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TSH512 bảng dữ liệu(PDF) 23 Page - STMicroelectronics

tên linh kiện TSH512
Giải thích chi tiết về linh kiện  Hi-fi stereo/mono infrared transmitter and stereo sub-carrier generator
PDF  31 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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TSH512 bảng dữ liệu(HTML) 23 Page - STMicroelectronics

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TSH512
General description
Doc ID 8120 Rev 7
23/31
The monostable holds the TSH512 in transmit mode during a delay fixed by the value of
CTRIG connected to pin 29.
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
VOX
DELAY
1.4V
5
μA
------------
⎝⎠
⎛⎞
C
trig
⋅
=
time
VOX -MUTE
POWER SUPPLY
on
off
VOX Delay
(Ctrig)
0
1
high state if retriggered by audio



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