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The DS21348TN+ from Analog Devices (formerly Maxim Integrated) is a complete E1, T1, or J1 Line Interface Unit (LIU) suitable for both long-haul and short-haul trunk applications. This IC operates on a 3.3V power supply and is housed in a compact 44-TQFP package.
Key features include internal software-selectable receive-side termination for 75Ω, 100Ω, or 120Ω, and a crystal-less jitter attenuator that requires only a 2.048MHz master clock. The device supports various encoding and decoding schemes such as AMI, HDB3, and B8ZS. It can generate appropriate line build-outs for E1 and DSX-1, as well as CSU line build-outs for T1.
Additional capabilities include programmable monitor mode for the receiver, loopbacks, PRBS pattern generation/detection, and the ability to detect/generate Blue (AIS) alarms. The interface supports 8-bit parallel or serial communication, with muxed and nonmuxed parallel bus options. The NRZ/Bipolar interface for Tx/Rx data I/O, transmit open-circuit detection, and receive carrier loss indication are also supported.
The operating voltage for the DS21348TN+ is 3.3V.
The DS21348TN+ operates in a temperature range of -40°C to 85°C.
The DS21348TN+ is available in a 44-TQFP package.
The DS21348TN+ supports AMI, HDB3, and B8ZS encoding and decoding.
Yes, the DS21348TN+ features a crystal-less jitter attenuator.