Description
M34116C1 STMicroelectronics IC Communication Switching Matrix PCM Conference Call And Tone Generation Circuit 5V 50 mA PLCC28 (
Specifications
Manufacturer: STMicroelectronics
Product Category: Communication ICs – Various
Product: PCM Digital Exchanges
Operating Supply Voltage: 5 V
Operating Supply Current: 50 mA
Maximum Operating Temperature: + 70 C
Mounting Style: SMD/SMT
Package / Case: PLCC-28
Brand: STMicroelectronics
Minimum Operating Temperature: 0 C
Series: M34116
Supply Voltage – Max: 5.25 V
Supply Voltage – Min: 4.75 V
Unit Weight: 0.041719 oz
The M34116 is a product specifically designed for applications in PCM digital exchanges. It is able to handle up to 64 channels in any conferences combination from 1 to 29 conferences in parallel and to generate seven different tones and one melody. The is a product specifically designed for applications in PCM digital exchanges. It is able to handle to 64 channels in any conferences combination from to 29 conferences in parallel and to generate seven different tones and one melody. The parties in a conference must previously be allocated through the Digital Switching Matrix in a single serial wire at M34116 PCM input (IN PCM pin). The M34116 is full pin and function compatible with the M116. In addition, it has the capability to generate tone directly coded in PCM. For the conference function, each channel is converted inside the chip from PCM law to linear law (14 bits). Then it is added to its conference, and the sample of the previous frame is subtracted from the conference. In this way a new conference sum signal is generated. The channel output signal will contain the information of all the other channels in its conference except its own. After the PCM encoding, the data is serialized by the M34116 in the same sequence as the PCM input frame, with one frame (plus one channel) delay and will be reallocated by the DSM (M3488) at the final channel and bus position. A programmable attenuation or gain can be set on each channel and for every function: conference, tone generation and transparent mode.
Manufacturer:STMicroelectronics
Datasheet:M34116.pdf
