saa5244a NXP Semiconductors, saa5244a Datasheet - Page 5

• Manufacturer Part Number: saa5244a
• Description: Integrated Teletext Decoder Ivt1.1
• Manufacturer: NXP Semiconductors

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