Philips Semiconductors
Preliminary specification
Digital Video Encoder (DENC2)
FEATURES
•
CMOS 5 V device
•
Digital PAL/NTSC encoder
•
System pixel frequency 13.5 MHz
•
Accepts MPEG decoded data
•
8-bit wide MPEG port
•
Input data format Cb, Y, Cr etc. (CCIR 656)
•
16-bit wide YUV input port
•
I
2
C-bus control or alternatively MPU parallel control port
•
Encoder can be master or slave
•
Programmable horizontal and vertical input
synchronization phase
•
Programmable horizontal sync output phase
•
OSD overlay with Look-Up Tables (LUTs) 8
×
3 bytes
•
Colour bar generator
•
Line 21 Closed Caption encoder
•
Cross-colour reduction
•
DACs operating at 27 MHz with 10-bit resolution
•
Controlled rise/fall times of output syncs and blanking
•
Down-mode of DACs
•
CVBS and S-Video output simultaneously
•
PLCC68 package.
QUICK REFERENCE DATA
SYMBOL
V
DDA
V
DDD
I
DDA
I
DDD
V
i
V
o(p-p)
R
L
ILE
DLE
T
amb
analog supply voltage
digital supply voltage
analog supply current
digital supply current
input signal voltage levels
analog output signal voltages Y, C and CVBS without load
−
(peak-to-peak value)
load resistance
LF integral linearity error
LF differential linearity error
operating ambient temperature
80
−
−
0
PARAMETER
MIN.
4.75
4.5
−
−
TYP.
5.0
5.0
50
140
2
−
−
−
−
GENERAL DESCRIPTION
SAA7185
The SAA7185 encodes digital YUV video data to an
NTSC, PAL CVBS or S-Video signal.
The circuit accepts CCIR compatible YUV data with
720 active pixels per line in 4 : 2 : 2 multiplexed formats,
for example MPEG decoded data. It includes a sync/clock
generator and on-chip Digital-to-Analog Converters
(DACs).
The circuit is compatible to the DIG-TV2 chip family.
MAX.
5.25
5.5
55
170
−
−
±2
±1
+70
V
V
UNIT
mA
mA
V
Ω
LSB
LSB
°C
TTL compatible
1996 Jul 08
2
PHILIPS [ NXP SEMICONDUCTORS ]
