Philips Semiconductors
10-page intelligent teletext decoders
Product specification
SAA5261; SAA5262; SAA5263
SYMBOL PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
CRYSTAL SPECIFICATION: note 2
fxtal
nominal frequency
−
CL
load capacitance
−
C1
series capacitance Tamb = 25 °C
−
C0
parallel capacitance Tamb = 25 °C
−
Rres
resonance resistance Tamb = 25 °C
−
Txtal
temperature range
−20
Xj
adjustment tolerance Tamb = 25 °C
−
Xd
drift
−
12
32
18.5
4.9
35
+25
−
−
−
−
−
−
−
+70
±50 × 10−6
±30 × 10−6
MHz
pF
fF
pF
Ω
°C
Notes
1. All RGB current is sourced from the RGBREF pin. The maximum effective series resistance between RGBREF and
the R, G and B pins is 150 Ω.
2. Crystal order number 4322 143 05561.
TIMING CHARACTERISTICS
SYMBOL
PARAMETER
INPUT
OUTPUT
I2C-BUS SPECIFICATION
SCL timing
tHD;STA
tLOW
tHIGH
tr(SCL)
tf(SCL)
START condition hold time
SCL LOW time
SCL HIGH time
SCL rise time
SCL fall time
≥4.0 µs
≥4.7 µs
≥4.0 µs
≤1.0 µs
≤0.3 µs
note 1
note 1
≥4.0 µs; note 2
note 3
≤0.3 µs; note 4
≥4.0 µs
≥4.7 µs
≥4.0 µs
≤1.0 µs
≤0.3 µs
SDA timing
tSU;DAT1
tHD;DAT
tSU;STA
tSU;STO
tBUF
tr(SDA)
tf(SDA)
data set-up time
data hold time
repeated START set-up time
STOP condition set-up time
bus free time
SDA rise time
SDA fall time
≥250 ns
≥0 ns
≥4.7 µs
≥4.0 µs
≥4.7 µs
≤1.0 µs
≤0.3 µs
note 1
note 1
note 1
note 1
note 1
note 3
≤0.3 µs; note 4
≥250 ns
≥0 ns
≥4.7 µs
≥4.0 µs
≥4.7 µs
≤1.0 µs
≤0.3 µs
Notes
1. This parameter is determined by the user software. It must comply with the I2C-bus specification.
2. This value gives the auto-clock pulse length which meets the I2C-bus specification for the special crystal frequency.
Alternative, the SCL pulse must be timed by software.
3. The rise time is determined by the external bus line capacitance and pull-up resistor. It must be less than 1 µs.
4. The maximum capacitance on bus lines SDA and SCL is 400 pF.
1998 Apr 22
20