DS21352LB+

Telecom Overview

The DS21352LB+ is a single-chip T1 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a 3.3V supply with a voltage range of 3.135V to 3.465V and supports data rates up to 2.048 Mb/s. The device features one channel and utilizes an LQFP-100 package (14 mm x 14 mm). It functions as a complete DS1/ISDN-PRI/J1 transceiver, incorporating long and short haul Line Interface Units (LIU), a crystal-less jitter attenuator, and an HDLC controller with 64-byte buffers. Operating temperatures range from 0°C to +70°C.

Telecom Feature Summary

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

Telecom Applications

• DS1/ISDN-PRI/J1 transceiver systems
• Long and short haul Line Interface Unit (LIU) connections
• HDLC controller applications for FDL or DS0 operations
• Asynchronous backplane interfaces up to 8.192MHz

Telecom Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm the specific ordering suffix matches the required temperature range and voltage specifications. Check for RoHS compliance documentation and ensure the package type aligns with PCB design requirements. Review datasheet revisions for any functional updates before integration.

Telecom Selection Notes

Select this component for designs requiring a 3.3V T1 transceiver with integrated LIU and HDLC capabilities. Ensure the operating environment stays within the 0°C to +70°C temperature range. Verify that the LQFP-100 package fits the available board space. Consider the crystal-less jitter attenuation feature if external clock sources are unavailable.

Telecom Part Context

This part belongs to the DS21352 series, which are superset versions of the DS2152 T1 single-chip transceiver. It retains original features while adding interleaving PCM bus operation, JTAG boundary scan, and 3.3V I/O support. The device is pin-compatible with other SCTs like the DS2152, DS2154, DS21354, and DS21554.

Telecom Replacement Considerations

Pin-compatible replacements include DS2152, DS2154, DS21354, and DS21554. Verify software compatibility when migrating from the DS2152, as the DS21352/552 offers additional features.