DS2175S+

Telecom Overview

The DS2175S+ is a low-power CMOS elastic-store memory device designed for T1 and CEPT transmission systems. It synchronizes loop-timed and system-timed data streams on frame boundaries, supporting interfaces between T1 (1.544 MHz) and CEPT (2.048 MHz). The component features a 2-frame buffer depth with comprehensive slip control logic that ensures slips occur only on frame boundaries. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to +70°C. The device is housed in a 16-pin SOIC package.

Telecom Feature Summary

• Rate buffering for T1 and CEPT transmission systems
• Synchronization of loop-timed and system-timed data streams on frame boundaries
• Comprehensive on-chip slip control logic with reporting capabilities
• Compatibility with parallel and serial backplanes

Telecom Applications

• Digital trunks
• Drop and insert equipment
• Digital cross-connects (DACS)
• Private network equipment
• PABX-to-computer interfaces such as DMI and CPI

Telecom Procurement Notes

Verify the specific suffix designation when sourcing components, as it indicates the operational temperature range and packaging configuration. Confirm compliance with environmental standards such as RoHS requirements prior to integration. Ensure that the selected variant matches the required thermal specifications for the intended application environment to maintain reliable operation.

Telecom Selection Notes

Select the DS2175S+ for commercial temperature applications ranging from 0°C to +70°C. For industrial environments requiring extended temperature coverage from -40°C to +85°C, the DS2175N+ variant should be chosen instead. Both variants share identical electrical characteristics and pinouts, differing primarily in their qualified operating temperature ranges and associated packaging options.

Telecom Part Context

The DS2175 belongs to the Maxim Integrated family of telecom interface ICs optimized for primary rate telecommunications transmission equipment. It serves as a synchronizing element between asynchronous data streams and is compatible with North American T1 and European CEPT rate networks. The device eliminates support logic and hardware currently required to interconnect parallel or serial TDM backplanes.

Telecom Replacement Considerations

The DS2175N+ is the industrial temperature grade equivalent of the DS2175S+. Both devices offer identical functionality and pin configurations but differ in their specified operating temperature ranges.