TDA8501 Datasheet, PDF (2/30 Pages) NXP Semiconductors – PAL/NTSC encoder

Philips Semiconductors
PAL/NTSC encoder
Preliminary specification
TDA8501
FEATURES
• Two input stages: R, G, B and −(R−Y), −(B−Y), Y with
multiplexing
• Chrominance processing, highly integrated, includes
low frequency filters for the colour difference signals,
and after the modulator a bandpass filter
• Fully controlled modulator produces a signal according
to the PAL or NTSC standard without adjustments
• A free running oscillator. Can be tuned by crystal or by
an external frequency source
• Output stages with separated Y + SYNC and
chrominance (Y + C, SVHS), and a CVBS output. Signal
amplitudes are correct for 75 Ω driving via an external
emitter follower. Internal generation of NTSC setup
• Sync separator circuit and pulse shaper, to generate the
required pulses for the processing, clamping, blanking,
FH/2, and burst pulse
• H/2 control pin. In PAL mode the internally generated
H/2 is connected to this pin and the phase of this signal
can be reset
• Internal bandgap reference.
GENERAL DESCRIPTION
The TDA8501 is a highly integrated PAL/NTSC encoder IC
which is designed for use in all applications where R, G
and B or Y, U and V signals require transformation to PAL
or NTSC values.The specification of the input signals are
fully compatible with the specification of those of the
TDA8505 SECAM-encoder.
ORDERING INFORMATION
EXTENDED TYPE
NUMBER
TDA8501
TDA8501T
PINS
24
24
Note
1. SOT234-1; 1996 December 2.
2. SOT137-1; 1996 December 2.
PACKAGE
PIN POSITION
MATERIAL
DIL
plastic
SO
plastic
CODE
SOT234AH2⁽¹⁾
SOT137AH1⁽²⁾
April 1993
2