This part is a kind of semiconductor called 74374.

Function of this product has Octal D-Type Flip Flop.

Manufacturers : SGS-Thomson

Image and pinout :

Some of the text within the PDF file :

M54/74HC374 M54/74HC534 OCTAL D-TYPE FLIP FLOP WITH 3 STATE OUTPUT HC374 NON INVERTING - HC534 INVERTING HIGH SPEED fMAX = 77 MHz (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 15 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE IOL = IOH= 6 mA (MIN.) BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V PIN AND FUNCTION COMPATIBLE WITH 54/74LS374/534 DESCRIPTION The M54/74HC374, M54/74HC534, are high speed CMOS OCTAL D-TYPE FLIP FLOP WITH 3-STATE OUTPUTS fabricated with in silicon gate C 2MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power comsuption. These8-bit D-type flip-flops are c [ ... ]

74374 PDF Datasheet Download