參數(shù)資料
型號: TDA938X
廠商: NXP Semiconductors N.V.
英文描述: TV signal processor-Teletext decoder with embedded m-Controller
中文描述: 電視信號處理器與嵌入式米圖文電視解碼器控制器
文件頁數(shù): 103/140頁
文件大?。?/td> 570K
代理商: TDA938X
1999 Sep 28
103
Philips Semiconductors
Preliminary Device Specification
TV signal processor-Teletext decoder with
embedded
μ
-Controller
TDA935X/6X/8X series
Note
1.
2.
Peripheral current is dependent on external components and voltage levels on I/Os
The simplified circuit diagram of the oscillator is given in Fig.42.
A suitable crystal for this oscillator is the Saronix type 9922 520 00169. The nominal tuning of the crystal is important
to obtain a symmetrical catching range for the PLL in the colour decoder. This tuning can be adapted by means of
the values of the capacitors C
x1
and C
x2
in Fig.42. Good results were obtained with capacitor values of 39 pF,
however, for a new application the optimum value should be determined by checking the symmetry of the catching
range of the colour decoder.
P0.5
AND
P0.6
IO.2.1
IO.2.2
IO.2.3
low level input voltage
high level input voltage
hysteresis of Schmitt Trigger
input
low level output voltage
high level output voltage
high level output voltage
output rise time (push-pull only)
10% to 90%
output fall time 10% to 90%
load capacitance
capacitance of input pin
2.0
0.4
0.8
5.5
0.7
V
V
V
IO.2.4
IO.2.5
IO.2.6
IO.2.7
I
OL
= 8mA
open drain
I
OH
= 8mA
load 100 pF
2.4
16
0.4
5.5
V
V
V
ns
IO.2.8
IO.2.9
IO.2.10
load 100pF
14
100
10
ns
pF
pF
P1.6
AND
P1.7
IO.3.1
IO.3.2
IO.3.3
low level input voltage
(V
IL
)
high level input voltage
(V
IH
)
hysteresis of Schmitt-trigger
input
low level output voltage
high level output voltage
output fall time (V
IH
to V
IL
for C
L
)
3.0
0.2
1.5
5.5
V
V
V
IO.3.4
IO.3.5
IO.3.6
sink current 8mA
open drain
0
20+0.1
×
C
L
10
0.4
5.5
250
V
V
ns
IO.3.7
IO.3.8
bus load capacitance
capacitance of IO pin
400
10
pF
pF
Crystal oscillator
OSCIN
;
NOTE
2
X.1.1
X.1.2
X.1.3
X.1.4
X.1.5
resonator frequency
input capacitance (C
i
)
output capacitance (C
o
)
C
x1
= C
x2
R
i
(crystal)
12
12
4.1
2.9
56
100
MHz
pF
pF
pF
NUMBER
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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