AFE1104E/1K

Analog Front End (AFE) Overview

The AFE1104E/1K is a monolithic HDSL/MDSL Analog Front End fabricated on 0.6μCMOS technology, designed to interface with PairGain Technologies SPAROW digital signal processors. It operates on a single +5V analog supply and supports 3.3V or 5V digital logic. The device integrates transmit and receive sections, providing all active analog circuitry for T1 (196kbps) and E1 (1.168Mbps) operation. Key specifications include a 14-bit resolution receive channel, programmable gain amplifier (0dB to 9dB), and compliance with Bellcore TA-NWT-3017 and ETSI RTR/TM-03036 standards. Power dissipation is typically 250mW at 3.3V digital supply.

Analog Front End (AFE) Feature Summary

• Integrated HDSL/MDSL analog front end supporting T1 and E1 bit rates from 196kbps to 1.168Mbps
• 14-bit receive channel with delta-sigma ADC and programmable gain amplifier (0dB, 3.25dB, 6dB, 9dB)
• Compliant transmit pulse former meeting Bellcore and ETSI power spectral density requirements
• Single +5V analog supply with flexible 3.3V or 5V digital supply options

Analog Front End (AFE) Applications

• HDSL systems connecting to SPAROW digital signal processors
• MDSL line driver applications
• T1/E1 modem analog interfaces

Analog Front End (AFE) Procurement Notes

The AFE1104E/1K carries the marketing status 'NRND' (Not Recommended for New Designs). It is produced in a 48-pin SSOP package with a standard packing quantity of 1000 units per reel. Verification of current production availability and lead times should be conducted directly with Texas Instruments or authorized distributors, as the component is not recommended for new designs.

Analog Front End (AFE) Selection Notes

Select this component for existing HDSL/MDSL designs requiring a complete analog interface solution for T1 or E1 signaling. Ensure the design accommodates a single +5V analog supply and a digital supply between 3.3V and 5V. The device requires an external compromise hybrid and a 1:2 line transformer. Note that the part is NRND; consider long-term supply constraints when integrating into new products.

Analog Front End (AFE) Part Context

The AFE1104E/1K is a variant of the AFE1104 series, distinguished by its tape and reel packaging configuration (suffix /1K indicates 1000 units per reel). It is manufactured by Texas Instruments, which acquired Burr-Brown Corporation, the original designer of this analog front end. The device belongs to the legacy HDSL/MDSL product line.

Analog Front End (AFE) Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. As the AFE1104E/1K is marked NRND, designers should consult Texas Instruments for potential modern replacements or evaluate alternative discrete solutions for new designs.