Features: • Programmable -Law/A-Law codec and filters• Programmable CCITT (G.711)/sign-magnitude coding• Programmable transmit, receive and side-tone gains• DSP-based: i) Speakerphone switching algorithm ii) DTMF and single tone generator iii) Tone Ringer• Differentia...
MT9094: Features: • Programmable -Law/A-Law codec and filters• Programmable CCITT (G.711)/sign-magnitude coding• Programmable transmit, receive and side-tone gains• DSP-based: i) Spe...
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Parameter | Symbol | Min | Max | Units | |
1 | Supply Voltage | VDD-VSS | -0.3 | 7 | V |
2 | Voltage on any I/O pin | VI/VO | VSS-0.3 | VDD+0.3 | V |
3 | Current on any I/O pin (transducers excluded) | II/IO | ±20 | mA | |
4 | Storage Temperature | TS | -65 | +150 | |
5 | Power Dissipation (package) Plastic | PD | 750 | mW | |
6 | Static Discharge | ESD | ±2.0 | KV | |
7 | Latch-up Current | ILU | ±100 | mA |
The MT9094 DPhone-II is a fully featured integrated digital telephone circuit. Voice band signals are converted to digital PCM and vice versa by a switched capacitor Filter/Codec. The Filter/Codec uses an ingenious differential architecture to achieve low noise operation over a wide dynamic range with a single 5V supply. A Digital Signal Processor of MT9094 provides handsfree speaker-phone operation. The DSP is also used to generate tones (DTMF, Ringer and Call Progress) and control audio gains. Internal registers are accessed through a serial microport conforming to INTEL MCS-51™ specifications. The MT9094 is fabricated in Mitel's low power ISO2-CMOS technology.