NTE1581

NTE1581 Integrated Circuit CMOS, Frequency Divider/Counter for VCR Description: The NTE1581 is a frequency divider manufactured by aluminum CMOS technology. It produces a frequency of 1/59719 or 1/88672 of the input frequency (3.58MHz to 60Hz or 4.43MHz to 50Hz). Features: D Makes Possible a Crystal Oscillator Circuit D Capable of Handling Small−Amplitude Input Signals as low as 0.3Vpp D Frequency−Dividing Ratio Selected Through Terminal N D Reset Function D Produces a Shaped−Waveform Output of the same Frequency as the Input Signal or Oscillation Output D Derives a Vertial Scanning Frequency from TV Color Subcarrier Applications: D Frequency Divider for VTR Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3V to 9V Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS ≤ VI ≤ VDD Power Dissipation (TA = +25°C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250W Operating Free−Air Temperature Range, Topt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +125°C Recommended Operating Conditions: (TA = −30° to +70°C, unless otherwise specified) Parameter Supply Voltage Supply Voltage High−Level Input Voltage Low−Level Input Voltage Oscillation Input Amplitude Voltage Input requency with the terminal N in High−Level Input requency with the terminal N in Low−Level Symbol VDD VSS VIH VIL VI f f Min 4.75 − VDD to 0.5 − 0.3 − − − − 3.58 4.43 0.5 − 5.5 5.5 Typ − 0 Max 8.5 − Unit V V V V VPP MHz MHz Electrical Characteristics: (TA = +25°C, VDD = 6.5V, VSS = 0V, fIN = 4.5MHz unless otherwise specified) Parameter Operational Supply Voltage Supply Current High−Level Input Voltage Low−Level Input Voltage High−Level Output Voltage Low−Level Output Voltage High−Level Output Current Low−Level Output Current Pull−Up Resistance N. RESET Inputs Oscillation Input Amplitude Voltage Max. Operating Frequency Symbol VDD IDD VIH VIL VOH VOL IOH IOL RI VI fMAX Pin Connection Diagram Test Conditions TA = −30° to +70°C N. RESET Input/Output Open Min 4.75 − VDD to 0.5 − VDD to 0.5 − Typ Max Unit − − − − − − − − 20 20 − − 8.5 5 − 0.5 − 0.5 − − − − − − V mA V V V V mA mA kΩ kΩ VPP MHz VD = VSS VO = VDD −2 2 − − VDD = 4.75V 0.3 5.5 Divided Freq Output VSS Freq Dividing Ratio Select Input Reset Input RESET 1 2 3 4 8 7 6 5 VDD Tuner Shaped Waveform Output OSC Output OSC Input 8 5 .256 (6.52) Max 1 4 .393 (10.0) Max .150 (3.81) .300 (7.62) .100 (2.54) .300 (7.62) .070 (1.77) Min