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. •1)Features Low power dissipation. 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 2 15 T12 RESET1 3 14 T22 A1 4 13 RESET2 B1 5 12 A2 Q1 6 11 B2 Q1 7 10 Q2 VSS 8 9 •Truth table •Logic circuit diagram INPUT RESET A OUTPUT B Q Q CX RX VDD H H H Q2 L H H H H L, H, T1 L Not Triggered H Not Triggered Not Triggered H L L X X L X X Not Triggered L, H, A B T2 Q Q RESET Not Triggered H 1 Standard ICs BU4528B / BU4528BF •Absolute maximum ratings (Ta = 25°C, V SS Parameter = 0V) Symbol Limits Unit Power supply voltage VDD – 0.3 ~ + 18 V Power dissipation Pd 1000 (DIP), 500 (SOP) mW Operating temperature Topr – 40 ~ + 85 °C Storage temperature Tstg – 55 ~ + 150 °C – 0.3 ~ VDD + 0.3 V VIN Input voltage characteristics •DCElectrical characteristics (unless otherwise noted, Ta = 25°C, V Parameter Input high level voltage Input low level voltage Min. Max. Unit 3.5 — — VIH 7.0 — — 11.0 — — 15 — — 1.5 5 — — 3.0 — — 4.0 Conditions VDD (V) 5 V V — 10 — 10 15 Input high level current IIH — — 0.3 µA 15 VIH = 15V Input low level current IIL — — – 0.3 µA 15 VIL = 0V 4.95 — — 9.95 — — 14.95 — — — — 0.05 — — 0.05 Output high level voltage Output low level voltage VOH VOL — Output high level current Output low level current Static current dissipation 2 = 0V) Symbol VIL Typ. SS IOH IOL IDD 5 V 10 IO = 0mA 15 5 V 10 IO = 0mA — 0.05 15 – 0.16 — — 5 VOH = 4.6V – 0.4 — — 10 VOH = 9.5V – 1.2 — — 15 VOH = 13.5V 0.44 — — 1.1 — — 3.0 — — — — 20 — — 40 — — 80 mA mA 5 VOL = 0.4V 10 VOL = 0.5V 15 VOL = 1.5V 5 µA 10 15 VI = VDD or GND Standard ICs BU4528B / BU4528BF Switching characteristics (Ta = 25°C, CL = 50pF, VSS = 0V) Parameter Output rise time Output fall time Propagation delay time, A or B to Q or Q Propagation delay time, A or B to Q or Q Propagation delay, Reset to Q or Q Minimum input pulse width Output pulse width Output pulse width Minimum trigger time Input capacitance Symbol tTLH tTHL tPLH tPHL tPLH tPHL tPLH tPHL tWIN tWOUT1 tWOUT2 trr CIN Min. Typ. Max. Unit — 100 — ns 5 — 50 — ns 10 — 40 — ns 15 — 100 — ns 5 — 50 — ns 10 — 40 — ns 15 — 325 — ns 5 — 120 — ns 10 — 90 — ns 15 — 705 — ns 5 — 290 — ns 10 — 210 — ns 15 — 325 — ns 5 — 90 — ns 10 — 60 — ns 15 — 1000 — ns 5 — 300 — ns 10 — 250 — ns 15 — 70 — ns 5 — 30 — ns 10 — 30 — ns 15 — 550 — ns 5 — 350 — ns 10 VDD (V) — 300 — ns 15 25 40 55 µs 5 10 50 90 µs 10 15 55 95 µs 15 — 0 — ns 5 — 0 — ns 10 — 0 — ns 15 — 5 — pF — Conditions — — CX = 15pF, RX = 5kΩ CX = 1000pF, RX = 10kΩ CX = 15pF, RX = 5kΩ CX = 1000pF, RX = 10kΩ CX = 1000pF, RX = 10kΩ CX = 15pF, RX = 5kΩ CX = 15pF, RX = 5kΩ CX = 1000pF, RX = 10kΩ CX = 1000pF, RX = 10kΩ CX = 15pF, RX = 5kΩ — 3 Standard ICs BU4528B / BU4528BF •Measurement circuits VDD RX CX VDD T2 T1 A Q B Q RESET P.G. P.G. P.G. CL CL VSS Fig. 1 Switching time measurement circuit 20ns 20ns 90% 50% 50% 10% A 20ns 20ns B 90% 50% 10% 20ns 20ns RESET 90% 50% 10% tPLH tWOUT tPLH tr tf 90% 90% 50% 50% 50% 50% 10% 10% Q tPHL tPHL tPHL tr tf tPHL Q 90% 50% 50% 50% 50% 10% tWOUT Fig. 2 Switching time waveform 4 trr Standard ICs BU4528B / BU4528BF •Timing chart AIN BIN RESET Q Q tN tN t1 t2 t3 tN tN : (Cx > 0.01µF) tN ⱌ [0.2 + 0.1 (VDD – VSS) ] · RxCx 5 t1, t2, t3 : t1,t2 ,t3 < tN : TRIGGER : RESET : RETRIGGER Fig. 3 •Electrical characteristic curve POWER DISSIPATION: Pd (mW) 1200 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 0.51Min. 3.2 ± 0.2 4.25 ± 0.3 6.2 ± 0.3 7.62 0.3 ± 0.1 2.54 0.5 ± 0.1 16 9 1 8 1.27 0.4 ± 0.1 0.15 ± 0.1 8 0.11 1 1.5 ± 0.1 9 6.5 ± 0.3 16 4.4 ± 0.2 19.4 ± 0.3 0.3Min. 0° ~ 15° 0.15 DIP16 SOP16 5