 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C Maximim Power Dissipation, PD Up to TA = +50C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1W Above TA = +50C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Derate linearly at 11.1 mW/C AMBIENT TEMPERATURE RANGE: Operating, TOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +85C Storage, TSTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C LEAD TEMPERATURE (DURING SOLDERING): At distance 1/16 1/32 in. (1.59 0.79mm) from case for 10s max. . . . . . . . . . . . . . . . . . . . . +265C Standard Operating Range: Parameter Analog Supply Voltage Analog Supply Current Injector Supply Voltage Total Dissipation, no external loads Force Asynchronous Low ("0") Force Asynchronous Integrated Vertical, Low Integrated Vertical, High Symbol VCC ICC VINJ PD VFAL VFAH VIVL VIVH PIN # 7 7 10 - 2 2 1 1 Min 10.9 30 1.3 - -0.5 0.7 - 2.8 Typ 12.0 45 1.6 580 0 0.8 - - Max 12.9 60 1.9 - +0.25 1.5 1.9 - Units V mA V mW V V V V Electrical Characteristics: (TA = +25C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1F 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 Power Supply Section Supply Current Injector Voltage Sync Separator/Diff. Section Video Inverter, High Voltage Sync Processor, Low Voltage APC Bias V27 = 4V, I26 = -500A V27 = 4V, I26 = 0A V27 = 4V, I26 = 0A, V21 = Open 26 28 21 4.2 - 6.5 5.1 - 6.8 5.8 .1 7.5 V V V Pin 10 Open 7 10 20 1.3 45 1.6 60 1.9 mA V Test Conditions PIN # Min Typ Max Units OSC/Count-Down/APC Section Electrical Characteristics (Cont'd): (TA = +25C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1F 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 APC Discharge APC Discharge Test Conditions V27 = 4V, I26 = 0A, V21 = Open I26 = -500A, V20 = 2V, V21 = 2V, V21 = VAPC Bias (above), (Stop Clock When Pin 21 Goes Low) V27 = 4V, I26 = -500A, V20 = 6V, V21 = VAPC Bias (above) I21 = APC Discharge-APC Charge V27 = 5V, V23 = 1MHz, I20 = -300A, V26 = Sq. Wave 0 to 5V with Ton = Toff = 31.75s Same as above except Ton = 2s, Toff = 61.5s V27 = 4V V24 = 3V, V23 = 6V V21 = 8.5V V24 = 3V, V23 = 6V, V21 = Open, Measured I25 & Divide by Oscillator Current 1 V24 = 0V V23 = 0V V17 = 0V, V19 = 6V I17 = 700A, V19 = 6V V18 = 0V V18 = 2V V17 = 0V V17 = 2V V18 = 2V, V23 = 1MHz, Stop Clock when 3V < V16< 5V V18 = 2V, V23 = 1MHz, Stop Clock when V16 > 9V V18 = 0V I16 = 5A PIN # 21 21 Min 6.5 600 Typ 6.8 803 Max 7.5 1100 Units V A OSC/Count-Down/APC Section (Cont'd) APC Charge 21 -600 -793 -1100 A A s Phase Detector Sync Width, Wide Differentiation 21 21 -30 5 9.8 6 30 8 Sync Width, Narrow Phase Detector Bias Oscillator Current 1 21 20 25 1.8 3.9 1.4 2.3 4.3 1.8 2.6 4.7 3.0 s V mA OSC/Count-Down/APC Section Oscillator Current Ratio 25 .45 .5 .55 Ratio Oscillator Bias +Phase Input Current -Phase Input Current Flyback Charge Current Flyback Discharge Current Blanking/Gating Section Flyback Input, Low Current 1 Flyback Input, High Current 1 Flyback Input, Low Current 2 Flyback Input, High Current 2 Blanking Voltage Burst Voltage Burst Saturation Voltage 24 24 23 19 19 18 18 17 17 16 16 16 4.5 -230 -230 -400 2 -3 0.8 -3 0.8 5.8 11.2 - 4.8 312 331 -501 2.4 -1 1.6 -.09 1.5 6 11.95 .45 5.5 -570 -570 -766 3.5 3 3.8 3 1.9 6.4 - 0.6 V A A A mA A mA A mA V V V Electrical Characteristics (Cont'd): (TA = +25C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1F 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 Blanking/Gating Section (Cont'd) Horizontal Blanking Starts Horizontal Blanking Width Burst Gate Starts Burst Gate Trailing Edge AGC Gate Starts AGC Gate Width 1 AGC Gate Width 2 Horizontal Drive Section Horizontal Out, Low Voltage Start VCC = 3V, 50pF (Pin 3 to GND), 3.9 K-ohm (Pin 3 to 3V) 3 3 2.8 55 - 64 - 75 VP-P s (See Notes: 1, 2, 4) (See Notes: 2, 4, 5) (See Notes: 1, 2, 4) (See Notes: 1, 2, 4) (See Notes: 1, 2, 4) (See Notes: 2, 4, 5) (See Notes: 3, 4, 5) 16 16 16 16 9 9 9 - 11.75 0.15 8.6 - 4.25 4.25 .07 12.3 .44 - .37 5.3 5.2 0.6 12.75 0.45 9.8 0.9 6.25 6.25 s s s s s s s Test Conditions PIN # Min Typ Max Units Low Voltage Horizontal Period VCC = 3V, V23 = 1MHz 50pF (Pin 3 to GND), 3.9K-ohm (Pin 3 to 3V) (Trigger Level 1.5V) 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 V6 = V8 = 6V, I5 = 20mA, Pin 4 Open V6 = V8 = 6V V6 = V8 = 6V, 200 ohm (Pin 5 to GND), 600 ohm (Pin 5 to VCC), V4 = 15, 734Hz, 2Vp-p 3 .3 .48 .7 Ratio Pin 4 Quiescent Voltage Horizontal Drive Saturation Voltage Horizontal Drive Symmetry 8.4 5 5 - 26 8.7 174 29.5 9.1 225 33 V mV s Horizontal Drive Ratio Horizontal Pulse Width Vertical Drive Section Ramp Leakage Mirror Ramp Current Ramp Charging Current, VD High V12 = 0V, V11 = 1V, V13 = 4V I12 = 150A, V11 = 4V, V13 = 5V V12 = 0V, V11 = 0V, V13 = 5V, Stop Clock when Pin 11 Goes High 3 3 11 11 11 - 31 - - -5.5 64 - .04 .04 -10 - 33 -3 -3 -15.5 s s A A mA Electrical Characteristics (Cont'd): (TA = +25C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1F 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 Vertical Drive Section (Cont'd) 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 V12 = 0V, V11 = 3V, V13 = 5V, I14 = -45 mA V12 = 0V, V11 = 4V, V13 = 3V, V14 = 5V 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 1F Avol = 20 LOG|V14 (AC)/V11 (AC)) Sync = 9, Within IV Window (See Note 6) Sync = Less than 9 11,13 - - 50 mV Test Conditions PIN # Min Typ Max Units Vertical, On-State Voltage Vertical, Off-State Current Open Loop, Small Signal Voltage Gain 14 14 11,14 1.4 - 24 - - 33 - 2 39 V A dB Mode Change Non-Standard IV Field Count STD/NON-STD Mode Change Non-Standard Vertical Sync Field Count STD/NON-STD Mode Change Field Confidence Count, NON-STD/STD Standard Mode Divide Ratio 11,16 5 - 7 - 11,16 5 - 7 - Number of New Timing IV/Sync Periods to Return to STD Mode IV = 16800 Clock Ratio Sync = 9 ) Serrations within 384 Clock Window (After 8 Fields, i.e: On 9th Field) (See Note 7) Number of Clock Cycles Output is On 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) Number of Clock Cycles Output is On 11,16 7 - 14 - - - - 16800 Standard Mode Vertical Pulse Width Non-Standard Mode 11 383 384 387 - - 16160 - 17405 Non-Standard Vertical Pulse Width 11 362 364 367 - Electrical Characteristics (Cont'd): (TA = +25C, VCC = 12VDC, V25 = 12VDC, Pin 2, 15, 22 to GND;, 1F 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 Vertical Drive Section (Cont'd) Non-Standard Vertical Pulse Width Non-Standard Mode Asynchronous Divide Ratio Blanking Pulse Width Noise Mode Change Sync 9 Serrations Within 384 Clock Window, Number of Clock Cycles Output is On No IV or Sync Applied (After 7 Fields, i.e., on 8th Field) - 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 IV = 16800 Sync = 9 Serrations Within 384 Clock Window. VFA Open Circuit Vertical Pulse Width M Measured in Next Field. 11 362 364 367 - Test Conditions PIN # Min Typ Max Units 11, 16 16 11,16 - 1200 - - 1216 - 21888 1220 16800 - - - Force Non-Standard Mode 11 362 364 367 s 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 s and it is from 0 to 5V. Fly-back pulse train should start about 500 s 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 4.5s and is from 0 to 500A, with negative leading edge delayed 0.5s 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 500A Sink Current at Pin 26. Pin Connection Diagram Integrated Vert Input Mode Select Horiz Output Horiz Sawtooth Input Horiz Drive Output B+ Adjust Ref VCC Beam Current Feedback Ref AGC Gate Output 1 2 3 4 5 6 7 8 9 28 Sync Output 27 Composite Video Input 26 Sync Sep Filter 25 OSC Tank 24 OSC Tank Lag Input 23 OSC tank Lead Input 22 GND 21 APC Filter 20 Flyback Sawtooth Ramp 19 Flyback Sawtooth Filter 18 Flyback Input 1 17 Flyback Input 2 16 Sandcastle Output 15 Vert GND Shunt Reg 10 Vert Ramp Shape 11 Vert Height Adjust 12 Vert Feedback 13 Vert Output 14 14 1 15 28 1.469 (37.32) Max .250 (6.35) .540 (13.7) .100 (2.54) 1.300 (33.02) .122 (3.1) Min .600 (15.24) |
Price & Availability of NTE874
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |