The 74LS290 are high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two section and either a divide-by-five (LS290) or divide-by-eight (LS293) section which are triggered by a HIGH-to-LOW transition on the clock inputs. Each section can be used separately or tied together (Q to CP)to form BCD, Bi-quinary, or Modulo-16 counters. Both of the counters have a 2-input gated Master Reset (Clear), and the LS290 also has a 2-input gated Master Set (Preset 9).

Features :-

• Corner Power Pin Versions of the LS90 and LS93
• Low Power Consumption Typically 45mW
• High Count Rates Typically 42 MHz
• Choice of Counting Modes -BCD, Bi-Quinary, Binary
• Input Clamp Diodes Limit High Speed Termination Effects

Specifications :-

• Supply Voltage : 4.75 - 5.25V
• Input HIGH Voltage : 2.0V
• Input LOW Voltage : 0.8V
• Input Clamp Diode Voltage : -1.5V
• Output LOW Voltage : 0.5V
• Short Circuit Current : -100mA

Package Includes :- 

1 X 74LS290 4-Bit Binary Ripple Counter IC (74290) DIP-14 Package