MT93L16AQ1

Telecom Overview

The MT93L16AQ1 is an acoustic echo canceller (AEC) for analog hands-free communication manufactured by Zarlink Semiconductor Inc. It contains two echo cancellers: an 112 ms acoustic echo canceller and a 16 ms line echo canceller. The device supports low-cost voice codecs including ITU-T G.711, signed magnitude µ/A-Law, or linear 2’s complement formats. It operates on a 2.7 V to 3.6 V supply voltage with 5 V-tolerant inputs. The component features a serial micro-controller interface and supports ST-BUS, GCI, or variable-rate SSI PCM interfaces at up to 4096 kbit/s. It includes advanced non-linear processing, howling prevention, and narrow-band signal detection.

Telecom Feature Summary

• Advanced Non-Linear Processor (ADV-NLP) design enabling full-duplex speech without switched loss on audio paths
• Fast re-convergence adaptation algorithm that tracks changing echo environments even during double-talk conditions
• Integrated protection mechanisms against narrow-band signal divergence and uncontrolled oscillation in high loop gain conditions
• Bootloadable program RAM architecture allowing future factory software upgrades

Telecom Applications

• Full duplex speaker-phone for digital telephone
• Echo cancellation for video conferencing
• Hands-free operation in automobile environments
• Full duplex speaker-phone for PC

Telecom Procurement Notes

Verify the ordering suffix AQ1 indicates Pb Free Matte Tin packaging and a -40°C to +85°C operating temperature range. Confirm the package type is 36 Pin QSOP Tubes as specified in the official datasheet. Ensure compatibility with the original Zarlink Semiconductor specifications before procurement.

Telecom Selection Notes

Select this component for applications requiring simultaneous acoustic and line echo cancellation. It is suitable for designs needing support for multiple PCM coding formats like G.711 and linear 2’s complement. Consider its 5 V-tolerant inputs if interfacing with mixed voltage logic systems. Verify that the required PCM interface modes (ST-BUS, GCI, or SSI) align with the system architecture.

Telecom Part Context

The MT93L16 is part of the AEC family for analog hands-free communication. It serves as a precursor to newer generations like the ZL38002 and ZL38004, which offer noise reduction and integrated codecs. While the MT93L16 focuses on basic echo cancellation, it provides essential functions like user gain control and AGC for reliable voice transmission.

Telecom Replacement Considerations

Zarlink recommends the ZL38002 and ZL38004 for new designs. These alternatives provide additional noise reduction and codec integration capabilities not present in the MT93L16 series.