DS21Q44

Enhanced Quad E1 Framer

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Product Lifecycle Obsolete

The models in this product family are no longer available.

Replacement Parts

To find replacement products for this part:

Rochester Electronics and Arrow Supply Assurance have partnered with Analog Devices to source products that have been previously discontinued or have become obsolete.

Documentation & Resources

Data Sheets

DS21Q44: Enhanced Quad E1 Framer Data Sheet (Rev. 1)
6/26/2002

PDF

702K

Reliability Data

DS21Q44 Reliability Data
1/12/2023

PDF

21K

Application Notes

Using RCLK in a BITS/SSU Application
2/4/2002
DS21Q4x, DS215x, and DS21x5y Test Registers
3/29/2001
DS21Q44 vs. DS21Q43A
3/29/2001

Design Notes

Interleaved Bus Operation
3/20/2006
HDLC Configuration of Framers and Transceivers
9/10/2002
Telecom Application Notes Index
8/10/2001
T1/E1 Framer Initialization and Programming
8/10/2001
DS2153 Programming, ETS 300-011 Remote Alarm Generation
5/15/2001
Interfacing to the Fractional T1 and E1
5/4/2001

Technical Articles

E1 Operation of Dallas Semiconductor Framers and SCTs
9/10/2002

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.