DESCRIPTION The IDT82P20416 is a 16-channel high-density T1/E1/J1 short haul Line Interface Unit. Each channel of the IDT82P20416 can be independently configured. The configuration is performed through a Serial microprocessor interface. FEATURES ◆ Integrates 16 channels T1/E1/J1 short haul line interface units for 100 Ω T1, 120 Ω E1, 110 Ω J1 twisted pair cable and 75 Ω E1 coaxial cable applications ◆ Per-channel configurable Line Interface options • Fully integrated and software selectable receive and transmit termination – Option 1: Fully Internal Impedance Matching with integrated receive termination resistor – Option 2: Partially Internal Impedance Matching with common external resistor for improved device power dissipation – Option 3: External impedance Matching termination • Supports global configuration and per-channel configuration to T1, E1 or J1 mode ◆ Per-channel programmable features • Provides T1/E1/J1 short haul waveform templates and user programmable arbitrary waveform templates • Provides two JAs (Jitter Attenuator) for each channel of receiver and transmitter • Supports AMI/B8ZS (for T1/J1) and AMI/HDB3 (for E1) encoding and decoding ◆ Per-channel System Interface options • Supports Single Rail, Dual Rail with clock or without clock and sliced system interface • Integrated Clock Recovery for the transmit interface to recover transmit clock from system transmit data ◆ Per-channel system and diagnostic functions • Provides transmit driver over-current detection and protection with optional automatic high impedance of transmit interface • Detects and generates PRBS (Pseudo Random Bit Sequence), ARB (Arbitrary Pattern) and IB (Inband Loopback) in either receive or transmit direction • Provides defect and alarm detection in both receive and transmit directions. – Defects include BPV (Bipolar Violation) /CV (Code Violation) and EXZ (Excessive Zeroes) – Alarms include LLOS (Line LOS), SLOS (System LOS), TLOS (Transmit LOS) and AIS (Alarm Indication Signal) • Programmable LLOS detection /clear levels. Compliant with ITU and ANSI specifications • Various pattern, defect and alarm reporting options – Serial hardware LLOS reporting (LLOS, LLOS0) for all 16 channels – Register access to individual registers or 16-bit error counters • Supports Analog Loopback, Digital Loopback and Remote Loopback • Supports T1.102 line monitor ◆ Hitless Protection Switching (HPS) without external Relays • Supports 1+1 and 1:1 hitless protection switching • Asynchronous hardware control (OE, RIM) for fast global high impedance of receiver and transmitter (hot switching between working and backup board) • High impedance transmitter and receiver while powered down • Per-channel register control for high impedance, independent for receiver and transmitter ◆ Clock Inputs and Outputs • Flexible master clock (N x 1.544 MHz or N x 2.048 MHz) (1 ≤ N ≤ 8, N is an integer number) • Integrated clock synthesizer can multiply or divide the reference clock to a wide range of frequencies: 8 KHz, 64 KHz, 2.048 MHz, 4.096 MHz, 8.192 MHz, 19.44 MHz and 32.768 MHz ◆ Microprocessor Interface • Supports Serial microprocessor interface ◆ Other Key Features • IEEE1149.1 JTAG boundary scan • Two general purpose I/O pins • 3.3 V I/O with 5 V tolerant inputs • 3.3 V and 1.8 V power supply • Package: 484-pin Fine Pitch BGA (19 mm X 19 mm) ◆ Applicable Standards • AT&T Pub 62411 Accunet T1.5 Service • ANSI T1.102, T1.403 and T1.231 • Bellcore TR-TSY-000009, GR-253-CORE and GR-499-CORE • ETSI CTR12/13 • ETS 300166 and ETS 300 233 • G.703, G.735, G.736, G.742, G.772, G.775, G.783 and G.823 • O.161 • ITU I.431 and ITU O.171 APPLICATIONS ◆ SDH/SONET multiplexers ◆ Central office or PBX (Private Branch Exchange) ◆ Digital access cross connects ◆ Remote wireless modules ◆ Microwave transmission systems
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