DS21Q59LN+

Telecom Overview

The DS21Q59LN+ is a quad E1 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates four complete E1 (CEPT) PCM-30/ISDN-PRI transceivers within a single package, serving as a direct replacement for the DS21Q50 with added signaling access and improved interrupt handling. The device comprises a line interface unit (LIU), framer, and TDM backplane interface. It operates on a 3.3V low-power CMOS supply with a voltage range of 3.135V to 3.465V. The component supports an operating temperature range from -40°C to +85°C and is housed in a 100-pin LQFP package.

Telecom Feature Summary

• Supports four independent E1 lines with integrated LIU, framer, and TDM backplane interface
• Features crystal-less jitter attenuation and flexible system clock with automatic source switching
• Configurable parallel and serial host interfaces supporting Intel or Motorola bus operations
• Includes elastic-store slip buffer and interleaving PCM bus operation capabilities

Telecom Applications

• DSLAMs
• Routers
• IMA and WAN Equipment

Telecom Procurement Notes

Verify the specific suffix 'LN+' to confirm the extended industrial temperature range (-40°C to +85°C). Confirm that the ordering information matches the required pin-package configuration. Check for any applicable errata documentation regarding device revisions before finalizing procurement specifications.

Telecom Selection Notes

Select this component when high-density termination of E1 lines is required. Ensure the design accommodates the 100-pin LQFP footprint. Verify compatibility with the host system's bus requirements, as the device supports both parallel and serial port configurations for control and data transfer.

Telecom Part Context

This device belongs to the DS21Q59 series of E1 quad transceivers. It is functionally compatible with the DS21Q50 but includes enhancements such as signaling access and improved interrupt handling. The product line is managed by Analog Devices following the acquisition of Maxim Integrated.

Telecom Replacement Considerations

The DS21Q59 serves as a direct replacement for the DS21Q50. Designers upgrading from the DS21Q50 should verify that the additional signaling access features are utilized correctly within the existing system architecture.