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TSH512CSTN/a1700avaiHiFi stereo/mono infrared transmitter Stereo sub-carrier generator


TSH512C ,HiFi stereo/mono infrared transmitter Stereo sub-carrier generatorABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit1)Vcc 7VSupply voltageToper Operating free ..
TSH512CF ,HIFI STEREO/MONO INFRARED TRANSMITTER STEREO SUB-CARRIER GENERATORAPPLICATIONS6 6 28 28VO VOX X■ Infrared HiFi stereo transmitter■ Infrared Headsets7 7 + + + M Monos ..
TSH512CFT ,HIFI STEREO/MONO INFRARED TRANSMITTER STEREO SUB-CARRIER GENERATORTSH51 TSH512 2H HiiFi Fi s stter ereo/ eo/m mo ono no i in nfr frar ared ed tra tran nsm smiitte tt ..
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TSH512C
HiFi stereo/mono infrared transmitter Stereo sub-carrier generator
TSH512
HiFi stereo/mono infrared transmitter
Stereo sub-carrier generator Supply voltage: 2.3V to 5.5V� Carriers 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 2 Standby for mono operation
DESCRIPTION

The TSH512 is a 0.4 to 11 MHz dual FM transmit-
ter. Access pins to each section give a high versa-
tility and allow several applications: stereo head-
phone, multimedia headset, audio sub-carrier
generator.
The TSH512 integrates in one chip:
Low-noise audio preamplifiers with ALC (Automat-
ic Level Control), frequency modulated oscillators,
and linear output buffers to drive external transis-
tors. The sinusoidal carriers facilitates the filtering
and allows high performance audio transmission.
The VOX (Voice Operated Transmit) circuitry dis-
ables the output buffer when there is no audio to
save battery power.
For MONO applications, the STAND-BY pin en-
ables one transmitter only, reducing the supply
current.
The TSH512 forms a chipset with the dual receiv-
er TSH511.
APPLICATIONS
Infrared HiFi stereo transmitter� Infrared Headsets� Stereo sub-carrier for video transmitters� Voice operated wireless webcams� FM IF transmit systems
ORDER CODE
PACKAGE
PIN CONNECTION (top view)
TSH512

HiFi stereo/mono infrared transmitter
Stereo sub-carrier generator
TSH512
ABSOLUTE MAXIMUM RATINGS
OPERATING CONDITIONS
BLOC DIAGRAM
All voltages values, except differential voltage, are with respect to network ground terminal Corporate ST Microelectronics procedure number 0018695 ElectroStatic Discharge pulse (ESD pulse) simulating a human body discharge of 100 pF through 1.5kΩ Discharge to Ground of a device that has been previously charged. ElectroStatic Discharge pulse (ESD pulse) approximating a pulse of a machine or mechanical equipment.
TSH512
PIN DESCRIPTION
pin direction: I = input pin, O = output pin, - = pin to connect to supply or decoupling capacitors or external components
TSH512
TYPICAL SCHEMATIC

Stereo infrared transmitter
TSH512
INFRARED STEREO TRANSMITTER APPLICATION (ie: stereo headphone)

The HiFi stereo audio is amplified and level regulated by ALC. The carrier of each transmitter TX1 or TX2
of the TSH512 is modulated in FM and bufferized to attack the LED final stage.
SUB-CARRIER GENERATOR APPLICATION: voice operated wireless camera

Thanks to the operating frequency the TSH512 offers the possibility to generate usual audio sub-carriers
for video applications. The camera can be voice activated using the VOX-MUTE output of the TSH512.
The TSH512 also provides bias, amplification, ALC for the electret microphone.
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