CD74HC373E TI Latches | 20-PDIP | 8-Bit D-Type, 3-State Output

Product Overview

The CD74HC373E from Texas Instruments is a high-speed CMOS octal transparent latch with 3-state outputs. It is designed for use in memory address latching, data storage, and bus driving applications. The device features eight D-type latches with a common latch enable (LE) and output enable (OE) control. When LE is high, the Q outputs follow the D inputs; when LE is low, the outputs are latched. The OE input controls the 3-state outputs, allowing connection to a common bus. The CD74HC373E is packaged in a 20-pin PDIP, making it suitable for through-hole PCB assembly.

Detailed Technical Specifications

Key Features

• 8-bit transparent latch with 3-state outputs
• Wide operating voltage range: 2V to 6V
• High noise immunity: typical VNIH = VNIL = 28% VCC
• Low power consumption: 80µA max ICC
• Balanced propagation delays: tPLH = tPHL
• Inputs accept voltages up to VCC
• Outputs can drive up to 10 LSTTL loads
• Standard 20-pin PDIP package

Target Applications

The CD74HC373E is ideal for use in a variety of digital systems, including:

• Memory address latching in microcontrollers and DSPs (e.g., TI TMS320F28335)
• Data storage and transfer in industrial PLCs (e.g., Siemens S7-1200)
• Bus interface in 5G base station control boards (e.g., Nokia AirScale)
• Display data latching in automotive dashboards (e.g., Tesla Model 3 instrument cluster)
• General-purpose I/O expansion in embedded systems (e.g., Raspberry Pi GPIO)

Global Supply Chain & Wholesale Solutions

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產品概述

CD74HC373E 是德州儀器 (TI) 生產的高速 CMOS 八路透明鎖存器，具有三態輸出。它適用於存儲器地址鎖存、數據存儲和總線驅動等應用。該器件包含八個 D 型鎖存器，帶有公共鎖存使能 (LE) 和輸出使能 (OE) 控制。當 LE 為高電平時，Q 輸出跟隨 D 輸入；當 LE 為低電平時，輸出被鎖存。OE 輸入控制三態輸出，允許連接到公共總線。CD74HC373E 採用 20 引腳 PDIP 封裝，適合通孔 PCB 組裝。

詳細技術參數

核心特性

• 8 位透明鎖存器，帶三態輸出
• 寬工作電壓範圍：2V 至 6V
• 高抗噪性：典型 VNIH = VNIL = 28% VCC
• 低功耗：最大 ICC 80µA
• 平衡傳播延遲：tPLH = tPHL
• 輸入可接受高達 VCC 的電壓
• 輸出可驅動多達 10 個 LSTTL 負載
• 標準 20 引腳 PDIP 封裝

典型應用場景

CD74HC373E 適用於多種數字系統，包括：

• 微控制器和 DSP 中的存儲器地址鎖存（例如 TI TMS320F28335）
• 工業 PLC 中的數據存儲和傳輸（例如西門子 S7-1200）
• 5G 基站控制板中的總線接口（例如諾基亞 AirScale）
• 汽車儀表盤中的顯示數據鎖存（例如特斯拉 Model 3 儀表組）
• 嵌入式系統中的通用 I/O 擴展（例如樹莓派 GPIO）

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