SINGLE CHANNEL T1/E1/J1 IDT82V2081 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT FEATURES Single channel T1/E1/J1 long haul/short haul line interface - Receiver or transmitter power down Supports HPS (hitless protection Switching) for 1+1 protection - High impedance setting for line drivers without external relays - PRBS (pseudo random bit sequence) generation and detection with 15 Receiver sensitivity exceeds -36 dB 772KHz and -43 dB 1024 2 -1 PRBS polynomials for E1 KHz - QRSS (quasi random signal source) generation and detection with Programmable T1/E1/J1 switchability allowing one bill of ma- 20 2 -1 QRSS polynomials for T1/J1 terial for any line condition - 16-bit BPV (bipolar pulse violation) /excess zero/PRBS or QRSS Single 3.3 V power supply with 5 V tolerance on digital interfaces error counter Meets or exceeds specifications in - Analog loopback, digital loopback, remote loopback and inband loop- - ANSI T1.102, T1.403 and T1.408 back - ITU I.431, G.703, G.736, G.775 and G.823 Cable attenuation indication - ETSI 300-166, 300-233 and TBR12/13 Adaptive receive sensitivity - AT&T Pub 62411 Short circuit protection and internal protection diode for line Software programmable or hardware selectable on: drivers - Wave-shaping templates for short haul and long haul LBO (Line Build AIS (alarm indication signal) detection Out) Supports serial control interface, Motorola and Intel multiplexed - Line terminating impedance (T1:100 , J1:110 E1:75 120 interfaces and hardware control mode - Adjustment of arbitrary pulse shape Pin compatible 82V2041E T1/E1/J1 short haul LIU and 82V2051E - JA (Jitter Attenuator) position (receive path or transmit path) E1 short haul LIU - Single rail/dual rail system interfaces Package: - B8ZS/HDB3/AMI line encoding/decoding Available in 44-pin TQFP and 48-pin QFN packages - Active edge of transmit clock (TCLK) and receive clock (RCLK) - Active level of transmit data (TDATA) and receive data (RDATA) DESCRIPTION The IDT82V2081 can be configured as a single channel T1, E1 or J1 and different types of loopbacks can be set according to the applications. line interface unit. In the receive path, an adaptive equalizer is integrated Four different kinds of line terminating impedance, 75 , 100 110 and to remove the distortion introduced by cable attenuation. The IDT82V2081 120 are selectable. The IDT82V2081 also provides driver short-circuit also performs clock/data recovery, AMI/B8ZS/HDB3 line decoding and protection and internal protection diodes. The IDT82V2081 can be con- detects and reports LOS conditions. In the transmit path, there is an AMI/ trolled by either software or hardware. B8ZS/HDB3 encoder, waveform shaper and LBOs. There is one jitter atten- The IDT82V2081 can be used in LAN, WAN, routers, wireless base sta- uator, which can be placed in either the receive path or the transmit path. tions, IADs, IMAs, IMAPs, gateways, frame relay access devices, CSU/ The jitter attenuator can also be disabled. The IDT82V2081 supports both DSU equipment, etc. single rail and dual rail system interfaces. To facilitate the network mainte- nance, a PRBS/QRSS generation/detection circuit is integrated in the chip, IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. 1 January 7, 2019 2019 Integrated Device Technology, Inc. DSC-6228/6IDT82V2081 SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT FUNCTIONAL BLOCK DIAGRAM Figure-1 Block Diagram Functional Block Diagram 2 January 7, 2019