The ’AHC138 decoders/demultiplexers are designed for high-performance memory-decoding and data-routing applications that require very short propagation-delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.

The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications.

• Operating Range 2-V to 5.5-V VCC
• Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems
• Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception
• Latch-Up Performance Exceeds 250 mA Per JESD 17
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)

• Technology Family
• AHC
• Number of channels (#)
• 1
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog
• ICC (Max) (uA)
• 40

SN74AHC138的完整型号有：SN74AHC138D、SN74AHC138DBR、SN74AHC138DGVR、SN74AHC138DR、SN74AHC138N、SN74AHC138NSR、SN74AHC138PW、SN74AHC138PWR、SN74AHC138RGYR，以下是这些产品的关键参数及官网采购报价：

SN74AHC138D，工作温度：-40 to 85，封装：SOIC (D)-16，包装数量MPQ：40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SN74AHC138D的批量USD价格：.349（1000+）

SN74AHC138DBR，工作温度：-40 to 85，封装：SSOP (DB)-16，包装数量MPQ：2000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SN74AHC138DBR的批量USD价格：.144（1000+）

SN74AHC138DGVR，工作温度：-40 to 85，封装：TVSOP (DGV)-16，包装数量MPQ：2000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SN74AHC138DGVR的批量USD价格：.131（1000+）

SN74AHC138DR，工作温度：-40 to 85，封装：SOIC (D)-16，包装数量MPQ：2500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SN74AHC138DR的批量USD价格：.092（1000+）

SN74AHC138N，工作温度：-40 to 85，封装：PDIP (N)-16，包装数量MPQ：25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SN74AHC138N的批量USD价格：.171（1000+）

SN74AHC138NSR，工作温度：-40 to 85，封装：SO (NS)-16，包装数量MPQ：2000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SN74AHC138NSR的批量USD价格：.164（1000+）

SN74AHC138PW，工作温度：-40 to 85，封装：TSSOP (PW)-16，包装数量MPQ：90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SN74AHC138PW的批量USD价格：.349（1000+）

SN74AHC138PWR，工作温度：-40 to 85，封装：TSSOP (PW)-16，包装数量MPQ：2000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SN74AHC138PWR的批量USD价格：.079（1000+）

SN74AHC138RGYR，工作温度：-40 to 85，封装：VQFN (RGY)-16，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网SN74AHC138RGYR的批量USD价格：.144（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。

14-24-NL-LOGIC-EVM — Generic 14 through 24 pin non-leaded package evaluation module

Flexible EVM designed to support any logic or translation device that has a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.