SAA5244A Datasheet, PDF (5/32 Pages) NXP Semiconductors – Integrated VIP and teletext decoder IVT1.1

Philips Semiconductors
Integrated VIP and teletext decoder
(IVT1.1)
Product specification
SAA5244A
PINNING
SYMBOL
V_DD
OSCOUT
OSCIN
OSCGND
V_SS
REF−
REF+
BLACK
CVBS
IREF
V_DD
POL
STTV/LFB
VCR/FFB
V_SS
R
G
B
RGBREF
BLAN
V_SS
COR
ODD/EVEN
Y
SCL
SDA
n.c.
i.c.
SOT129 SOT205A
DESCRIPTION
1
18
+5 V supply
2
19
27 MHz crystal oscillator output
3
20
27 MHz crystal oscillator input
4
21
0 V crystal oscillator ground
5
22
0 V ground
−
−
negative reference voltage for the ADC. The pin should be connected to 0 V
6
23
positive reference voltage for the ADC. The pin should be connected to +5 V
7
24
video black level storage pin, connected to ground via a 100 nF capacitor
8
25
composite video input pin. A positive-going 1 V (peak-to-peak) input is required,
connected via a 100 nF capacitor
9
26
reference current input pin, connected to ground via a 27 kΩ resistor
10
27
+5 V supply
11
28
STTV/LFB/FFB polarity selection pin
12
29
sync to TV output pin/line flyback input pin. Function controlled by an internal
register bit (scan sync mode)
13
32
PLL time constant switch/field flyback input pin. Function controlled by an
internal register bit (scan sync mode)
14
33
0 V ground
15
34
dot rate character output of the RED colour information
16
35
dot rate character output of the GREEN colour information
17
36
dot rate character output of the BLUE colour information
18
37
input DC voltage to define the output high level on the RGB pins
19
38
dot rate fast blanking output
20
39
0 V ground
21
40
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
22
41
25 Hz output synchronized with the CVBS input’s field sync pulses to produce a
non-interlaced display by adjustment of the vertical deflection currents
23
42
24
43
25
44
dot rate character output of teletext foreground colour information open drain
output
serial clock input for the I²C-bus. It can still be driven during power-down of the
device
serial data port for the I²C-bus; open drain output. It can still be driven during
power-down of the device
−
4 to 7
not connected
30, 31
26 to 40 1 to 3
8 to 17
internally connected. Must be left open-circuit in application
March 1992
5