TC74VCX541FT/FK/FTG TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VCX541FT, TC74VCX541FK, TC74VCX541FTG Low-Voltage Octal Bus Buffer with 3.6 V Tolerant Inputs and Outputs The TC74VCX541 is a high performance CMOS octal bus buffer TC74VCX541FT which is guaranteed to operate from 1.2-V to 3.6-V. Designed for use in 1.5V, 1.8 V, 2.5 V or 3.3 V systems, it achieves high speed operation while maintaing the CMOS low power dissipation. It is also designed with over voltage tolerant inputs and outputs up to 3.6 V. The device is a non-inverting 3-state buffer having two active-low output enables. When either OE1 or OE2 are high, the terminal outputs are in the high-impedance state. This device is designed to be used with 3-state memory address drivers, etc. All inputs are equipped with protection circuits against static TC74VCX541FK discharge. Features (Note 1) Low voltage operation: V = 1.2 to 3.6 V CC High speed operation: t = 3.5 ns (max) (V = 3.0 to 3.6 V) pd CC t = 4.2 ns (max) (V = 2.3 to 2.7 V) pd CC t = 8.4 ns (max) (V = 1.65 to 1.95 V) pd CC t = 16.8 ns (max) (V = 1.4 to 1.6 V) pd CC TC74VCX541FTG t = 42.0 ns (max) (V = 1.2 V) pd CC 3.6 V tolerant inputs and outputs. Output current: I /I = 24 mA (min) (V = 3.0 V) OH OL CC I /I = 18 mA (min) (V = 2.3 V) OH OL CC I /I = 6 mA (min) (V = 1.65 V) OH OL CC I /I = 2 mA (min) (V = 1.4 V) OH OL CC VQON20-0404-0.50 Latch-up performance: 300 mA Weight TSSOP20-P-0044-0.65A : 0.08 g (typ.) ESD performance: Machine model 200 V VSSOP20-P-0030-0.50 : 0.03 g (typ.) Human body model 2000 V VQON20-P-0404-0.50 : 0.0145g (typ.) Package: TSSOP VSSOP (US) VQON Power down protection is provided on all inputs and outputs. Note 1: When mounting VQON package, the type of recommended flux is RA or RMA. Start of commercial production 1998-06 1 2014-03-01 TC74VCX541FT/FK/FTG Pin Assignment (top view) FT(TSSOP20-P-0044-0.65) FTG(VQON20-P-0404-0.50) FK(VSSOP20-P-0030-0.50) A1 OE1 VCC OE2 Y1 OE1 1 20 V CC 20 19 17 16 18 A1 2 19 OE2 A2 18 Y1 3 A2 1 15 Y2 A3 4 17 Y2 A3 2 14 Y3 A4 5 16 Y3 A4 3 13 Y4 A5 6 15 Y4 A5 4 12 Y5 A6 7 14 Y5 A6 5 11 Y6 A7 8 13 Y6 6 7 8 9 10 A8 9 12 Y7 A7 A8 GND Y8 Y7 GND 10 11 Y8 IEC Logic Level (1) & OE1 EN (19) OE2 (2) (18) A1 Y1 (3) (17) A2 Y2 (4) (16) A3 Y3 (5) (15) A4 Y4 (6) (14) A5 Y5 (7) (13) A6 Y6 (8) (12) A7 Y7 (9) (11) A8 Y8 Truth Table Inputs Outputs OE1 OE2 A n H X X Z X H X Z L L H H L L L L X: Dont care Z: High impedance 2 2014-03-01