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NTE7084 Integrated Circuit Color TV Sync Deflection Circuit
Description: The NTE7084 is an IC containing not only the main functions required to achieve synchronization and deflection in color television receivers but also a generator of horizontal, vertical blanking pulses, and a generator of burst gate pulses (sandcastle type) in an 18-Lead DIP type package. This is a multifunctional device ideally suited for use in color television receivers aiming at high-quality picture reproduction. Functions: D Synchronizing Separation D Vertical Oscillation D Vertical Drive D Horizontal AFC D X-Ray Protection D Horizontal Oscillation D Sandcastle Pulse (Burst Gate Pulse + Horizontal Blanking Pulse) D Composite Blanking Pulse (Vertical + Horizontal Blanking Pulse) Features: D Horizontal and Vertical Oscillations are Stable Against Variations in Ambient Temperature and Supply Voltage due to Small Warm-Up Drift. D Small Variation in Horizontal Oscillation Frequency D Good Linearity and Interlace because DC Bias at Vertical Output Stage is Subjected to Sampling Control Within Retrace Time. D Vertical Blanking Pulse Width can be set freely by Peripheral Parts. D Minimized Picture Distortion because AFC Circuit is Defeated During Vertical Trigger Pulse Input Period. D Multifunctional and Compact Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Maximum Supply Voltage, VCC14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V Maximum Current Dissipation, ICC18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16mA Maximum Applied Voltage, V11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -6V Allowable Power Dissipation (TA +65C), PDmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 570mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +85C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125C Recommended Operating Conditions: (TA = +25C unless otherwise specified) Recommended Supply Voltage, VCC14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V
Electrical Characteristics: (TA = +25C, VCC14 = 12V unless otherwise specified)
Parameter VCC14 Current Dissipation VCC18 Supply Voltage Zener Bias Minimum Current Sync Separator Input DC Level Sync Signal Peak Value Burst Gate Pulse Peak Value (SCP) Burst Gate Pulse Delay Time 1 (SCP) Burst Gate Pulse Delay Time 2 (SCP) Horizontal Blanking Pulse Peak Value (SCP) Horizontal Blanking Pulse Peak Value (CBP) Vertical Blanking Pulse Peak Value (CBP) Vertical Frequency Pull-In Range Vertical Free-Running Frequency Supply Voltage Dependence of Vertical Frequency Middle Point Control Threshold Level Vertical Blanking Threshold Level Vertical Oscillation Start Voltage Temperature Characteristic of Vertical Frequency Vertical Driver Amplification Factor Horizontal AFCD.C Loop Gain Horizontal Free-Running Frequency Horizontal Oscillation Start Voltage Supply Voltage Dependence of Horizontal Frequency VZ - VZ x 90% fH +sign at V1 = 5V, -sign at V1 = 1V fH center 15.73kHz TA = -10 to +60C fv I = 1mA Load Resistance R = 33k Vertical Sync 60Hz VR1 = fv center 55Hz V14 = 12V 1V, 55Hz at 12V TBR TBF Symbol ICC14 VCC18 Test Conditions Min 13.5 11.8 - 9.0 9.5 9.5 - 3.6 2.7 12.7 7.2 9.0 50 -0.5 3.8 5.0 - -0.028 12 0.6 -750 - -50 Typ - - - - - - - - - - - - - - - - - - - - - - - Max 29.0 13.2 13 9.6 11.5 11.5 0.5 4.2 3.3 13.5 8.2 11.0 60 0.5 4.4 5.7 4 Unit mA V mA V V V s s V V V Hz Hz Hz V V V
0.028 Hz/C 17 1.5 750 4 50 dB mA Hz V Hz
Pin Connection Diagram AFC Comparison Sawtooth Wave Input AFC Output Time Constant Circuit Horizontal Output Holddown Input GND Vertical Drive Output Vertical Drive Sawtooth Wave Input Vertical Output Middle Point Voltage 1 2 3 4 5 6 7 8 9 18 +VCC18 (Horizontal) Composite Blanking 17 Pulse Output 16 Video Signal Input (Positive) 15 Time Constant Circuit 14 +VCC14 (Vertical) 13 Sandcastle Pulse Output 12 Horiz, Vert Sync Signal Output 11 Vertical Trigger Input 10 Time Constant Circuit
18
10
1
9
.870 (22.1) Max
.250 (6.35)
.150 (3.8)
.100 (2.54) .800 (20.3)
.125 (3.17) Min

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