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ML7074-001GA
 Speech CODEC for VoIP
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This is an obsolete
product. The document is for reference only.
Description
Oki
Semiconductor's ML7074-001GA is a speech CODEC designed for VoIP applications.
This CODEC allows conformance selection for various VoIP standard environments
including G.729.A (8 kbps), G.726 (32 kbps), G.711 (64 kbps) µ-law, and A-law,
and a mutual conversion function between G.729.A and G.726.
The ML7074-001GA is optimized for adding VoIP functions to terminal adapters,
routers, and IP-phones with a rich feature set that includes an echo canceller
for 32 msec delay, DTMF detection, two tone detection functions, and tone
generation, built-in FIFOs, I/P and O/P amplifiers. This CODEC uses a single
3.3-V power supply and has a 64-pin plastic QFP (QFP64-P-1414-0.80-BK) package.
Block Diagram
Features
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Single 3.3-V power supply operation (DVDD 0, 1, 2, AVDD : 3.0
to 3.6 V) |
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Speech CODEC:
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Selectable among G.729.A (8 kbps), G.726 (32 kbps), G.711 (64
kbps) µ-law, and A-law |
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Mutual conversion function between G.729.A (8 kbps) and G.726
(32 kbps). | |
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Echo canceller for 32 ms delay |
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DTMF detection function |
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Tone detection function: 2 systems (1650 Hz, 2100 Hz: Detect
frequency can be changed.) |
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Tone generation function |
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FSK generation function |
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Dial pulse detection function |
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Dial pulse transmit function |
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Internal 1-channel 16-bit timer |
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Built-in FIFO buffers (640 bytes) for transferring transmit
and receive data:
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Frame / DMA (slave) interface selectable.
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Master clock frequency: 4.096 MHz (crystal oscillation or
external input) |
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Hardware or software power-down operation option |
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Analog input / output type:
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Two built-in input amplifiers, 10 k driving |
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Two built-in output amplifiers, 10 k driving
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Package:
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64-pin plastic QFP (QFP64)
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Applications
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VoIP applications - G.729.A, G.726, G.711 µ-law, and A-law
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Terminal adapters |
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Routers and gateways |
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I / P-phones
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