TC74ACT521F(F) Toshiba

TC74ACT521P/F TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74ACT521P, TC74ACT521F 8-Bit Equality Comparator TC74ACT521P The TC74ACT521 is an advanced high speed CMOS 8-BIT DIGITAL COMPARATOR fabricated with silicon gate and 2 double-layer metal wiring C MOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. This device 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. TC74ACT521F It compares two 8-bit binary or BCD words applied inputs P ~P , and inputs Q ~Q , and indicates whether or not they are 0 7 0 7 equal. A signal active low enable is provided to facilitate cascading of several packages to compare of words greater than 8 bits. All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features Weight High speed: t = 6.4 ns (typ.) at V = 5 V pd CC DIP20-P-300-2.54A : 1.30 g (typ.) SOP20-P-300-1.27A : 0.22 g (typ.) Low power dissipation: I = 8 A (max) at Ta = 25C CC Compatible with TTL outputs: V = 0.8 V (max) IL V = 2.0 V (min) IH Symmetrical output impedance: I = I = 24 mA (min) OH OL Capability of driving 50 transmission lines. Balanced propagation delays: t t pLH pHL Pin and function compatible with 74F521 Pin Assignment Start of commercial production 1989-11 1 2014-03-01 TC74ACT521P/F IEC Logic Symbol Truth Table Inputs Output P, Q G P = Q P = Q L L P Q L H X H H X: Dont care System Diagram 2 2014-03-01