANGE 0°C to +70°C -40°C to +85°C
PIN-PACKAGE 256 TE-CSBGA 256 TE-CSBGA
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: 053107
DS26324 3.3V, 16-Channel, E1/T1/J1 Short-Haul Line Interface Unit
TABLE OF CONTENTS
1 STANDARDS COMPLIANCE ...........................................................................................................6 1.1 TELECOM SPECIFICATIONS COMPLIANCE ..........................................................................................6 2 DETAILED DESCRIPTION ...............................................................................................................7 3 4 5 BLOCK DIAGRAMS .........................................................................................................................8 PIN DESCRIPTION .........................................................................................................................10 FUNCTIONAL DESCRIPTION........................................................................................................17 5.1 PORT OPERATION .........................................................................................................................17
5.1.1 5.1.2 5.1.3 Serial Port Operation .......................................................................................................................... 17 Parallel Port Operation........................................................................................................................ 18 Interrupt Handling ............................................................................................................................... 18
5.2 5.3 5.4
POWER-UP AND RESET .................................................................................................................19 MASTER CLOCK ............................................................................................................................19 TRANSMITTER ...............................................................................................................................20
Transmit Line Templates .................................................................................................................... 22 LIU Transmit Front-End .........................................................................................................