This part is a kind of semiconductor called 74192.

Function of this product has SYNCHRONOUS UP/DOWN DECADE(/BINARY) COUNTER.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

M54/M74HC192 M54/M74HC193 HC192 - SYNCHRONOUS UP/DOWN DECADE COUNTER HC193 - SYNCHRONOUS UP/DOWN BINARY COUNTER . . . . . . . . HIGH SPEED fMAX = 54 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 10 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE |IOH| = IOL = 4 mA (MIN.) BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V PIN AND FUNCTION COMPATIBLE WITH 54/74LS192-193 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) DESCRIPTION The M54/74HC192/193 are ahigh speed CMOSSYNCHRONOUS UP/DOWN DECADE COUNTERS fabricated in silicon gate C2MOS technology. They have the same high speed performance of LSTTL combined with [ ... ]

74192 PDF Datasheet Download