TC74HC85AP/AF/AFN TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC85AP,TC74HC85AF,TC74HC85AFN 4-Bit Magnitude Comparator Note: xxxFN (JEDEC SOP) is not available in Japan. The TC74HC85A is a high speed CMOS 4 BIT MAGNITUDE 2 TC74HC85AP COMPARATOR fabricated with silicon gate C MOS technology. It achieves the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. The TC74HC85A compares tow 4-bit words applied to inputs A0-A3 and B0-B3, and provides a high voltage level on one of three outputs: A > B, A < B, or A = B. All inputs are equipped with protection circuits against static discharge or transient excess voltage. TC74HC85AF Features High speed: t = 22 ns (typ.) at V = 5 V pd CC Low power dissipation: I = 4 A (max) at Ta = 25C CC High noise immunity: V = V = 28% V (min) NIH NIL CC Output drive capability: 10 LSTTL loads Symmetrical output impedance: I = I = 4 mA (min) OH OL Balanced propagation delays: t t pLH pHL Wide operating voltage range: V (opr) = 2~6 V CC TC74HC85AFN Pin and function compatible with 74LS85 Pin Assignment Weight DIP16-P-300-2.54A : 1.00 g (typ.) SOP16-P-300-1.27A : 0.18 g (typ.) SOL16-P-150-1.27 : 0.13 g (typ.) 1 2007-10-01 TC74HC85AP/AF/AFN IEC Logic Symbol Truth Table Cascading Inputs Outputs Comparing Inputs A > BA < BA = BA > BA < BA = B A3 > B3 X X X X X X H L L A3 = B3 A2 > B2 X X X X X H L L A3 = B3 A2 = B2 A1 > B1 X X X X H L L A3 = B3 A2 = B2 A1 = B1 A0 > B0 X X X H L L L L L H H L X X H L L H A3 = B3, A2 = B2, A1 = B1, A0 = B0 L H L L H L H L L H L L H H L L L L A3 = B3 A2 = B2 A1 = B1 A0 < B0 X X X L H L A3 = B3 A2 = B2 A1 < B1 X X X X L H L A3 = B3 A2 < B2 X X X X X L H L A3 < B3 X X X X X X L H L X: Dont care 2 2007-10-01