NTE1427 Integrated Circuit VTR Reference Frequency Divider Description: The NTE1427 is an integrated circuit designed for VTR’s reference frequency dividing. Features: D The functions consist of: 3.58MHz, 4.43MHz crystal oscillation Frequency divider circuit D Divider ratio changeable either for NTSC system or PAL system D Divider output frequency NTSC system 59.9Hz (3.58MHz) PAL system 50.0Hz (4.43MHz) D Supply voltage either 9V or 12V Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5V Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.5mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280°C Operating Supply Voltage, VCC(opr) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8 ~ 12.5V Operation ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20 ∼ +70°C Storage temperature, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 ∼ +150°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Total circuit current Itot Sensitivity (Divider Input) S(1) Sensitivity (N/P Switch) S(2) High−level output voltage (Divider) VOH Low−level output voltage (Divider) VOL Output Voltage (X’tal Osc) VO Test Conditions V7−4 = 9V VCC = 9V VCC = 9V VCC = 9v, 3.58 Min Typ Max Unit 13 − 21 mA 400 − − mVp−p 3 − − V 4.5 − − V − − 0.5 V Pin Connection Diagram 7 VCC 6 NTSC/PAL Select 5 Divide Output 4 GND 3 X’tal OSC 2 X’tal OSC 1 OSC Output .118 (3.0) .728 (18.5) Max .248 (6.3 Max .095 (2.42) 1 7 .118 (3.0) Min .100 (2.54) .600 (15.24) .012 (0.32)