TDA8505 datasheet(2/32 Pages) PHILIPS

2 / 32 page

July 1994

Philips Semiconductors

Preliminary speciﬁcation

SECAM encoder

TDA8505

FEATURES

• Two input stages, R, G, B and Y, −(R−Y), −(B−Y) with

multiplexing.

• Chrominance processing, highly integrated, includes

vertical identification, low frequency pre-emphasis and

high frequency pre-emphasis (anti-Cloche) and

bandpass filter.

• Fully controlled FM modulator which produces a signal

in accordance with the SECAM standard without

adjustments.

• Two reference oscillators, one for D'R f0 (4.40625 MHz)

and one for D'B f0 (4.250 MHz). These oscillators are

tuned by PLL loop with the frequency of the line sync as

reference. Crystal tuning, or tuning by external

reference source, of the reference oscillators is

possible.

• Output stages, CVBS and separated Y + SYNC and

CHROMA. For CVBS output, signal amplitude 2 V (p

−p)

nominal, thus only an external emitter follower is

required for 75

Ω driving.

• Sync separator circuit and pulse shaper, to generate the

required pulses for the processing, line, frame, FH/2 and

chrominance blanking.

• A 3-level sandcastle pulse is generated for PAL/NTSC

to SECAM transcoding.

• FH/2 input for locking with another decoder.

• Colour killing on the internal colour difference signals.

• Internal bandgap reference.

GENERAL DESCRIPTION

The TDA8505 is a highly integrated SECAM encoding IC

that is designed for use in all applications that require

transformation of R, G and B signals or Y, U and V signals

to a standard SECAM signal.

The specification of the input signals is fully compatible

with those of the TDA8501 PAL/NTSC encoder.

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

PINS

PIN POSITION

MATERIAL

CODE

TDA8505

SDIP32

plastic

SOT232-1

TDA8505 Datasheet(PDF) 2 Page - NXP Semiconductors

TDA8505 Datasheet(HTML) 2 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Datasheet Download

Link URL