tda3508 NXP Semiconductors, tda3508 Datasheet - Page 2

• Manufacturer Part Number: tda3508
• Description: Video Control Combination Circuit With Automatic Cut-off Control
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
1996 Oct 25
TDA3508
Capacitive coupling of the colour difference and
luminance input signals with black level clamping in the
input stages
Linear saturation control acting on the colour difference
signals
(G Y) and RGB matrix
Linear transmission of inserted signals
Equal black levels for inserted and matrixed signals
Three identical channels for the RGB signals
Linear contrast and brightness controls, operating on
both the inserted and matrixed RGB signals
Peak beam current limiting input
Clamping, horizontal and vertical blanking of the three
input signals controlled by a 3-level sandcastle pulse
Three DC gain controls for the RGB output signals
(white point adjustment)
Emitter-follower outputs for driving the RGB output
stages
Input for automatic cut-off control with compensation for
leakage current of the picture tube.
Video control combination circuit with
automatic cut-off control
NUMBER
TYPE
NAME
DIP28
plastic dual in-line package; 28 leads (600 mil)
DESCRIPTION
2
GENERAL DESCRIPTION
The TDA3508 is an integrated circuit which performs video
control functions in a PAL/SECAM decoder for negative
colour difference signals (R Y) and (B Y).
The required input signals are luminance and colour
difference and a 3-level sandcastle pulse for control
purposes. Linear RGB signals can be inserted from an
external source. RGB output signals are available for
driving the video output stages. The circuit provides
automatic cut-off control of the picture tube.
PACKAGE
Product specification
TDA3508
VERSION
SOT117-1