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NTE7086
Integrated Circuit
Sync Deflection Circuit for CRT Display
Description:
The NTE7086 is a syncdeflection circuit IC in a 20–Lead DIP type package dedicated to CRT display
use. This device can be connected to the NTE1773/NTE1797 (for vertical output use) to form a
syncdeflection circuit that meets every requirement for CRT display use.
So far, IC’s for color TV use have been applied to the syncdeflection circuit for CRT display use and
general–purpose IC’s such as one–shot multivibrators, inverters, and a lot of transistors have been
used to form the peripherals such as the sync input interface and horizontal phase shifter.
The NTE7086 contains these peripherals on chip and adopts a stable circuit for horizontal oscillation
from 15kHz to 100kHz aiming at improving the characteristics required for CRT display use.
Features:
D The Horizontal Oscillation Frequency can be Adjusted Stably from 15kHz to 100kHz.
D The Horizontal Display can be Shifted Right/Left.
D The Horizontal/Vertical Sync Input can be used intact Regardless of the Difference in Pulse
Polarity and Pulse Width.
D The AFC Feedback Sawtooth Wave can be Obtained by Simply Applying a Flyback Pulse to
the IC as a Trigger Pulse.
D Any Duty of the Horizontal Pulse Can be Set.
D Good Linearity because DC Bias at Vertical Output Stage is Subjected to Sampling Control
within Retrace Time.
On–Chip Functions:
Horizontal Block
D AFC
D Horizontal OSC
D X–Ray Protector
D Horizontal Phase Shifter
D AFC Sawtooth Wave Generator
D Horizontal Pulse Duty Setting
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage, V10max, V20max 14V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Power Dissipation (TA ≤ +65°C), PDmax 780mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
Storage Temperature Range, T
opr
stg
Vertical Block
D Vertical OSC
D Vertical Sawtooth Wave Generator
D Sampling Type DC Voltage Control
–20° to +85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–55° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Operating Voltage Range, V10opr, V20opr 9.0V to 13.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Supply Voltage, V10, V
20
12V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics:
(TA = +25°C, VCC10 = VCC20 = 12V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Current Dissipation I
Vertical Frequency Pull–In Range V
Vertical Free–Running Frequency
with Increased/Reduced Voltage
Characteristic of Vertical Frequency
10
I
20
p–in
fv fV center 55Hz 50 – 60 Hz
∆f
VCC10 12 – 30 mA
VCC20 5 – 12 mA
Vertical Sync 60Hz 10 – 12 Hz
V20 = 12V ±1V –0.5 – 0.5 Hz
Vv
55Hz at 12V 3.8 – 4.4 V
Middle–Point Voltage Control
Threshold Level
Vertical OSC Start Voltage – – 4.0 V
Temperature Coefficient of Amplitude
Frequency
Vertical Driver Amplification Factor (VGV)
I
AFC
TA = –10° to +60°C –0.028 – 0.028 Hz/°C
12 – 18 dB
±1.0 – ±1.9 mA
with Horizontal AFC Loop Current
Horizontal Free–Running Frequency f
Horizontal OSC Start Voltage
with Increased/Reduced Voltage
Characteristic od Horizontal Frequency
with Temperature Characteristic of
∆f
fH center 15.734kHz –750 – 750 Hz
H
– – 4 V
V10 = 12V ±1V –50 – 50 Hz
Hv
15.735kHz at 12V,
–2.9 – 2.9 Hz/°C
TA = –10° to +60°C
Horizontal Frequency
Comparison Wave Generation Input V
Operating Voltage
Holddown Operation Start Voltage V
Horizontal Drive Current I
12
13
4
0.6 – 0.9 V
0.5 – 0.8 V
6.0 – 12.0 mA
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Pin Connection Diagram
Horiz Trigger Input
Phase Adjust Time
Constant
Sync Pulse Width
Time Constant
FBP Trigger Input
Sawtooth Wave
Generating Cap
Comparison Voltage
Generating Cap
AFC Output
Horiz OSC Time
Constant
Discharge Resistor
Horiz Power Supply
1
2
3
4
5
6
7
8
10 11
20 11
Vert Power Supply
20
Vert Trigger Input
19
Vert OSC Time
18
Constant
Middle–Point V oltage
17
Control Point
Vert Sawtooth Wave
16
Generation
15
Vert Drive Output
GND
14
X–Ray Protect Input
13
Horiz Drive Output9 12
Horiz Drive Pulse
Width Setting
.280 (7.12) Max
110
.995 (25.3) Max
.300 (7.62)
.280
(7.1)
.100 (2.54) .125 (3.17) Min .385 (9.8)
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