BU4528

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 1) 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 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 SS Absolute maximum ratings (Ta = 25°C, V Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Input voltage Symbol VDD Pd Topr Tstg VIN = 0V) Limits – 0.3 ~ + 18 1000 (DIP), 5...