DS21352LN

Telecom Overview

The DS21352LN is a T1 single-chip transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a 3.3V supply with 5.0V I/O tolerance and supports data rates of 1.544 Mb/s. The device features a 100-pin LQFP package (14 mm x 14 mm) and functions as a complete DS1/ISDN-PRI/J1 transceiver. It includes long and short haul line interface units, crystal-less jitter attenuation, and generates DSX-1 and CSU line build-outs. The operational temperature range for the LN suffix is -40°C to +85°C.

Telecom Feature Summary

• Complete DS1/ISDN-PRI/J1 transceiver functionality with long and short haul line interface capabilities
• Integrated HDLC controller featuring 64-byte buffers configurable for FDL or DS0 operation
• Dual two-frame elastic store slip buffers supporting asynchronous backplanes up to 8.192MHz
• IEEE 1149.1 JTAG-Boundary Scan architecture for test access

Telecom Applications

• T1 network connections including DS1 long haul and DSX-1 short haul applications
• Hardware-based signaling systems requiring per-channel loopback and idle code insertion
• Interleaved PCM bus operations involving multiple synchronized transceivers

Telecom Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm the specific LN suffix indicates the extended industrial temperature range (-40°C to +85°C). Check for RoHS compliance status and ensure the package matches the 100-pin LQFP specification. Validate that the part number corresponds to the 3.3V supply variant rather than the 5V DS21552 series.

Telecom Selection Notes

Select this component when a 3.3V power supply is required alongside 5.0V tolerant I/O interfaces. Ensure compatibility with existing DS2152 designs if migration is planned, as pinouts remain consistent. Verify that the application requires the specific interleaving PCM bus operation or advanced HDLC buffering features provided by this superset version.

Telecom Part Context

The DS21352LN belongs to the DS21352/DS21552 family of T1 single-chip transceivers. It serves as a 3.3V superset of the legacy DS2152 device, retaining original software compatibility while adding modern features like JTAG and enhanced HDLC controllers. The LN designation specifically denotes the industrial temperature grade extension compared to the commercial L variant.

Telecom Replacement Considerations

The DS21352L is a direct functional replacement offering identical specifications but limited to commercial temperature ranges (0°C to +70°C). For 5V supply requirements, the DS21552LN provides equivalent performance with adjusted voltage levels. Legacy DS2152 designs can migrate directly due to pin and software compatibility.