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| NTE1268 Integrated Circuit DC Servo Circuit for VCR Description: The NTE1268 is an integrated circuit in a 28-Lead DIP type package designed for DC Servo Control Circuits in VCR's. Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Supply Voltage (V5-24), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 640mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +150C Electrical Characteristics: (TA = +25C, VCC = 12V unless otherwise specified) Parameter Total Circuit Current Trapezoidal Reference Voltage Output Voltage FF-II Trapezoidal I Trapezoidal II S & H-I S & H-II Gate-II Input Sensitivity MM Trapeziodal Gate S&H DET-I DET-II FG FF Symbol I5-2 V16-24 V23-24 V17-24 V17-24 V12-24 V12-24 V10-24 V22-24 V15-24 V7-24 Vis(14) Vis(28) Vis(2) Vis(4) Vis(25) f = 400Hz f = 30Hz, Rectangular Wave f = 30Hz, PW = 100s 400Hz, 1/2 Sampling Sine Wave, td = 1ms Test Conditions Min 23 0.77 Typ 31 1.0 Max 41 1.2 - 3.6 - 500 - - - - - - - - - - Unit mA V V V V mV V V VO-P VO-P VO-P VO-P mVO-P mVO-P mVP-P VO-P 10.0 10.9 2.4 11.0 - 8.0 9.0 3.5 4 3.5 1.5 50 50 100 3 3.0 11.9 240 8.8 10.0 - - - - - - - - Pin Connection Diagram Ripple Filter 1 Detector 2 Input 2 Detector Time Constant 3 FG Amp Input 4 VCC 5 Flip-Flop Output 6 Gate Input 7 Gate Time Constant 8 Gate Time Constant 9 Motor Speed Signal Output 10 Ripple Filter 11 Motor Phase Signal Output 12 Bypass 13 Timing Signal Input 14 28 Detector 1 Input 27 Detector Time Constant 26 Jumper to Pin22 & Pin25 25 Jumper to Pin22 & Pin26 24 GND Return 23 To Head Switch 22 Jumper to Pin25 & Pin26 21 Multi Time Constant 20 Multi Time Constant 19 GND 18 S & H Signal Source 17 Bypass 16 Resistive Constant 15 Timing Reference Signal 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) |
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