DS21348G

Telecom Overview

The DS21348G is a single-channel, 3.3V E1/T1/J1 Line Interface Unit (LIU) manufactured by Analog Devices Inc./Maxim Integrated. It operates within a commercial temperature range of 0°C to +70°C and is housed in a 49-ball CSBGA package measuring 7mm x 7mm. The device supports both long-haul and short-haul trunks with internal software-selectable receive-side termination for 75Ω, 100Ω, or 120Ω loads. It features a crystal-less jitter attenuator requiring only a 2.048MHz master clock for E1 and T1 applications, with an option for 1.544MHz MCLK in T1 mode.

Telecom Feature Summary

• Supports complete E1, T1, or J1 line interface unit functionality for both long-haul and short-haul trunk applications.
• Integrates a crystal-less jitter attenuator that requires only a 2.048MHz master clock for operation across E1 and T1 standards.
• Provides programmable monitor modes, loopbacks, and PRBS pattern generation/detection capabilities for diagnostic purposes.
• Generates appropriate line build-outs with and without return loss for E1 and DSX-1/CSU configurations for T1.

Telecom Applications

• Short-haul and long-haul E1/T1/J1 trunk interfaces
• CEPT 30/ISDN-PRI line interfacing
• DSX-1 and CSU line build-out implementations

Telecom Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact temperature range and compliance status. The 'G' suffix indicates a commercial temperature range of 0°C to +70°C, while 'GN' denotes an industrial range. Ensure the selected variant matches the environmental requirements of the target application before procurement.

Telecom Selection Notes

Select the DS21348G when a single-channel 3.3V LIU is required for commercial temperature environments. Consider the DS21348GN if an extended industrial temperature range (-40°C to +85°C) is necessary. Verify that the 49-ball CSBGA package format is compatible with the PCB design constraints and assembly processes available.

Telecom Part Context

The DS21348G belongs to the DS21348 family of telecom interface ICs designed for E1/T1/J1 applications. It serves as a complete Line Interface Unit (LIU), integrating analog front-end functions with digital control interfaces. This component is part of Maxim Integrated's portfolio, now under Analog Devices, focusing on high-performance telecommunications signaling solutions.

Telecom Replacement Considerations

The DS21348GN+ is a lead-free version with an extended industrial temperature range (-40°C to +85°C). For non-leaded options in the commercial range, the DS21348T+ offers the same functionality in a 44-pin TQFP package. Cross-reference pinouts and thermal characteristics when substituting between package types.