NTE NTE1835 Integrated circuit interface for character and pattern Datasheet

NTE1835
Integrated Circuit
Interface for Character and Pattern
Description:
The NTE1835 is an integrated circuit designed for interface of decoder outputs or of external analog
input signal in teletext system with the color output.
Features:
D Provides Analog Signal Processing for Character Signal Input
D High Speed Switching:
Rise and Fall Time: 35ns
Delay time: 20ns
D Including DC Controller of Brightness, Contrast, R–Adjustment and B–Adjustment for Character
Signal Input
D Y Amplifier Linear Area’s Bottom: 2.0V
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V
Circuit Voltage
V1–13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0/14.4V
V3,6,7,8,9–13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0/V1–13–1V
V11–13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2/(V1–13)–1
V15,18,21–13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0/(V1–13)V
Circuit Current
I10, 14, 17, 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30/10mA
I16,19,22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1/3mA
Power Dissipation (TA = +70°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1040mW
Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Electrical Characteristics: (TA = +25°C, VCC = 12V unless otherwise specified)
Parameter
Total Circuit Current
Circuit Voltage
Symbol
Test Conditions
Min
Typ
Max
Unit
Itot
VCC = 12V
32
47
62
mA
V10,14,
17,20–13
VCC = 12V
7.7
8.0
8.3
V
3.0
3.5
4.0
V
V16,19,
22–13
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12V unless otherwise specified)
Parameter
TV Signal Voltage Amp.
Relative Voltage Amp AV1
TV Signal Frequency Characteristics
Character Signal Voltage Amp
Symbol
Test Conditions
Min
Typ
Max
Unit
AV1
f = 500kHz, Sine Wave signal 1Vp–p
0.95
0.98
1.00
times
∆AV1
f = 500kHz, Sine Wave signal 1Vp–p
0.95
1.00
1.05
times
Sine wave signal 1Vp–p,
Frequency in which AV1
becomes –3dB
20
–
–
MHz
Character Input 1Vp–p, Contrast max.
3.0
3.4
3.8
times
fV
AV2
AV2 Relative Voltage Amp.
∆AV2
Character Input 1Vp–p,
Relative output voltage
0.85
1.00
1.15
times
Character Signal Contrast Ratio
∆eo
Contrast max./min.
3.0
3.5
4.0
times
Character Signal Rise/Fall Time
tr(TX),
tf(TX)
V3 = V9 = 6V
–
35
60
ns
Character Signal Rise Delay Time
td–r(TX)
V3 = V9 = 6V
–
25
60
ns
Character Signal Fall Delay Time
td–f(TX)
V3 = V9 = 6V
–
30
60
ns
Character Signal tdr, tdf 3–channel
Mutual Difference
∆td(TX)
V3 = V9 = 6V
–
–
20
ns
TX–TV Changeover Rise Delay Time
td–r(TX/TV) V3 = V9 = 6V
–
60
80
ns
TX–TV Changeover Fall Delay Time
td–f(TX/TV) V3 = V9 = 6V
–
50
70
ns
TX–TV Changeover tdr, tdf
Mutal Difference
∆td(TX/TV)
–
–
20
ns
TX–TV Discrimination Level
Vt(TX/TV)
0.50
0.65
0.70
V
Crosstalk between TV
Signal Channels
CTTV
40
45
–
dB
Crosstalk between Character
Signal Channels
CTTX
40
45
–
dB
TV–to–Character Changeover
Crosstalk
CTTX/TV
40
45
–
dB
Pedestal Deflection of Character
Signal Contrast Change
∆ETP–C
–
0
±150
mV
2.0
–
10.5
V
0
–
6.0
V
TV Signal Input DC Level Standard
TV1
TX–TV Signal Input Level Standard
TX/TV1
V3 = V9 = 6V
Brightness typ., Contrast Min to Max
TV input signal level (R–Y) TV,
(G–Y) TV, (B–Y) TV, YTV
Pin Connection Diagram
VCC 1
Pedestal Clamp Filter 2
22 RTX Input
21 (R – Y)TV Input
Contrast Control 3
20 R Output
Blanking Pulse Input 4
19 GTX Input
Shadow Input 5
Clamp Pulse Input 6
RTX Adjust 7
RTX Adjust 8
Brightness Control 9
Y Output 10
YTV Input 11
22
18 (G – Y)TV Input
17 G Output
16 BTX Input
15 (B – Y)TV Input
14 B Output
13 GND
12 TX/TV Change Input
12
.410
(11.41)
1
11
.400 (10.16)
1.300 (33.0)
.216
(5.5)
.100 (2.54)
1.000 (25.4)
.110 (2.79)
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