TSH512 Datasheet, PDF (1/19 Pages) STMicroelectronics – HiFi stereo/mono infrared transmitter Stereo sub-carrier generator

TSH512
HiFi stereo/mono infrared transmitter
Stereo sub-carrier generator
s Supply voltage: 2.3V to 5.5V
s Carriers frequency range: 0.4 to 11 MHz
s High versatility: I/O pins for each section
s Two FM transmitters for stereo
s Sinusoidal carriers for high spectral purity
s Micro or line level preamplifiers with ALC
s VOX function to save on battery power
s 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
s Infrared HiFi stereo transmitter
s Infrared Headsets
s Stereo sub-carrier for video transmitters
s Voice operated wireless webcams
s FM IF transmit systems
ORDER CODE
Part Number
Temperature
Range
TSH512CF
TSH512CFT
-40°C to
+85°C
-40°C to
+85°C
Package
TQFP44
TQFP44
Conditionning Marking
Tray
TSH512C
Tape & reel TSH512C
PACKAGE
F
TQFP44
10 x 10 mm
PIN CONNECTION (top view)
44 43 42 41 40 39 38 37 36 35 34
1
VCO
33
PEA
2
32
ALC
3
TX2 Output
31
LNA
buffer
4
TSH512
30
5
29
6
VOX
28
7
+
-
Monostable 27
8
26
LNA
9
+
Output
TX1 buffer
25
-
ALC
+
10
-
24
PEA
11
23
VCO
12 13 14 15 16 17 18 19 20 21 22
December 2002
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