TC74LVX244F(F) Toshiba

TC74LVX240,244F/FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LVX240F, TC74LVX240FT TC74LVX244F, TC74LVX244FT Octal Bus Buffer TC74LVX240 Inverted, 3-State Outputs TC74LVX240F, TC74LVX244F TC74LVX244 Non-Inverted, 3-State Outputs The TC74LVX240,244F/ FT is a high-speed CMOS OCTAL BUS BUFFER fabricated using silicon gate CMOS technology. Designed for use in 3-V systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. This device is suitable for low-voltage and battery operated systems. The TC74LVX240 is an inverting 3-state buffer while the TC74LVX240FT, TC74LVX244FT TC74LVX244 is non-inverting. Both devices have two active-low output enables. These devices are designed to be used in such applications as 3-state memory address drivers. An input protection circuit ensures that 0 to 5.5V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5V to 3V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. Weight Features SOP20-P-300-1.27A : 0.22 g (typ.) High-speed: t = 4.7 ns (typ.) (V = 3.3 V) TSSOP20-P-0044-0.65A : 0.08 g (typ.) pd CC Low power dissipation: I = 4 A (max) (Ta = 25C) CC Input voltage level: V = 0.8 V (max) (V = 3 V) IL CC V = 2.0 V (min) (V = 3 V) IH CC Power-down protection provided on all inputs Balanced propagation delays: t t pLH pHL Low niose: V = 0.8 V (max) OLP Pin and function compatible with 74HC240/244 Start of commercial production 1993-01 1 2014-03-01 TC74LVX240,244F/FT Pin Assignment (top view) TC74LVX240 TC74LVX244 1G 1 20 V 1G 1 20 V CC CC 1A1 2 19 2G 1A1 2 19 2G 18 1Y1 2Y4 18 1Y1 2Y4 3 3 1A2 4 17 2A4 1A2 4 17 2A4 5 16 1Y2 2Y3 5 16 1Y2 2Y3 1A3 6 15 2A3 1A3 6 15 2A3 7 14 1Y3 2Y2 7 14 1Y3 2Y2 1A4 8 13 2A2 1A4 8 13 2A2 2 Y1 9 12 1Y4 2Y1 9 12 1Y4 GND 10 11 2A1 GND 10 11 2A1 IEC Logic Symbol TC74LVX240 TC74LVX244 (1) (1) 1G EN 1G EN (2) (18) (2) (18) 1A1 1Y1 1A1 1Y1 (4) (16) (4) (16) 1A2 1Y2 1A2 1Y2 (6) (14) (6) (14) 1A3 1Y3 1A3 1Y3 (8) (12) (8) (12) 1A4 1Y4 1A4 1Y4 (19) (19) 2G EN 2G EN (11) (9) (11) (9) 2A1 2Y1 2A1 2Y1 (13) (7) (13) (7) 2A2 2Y2 2A2 2Y2 (15) (5) (15) (5) 2A3 2Y3 2A3 2Y3 (17) (3) (17) (3) 2A4 2Y4 2A4 2Y4 Truth Table Inputs Outputs G A Y n n (244) Y n (240) L L L H L H H L H X Z Z X: Dont care Z: High impedance 2 2014-03-01