Philips Semiconductors
Chinese Character System Teletext
(CCST) decoder
Preliminary specification
SAA5700
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
STTV
VSTTV
VSTTV(DC)
IO(drive)
VCS, TCS amplitude
nominal DC voltage
output drive
R, G AND B
IOL
LOW-level output current (black
level)
IOH
HIGH-level output current
(full intensity)
VDDX = 5 V
RL
load resistance to VSSO for nominal
1 V(p-p) output
CL
load capacitance
to(r)
output rise time
10% to 90%
to(f)
output fall time
90% to 10%
BLAN (VDS)
VOH
HIGH-level output voltage
IOH = −2 mA
VOL
LOW-level output voltage
IOL = 2 mA
CL
load capacitance
to(r)
output rise time
10% to 90%
to(f)
output fall time
90% to 10%
tSK
skew delay between outputs R,G,B
and BLAN
0.2
0.3
1.85
2.0
−
−
−10
−
5.1
6.0
−
160
−
−
−
−
−
−
VDD − 0.25 −
0
−
−
−
−
−
−
−
−
−
0.4
V
2.15
V
3
mA
+10
µA
6.9
mA
−
Ω
20
pF
15
ns
15
ns
VDD
V
0.2
V
50
pF
15
ns
15
ns
15
ns
Notes
1. This current is the maximum allowed into the inputs when line and field flyback signals are connected to these inputs.
An external series resistor must be used to limit the input currents to 1 mA.
2. Measured from VIL(max) to VIH(min).
3. Measured from VIH(min) to VIL(max).
1997 May 16
13