DS2175+

Telecom Overview

The DS2175 is a low-power CMOS elastic-store memory designed for primary rate telecommunications transmission equipment. It serves as a synchronizing element between asynchronous data streams, supporting North American T1 (1.544 MHz) and European CEPT (2.048 MHz) networks. The device features a 2-frame buffer depth, utilizing 64 bytes for 2.048 MHz to 2.048 MHz applications and 48 bytes for other modes. Operating conditions include a supply voltage range of 4.5 V to 5.5 V and an operating temperature range of 0°C to 70°C. Supply current typically ranges from 9 mA to 16 mA at VDD = 5V.

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
• Support for parallel and serial backplane interfaces

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 package variant required, as the base part number covers both DIP and SOIC formats. Confirm that the commercial temperature range meets the application requirements. Ensure compatibility with associated transceivers like the DS2180A or DS2181A during integration planning.

Telecom Selection Notes

Select the appropriate clock select pins based on whether the application involves T1 or CEPT frequencies. Determine if serial or parallel backplane operation is needed to configure the S/P input correctly. Verify that the buffer depth monitoring and slip reporting signals align with the system's error handling architecture.

Telecom Part Context

The DS2175 belongs to the family of T1/CEPT elastic store devices manufactured by Analog Devices Inc./Maxim Integrated. It is specifically optimized for interconnecting different telecommunication rates and eliminating support logic in TDM backplane designs.

Telecom Replacement Considerations

Check for updated versions within the same product line that may offer extended temperature ranges or alternative packaging options while maintaining functional compatibility.