The SN74AHCT138Q 3-line to 8-line decoder/demultiplexer is designed to be used in high-performance memory-decoding and data-routing applications that require very short propagation-delay times. In high-performance memory systems, this decoder 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 this decoder and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoder 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.

• Qualified for Automotive Applications
• EPIC? (Enhanced-Performance Implanted CMOS) Process
• Inputs Are TTL-Voltage Compatible
• Designed Specifically for High-Speed Memory Decoders and Data-Transmission Systems
• Incorporates Three Enable Inputs to Simplify Cascading and/or Data Reception
• Latch-Up Performance Exceeds 250 mA Per JESD 17
• ESD Protection Exceeds 2000 V Per MIL-STD-833, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)

EPIC is a trademark of Texas Instruments.

• Technology Family
• AHCT
• Number of channels (#)
• 1
• Operating temperature range (C)
• -40 to 125
• Rating
• Automotive
• ICC (Max) (uA)
• 40

SN74AHCT138Q-Q1的完整型号有：CAHCT138QPWRG4Q1、SN74AHCT138QDRQ1，以下是这些产品的关键参数及官网采购报价：

CAHCT138QPWRG4Q1，工作温度：-40 to 125，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CAHCT138QPWRG4Q1的批量USD价格：.261（1000+）

SN74AHCT138QDRQ1，工作温度：-40 to 125，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SN74AHCT138QDRQ1的批量USD价格：.236（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。