CD74HC237PWR TI Decoder/Demultiplexer | 16-TSSOP | 3-to-8, High-Speed CMOS

Product Overview

The CD74HC237PWR from Texas Instruments is a high-speed CMOS 3-to-8 line decoder/demultiplexer with address latches. It is designed for memory decoding and data routing applications requiring low power consumption and high noise immunity. The device features three address inputs (A0, A1, A2), three latch enable inputs (LE1, LE2, LE3), and eight active-low outputs (Y0–Y7). When latch enables are active, the address inputs are stored; when any latch enable is inactive, the outputs are held in the previous state. The CD74HC237PWR operates over a wide voltage range of 2V to 6V and is characterized for operation from -55°C to +125°C. It is available in a 16-pin TSSOP package, making it suitable for space-constrained designs.

Detailed Technical Specifications

Key Features

• 3-to-8 line decoder/demultiplexer with address latches
• High-speed CMOS technology with typical propagation delay of 15ns
• Wide operating voltage range: 2V to 6V
• Low power consumption: 80µA (max) ICC
• High noise immunity: typical VNH = 28% of VCC
• Balanced propagation delays: tPLH = tPHL
• Outputs drive up to 10 LSTTL loads
• Inputs are TTL voltage compatible
• Available in 16-pin TSSOP package for compact designs

Target Applications

The CD74HC237PWR is ideal for a variety of applications including:

• Memory decoding in microcontrollers and FPGAs (e.g., STM32F4, Xilinx Spartan-6)
• Data routing in communication systems (e.g., 5G base station control boards)
• Address decoding in automotive infotainment systems (e.g., dashboard displays)
• Industrial automation PLCs (e.g., Siemens S7-1200)
• Consumer electronics like smart home hubs (e.g., Amazon Echo)

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產品概述

CD74HC237PWR 是德州儀器 (TI) 的一款高速 CMOS 3 線轉 8 線解碼器/多路分配器，帶有地址鎖存功能。它專為需要低功耗和高抗噪聲的存儲器解碼和數據路由應用而設計。該器件具有三個地址輸入 (A0, A1, A2)、三個鎖存使能輸入 (LE1, LE2, LE3) 和八個低電平有效輸出 (Y0–Y7)。當鎖存使能有效時，地址輸入被存儲；當任何鎖存使能無效時，輸出保持之前的狀態。CD74HC237PWR 的工作電壓範圍為 2V 至 6V，工作溫度範圍為 -55°C 至 +125°C。它採用 16 引腳 TSSOP 封裝，適合空間受限的設計。

詳細技術參數

核心特性

• 3 線轉 8 線解碼器/多路分配器，帶地址鎖存
• 高速 CMOS 技術，典型傳播延遲 15ns
• 寬工作電壓範圍：2V 至 6V
• 低功耗：最大 ICC 80µA
• 高抗噪聲：典型 VNH = 28% VCC
• 平衡傳播延遲：tPLH = tPHL
• 輸出可驅動多達 10 個 LSTTL 負載
• 輸入與 TTL 電壓兼容
• 採用 16 引腳 TSSOP 封裝，適合緊湊設計

典型應用場景

CD74HC237PWR 適用於多種應用，包括：

• 微控制器和 FPGA 中的存儲器解碼（例如 STM32F4、Xilinx Spartan-6）
• 通信系統中的數據路由（例如 5G 基站控制板）
• 汽車信息娛樂系統中的地址解碼（例如儀表盤顯示）
• 工業自動化 PLC（例如西門子 S7-1200）
• 消費電子產品如智能家居中樞（例如亞馬遜 Echo）

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