TC74HC4538AF - Toshiba Semiconductor

TC74HC4538AF Dual Retriggerable Monostable Multivibrator

(1) Stand-by state The external capacitor is fully charge to VCC in the stand-by state. That means, before triggering, QP and QN transistors which are connected to the T2 node are in the off state. Two comparators that relate to the timing of the output pulse, and two reference voltage supplies stop their operation. The total supply current is only leakage c.

Features

(Note)
• High speed: tpd = 25 ns (typ.) at VCC = 5 V
• Low power dissipation Stand by state: ICC = 4 μA (max) at Ta = 25°C Active state: ICC = 300 μA (max) at Ta = 25°C
• High noise immunity: VNIH = VNIL = 28% VCC (min)
• Output drive capability: 10 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 4 mA (min)
• Balanced propagation delays: tpLH −∼ tpHL
• Wide operating voltage range: VCC (opr) = 2 V to 6 V
• Pin and function compatible with 4538B Note: In the case of using only one circuit, CD should be tied to GND, T1
·T2
·Q
· Q should be tied to OPEN, the other inputs should be tied to .