HD74HC688

HD74HC688 8-bit Magnitude Comparator REJ03D0643–0200 (Previous ADE-205-529) Rev.2.00 Mar 30, 2006 Description The HD74HC688 compares bit for bit two 8-bit words and indicates whether or not they are equal. The P=Q output indicates equality when it is low. A single active low enable is provided to facilitate cascading of several packages and enable comparison of words greater than 8-bits. This device is useful in memory block decoding applications, where memory block enable signals must be generated from computer address information. Features High Speed Operation: tpd (P or Q to Output) = 17 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation HD74HC688P DILP-20 pin (JEDEC) PRDP0020AC-B (DP-20NEV) P HD74H...