TC74VHCT540,541AF/AFT/AFK2007-10-011TOSHIBA CMOS Digital Integrated Circuit Silicon MonolithicTC74VHCT540AF,TC74VHCT540AFT,TC74VHCT540AFKTC74VHCT541AF,TC74VHCT541AFT,TC74VHCT541AFKOctal Bus BufferTC74VHCT540AF/AFT/AFKInverted, 3-State OutputsTC74VHCT541AF/AFT/AFKNon-Inverted, 3-State OutputsThe TC74VHCT540A and 541A are advanced high speedCMOS OCTAL BUS BUFFERs fabricated with silicon gateC2MOS technology. They achieve the high speed operationsimilar to equivalent Bipolar Schottky TTL while maintainingthe CMOS low power dissipation.The TC74VHCT540A is an inverting type and, theTC74VHCT541A is a non-inverting type.When either1Gor2Gare high, the terminal outputs are inthe high-impedance state.The input voltage are compatible with TTL output voltage.These devices may be used as a level converter for interfacing3.3 V to 5 V system.Input protection and output circuit ensure that 0 to 5.5 V canbe applied to the input and output (Note) pins without regard tothe supply voltage. These structure prevents device destructiondue to mismatched supply and input/output voltages such asbattery back up, hot board insertion, etc.Note:Output in off-stateFeatures• High speed: tpd = 5.4 ns (typ.) at VCC = 5 V• Low power dissipation: ICC = 4 μA (max) at Ta = 25°C• Compatible with TTL outputs: VIL = 0.8 V (max)VIH = 2.0 V (min)• Power down protection is provided on all inputs and outputs• Balanced propagation delays: tpLH ∼− tpHL• Low noise: VOLP = 1.6 V (max)• Pin and function compatible with the 74 series(74AC/HC/F/ALS/LS etc.) 540/541 type.TC74VHCT540AF, TC74VHCT541AFTC74VHCT540AFT, TC74VHCT541AFTTC74VHCT540AFK, TC74VHCT541AFKWeightSOP20-P-300-1.27A: 0.22 g (typ.)TSSOP20-P-0044-0.65A : 0.08 g (typ.)VSSOP20-P-0030-0.50: 0.03 g (typ.)
