These Low-Power Schottky 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. The clear function is synchronous, and a low level at the clear input clears the register on the next low-to-high transition of the clock.

• Multiplexed Inputs/Outputs Provide Improved Bit Density
• Four Modes of Operation:
  • 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
• Typical Power Dissipation … 175 mW
• Exceptionally Stable Shift (Clock) Frequency … 25 MHz
• Applications:
  • Stacked or Push-Down Registers,
  • Buffer Storage, and
  • Accumulator Registers
• SN54LS299 and SN74LS299 Are Similar But Have Direct Overriding Clear

• Configuration
• Universal
• Bits (#)
• 8
• Technology Family
• LS
• Supply voltage (Min) (V)
• 4.5
• Supply voltage (Max) (V)
• 5.5
• Input type
• Bipolar
• Output type
• Push-Pull
• Clock Frequency (MHz)
• 25
• IOL (Max) (mA)
• 24
• IOH (Max) (mA)
• -2.6
• ICC (Max) (uA)
• 21000
• Features
• High speed (tpd 10-50ns)

SN54LS323的完整型号有：SN54LS323J、SNJ54LS323FK、SNJ54LS323J，以下是这些产品的关键参数及官网采购报价：

SN54LS323J，工作温度：-55 to 125，封装：CDIP (J)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SN54LS323J的批量USD价格：8.715（1000+）

SNJ54LS323FK，工作温度：-55 to 125，封装：LCCC (FK)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54LS323FK的批量USD价格：20.523（1000+）

SNJ54LS323J，工作温度：-55 to 125，封装：CDIP (J)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54LS323J的批量USD价格：15.251（1000+）