This part is a kind of semiconductor called 74163.
Function of this product has SYNCHRONOUS PRESETTABLE 4-BIT COUNTER.
Manufacturers : SGS-THOMSON
Image and pinout :
Some of the text within the PDF file :
M54/74HC160/161 M54/74HC162/163 SYNCHRONOUS PRESETTABLE 4-BIT COUNTER . HIGH SPEED fMAX = 63 MHz (TYP.) AT VCC = 5 V . LOW POWER DISSIPATION ICC = 4 µA (MAX.) AT 25 °C . OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS . BALANCED PROPAGATION DELAYS tPLH = tPHL . HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) . WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V . PIN AND FUNCTION COMPATIBLE WITH 54/74LS160 ∼ 163 B1R (Plastic Package) F1R (Ceramic Package) M 1R (Micro Package) C1R (Chip Carrier) DESCRIPTION ORDER CODES : M54HCXXXF1R M74HCXXXM1R M74HCXXXB1R M74HCXXXC1R M54/74HC160 Decade, Asynchronous Clear M54/74HC161 Binary, Asynchronous Clear M54/74HC162 Decade, Synchronous Clear M54/74HC163 Binary, Synchronous Clear PIN CONNECTIONS (top view) The M54/74HC160, 161, 162 and 163 are [ ... ]