NTE1745 Integrated Circuit High Speed Divider 1/20, 1/100 for VCR Description: The NTE1745 is a semiconductor integrated circuit in an 8–Lead SIP type package consisting of a built–in 1/20 and 1/100 high–speed frequency divider featuring an ECL circuit configuration. Features: D High–Speed Operation (fmax = 130MHz) D Operation at Low Input Amplitudes (180mVp–p Minimum Input Amplitude) D TTL Level Output Applications: FM radio prescalers, digital equipment for consumer and industrial applications Function: This divider is based on an ECL circuit configuration. When a frequency up to a maximum of 130MHz is applied to the TI input pin, 1/20–divided output is produced when the division ratio selection input pin (M) is low–level or a 1/100–divided output is produced when the division ratio selection input pin (M) is high–level. The output (TO) is available in the TTL level open collector format. Absolute Maximum Ratings: (TA = –10° to +75°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V Input Signal Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5Vp–p Output Signal Voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.33W Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +125°C Electrical Characteristics: (TA = –10° to +75°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage VCC 4.5 5 5.5 V Low–Level Output Current IOL – – 5 mA Input Frequency fIN 30 – 130 MHz TA = +25°C High Input Voltage (M Input) VIH(M) 2.6 – Vcc V Low Input Voltage (M Input) VIL(M) 0 – 0.4 V 180 – 800 mVp–p Input Signal Voltage Vi TA = +25°C Circuit Current ICC VCC = 5V – 6.5 – mA Low–Level Output Voltage VOL VCC = 4.5V, IOL = 5mA – – 0.5 V Minimum Operating Frequency fmax VCC = 5V, TA = +25°C, VIN = 180mVp–p 130 – – MHz High Input Current (M Input) IIH(M) VCC = 5V, VIH(M) = 2.6V – 2 – µA Low Input Current (M Input) IIL(M) VCC = 5V, VIL(M) = 0.4V – 0.1 – µA VCC = 5V, VO = 5.5V – – 100 µA Output Leakage Current IO(Leak) Pin Connection Diagram (Front View) 8 7 6 5 4 3 2 1 .768 (19.52) Max To Open Collector Output VCC N.C. Vref Input Reference Bias Input (T) Frequency Division Ratio Selection Input (M) N.C. GND .118 (3.0) Max .264 (6.72) Max 1 8 .165 (4.2) Min .100 (2.54) Typ .700 (17.78)