DS21552LN

Telecom Overview

The DS21552LN+ is a 5V T1 single-chip transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 3.135 V to 3.465 V and supports data rates up to 64 kb/s per channel. The device features one channel and utilizes an LQFP-100 package (14 mm x 14 mm). It functions as a telecom interface IC designed for T1 line connections, supporting both long-haul and short-haul applications with integrated jitter attenuation and framer capabilities.

Telecom Feature Summary

• Supports complete DS1/ISDN-PRI/J1 transceiver functionality with long and short haul line interface unit capabilities.
• Includes a crystal-less jitter attenuator that generates DSX-1 and CSU line build-outs.
• Features an HDLC controller with 64-byte buffers configurable for FDL or DS0 operation.
• Integrates dual two-frame elastic store slip buffers connecting to asynchronous backplanes up to 8.192MHz.

Telecom Applications

• T1/E1/J1 Line Cards
• Switches and Routers
• Add-Drop Multiplexers

Telecom Procurement Notes

Verify the specific suffix 'LN' confirms the -40°C to +85°C industrial temperature range and 5V supply requirement. Confirm RoHS compliance status through official documentation. Check current availability as distribution may be limited. Ensure the ordering part number matches the exact pinout and electrical specifications required for the design.

Telecom Selection Notes

Select this component when a 5V T1 transceiver with industrial temperature rating is required. Compare against the DS21352LN if a 3.3V supply is preferred. Verify compatibility with Intel or Motorola bus operations via the parallel control port. Ensure the application requires the specific interleaving PCM bus operation and JTAG boundary scan features provided by this device.

Telecom Part Context

The DS21552LN+ belongs to the DS21352/DS21552 family, which are superset versions of the DS2152. These devices retain original DS2152 features while adding new functionalities like interleaving PCM bus operation and hardware signaling. The 'LN' suffix specifically denotes the extended temperature range variant compared to the standard 'L' version.

Telecom Replacement Considerations

The DS21552L+ serves as a direct replacement for commercial temperature range requirements. The DS2152 is a compatible predecessor with software transferability. The DS21352LN is functionally similar but operates at 3.3V instead of 5V. Verify pin compatibility and power supply differences before substitution.