M74HC688

M74HC688 8 BIT EQUALITY COMPARATOR s HIGH SPEED: tPD = 17ns (TYP.) at VCC = 6V s LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C s HIGH NOISE IMMUNITY: )VNIH = VNIL = 28 % VCC (MIN.) t(ss SYMMETRICAL OUTPUT IMPEDANCE: c|IOH| = IOL = 4mA (MIN) us BALANCED PROPAGATION DELAYS: dtPLH ≅ tPHL ros WIDE OPERATING VOLTAGE RANGE: PVCC (OPR) = 2V to 6V s PIN AND FUNCTION COMPATIBLE WITH te74 SERIES 688 oleDESCRIPTION bsThe M74HC688 is an high speed CMOS 8 BIT EQUALITY COMPARATOR fabricated with silicon Ogate C2MOS technology. -The M74HC688 compares bit for bit two 8-bit t(s)words applied on inputs P0 - P7 and inputs Q0 - Q7 and indicates whether or not they are equal. A DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSOP M74HC688B1R M74HC688M1R T&R M74HC688RM13TR M74HC688TTR single active low enable is provided to facilitate cascading several packages to enable comparison of words greater than 8 bits. All inputs are equipped with protection circuits against static discharge and transient excess voltage. Obsolete ProducPIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/9 M74HC688 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1 G Enable Input (Active LOW) 2, 4, 6, 8, 11, P0 to P7 Word Inputs 13, 15, 17 3, 5, 7, 9, 12, Q0 to Q7 Word Outputs 14, 16, 18 19 P = Q Equal to Output 10 GND Ground (0V) 20 VCC Positive Supply Voltage t(s)TRUTH TABLE te ProducX: Don’t Care P, Q P=Q P <> Q X Obsolete Product(s) - ObsoleLOGIC DIA...