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TSH512 Datasheet(PDF) 1 Page - STMicroelectronics

No. de pieza TSH512
Descripción Electrónicos  Hi-fi stereo/mono infrared transmitter and stereo sub-carrier generator
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TSH512 Datasheet(HTML) 1 Page - STMicroelectronics

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May 2009
Doc ID 8120 Rev 7
1/31
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TSH512
Hi-fi stereo/mono infrared transmitter
and stereo sub-carrier generator
Features
Supply voltage: 2.3 to 5.5 V
Carrier frequency range: 0.4 to 11 MHz
High versatility: I/O pins for each section
Two FM transmitters for stereo
Sinusoidal carriers for high spectral purity
Micro- or line-level preamplifiers with ALC
VOX function to save on battery power
Transmitter TX2 standby for mono operation
Applications
Infrared hi-fi stereo transmitters
Infrared headsets
Stereo sub-carriers for video transmitters
Voice-operated wireless webcams
FM IF transmit systems
Description
The TSH512 is a 0.4- to 11-MHz dual FM
transmitter. Access pins to each section give high
versatility and allow for several different
applications: stereo headphone, multimedia
headset, audio sub-carrier generator.
The TSH512 integrates in a single chip low-noise
audio preamplifiers with ALC (automatic level
control), frequency-modulated oscillators, and
linear output buffers to drive the external
transistors. The sinusoidal carriers facilitate the
filtering and allow high performance audio
transmission.
The VOX (voice operated transmit) circuitry
disables the output buffer when there is no audio
signal to save battery power. For MONO
applications, the STANDBY pin enables one
transmitter only, reducing the supply current.
The TSH512 forms a chipset with the dual
receiver TSH511.
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+
-+
-
TSH512
Monostable
ALC
ALC
VCO
VCO
Output
buffer
Output
buffer
TX1
TX2
LNA
LNA
VOX
-
+
PEA
PEA
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--+
-
+
-
TSH512
Monostable
ALC
ALC
VCO
VCO
Output
buffer
Output
buffer
TX1
TX2
LNA
LNA
VOX
-
+
PEA
PEA
Pin connections (top view)
F
TQFP44
10 x 10 mm
www.st.com


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