TSH512
HiFi stereo/mono infrared transmitter
Stereo sub-carrier generator
s
s
s
s
s
s
s
s
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
PACKAGE
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
F
TQFP44
10 x 10 mm
PIN CONNECTION
(top view)
44
43
42
41
40
39
38
37
36
35
34
1
PEA
ALC
VCO
33
32
3
LNA
4
5
6
7
8
LNA
9
10
11
TSH512
VOX
+
-
Monostable
s
s
s
s
s
Infrared HiFi stereo transmitter
Infrared Headsets
Stereo sub-carrier for video transmitters
Voice operated wireless webcams
FM IF transmit systems
+
-
ALC
ORDER CODE
Part Number
TSH512CF
TSH512CFT
Temperature
Range
-40°C to
+85°C
-40°C to
+85°C
Package
TQFP44
TQFP44
Conditionning
Tray
Tape & reel
Marking
TSH512C
TSH512C
12
13
14
15
16
December 2002
-
+
2
-
-
-
+
TX2
Output
buffer
31
30
29
28
27
26
TX1
+
-
PEA
Output
buffer
25
24
23
VCO
17
18
19
20
21
22
1/19
STMICROELECTRONICS [ STMICROELECTRONICS ]
