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.

• 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

• 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
• ICC (Max) (uA)
• 53000
• Features
• High speed (tpd 10-50ns)

SN74LS299的完整型号有：SN74LS299DW、SN74LS299N，以下是这些产品的关键参数及官网采购报价：

SN74LS299DW，工作温度：0 to 70，封装：SOIC (DW)-20，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74LS299DW的批量USD价格：1.735（1000+）

SN74LS299N，工作温度：0 to 70，封装：PDIP (N)-20，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网SN74LS299N的批量USD价格：1.995（1000+）

14-24-LOGIC-EVM 支持 14 到 24 引脚 PW、DB、D、DW、NS、DYY 和 DGV 封装的通用逻辑 EVM

该 EVM 设计用于支持采用 14 至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。