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Shift registers

SN74LS299

ACTIVE

Universal shift / storage registers

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Data sheet

SN74LS299

ACTIVE
Data sheet Order now

Product details

Configuration Universal Bits (#) 8 Technology family LS Supply voltage (min) (V) 4.75 Supply voltage (max) (V) 5.25 Input type Bipolar Output type Push-Pull Clock frequency (MHz) 25 IOL (max) (mA) 24 IOH (max) (mA) -2.6 Supply current (max) (µA) 53000 Features High speed (tpd 10-50ns) Operating temperature range (°C) 0 to 70 Rating Catalog
Configuration Universal Bits (#) 8 Technology family LS Supply voltage (min) (V) 4.75 Supply voltage (max) (V) 5.25 Input type Bipolar Output type Push-Pull Clock frequency (MHz) 25 IOL (max) (mA) 24 IOH (max) (mA) -2.6 Supply current (max) (µA) 53000 Features High speed (tpd 10-50ns) Operating temperature range (°C) 0 to 70 Rating Catalog
PDIP (N) 20 228.702 mm² 24.33 x 9.4 SOIC (DW) 20 131.84 mm² 12.8 x 10.3
  • Multiplexed Inputs/Outputs Provide Improved Bit Density
  • Four Modes of Operations:
    • Hold (Store)
    • Shift Left
    • Shift Right
    • Load Data
  • Operates with Outputs Enabled or at High Z
  • 3-State Outputs Drive Bus Lines Directly
  • Can Be Cascaded for N-Bit Word Lengths
  • SN54LS323 and SN74LS323 Are Similar But Have Synchronous Clear
  • Applications:
    • Stacked or Push-Down Registers Buffer Storage, and Accumulator Registers

 
  • Multiplexed Inputs/Outputs Provide Improved Bit Density
  • Four Modes of Operations:
    • Hold (Store)
    • Shift Left
    • Shift Right
    • Load Data
  • Operates with Outputs Enabled or at High Z
  • 3-State Outputs Drive Bus Lines Directly
  • Can Be Cascaded for N-Bit Word Lengths
  • SN54LS323 and SN74LS323 Are Similar But Have Synchronous Clear
  • Applications:
    • Stacked or Push-Down Registers Buffer Storage, and Accumulator Registers

 

These Schottky TTL eight-bit universal registers feature multiplexed inputs/outputs to achieve full eight-bit data handling in a single 20-pin package. Two function-select inputs and two output-control inputs can be used to choose the modes of operation listed in the function table.

Synchronous parallel loading is accomplished by taking both function-select lines, S0 and S1, high. This places the three-state outputs in a high-impedance state, which permits data that is applied on the input/output lines to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. A direct overriding input is provided to clear the register whether the outputs are enabled or off.

 

These Schottky TTL eight-bit universal registers feature multiplexed inputs/outputs to achieve full eight-bit data handling in a single 20-pin package. Two function-select inputs and two output-control inputs can be used to choose the modes of operation listed in the function table.

Synchronous parallel loading is accomplished by taking both function-select lines, S0 and S1, high. This places the three-state outputs in a high-impedance state, which permits data that is applied on the input/output lines to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. A direct overriding input is provided to clear the register whether the outputs are enabled or off.

 
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* Data sheet 8-Bit Universal Shift/Storage Registers datasheet 01 Mar 1988

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