SAA7185 データシートの表示（PDF） - Philips Electronics
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SAA7185 Datasheet PDF : 36 Pages
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Philips Semiconductors
Digital Video Encoder (DENC2)
Preliminary specification
SAA7185
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
• I2C-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.
GENERAL DESCRIPTION
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.
QUICK REFERENCE DATA
SYMBOL
VDDA
VDDD
IDDA
IDDD
Vi
Vo(p-p)
RL
ILE
DLE
Tamb
PARAMETER
MIN. TYP. MAX.
analog supply voltage
4.75 5.0
5.25
digital supply voltage
analog supply current
digital supply current
4.5
5.0
5.5
−
50
55
−
140
170
input signal voltage levels
analog output signal voltages Y, C and CVBS without load −
(peak-to-peak value)
load resistance
80
LF integral linearity error
−
LF differential linearity error
−
operating ambient temperature
0
TTL compatible
2
−
−
−
−
±2
−
±1
−
+70
UNIT
V
V
mA
mA
V
Ω
LSB
LSB
°C
1996 Jul 08
2
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