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 Symbol Min Typ Max Unit Supply Voltage VDD 4.75 − 8.5 V Supply Voltage VSS − 0 − V High−Level Input Voltage VIH VDD to 0.5 Low−Level Input Voltage VIL − − 0.5 V Oscillation Input Amplitude Voltage VI 0.3 − − VPP Input requency with the terminal N in High−Level f − 3.58 5.5 MHz Input requency with the terminal N in Low−Level f − 4.43 5.5 MHz V Electrical Characteristics: (TA = +25°C, VDD = 6.5V, VSS = 0V, fIN = 4.5MHz unless otherwise specified) Symbol Parameter Test Conditions Min Operational Supply Voltage VDD TA = −30° to +70°C Supply Current IDD N. RESET Input/Output Open High−Level Input Voltage Typ Max Unit 4.75 − 8.5 V − − 5 mA VIH VDD to 0.5 − − V Low−Level Input Voltage VIL − − 0.5 V High−Level Output Voltage VOH VDD to 0.5 − − V Low−Level Output Voltage VOL − − 0.5 V High−Level Output Current IOH VD = VSS −2 − − mA Low−Level Output Current IOL VO = VDD 2 − − mA − 20 − kΩ − 20 − kΩ 0.3 − − VPP 5.5 − − MHz Pull−Up Resistance RI N. RESET Inputs Oscillation Input Amplitude Voltage Max. Operating Frequency VI VDD = 4.75V fMAX Pin Connection Diagram Divided Freq Output 1 8 VDD 2 7 Freq Dividing Ratio Select Input Tuner Shaped Waveform Output 3 6 OSC Output Reset Input RESET 4 5 OSC Input VSS 8 5 .256 (6.52) Max 1 4 .393 (10.0) Max .300 (7.62) .150 (3.81) .070 (1.77) Min .100 (2.54) .300 (7.62)