TC74HC540,541AP/AF TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC540AP, TC74HC540AF TC74HC541AP, TC74HC541AF Octal Bus Buffer TC74HC540AP/AF Inverting, 3-State TC74HC540AP, TC74HC541AP Outputs TC74HC541AP/AF Non-Inverting, 3-State Outputs The TC74HC540A/TC74HC541A are high speed CMOS OCTAL 2 BUS BUFFERs fabricated with silicon gate C MOS technology. They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. TC74HC540AF, TC74HC541AF The TC74HC540A is an inverting type, and the TC74HC541A is a non-inverting type. When either G1 or G2 are high, the terminal outputs are in the high-impedance state. All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features High speed: t = 10 ns (typ.) at V = 5 V pd CC Weight Low power dissipation: I = 4 A (max) at Ta = 25C DIP20-P-300-2.54A : 1.30 g (typ.) CC SOP20-P-300-1.27A : 0.22 g (typ.) High noise immunity: V = V = 28% V (min) NIH NIL CC Output Drive Capability: 15 LSTTL loads Symmetrical output impedance: I = I = 6 mA (min) OH OL Balanced propagation delays: t t pLH pHL Wide operating voltage range: V (opr) = 2 to 6 V CC Pin and function compatible with 74LS540/541 Start of commercial production 1987-11 1 2014-03-01 TC74HC540,541AP/AF Pin Assignment TC74HC540A TC74HC541A IEC Logic Symbol TC74HC540A TC74HC541A Truth Table Inputs Outputs G 1 G A2 n Yn* Yn* H X X Z Z X H X Z Z L L H H L L L L L H X: Dont care Z: High impedance *: Yn............. HC541 Yn ............ HC540 2 2014-03-01