DS2143QN/T&R

Telecom Overview

The DS2143QN/T&R is an E1 controller manufactured by Analog Devices Inc./Maxim Integrated. It operates as a software-driven framer designed to interface with microcontrollers or microprocessors via a parallel control port. The device supports E1/ISDN-PRI framing, including CAS, CCS, and CRC4 formats. Key specifications include a 5V supply voltage, low power consumption of 50 mW, and onboard two-frame elastic store slip buffer. It features HDB3 coder/decoder, full alarm detection, and programmable output clocks for fractional E1 links. The component is available in a 44-pin PLCC package.

Telecom Feature Summary

• Supports E1/ISDN-PRI framing with CAS, CCS, and CRC4 formats
• Includes onboard two-frame elastic store slip buffer
• Features parallel control port for microcontroller interfacing
• Provides CAS signaling bit extraction and insertion

Telecom Applications

• E1 line interface units
• Fractional E1 applications
• ISDN-PRI channel service units

Telecom Procurement Notes

Verify the specific ordering suffix 'QN/T&R' against official documentation to confirm tape-and-reel packaging and RoHS compliance status. Confirm that the manufacturer designation matches current Analog Devices Inc. records, as Maxim Integrated branding may vary in legacy documentation. Ensure the component meets all required environmental and electrical standards for the intended deployment.

Telecom Selection Notes

Select this component when an E1 controller with integrated elastic store and HDB3 coding is required. It is suitable for designs needing flexible software configuration for various E1 framing modes. Consider the 44-pin PLCC package constraints and 5V logic levels during system architecture planning. Verify compatibility with the host microcontroller's bus timing requirements.

Telecom Part Context

The DS2143 is part of the DS21xx series of telecom interface ICs from Analog Devices/Maxim Integrated. It serves as a comprehensive E1 framer solution, often used in conjunction with transceivers like the DS2155. The device is pin-compatible with the DS2141A T1 Controller, facilitating design transitions between T1 and E1 systems while maintaining similar control interfaces.

Telecom Replacement Considerations

The DS2141A is noted as pin-compatible but functions as a T1 controller rather than an E1 framer. Direct substitution requires verifying protocol differences. No other public substitute part numbers are confirmed in the provided documentation.