MC1648 Motorola, MC1648 Datasheet
MC1648
Available stocks
Related parts for MC1648
MC1648 Summary of contents
Page 1
... This device may also be used in many other applications requiring a fixed or variable frequency clock source of high spectral purity. (See Figure 2) The MC1648 may be operated from a +5.0Vdc supply or a –5.2Vdc supply, depending upon system requirements. NOTE: The MC1648 is NOT useable as a crystal oscillator. ...
Page 2
... Q11 Q10 EE1 BIAS POINT TEST VOLTAGE/CURRENT VALUES @ Test (Volts) Temperature Temperature V IHmax V ILmin MC1648 –30 C +2.0 +1.5 +25 C +1.85 +1.35 +85 C +1.7 +1.2 Note: SOIC “D” package guaranteed – +70 C only ELECTRICAL CHARACTERISTICS (Supply Voltage = +5.0V) Symbol Characteristic I E Power Supply Drain Current V OH Logic “ ...
Page 3
... MC1648 L=40nH C=10pF +5.0Vdc 0 1200* 3 SIGNAL UNDER 5 TEST 0.1 F Max Unit Condition – mAdc Inputs and outputs open –0.64 Vdc V ILmin to Pin 12 Pin 3 – ...
Page 4
... Q L 100 Figure 3. Test Circuit and Waveforms OPERATING CHARACTERISTICS 1.4V for positive supply operation). When the MC1648 is used with a constant dc voltage to the varactor diode, the output frequency will vary slightly because of internal noise. This variation is plotted versus operating frequency in Figure 5. 0.1 F ...
Page 5
... The 1200 ohm resistor and the scope termination impedance consti tute a 25:1 attenuator probe. Coax shall be CT–070–50 or equivalent. NOT used in normal operation. ** Input resistor and cap are for test only. They are NOT necessary for Figure 8 normal operation. 5 MC1648 100 10 1200 out ...
Page 6
... AGC potential directly affects the output waveform desired to have a sine wave at the output of the MC1648, a series resistor is tied from the AGC point to the most negative power potential (ground if +5.0 volt supply is used, –5.2 volts if a negative supply is used) as shown in Figure 10 ...
Page 7
... Logic P, (P+1) MC12014 Zero Detect Line N p Programmable Programmable Counter MC4016 Counter MC4016 Counter Reset Line Output Figure 11. Method of Extending the Useful Range of the MC1648 (Square Wave Output) 7 MC1648 f out f out = Nf ref where +5.0Vdc Output 1 ...
Page 8
... MC1648 Bias Point L2* Tank C2 1 100 Figure 12. Circuit Used for Collector Output Operation 100 1000 TOTAL COLLECTOR LOAD (OHMS) See test circuit, Figure 12 100MHz C3 = 3.0–35pF Collector Tank 1.0–7.0pF –10k and C1 = 11k @ 100MHz Resonance Oscillator Tank turns #20 AWG 3/16” ...
Page 9
... SEATING PLANE 0. MC1648 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMESNION F MAY NARROW TO 0.76 (0.030) WHERE THE LEAD ENTERS THE CERAMIC BODY. INCHES MILLIMETERS DIM MIN ...
Page 10
... MC1648 Y BRK -N- -L- - 0.007 (0.180 0.007 (0.180 -T- J VIEW S G1 0.010 (0.250 – NOTES: 1. DATUMS -L-, -M-, AND -N- DETERMINED WHERE TOP OF LEAD SHOULDER EXITS PLASTIC BODY AT MOLD PARTING LINE. 2. DIM G1, TRUE POSITION TO BE MEASURED AT DATUM -T-, SEATING PLANE ...
Page 11
... Motorola, Inc. Motorola, Inc Equal JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 81–3–3521–8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 11 MC1648 MC1648/D MOTOROLA ...