1997 Jul 01
2
Philips Semiconductors
Preliminary specication
I2C-bus controlled economy PAL/NTSC
and NTSC TV-processors
TDA837x family
FEATURES
Available in all ICs:
Vision IF amplifier with high sensitivity and good figures
for differential phase and gain
PLL demodulator for the IF signal
Alignment-free sound demodulator
Flexible source selection with a CVBS input for the
internal signal and Y/C or CVBS input for the external
signal
Audio switch
The output signal of the CVBS (Y/C) switch is externally
available
Integrated chrominance trap and band-pass filters
(auto-calibrated)
Luminance delay line integrated
A symmetrical peaking circuit in the luminance channel
Black stretching of non-standard CVBS or luminance
signals
RGB control circuit with black current stabilization and
white point adjustment
Linear RGB inputs and fast blanking
Horizontal synchronization with two control loops and
alignment-free horizontal oscillator
Slow start and slow stop of the horizontal drive pulses
Vertical count-down circuit
Vertical driver optimized for DC-coupled vertical output
stages
I2C-bus control of various functions
Low dissipation
Small amount of peripheral components compared with
competition ICs.
GENERAL DESCRIPTION
The various versions of the TDA837x series are I2C-bus
controlled single-chip TV processors which are intended to
be applied in PAL/NTSC (TDA8374 and TDA8375) and
NTSC (TDA8373 and TDA8377) television receivers.
All ICs are available in an SDIP56 package and some
versions are also available in a QFP64 package. The ICs
are pin compatible so that with one application board
NTSC and PAL/NTSC (or multistandard together with the
SECAM decoder TDA8395) receivers can be built.
Functionally this IC series is split in to 2 categories:
Versions intended to be used in economy TV receivers
with all basic functions
Versions with additional functions such as E-W
geometry control, horizontal and vertical zoom function
and YUV interface which are intended for TV receivers
with 110
° picture tubes.
The various type numbers are given in Table 1.
The detailed differences between the various ICs are
given in Table 2.
Table 1
TV receiver versions
TV RECEIVERS
SDIP56 PACKAGE
QFP64 PACKAGE
ECONOMY
MID/HIGH END
ECONOMY
MID/HIGH END
PAL only
TDA8374B
TDA8374BH
PAL/NTSC (SECAM)
TDA8374 and TDA8374A
TDA8375 and TDA8375A
TDA8374AH
TDA8375AH
NTSC
TDA8373
TDA8377 and TDA8377A