saa5254 NXP Semiconductors, saa5254 Datasheet - Page 4

• Manufacturer Part Number: saa5254
• Description: Integrated Vip And Teletext Decoder Ivt1.1x
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PINNING
1996 Nov 07
V
OSCOUT
OSCIN
OSCGND
V
REF+
BLACK
CVBS
IREF
V
POL
STTV/LFB
VCR/FFB
V
R
G
B
RGBREF
BLAN
V
COR
ODD/EVEN
Y
SCL
SDA
i.c.
DD1
SS1
DD2
SS2
SS3
Integrated VIP and teletext decoder
(IVT1.1X)
SYMBOL
26 to 40
PIN
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
2
3
4
5
6
7
8
9
+5 V supply 1
27 MHz crystal oscillator output
27 MHz crystal oscillator input
0 V crystal oscillator ground
0 V ground 1
Positive reference voltage for the ADC. This 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 2
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 2
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.
DC input voltage to define the output high level on the RGB pins.
Dot rate fast blanking output.
0 V ground 3
Programmable active LOW 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 inputs 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
Serial input/output data port for the I
power-down of the device.
Internally connected. Must be left open-circuit in application.
2
C-bus. It can still be driven during power-down of the device.
4
2
C-bus; open drain output. It can still be driven during
DESCRIPTION
Preliminary specification
SAA5254