Description
The MT91L60/61 3 V Multi-featured Codec incorporates a built-in Filter/Codec, gain control and programmable sidetone path as well as on-chip anti-alias filters, reference voltage and bias source. The device supports both ITU T and sign- magnitude A-Law and µ-Law requirements. The MT91L60/61 is a true 3 V device employing a fully differential architecture to ensure wide dynamic range.
Complete telephony interfaces are provided for connection to handset transducers. Internal register access is provided through a serial microport compatible with various industry standard micro-controllers.
The MT91L60/61 is fabricated in Zarlink's ISO2-CMOS technology ensuring low power consumption and high reliability.

Features
• Single 2.7-3.6 volt supply operation
• MT91L61 version features a delayed framing pulse in SSI and ST-BUS modes to facilitate cascaded devices
• Programmable µ-Law/A-Law Codec and Filters
• Programmable ITU-T (G.711)/sign-magnitude coding
• Programmable transmit, receive and side-tone gains
• Fully differential interface to handset transducers
- including 300 ohm receiver driver
• Flexible digital interface including ST-BUS/SSI
• Serial microport
• Low power operation
• ITU-T G.714 compliant
• Multiple power down modes

Applications
• Battery operated equipment
• Digital telephone sets
• Cellular radio sets
• Local area communications stations
• Pair Gain Systems
• Line cards