NTE874 Integrated Circuit TV Horiz/Vert Countdown System Circuit Description: The NTE874 is a monolithic bipolar/I2L integrated circuit digital sync system designed for use in consumer TV applications for color/monochrome receivers or monitors. This device takes the composite video input signal in combination with the on–chip master–scan oscillator to provide both horizontal drive and vertical deflection output signals. Other on–chip functions include sync separator, horizontal APC, horizontal/vertical count–down circuitry, vertical ramp generator, and horizontal drive circuit (Pulse–Width Modulator). The NTE874 features dual–mode operation and accepts either standard or non–standard video signals. An automatic mode–recognition system forces the operation into the asynchronous mode for non–standard sync signals. Intended for use with 525–line systems, the NTE874 is supplied in the 28–lead dual–in–line plastic package. Features: D Sync Separator D Master Scan Oscillator (at 64 X fH) D Automatic Phase Control (APC) of Oscillator D Horizontal/Vertical Count–down D Vertical Output D Horizontal Drive Output (Pulse–Width Modulator) Absolute Maximum Ratings: POWER SUPPLY: Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Power Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA Injector Supply Voltage, VINJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.75V Injector Supply Current, IINJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mA Absolute Maximum Ratings (Cont’d): INPUTS OUTPUTS: AGC Gate (Pin 9) Source, IEAGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Composite Blanking (Pin 16) Sink, ICBLNK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Horizontal Drive (Pin 5) Sink, ICHD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Horizontal Output (Pin 3) Sink, ICHO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sync Separator Out (Pin 28), ISYNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vertical Drive (Pin 14) Source, IVERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA 10mA 50mA 30mA 30mA 50mA DEVICE DISSIPATION: Maximum Rated Junction Temperature, TJMAX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Maximim Power Dissipation, PD Up to TA = +50°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1W Above TA = +50°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Derate linearly at 11.1 mW/°C AMBIENT TEMPERATURE RANGE: Operating, TOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +85°C Storage, TSTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C LEAD TEMPERATURE (DURING SOLDERING): At distance 1/16 ± 1/32 in. (1.59 ± 0.79mm) from case for 10s max. . . . . . . . . . . . . . . . . . . . . +265°C Standard Operating Range: Parameter Symbol PIN # Min Typ Max Units Analog Supply Voltage VCC 7 10.9 12.0 12.9 V Analog Supply Current ICC 7 30 45 60 mA Injector Supply Voltage VINJ 10 1.3 1.6 1.9 V PD – – 580 – mW Force Asynchronous Low (“0”) VFAL 2 –0.5 0 +0.25 V Force Asynchronous VFAH 2 0.7 0.8 1.5 V Integrated Vertical, Low VIVL 1 – – 1.9 V Integrated Vertical, High VIVH 1 2.8 – – V Total Dissipation, no external loads Electrical Characteristics: (TA = +25°C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1µF from Pin 4 to GND., 10K ohms from Pin 28 to GND., FCLK = 1MHz, (AC Coupled), VSync 1.2V to 4V, VIV 1.9V to 2.8V, VFA 0.2V to 0.7V) Parameter Test Conditions PIN # Min Typ Max Units 7 20 45 60 mA 10 1.3 1.6 1.9 V Power Supply Section Supply Current Pin 10 Open Injector Voltage Sync Separator/Diff. Section Video Inverter, High Voltage V27 = 4V, I26 = –500µA 26 4.2 5.1 5.8 V Sync Processor, Low Voltage V27 = 4V, I26 = 0µA 28 – – .1 V 21 6.5 6.8 7.5 V OSC/Count–Down/APC Section APC Bias V27 = 4V, I26 = 0µA, V21 = Open Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1µF from Pin 4 to GND., 10K ohms from Pin 28 to GND., FCLK = 1MHz, (AC Coupled), VSync 1.2V to 4V, VIV 1.9V to 2.8V, VFA 0.2V to 0.7V) Parameter Test Conditions PIN # Min Typ Max Units OSC/Count–Down/APC Section (Cont’d) APC Discharge V27 = 4V, I26 = 0µA, V21 = Open 21 6.5 6.8 7.5 V APC Discharge I26 = –500µA, V20 = 2V, V21 = 2V, V21 = VAPC Bias (above), (Stop Clock When Pin 21 Goes Low) 21 600 803 1100 µA APC Charge V27 = 4V, I26 = –500µA, V20 = 6V, V21 = VAPC Bias (above) 21 –600 –793 –1100 µA Phase Detector I21 = APC Discharge–APC Charge 21 –30 9.8 30 µA Sync Width, Wide Differentiation V27 = 5V, V23 = 1MHz, I20 = –300µA, V26 = Sq. Wave 0 to 5V with Ton = Toff = 31.75µs 21 5 6 8 µs Sync Width, Narrow Same as above except Ton = 2µs, Toff = 61.5µs 21 1.8 2.3 2.6 µs Phase Detector Bias V27 = 4V 20 3.9 4.3 4.7 V Oscillator Current 1 V24 = 3V, V23 = 6V V21 = 8.5V 25 1.4 1.8 3.0 mA 25 .45 .5 .55 Ratio 24 4.5 4.8 5.5 V OSC/Count–Down/APC Section Oscillator Current Ratio V24 = 3V, V23 = 6V, V21 = Open, Measured I25 & Divide by Oscillator Current 1 Oscillator Bias +Phase Input Current V24 = 0V 24 –230 312 –570 µA –Phase Input Current V23 = 0V 23 –230 331 –570 µA Flyback Charge Current V17 = 0V, V19 = 6V 19 –400 –501 –766 µA Flyback Discharge Current I17 = 700µA, V19 = 6V 19 2 2.4 3.5 mA Flyback Input, Low Current 1 V18 = 0V 18 –3 –1 3 µA Flyback Input, High Current 1 V18 = 2V 18 0.8 1.6 3.8 mA Flyback Input, Low Current 2 V17 = 0V 17 –3 –.09 3 µA Flyback Input, High Current 2 V17 = 2V 17 0.8 1.5 1.9 mA Blanking Voltage V18 = 2V, V23 = 1MHz, Stop Clock when 3V < V16< 5V 16 5.8 6 6.4 V Burst Voltage V18 = 2V, V23 = 1MHz, Stop Clock when V16 > 9V 16 11.2 11.95 – V Burst Saturation Voltage V18 = 0V I16 = 5µA 16 – .45 0.6 V Blanking/Gating Section Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1µF from Pin 4 to GND., 10K ohms from Pin 28 to GND., FCLK = 1MHz, (AC Coupled), VSync 1.2V to 4V, VIV 1.9V to 2.8V, VFA 0.2V to 0.7V) Parameter Test Conditions PIN # Min Typ Max Units Blanking/Gating Section (Cont’d) Horizontal Blanking Starts (See Notes: 1, 2, 4) 16 – .07 0.6 µs Horizontal Blanking Width (See Notes: 2, 4, 5) 16 11.75 12.3 12.75 µs Burst Gate Starts (See Notes: 1, 2, 4) 16 0.15 .44 0.45 µs Burst Gate Trailing Edge (See Notes: 1, 2, 4) 16 8.6 – 9.8 µs AGC Gate Starts (See Notes: 1, 2, 4) 9 – .37 0.9 µs AGC Gate Width 1 (See Notes: 2, 4, 5) 9 4.25 5.3 6.25 µs AGC Gate Width 2 (See Notes: 3, 4, 5) 9 4.25 5.2 6.25 µs VCC = 3V, 50pF (Pin 3 to GND), 3.9 K–ohm (Pin 3 to 3V) 3 2.8 – – VP–P Low Voltage Horizontal Period VCC = 3V, V23 = 1MHz 50pF (Pin 3 to GND), 3.9K–ohm (Pin 3 to 3V) (Trigger Level 1.5V) 3 55 64 75 µs Low Voltage Horizontal Pulse Width Symmetry VCC = 3V, V23 = 1MHz, 50pF (Pin 3 to GND), 3.9K–ohm (Pin 3 to 3V) (Trigger Level 1.5V) Find Pulse Width Divide by Period 3 .3 .48 .7 Ratio Pin 4 Quiescent Voltage V6 = V8 = 6V, I5 = 20mA, Pin 4 Open 8.4 8.7 9.1 V Horizontal Drive Saturation Voltage V6 = V8 = 6V 5 – 174 225 mV Horizontal Drive Symmetry V6 = V8 = 6V, 200 ohm (Pin 5 to GND), 600 ohm (Pin 5 to VCC), V4 = 15, 734Hz, 2Vp–p 5 26 29.5 33 µs Horizontal Drive Ratio 3 – 64 – µs Horizontal Pulse Width 3 31 – 33 µs Horizontal Drive Section Horizontal Out, Low Voltage Start Vertical Drive Section Ramp Leakage V12 = 0V, V11 = 1V, V13 = 4V 11 – .04 –3 µA Mirror Ramp Current I12 = 150µA, V11 = 4V, V13 = 5V 11 – .04 –3 µA Ramp Charging Current, VD High V12 = 0V, V11 = 0V, V13 = 5V, Stop Clock when Pin 11 Goes High 11 –5.5 –10 –15.5 mA Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1µF from Pin 4 to GND., 10K ohms from Pin 28 to GND., FCLK = 1MHz, (AC Coupled), VSync 1.2V to 4V, VIV 1.9V to 2.8V, VFA 0.2V to 0.7V) Parameter Test Conditions PIN # Min Typ Max Units Amplifier Input Voltage Range, VD Low 100ohm (Pin 14 to GND) V13 = 1.7V, Set V11 for V14 = 2V Record V11, 13; Then V13 = 4V Record V11, 13; Find Difference Stop Clock When Pin Goes Low 11,13 – – 50 mV Vertical, On–State Voltage V12 = 0V, V11 = 3V, V13 = 5V, I14 = –45 mA 14 1.4 – – V Vertical, Off–State Current V12 = 0V, V11 = 4V, V13 = 3V, V14 = 5V 14 – – 2 µA Open Loop, Small Signal Voltage Gain 100 ohm (Pin 14 to GND) V13 = 2V Set V11 thru 1K ohm for V14 = 2V Apply 1kHz, 1VRMS to Pin 11 Thru 99 K ohm and 1µF Avol = 20 LOG|V14 (AC)/V11 (AC)) 11,14 24 33 39 dB Mode Change Non–Standard IV Field Count STD/NON–STD Sync = 9, Within IV Window (See Note 6) 11,16 5 – 7 – Mode Change Non–Standard Vertical Sync Field Count STD/NON–STD Sync = Less than 9 11,16 5 – 7 – Mode Change Field Confidence Count, NON–STD/STD Number of New Timing IV/Sync Periods to Return to STD Mode 11,16 7 – 14 – Standard Mode Divide Ratio IV = 16800 Clock Ratio Sync = 9 ) Serrations within 384 Clock Window (After 8 Fields, i.e: On 9th Field) – – – 16800 Standard Mode Vertical Pulse Width (See Note 7) Number of Clock Cycles Output is On 11 383 384 387 Non–Standard Mode IV Ratio Range Can Be and Cause Proper Syncronization, Except for IV Ratio Range of (16748–16832), Sync = Don’t Care (After 7 Fields, i.e.: on 8th Field) – 16160 – 17405 Non–Standard Vertical Pulse Width Number of Clock Cycles Output is On 11 362 364 367 Vertical Drive Section (Cont’d) – – Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1µF from Pin 4 to GND., 10K ohms from Pin 28 to GND., FCLK = 1MHz, (AC Coupled), VSync 1.2V to 4V, VIV 1.9V to 2.8V, VFA 0.2V to 0.7V) Parameter Test Conditions PIN # Min Typ Max Units Vertical Drive Section (Cont’d) Non–Standard Vertical Pulse Width Sync 9 Serrations Within 384 Clock Window, Number of Clock Cycles Output is On 11 362 364 367 – Non–Standard Mode Asynchronous Divide Ratio No IV or Sync Applied (After 7 Fields, i.e., on 8th Field) 11, 16 – – 21888 – Blanking Pulse Width – 16 1200 1216 1220 – Noise Mode Change IV Outside the Range of (16784–16832) Sync = 9 Serrations in 384 Clock Window Pulse Applied 2432 to 11520 After an IV, Pulse is 8 to 32 Clocks Wide. Resync results in next field and is maintained for Mode Change Confidence Count 11,16 – – 16800 – Force Non–Standard Mode IV = 16800 Sync = 9 Serrations Within 384 Clock Window. VFA Open Circuit Vertical Pulse Width M Measured in Next Field. 11 362 364 367 µs Note 1 All timing measurements are with reference to the leading edge of the fly–back pulse input to Pin 18. Fly–back pulse width is 12.00 µs and it is from 0 to 5V. Fly–back pulse train should start about 500 µs after the start of vertical drive pulse. Note 2 Start of fly–back pulse is 90 degrees leading with clock. Note 3 Start of fly–back pulse is 90 degrees lagging with clock. Note 4 Threshold for measuring AGC gate and horizontal blanking is 3V and burst gate is at 9V. Note 5. Timing measurements referenced to trailing edge of negative sync pulse input to Pin 26. The negative sync pulse width is is 4.5µs and is from 0 to 500µA, with negative leading edge delayed 0.5µs from the positive leading edge of the fly–back pulse. The input to Pin 27 is +4VDC. Note 6 IV Ratio same as in Non–Standard Mode Ratio Range Test. Note 7 IV Ratio same as in Standard Mode Ratio Test. Note 8 Burst Gate Start is with reference to trailing edge of sync pulse at Pin 26. Sync Pulse is a 500µA Sink Current at Pin 26. Pin Connection Diagram Integrated Vert Input 1 28 Sync Output Mode Select 2 27 Composite Video Input Horiz Output 3 26 Sync Sep Filter Horiz Sawtooth Input 4 25 OSC Tank Horiz Drive Output 5 24 OSC Tank Lag Input B+ Adjust Ref 6 23 OSC tank Lead Input VCC Beam Current Feedback Ref AGC Gate Output 7 22 GND 8 21 APC Filter 9 20 Flyback Sawtooth Ramp Shunt Reg 10 19 Flyback Sawtooth Filter Vert Ramp Shape 11 18 Flyback Input 1 Vert Height Adjust 12 17 Flyback Input 2 16 Sandcastle Output Vert Feedback 13 15 Vert GND Vert Output 14 14 1 15 28 1.469 (37.32) Max .540 (13.7) .250 (6.35) .100 (2.54) 1.300 (33.02) .122 (3.1) Min .600 (15.24)