M34116B1

Product Summary

The M34116B1 is a PCM TONE CIRCUIT. 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 parties in a conference must previously be allocated through the Digital Switching Matrix (M3488) in a single serial wire at M34116B1 PCM input (IN PCM pin). The M34116B1 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 conferencesum signal is generated. The channel output signal will contain the information of all the other channels in its conference except its own.

Parametrics

M34116B1 absolute maximum ratings: (1)VDD Supply Voltage: - 0.3 to 7 V; (2)Vi Input Voltage: - 0.3 to VDD; (3)VO (off) Off State Output Voltage: -0.3 to 7 V; (4)Ptot Total Power Dissipation: 500 mW; (5)Tstg Storage Temperature: -65 to 150 ℃; (6)Top Operating Temperature: 0 to 70 ℃.

Features

M34116B1 features: (1)hw and sw compatible with m116; (2)1 to 64 serial channels per frame (controlled by sync signal period); (3)29 maximum conferences; (4)1 to 64 serial channels per conferences; (5)3 simultaneous operation modes available:; (6)conference, transparent and tone generation; (7)typical bit rates: 1536/1544/2048/4096kbits/s; (8)compatible with all kinds of pcm format; (9)μ and a law (pin programmable); (10)equal priority to every channel; (11)one frame and one channel delay from sending to receiving; (12)overflowinformation for each conference by pin os (overflow signalling) and on data bus on mpu request; (13)instruction setcompatiblewith m3488; (14)programmable input and output attenuation; (15)or gain from 0 to 15db with step of 1db for each channel; (16)tone generation from 3.9hz to 3938hz with min. step of 3.9hz; (17)1 melody of maximum 32 programmable frequencies and durations; (18)5v power supply; (19)ttl compatible input levels, cmos/ttl compatible output levels.

Diagrams