TSH512 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TSH512' PDF : 32 Pages View PDF
TSH512
General description
The monostable holds the TSH512 in transmit mode during a delay fixed by the value of
CTRIG connected to pin 29.
VOXDELAY = ⎝⎛1-5---.-μ4---A-V---⎠⎞ ⋅ Ctrig
Note that the VOX function is activated when the audio signal enters the first transmitter
TX1.
When the application needs a permanent transmission, it is possible to inhibit the VOX
function, by removing the Ctrig capacitor and connecting pin 29 to ground.
As soon as the TSH512 is powered-on, the internal reset circuitry sets the VOX-MUTE to
high state to enable transmission. The transmission remains during the monostable timing
and continues if an audio signal triggers the monostable.
Figure 31. VOX state at power-on
on
POWER SUPPLY
off
1
VOX -MUTE
0
VOX Delay
(Ctrig)
high state if retriggered by audio
time
Doc ID 8120 Rev 7
23/31
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