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| Standard ICs Dual monostable multivibrator BU4528B / BU4528BF The BU4528B and BU4528BF are monostable multivibrators with trigger and reset functions that can be activated. Each chip has two built-in circuits. Triggers can initiate both rising and falling in response to Input A and Input B. As the output monostable pulse width is determined by the time constant of the external resistance (Rx) and the capacitor (Cx), a wide range of output pulse widths can be set. Setting the RESET input to "L" enables external asynchronous resetting and this RESET input can be utilized to reduce the time from the trigger disable input or the power on until the BU4528B and BU4528BF are ready for monostable operation. *Features dissipation. 1) Low power 2) Wide range of operating power supply voltages. 3) High input impedance. 4) High fan-out. 5) Direct drive of 2 L-TTL inputs and 1 LS-TTL input. *Block diagram T11 1 16 VDD T21 RESET1 2 15 T12 3 14 T22 A1 B1 4 13 RESET2 5 12 A2 Q1 Q1 6 11 B2 7 10 Q2 VSS 8 9 Q2 *Truth table INPUT RESET H A B H L L H L, H, L X X H L, H, X X Not Triggered Not Triggered Not Triggered Not Triggered L H Q OUTPUT Q *Logic circuit diagram CX RX VDD H H H H H L T1 A B RESET T2 Q Q Not Triggered 1 Standard ICs BU4528B / BU4528BF *Absolute maximum ratings (Ta = 25C, VSS = 0V) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Input voltage Symbol VDD Pd Topr Tstg VIN Limits - 0.3 ~ + 18 1000 (DIP), 500 (SOP) - 40 ~ + 85 - 55 ~ + 150 - 0.3 ~ VDD + 0.3 Unit V mW C C V *Electrical characteristics otherwise noted, Ta = 25C, VSS = 0V) DC characteristics (unless Parameter Symbol Min. 3.5 Input high level voltage VIH 7.0 11.0 -- Input low level voltage VIL -- -- Input high level current Input low level current IIH IIL -- -- 4.95 Output high level voltage VOH 9.95 14.95 -- Output low level voltage VOL -- -- - 0.16 Output high level current IOH - 0.4 - 1.2 0.44 Output low level current IOL 1.1 3.0 -- Static current dissipation IDD -- -- Typ. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Max. -- -- -- 1.5 3.0 4.0 0.3 - 0.3 -- -- -- 0.05 0.05 0.05 -- -- -- -- -- -- 20 40 80 A mA mA V V A A V V Unit VDD (V) 5 10 15 5 10 15 15 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 VI = VDD or GND VOH = 4.6V VOH = 9.5V VOH = 13.5V VOL = 0.4V VOL = 0.5V VOL = 1.5V IO = 0mA IO = 0mA VIH = 15V VIL = 0V -- -- Conditions 2 Standard ICs Switching characteristics (Ta = 25C, CL = 50pF, VSS = 0V) Parameter Symbol Min. -- Output rise time tTLH -- -- -- Output fall time tTHL -- -- -- Propagation delay time, A or B to Q or Q tPLH tPHL -- -- -- Propagation delay time, A or B to Q or Q tPLH tPHL -- -- -- -- Propagation delay, Reset to Q or Q tPLH tPHL -- -- -- -- -- Minimum input pulse width tWIN -- -- -- Output pulse width tWOUT1 -- -- 25 Output pulse width tWOUT2 10 15 -- Minimum trigger time trr -- -- Input capacitance CIN -- Typ. 100 50 40 100 50 40 325 120 90 705 290 210 325 90 60 1000 300 250 70 30 30 550 350 300 40 50 55 0 0 0 5 Max. -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 55 90 95 -- -- -- -- Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns s s s ns ns ns pF BU4528B / BU4528BF VDD (V) 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 -- Conditions -- -- CX = 15pF, RX = 5k CX = 1000pF, RX = 10k CX = 15pF, RX = 5k CX = 1000pF, RX = 10k CX = 1000pF, RX = 10k CX = 15pF, RX = 5k CX = 15pF, RX = 5k CX = 1000pF, RX = 10k CX = 1000pF, RX = 10k CX = 15pF, RX = 5k -- 3 Standard ICs BU4528B / BU4528BF *Measurement circuits VDD RX CX VDD A Q B Q RESET P.G. P.G. P.G. CL CL T2 T1 VSS Fig. 1 Switching time measurement circuit 20ns 20ns 90% 50% A 20ns B 90% 50% 10% 20ns RESET 90% 50% 10% tPLH tWOUT tPLH tf 90% 50% Q tPHL Q 90% 50% 50% 50% 10% tWOUT 50% tPHL 50% 50% 10% tr 10% tf tPHL tr 90% 50% tPHL trr 20ns 20ns 10% 50% Fig. 2 Switching time waveform 4 Standard ICs BU4528B / BU4528BF *Timing chart AIN BIN RESET Q Q tN : TRIGGER : RESET : RETRIGGER tN t1 [0.2 + 0.1 (VDD - VSS) ] * RxCx 5 t2 t3 tN tN : (Cx > 0.01F) tN t1, t2, t3 : t1,t2 ,t3 < tN Fig. 3 *Electrical characteristic curve 1200 POWER DISSIPATION: Pd (mW) 1000 DIP16 800 600 SOP16 400 200 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE: Ta (C) Fig. 4 Power dissipation vs. Ta *External dimensions (Units: mm) BU4528B BU4528BF 10.0 0.2 19.4 0.3 16 9 6.5 0.3 16 6.2 0.3 4.4 0.2 9 1 0.51Min. 3.2 0.2 4.25 0.3 8 1.5 0.1 7.62 1 8 0.3 0.1 0.11 1.27 0.4 0.1 0.3Min. 0.15 2.54 0.5 0.1 0 ~ 15 DIP16 SOP16 0.15 0.1 5 |
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