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These monolithic, positive-74LS280 9-Bit Odd-Even Parity Generator Checker IC (74280) DIP-14 Packageedge-triggered flipflops utilize TTL circuitry to implement D-type flip-flop logic with a direct clear input. Information at the D inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse. When the clock input is at either the high or low level, the D input signal has no effect ar the output. These flip-flops are guaranteed to respond to clock frequencies ranging form 0 to 30 megahertz while maximum clock frequency is typically 40 megahertz. Typical power dissipation is 39 milliwatts per flip-flop for the ′273 and 10 milliwatts for the ′LS273. Features :- Contains Eight Flip-Flops With Single-Rail Outputs Buffered Clock and Direct Clear Inputs Individual Data Input to Each Flip-Flop Specifications :- Supply Voltage : 4.75 – 5.25V High-level output current : -800µA Low-level output current : 16mA Clock frequency : 30MHz Width of clock or clear pulse : 16.5ns Package Includes :- 1 X 74LS273 Octal D-type Flip-Flop with Reset IC (74273) DIP-20 Package ₹ 34.00
74LS298 Quad 2-Input Multiplexer IC (74298) DIP-16 Package ₹ 45.00
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74LS290 4-Bit Binary Ripple Counter IC (74290) DIP-14 Package

₹ 39.00

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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

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