TC74ACT540,541P/F/FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74ACT540P, TC74ACT540F, TC74ACT540FT TC74ACT541P, TC74ACT541F, TC74ACT541FT Octal Bus Buffer TC74ACT540P, TC74ACT541P TC74ACT540P/F/FT Inverting, 3-State Outputs TC74ACT541P/F/FT Non-Inverting, 3-State Outputs The TC74ACT540/TC74ACT541 are advanced high speed CMOS OCTAL BUS BUFFERs fabricated with silicon gate and 2 double-layer metal wiring C MOS technology. TC74ACT540F, TC74ACT541F They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. These devices may be used as a level converter for interfacing TTL or NMOS to High Speed CMOS. The inputs are compatible with TTL, NMOS and CMOS output voltage levels. The TC74ACT540 is an inverting type, and the TC74ACT541 is a non-inverting type. When either G1 or G2 are high, the terminal outputs are in the high-impedance state. TC74ACT540FT, TC74ACT541FT All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features High speed: t = 4.3 ns (typ.) at V = 5 V pd CC Low power dissipation: I = 8 A (max) at Ta = 25C CC Compatible with TTL outputs : V = 0.8 V (max) V = 2.0 V (min) IL IH Weight Symmetrical output impedance DIP20-P-300-2.54A : 1.30 g (typ.) : I = I = 24 mA (min) OH OL SOP20-P-300-1.27A : 0.22 g (typ.) Capability of driving 50 transmission lines. TSSOP20-P-0044-0.65A : 0.08 g (typ.) Balanced propagation delays: t t pLH pHL Pin and function compatible with 74F540/541 Start of commercial production 1988-10 1 2014-03-01 TC74ACT540,541P/F/FT Pin Assignment TC74ACT540 TC74ACT541 G 1 1 20 V G1 1 20 V CC CC A1 2 19 G2 A1 2 19 G2 A2 18 Y1 A2 18 Y1 3 3 A3 4 17 Y2 A3 4 17 Y2 A4 5 16 Y3 A4 5 16 Y3 A5 6 15 Y4 A5 6 15 Y4 A6 7 14 Y5 A6 7 14 Y5 A7 8 13 Y6 A7 8 13 Y6 A8 9 12 Y7 A8 9 12 Y7 GND 10 11 Y8 GND 10 11 Y8 (top view) (top view) IEC Logic Symbol TC74ACT540 TC74ACT541 (1) & (1) & G1 EN G1 EN (19) (19) G2 G2 (2) (18) (2) (18) A1 Y1 A1 Y1 (3) (17) (3) (17) A2 Y2 A2 Y2 (4) (16) (4) (16) A3 Y3 A3 Y3 (5) (15) (5) (15) A4 Y4 A4 Y4 (6) (14) (6) (14) A5 Y5 A5 Y5 (7) (13) (7) (13) A6 Y6 A6 Y6 (8) (12) (8) (12) A7 Y7 A7 Y7 (9) (11) (9) (11) A8 Y8 A8 Y8 Truth Table Inputs Outputs G 1 G A2 Y Y n n n 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 Y : ACT541 n Y : ACT540 n 2 2014-03-01