NTE1428

NTE1428 Integrated Circuit Cylinder Servo Control Circuit for VCR Description: The NTE1428 is an integrated circuit designed for VTR’s cylinder servo control. Features: D Sample Hold System Speed Control D Incorporating Recording/Playback Switching Circuit D Supply Voltage Either 9V or 12V Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, V1−7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 880mW Operation ambient temperature, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20 to +70°C Storage temperature, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 to +150°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Circuit Current Sensitivity PG − Amp. In PG + Amp. In Cap PG Amp. In VSS Amp. In REF Amp. In REC/P.B. Switch Ref. Voltage (phase trapezoidal wave) High−level output Voltage (Head−SW) Low−level output Voltage (Head−SW) High−level output Voltage (REC CTL Amp) Low−level output Voltage (REC CTL Amp) High−level output Voltage (S/H1) Low−level output Voltage (S/H1) Voltage Gain (CTL Amp.) Sensitivity (FG Amp. In) Ref. Voltage (speed system trapezoidal wave) Symbol I1 S(1) S(2) S(3) S(4) S(5) S(6) VREF(1) VOH(1) VOL(2) VOH(2) VOL(2) VOH(3) VOL(3) GV S(7) VREF(2) VCC = 12V, VI24 = 2Vp−p, 30Hz duty 4% duty 4% VI23 = 2Vp−p, 30Hz duty 96% VCC = 12V Test Conditions V1−7 = 12V VCC = 12V, 30Hz duty 96% VCC = 12V, 30Hz duty 4% VCC = 12V Min 33 1 1 50 2 3 5 2.7 9 − 8 − 9 − 62 100 2.7 Typ − − − − − − − − − − − − − − − − − Max 65 − − − − − − 3.7 − 600 − 1 − 600 70 − 3.7 Unit mA Vo−p Vo−p mVo−p Vo−p Vo−p V V V mV V V V mV dB mVp−p V Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified) Parameter High−level output Voltage (S/H2) Low−level output Votlage (S/H2) High−level output Voltage (Cap PG) Low−level output Voltage (Cap PG) Symbol VOH(4) VOL(4) VOH(5) VOL(5) Test Conditions VCC = 12V Min 10 − 4.4 − Typ − − − − Max − 1.8 6.6 600 Unit V V V mV Pin Connection Diagram VCC From Capstan Servo Control From Capstan Pulse Generator Head Bypass Cap Control Head Signal Input Control Head Signal Return GND S & H Speed Control Bypass Cap Bias Resistor Bypass Cap GND Decouple VCC Drum Freq Gen 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 Rec/PB Switch 27 Control Track Duty Adjust VSS Input 26 Subcarrier Input 25 24 PG Input Return 23 PG Input 22 PG Shifter Adjust 21 PG Shifter Adjust 20 19 18 17 Head Switch Pulse Output Record Shifter Adjust To Capstan Servo Control Bias Resistor 16 Bypass Cap 15 S & H Output (Phase Control) 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)