DS3181+

Specialized ICS Overview

The DS3181+ is a single-port ATM/Packet PHY with an integrated Line Interface Unit (LIU) designed for mapping and demapping ATM cells or HDLC packets into DS3, E3, or clear-channel data streams. It operates on a single 3.3V supply with 5V-tolerant I/O and supports standard framing protocols including M23, C-bit, G.751, and G.832. The device features a 400-pin TE-PBGA package measuring 27mm x 27mm with a 1.27mm pitch. It provides universal PHY capabilities for DS3, E3, and Clear-Channel 52Mbps applications, supporting UTOPIA L2/L3, POS-PHY L2/L3, or SPI-3 system interfaces.

Specialized ICS Feature Summary

• Integrates a single DS3/E3 framer and LIU with ATM cell/HDLC packet processor
• Supports UTOPIA L2/L3, POS-PHY L2/L3, and SPI-3 interfaces with 8-, 16-, or 32-bit bus widths
• Includes built-in BERTs, HDLC controllers with 256-byte FIFOs, and performance-monitoring counters
• Features programmable subrate support and flexible overhead insertion/extraction ports

Specialized ICS Applications

• Access Concentrators
• SONET/SDH ADM and Muxes
• Multiservice Access Platform (MSAP)
• Integrated Access Device (IAD)
• Routers and Switches

Specialized ICS Procurement Notes

Verify the component status as the product may be discontinued. Confirm that the ordering suffix '+' indicates a lead-free package option. Ensure the specific temperature range matches the application requirements, as the base model covers 0°C to +70°C while the 'N' variant extends to -40°C to +85°C.

Specialized ICS Selection Notes

Select the DS3181+ for single-port implementations requiring integrated LIU functionality. Consider the DS3181N variant if industrial temperature operation (-40°C to +85°C) is required. Verify compatibility with existing PCB platforms, as the device is pin-compatible with the DS317x and DS316x families to facilitate port density migration.

Specialized ICS Part Context

The DS3181+ belongs to the DS318x family, which includes dual (DS3182), triple (DS3183), and quad (DS3184) variants. These devices share identical packaging and pinouts to allow for scalable design architectures. The series integrates hardware support for both ATM cells and packets within a high-density BGA package.

Specialized ICS Replacement Considerations

The DS3181+ is pin-compatible with the DS3171 and DS3161 models. Designers migrating from these families can utilize the same PC board platform without layout changes.