TC74ACT245F(F) Toshiba

TC74ACT245,640P/F/FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74ACT245P, TC74ACT245F, TC74ACT245FT TC74ACT640P, TC74ACT640F, TC74ACT640FT Octal Bus Transceiver TC74ACT245P, TC74ACT640P TC74ACT245P/F/FT 3-State, Non-Inverting TC74ACT640P/F/FT 3-State, Inverting The TC74ACT245 and 640 are advanced high speed CMOS OCTAL BUS TRANSCEIVERs fabricated with silicon gate and 2 double-layer metal wiring C MOS technology. They achieve the high speed operation similar to equivalent TC74ACT245F, TC74ACT640F 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. They are intended for two-way asynchronous communication between data busses. The direction of data transmission is determined by the level of the DIR input. The enable input ( G ) can be used to disable the device so that the busses are effectively isolated. TC74ACT245FT, TC74ACT640FT All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features (Note 1) (Note 2) High speed: t = 4.7 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 74F245/640 Note 1: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result. Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull down resistors. Start of commercial production 1988-10 1 2014-03-01 TC74ACT245,640P/F/FT Pin Assignment TC74ACT245 TC74ACT640 DIR 1 20 V DIR 1 20 V CC CC A1 2 19 G A1 2 19 G A2 18 B1 A2 18 B1 3 3 A3 4 17 B2 A3 4 17 B2 A4 5 16 B3 A4 5 16 B3 A5 6 15 B4 A5 6 15 B4 A6 7 14 B5 A6 7 14 B5 A7 8 13 B6 A7 8 13 B6 A8 9 12 B7 A8 9 12 B7 GND 10 11 B8 GND 10 11 B8 (top view) (top view) IEC Logic Symbol TC74ACT245 TC74ACT640 (19) (19) G3 G3 G G (1) (1) DIR 3 EN 1 BA DIR 3 EN 1 BA 3 EN 2 AB 3 EN 2 AB (2) (18) (2) (18) A1 1 B1 A1 1 B1 2 2 (3) (17) (3) (17) A2 B2 A2 B2 (4) (16) (4) (16) A3 B3 A3 B3 (5) (15) (5) (15) A4 B4 A4 B4 (6) (14) (6) (14) A5 B5 A5 B5 (7) (13) (7) (13) A6 B6 A6 B6 (8) (12) (8) (12) A7 B7 A7 B7 (9) (11) (9) (11) A8 B8 A8 B8 2 2014-03-01