SAA5281 Datasheet, PDF (4/48 Pages) NXP Semiconductors – Integrated Video input processor and Teletext decoder IVT1.8

Philips Semiconductors
Integrated Video input processor and
Teletext decoder (IVT1.8*)
Preliminary specification
SAA5281
PINNING
SYMBOL
V_DD1
OSCOUT
OSCIN
OSCGND
V_SS1
REF+
BLACK
CVBS
IREF
V_DD2
POL
STTV/LFB
VCR/FFB
V_SS2
R
G
B
RGBREF
BLAN
COR
ODD/EVEN
(or DV)
Y
SCL
SDA
V_SS3
PIN
SOT240-1 SOT247-1 SOT319-2
DESCRIPTION
1
52
11
+5 V supply 1
2
1
13 27 MHz crystal oscillator output
3
2
14 27 MHz crystal oscillator input
4
3
15 0 V crystal oscillator ground
5
4 and 5
16 0 V ground
6
6
18 positive reference voltage for ADC; this pin should be connected
to ground via a 100 nF capacitor
7
8
19 video black level storage input/output; this pin should be
connected to ground via a 100 nF capacitor
8
9
20 composite video input; a positive-going 1 V (peak-to-peak) input
is required, connected via a 100 nF capacitor
9
10
21
reference current input, connected to ground via a 27 kΩ resistor
10
11
22 +5 V supply 2
11
12
23 STTV/LFB/FFB polarity selection input
12
13
24 sync to TV output line flyback input; function controlled by an
internal register bit (scan sync mode)
13
14
27 PLL time constant switch/field input; function controlled by an
internal register bit (scan sync mode)
14
15
28
0 V ground; connected to V_SS1 for normal operation
15
16
30 dot rate character output of the RED colour information
16
17
32 dot rate character output of the GREEN colour information
17
18
33 dot rate character output of the BLUE colour information
18
19
34 input DC voltage to define the output high level on the RGB pins
19
20
35 dot rate fast blanking output
20
21
36 programmable output to provide contrast reduction of the TV
picture for mixed text and picture displays or when viewing
newsflash/subtitle pages;
open-drain output
21
22
37 in ODD/EVEN mode a 25 Hz output synchronized with the CVBS
input field sync pulses to produce a non-interlaced display by
adjustment of the vertical deflection currents; in DV mode a VPT
data valid signal is used to indicate reception of error-free VPS or
8/30 format 2 data
22
23
38 dot rate character output of teletext foreground colour information;
open-drain output
23
24
39
serial clock input for I²C-bus; it can still be driven HIGH during
power-down of the device
24
25
40
serial data port for the I²C-bus, open-drain output; it can still be
driven HIGH during power-down of the device
25
26
44 0 V ground
1996 Nov 04
4