DS3144

Telecom Overview

The DS3144 is a quad-channel DS3/E3 framer manufactured by Analog Devices Inc./Maxim Integrated. It integrates four independent framers on a single die, supporting M23 DS3, C-Bit Parity DS3, and G.751 E3 formats. The device operates within a temperature range of 0°C to +70°C and utilizes a 144-pin, 13mm x 13mm CSBGA package. It features a 3.3V supply with 5V tolerant I/O and an 8-bit processor port compatible with Intel or Motorola buses.

Telecom Feature Summary

• Integrates four independent DS3/E3 framers with dedicated HDLC, FEAC controllers, and BERTs for each channel.
• Supports flexible LIU interfaces in either Binary (NRZ) or Dual-Rail (POS/NEG) modes without glue logic.
• Includes comprehensive performance monitoring, error detection/generation, and multiple loopback capabilities.
• Features IEEE 1149.1 JTAG support and individually powerable channels for low-power standby operation.

Telecom Applications

• SONET/SDH Muxes
• PDH Muxes
• Digital Cross-Connect Systems
• Access Concentrators
• ATM and Frame Relay Equipment

Telecom Procurement Notes

Verify the specific revision and errata status before integration, as deviations from published specifications may exist. Confirm that the 144-pin CSBGA package dimensions align with the target PCB footprint. Ensure the host system supports the required 3.3V supply voltage and 5V tolerant I/O levels for reliable communication.

Telecom Selection Notes

Select the DS3144 when four independent DS3 or E3 channels are required on a single component. Compare against the DS3141, DS3142, and DS3143 if fewer channels suffice. Consider the DS3144N variant if the application requires an extended industrial temperature range of -40°C to +85°C instead of the commercial range.

Telecom Part Context

The DS3144 belongs to the DS314x family of telecom interface ICs, which also includes the DS3141, DS3142, and DS3143. These devices share a common architecture and pinout but differ in the number of integrated framers. They are designed to replace discrete framing solutions by consolidating formatting, encoding, and monitoring functions into a single chip.

Telecom Replacement Considerations

Public confirmed substitute part numbers: DS3141, DS3142, DS3143.

Telecom FAQ

Can the LIU interface be configured for both NRZ and POS/NEG modes?

Yes, the LIU interface can be configured as either Binary (NRZ) or Dual-Rail (POS/NEG) via register settings.

Does the DS3144 support external timing sources?

Yes, the device supports both external timing and loop-timing configurations.

What types of loopbacks are supported?

The DS3144 supports Line Loopback, Diagnostic Loopback, and Payload Loopback modes.