MC14046B Phase Locked Loop The MC14046B phase locked loop contains two phase comparators, a voltagecontrolled oscillator (VCO), source follower, and zener diode. The comparators have two common signal inputs, PCA and in PCB . Input PCA can be used directly coupled to large voltage in in signals, or indirectly coupled (with a series capacitor) to small voltage MC14046B BLOCK DIAGRAM PIN ASSIGNMENT LD 1 16 V SELF BIAS PHASE DD PCA 14 2 PC1 in out CIRCUIT COMPARATOR 1 PC1 2 15 ZENER out PHASE 13 PC2 out PCB 3 14 PCA in in PCB 3 COMPARATOR 2 1 LD in VCO 4 13 PC2 4 VCO out out out VOLTAGE VCO 9 in 11 R1 CONTROLLED INH 5 12 R2 12 R2 OSCILLATOR V = PIN 16 DD 6 C1 A C1 6 11 R1 A (VCO) 7 C1 V = PIN 8 B SS C1 7 10 SF B out SOURCE FOLLOWER 10 SF out INH 5 V 8 9 VCO SS in V 15 ZENER SS ELECTRICAL CHARACTERISTICS (Voltages Referenced to V ) SS 55 C 25 C 125 C V DD Vdc Min Max Min Typ Max Min Max Characteristic Symbol Unit Output Voltage 0 Level V 5.0 0.05 0 0.05 0.05 Vdc OL V = V or 0 10 0.05 0 0.05 0.05 in DD 15 0.05 0 0.05 0.05 V 5.0 4.95 4.95 5.0 4.95 Vdc 1 Level OH 10 9.95 9.95 10 9.95 V = 0 or V in DD 15 14.95 14.95 15 14.95 Input Voltage (Note 2) 0 Level V Vdc IL (V = 4.5 or 0.5 Vdc) 5.0 1.5 2.25 1.5 1.5 O (V = 9.0 or 1.0 Vdc) 10 3.0 4.50 3.0 3.0 O (V = 13.5 or 1.5 Vdc) 15 4.0 6.75 4.0 4.0 O V 5.0 3.5 3.5 2.75 3.5 Vdc (V = 0.5 or 4.5 Vdc) 1 Level IH O 10 7.0 7.0 5.50 7.0 (V = 1.0 or 9.0 Vdc) O 15 11 11 8.25 11 (V = 1.5 or 13.5 Vdc) O Output Drive Current I mAdc OH (V = 2.5 Vdc) Source 5.0 1.2 1.0 1.7 0.7 OH (V = 4.6 Vdc) 5.0 0.25 0.2 0.36 0.14 OH (V = 9.5 Vdc) 10 0.62 0.5 0.9 0.35 OH (V = 13.5 Vdc) 15 1.8 1.5 3.5 1.1 OH I 5.0 0.64 0.51 0.88 0.36 mAdc (V = 0.4 Vdc) Sink OL OL 10 1.6 1.3 2.25 0.9 (V = 0.5 Vdc) OL 15 4.2 3.4 8.8 2.4 (V = 1.5 Vdc) OL Input Current I 15 0.1 0.00001 0.1 1.0 Adc in Input Capacitance C 5.0 7.5 pF in Quiescent Current I 5.0 5.0 0.005 5.0 150 Adc DD 10 10 0.010 10 300 (Per Package) Inh = PCA = V , in DD 15 20 0.015 20 600 Zener = VCO = 0 V, PCB = V in in DD or 0 V, I = 0 A out Total Supply Current (Note 3) I 5.0 mAdc I = (1.46 A/kHz) f + I T T DD (Inh = 0, f = 10 kHz, C = 50 pF, 10 I = (2.91 A/kHz) f + I o L T DD R1 = 1.0 M , R2 = R = , 15 I = (4.37 A/kHz) f + I SF T DD and 50% Duty Cycle) Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. 2. Noise immunity specified for worstcase input combination. Noise Margin for both 1 and 0 level = 1.0 Vdc min V = 5.0 Vdc DD 2.0 Vdc min V = 10 Vdc DD 2.5 Vdc min V = 15 Vdc DD 3. To Calculate Total Current in General: 3/4 3/4 VCO 1.65 V 1.35 VCO 1.65 in DD in 3 I 2.2 x V + + 1.6 x + 1 x 10 (C + 9) V f + T DD L DD R1 R2 R SF 100% Duty Cycle of PCA in 1 2 1 x 10 V + I where: I in A, C in pF, VCO , V in Vdc, f in kHz, and DD Q T L in DD 100 R1, R2, R in M , C on VCO . SF L out