CD74HCT138E TI Decoder/Demultiplexer | 16-PDIP | 3-to-8 Line, High-Speed CMOS

Product Overview

The CD74HCT138E from Texas Instruments is a high-speed CMOS 3-to-8 line decoder/demultiplexer. It is designed for memory decoding and data routing applications where low power dissipation and high noise immunity are required. The device features three binary select inputs (A0, A1, A2) and three enable inputs (E1, E2, E3). When the device is enabled, one of the eight outputs (Y0–Y7) is selected and driven low, while all other outputs remain high. The CD74HCT138E is fabricated with silicon gate technology, providing the speed of LSTTL combined with the low power consumption of CMOS. It is available in a 16-pin PDIP package, making it suitable for through-hole PCB assembly.

Detailed Technical Specifications

Key Features

• High-speed CMOS technology with LSTTL-compatible inputs
• Low power consumption: 80 µA (max) ICC
• 3-to-8 line decoder/demultiplexer with three enable inputs
• Balanced propagation delays and transition times
• Standard outputs: one output low, others high when enabled
• Wide operating voltage range: 4.5 V to 5.5 V
• High noise immunity: 30% of VCC
• Available in 16-pin PDIP package

Target Applications

The CD74HCT138E is ideal for memory decoding in microcontroller systems, such as in 5G base station control boards, automotive dashboard displays, industrial PLCs, and consumer electronics like set-top boxes. It can also be used for data routing in communication equipment, address decoding in FPGA configuration, and as a demultiplexer in test equipment.

Global Supply Chain & Wholesale Solutions

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產品概述

CD74HCT138E 是德州儀器 (TI) 生產的高速 CMOS 3 線轉 8 線解碼器/多路分配器。它專為需要低功耗和高抗噪能力的存儲器解碼和數據路由應用而設計。該器件具有三個二進制選擇輸入 (A0, A1, A2) 和三個使能輸入 (E1, E2, E3)。當器件被使能時，八個輸出 (Y0–Y7) 中的一個被選中並驅動為低電平，而所有其他輸出保持高電平。CD74HCT138E 採用硅柵極技術製造，兼具 LSTTL 的速度和 CMOS 的低功耗。它採用 16 引腳 PDIP 封裝，適合通孔 PCB 組裝。

詳細技術參數

核心特性

• 高速 CMOS 技術，輸入與 LSTTL 兼容
• 低功耗：ICC 最大 80 µA
• 3 線轉 8 線解碼器/多路分配器，帶三個使能輸入
• 平衡的傳播延遲和轉換時間
• 標準輸出：使能時一個輸出為低，其他為高
• 寬工作電壓範圍：4.5 V 至 5.5 V
• 高抗噪能力：VCC 的 30%
• 提供 16 引腳 PDIP 封裝

典型應用場景

CD74HCT138E 非常適合微控制器系統中的存儲器解碼，例如 5G 基站控制板、汽車儀表盤顯示、工業 PLC 以及消費電子產品如機頂盒。它還可用於通信設備中的數據路由、FPGA 配置中的地址解碼，以及測試設備中的多路分配器。

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HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
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