TC74HC85AF

TC74HC85AP/AF/AFN TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74HC85AP,TC74HC85AF,TC74HC85AFN 4-Bit Magnitude Comparator The TC74HC85A is a high speed CMOS 4 BIT MAGNITUDE COMPARATOR fabricated with silicon gate C2MOS 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. Note: xxxFN (JEDEC SOP) is not available in Japan. TC74HC85AP Features • • • • • • • • High speed: tpd = 22 ns (typ.) at VCC = 5 V Low power dissipation: ICC = 4 μA (max) at Ta = 25°C High noise immunity: VNIH = VNIL = 28% VCC (min) Output drive capability: 10 LSTTL loads Symmetrical output impedance: |IOH| = IOL = 4 mA (min) ∼ Balanced propagation delays: tpLH − tpHL Wide operating voltage range: VCC (opr) = 2~6 V Pin and function compatible with 74LS85 TC74HC85AF TC74HC85AFN Pin Assignment Weight DIP16-P-300-2.54A SOP16-P-300-1.27A SOL16-P-150-1.27 : 1.00 g (typ.) : 0.18 g (typ.) : 0.13 g (typ.) 1 2007-10-01 TC74HC85AP/AF/AFN IEC Logic Symbol Truth Table Comparing Inputs A3 > B3 A3 = B3 A3 = B3 A3 = B3 X A2 > B2 A2 = B2 A2 = B2 X X A1 > B1 A1 = B1 X X X A0 > B0 Cascading Inputs A>B X X X X L X A3 = B3, A2 = B2, A1 = B1, A0 = B0 L H H A3 = B3 A3 = B 3 A3 = B 3 A3 < B3 A2 = B2 A2 = B2 A2 < B2 X A1 = B1 A1 < B1 X X A0 < B0 X X X X X X X AB H H H H H L L H L L L L L Outputs A [B] Cascading Inputs A>B X H A=B X L H L X AB H H L L L Outputs A=B L L H L L A