CD74HC138E TI Decoder/Demultiplexer | 16-PDIP | 3-to-8 Line, High-Speed CMOS

Product Overview

The CD74HC138E from Texas Instruments is a high-speed CMOS 3-to-8 line decoder/demultiplexer. It is designed for memory decoding and data routing applications in digital systems. The device features three binary select inputs (A0, A1, A2) and three enable inputs (E1, E2, E3), providing flexibility in enabling and disabling the outputs. The active-low outputs (Y0–Y7) are capable of driving up to 10 LSTTL loads. The CD74HC138E is housed in a 16-pin PDIP package, making it suitable for through-hole PCB assembly.

Detailed Technical Specifications

Key Features

• High-speed CMOS technology with typical propagation delay of 15ns
• Low power consumption: 80µA (max) at 25°C
• 3-to-8 line decoder/demultiplexer function
• Three enable inputs for cascading and expansion
• Active-low outputs for direct interface with logic
• Wide operating voltage range: 2V to 6V
• High noise immunity: typically VNIH = VNIL = 28% of VCC
• Balanced propagation delays: tPLH = tPHL
• Compatible with LSTTL logic levels
• Standard 16-pin PDIP package for easy prototyping

Target Applications

• Memory decoding in microcontroller systems (e.g., Arduino, STM32)
• Data routing in communication equipment (e.g., 5G base station control boards)
• Address decoding in industrial PLCs
• Display driver selection in automotive dashboards
• Multiplexing in test and measurement instruments
• Logic expansion in FPGA prototyping boards

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for CD74HC138E. Our core advantages include:

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• Original Factory Packaging: We maintain original factory packaging and seals to ensure ESD protection and physical integrity.

產品概述

CD74HC138E 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。它專為數字系統中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)，提供靈活的輸出使能控制。低電平有效輸出 (Y0–Y7) 能夠驅動多達 10 個 LSTTL 負載。CD74HC138E 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，典型傳播延遲 15ns
• 低功耗：25°C 時最大 80µA
• 3 線轉 8 線解碼器/多路分配器功能
• 三個使能輸入，便於級聯和擴展
• 低電平有效輸出，可直接與邏輯電路接口
• 寬工作電壓範圍：2V 至 6V
• 高抗噪聲能力：典型 VNIH = VNIL = 28% VCC
• 平衡傳播延遲：tPLH = tPHL
• 與 LSTTL 邏輯電平兼容
• 標準 16 引腳 PDIP 封裝，易於原型設計

典型應用場景

• 微控制器系統中的存儲器解碼（例如 Arduino、STM32）
• 通信設備中的數據路由（例如 5G 基站控制板）
• 工業 PLC 中的地址解碼
• 汽車儀表盤中的顯示驅動選擇
• 測試和測量儀器中的多路復用
• FPGA 原型板中的邏輯擴展

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HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
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