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Shift registers

SN74F299

ACTIVE

Universal shift / storage registers

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Data sheet

SN74F299

ACTIVE
Data sheet Order now

Product details

Configuration Universal Bits (#) 8 Technology family F Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Input type Bipolar Output type 3-State Clock frequency (MHz) 70 IOL (max) (mA) 24 IOH (max) (mA) -3 Supply current (max) (µA) 95000 Features High speed (tpd 10-50ns) Operating temperature range (°C) 0 to 70 Rating Catalog
Configuration Universal Bits (#) 8 Technology family F Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Input type Bipolar Output type 3-State Clock frequency (MHz) 70 IOL (max) (mA) 24 IOH (max) (mA) -3 Supply current (max) (µA) 95000 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
  • Four Modes of Operation:
    • Hold (Store)
    • Shift Right
    • Shift Left
    • Load Data
  • Operates With Outputs Enabled or at High Impedance
  • 3-State Outputs Drive Bus Lines Directly
  • Can Be Cascaded for N-Bit Word Lengths
  • Direct Overriding Clear
  • Applications:
    • Stacked or Push-Down Registers
    • Buffer Storage
    • Accumulator Registers
  • Four Modes of Operation:
    • Hold (Store)
    • Shift Right
    • Shift Left
    • Load Data
  • Operates With Outputs Enabled or at High Impedance
  • 3-State Outputs Drive Bus Lines Directly
  • Can Be Cascaded for N-Bit Word Lengths
  • Direct Overriding Clear
  • Applications:
    • Stacked or Push-Down Registers
    • Buffer Storage
    • Accumulator Registers

These 8-bit universal shift/storage registers feature multiplexed I/O ports to achieve full 8-bit data handling in a single 20-pin package. Two function-select (S0, S1) inputs and two output-enable (OE1\, OE2\) inputs can be used to choose the modes of operation listed in the function table.

Synchronous parallel loading is accomplished by taking both S0 and S1 high. This places the 3-state outputs in a high-impedance state and permits data that is applied on the I/O ports to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. Clearing occurs when the clear (CLR\) input is low. Taking either OE1\ or OE2\ high disables the outputs but has no effect on clearing, shifting, or storage of data.

These 8-bit universal shift/storage registers feature multiplexed I/O ports to achieve full 8-bit data handling in a single 20-pin package. Two function-select (S0, S1) inputs and two output-enable (OE1\, OE2\) inputs can be used to choose the modes of operation listed in the function table.

Synchronous parallel loading is accomplished by taking both S0 and S1 high. This places the 3-state outputs in a high-impedance state and permits data that is applied on the I/O ports to be clocked into the register. Reading out of the register can be accomplished while the outputs are enabled in any mode. Clearing occurs when the clear (CLR\) input is low. Taking either OE1\ or OE2\ high disables the outputs but has no effect on clearing, shifting, or storage of data.
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* Data sheet SN54F299, SN74F299 datasheet (Rev. B) 16 Apr 2004

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