DS21552L

Telecom Overview

The DS21552L is a single-chip T1 transceiver designed for 5V operation, manufactured by Analog Devices Inc./Maxim Integrated. It provides complete DS1/ISDN-PRI/J1 transceiver functionality with long and short haul line interface unit (LIU) capabilities. The device features a crystal-less jitter attenuator and generates DSX-1 and CSU line build-outs. It includes an HDLC controller with 64-byte buffers configurable for FDL or DS0 operation. Dual two-frame elastic store slip buffers connect to asynchronous backplanes up to 8.192MHz. The component operates within a temperature range of 0°C to +70°C and utilizes a 100-pin LQFP package.

Telecom Feature Summary

• Supports long and short haul LIU functions with automatic clock recovery for lines up to 6000 feet.
• Integrates an HDLC controller with 64-byte buffers configurable for FDL or DS0 operation.
• Features dual two-frame elastic store slip buffers connecting to asynchronous backplanes up to 8.192MHz.
• Includes IEEE 1149.1 JTAG-Boundary Scan architecture for test access.

Telecom Applications

• T1 network connections requiring DS1/ISDN-PRI/J1 transceiver functionality
• Short haul and long haul line interface applications
• Systems utilizing asynchronous backplanes up to 8.192MHz

Telecom Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm the operating temperature range. The standard 'DS21552L' designation corresponds to the commercial grade range of 0°C to +70°C. Ensure that the required voltage supply matches the 5V specification for this model variant. Confirm package availability and lead times directly with authorized distributors as stock levels fluctuate.

Telecom Selection Notes

Select the DS21552L when a 5V power supply is required for T1 transceiver applications. This model is software compatible with the DS2152 but offers enhanced features such as interleaving PCM bus operation and hardware signaling capabilities. Verify that the system design accommodates the 100-pin LQFP package dimensions. Consider the DS21352L if a 3.3V supply is preferred instead.

Telecom Part Context

The DS21552L is part of the DS21352/552 series, which are superset versions of the DS2152 T1 single-chip transceiver. These devices retain all original DS2152 features while adding new functionalities like interleaving PCM bus operation and an integral HDLC controller. The series supports both Intel and Motorola bus operations via an 8-bit parallel control port.

Telecom Replacement Considerations

The DS21552L is pin and software compatible with the DS2152, DS2154, DS21354, and DS21554 SCTs. When replacing, ensure the substitute part matches the 5V supply requirement and the 100-pin LQFP package format.