SN74HCT573N TI Latches | 20-PDIP | 8-Bit D-Type, 3-State Output

Product Overview

The SN74HCT573N is an octal transparent D-type latch with 3-state outputs from Texas Instruments. It operates with a 4.5V to 5.5V supply voltage and is designed for high-speed, low-power applications. The device features eight latches with non-inverting outputs, controlled by a latch enable (LE) and output enable (OE) input. When LE is high, the outputs follow the data inputs; when LE goes low, the data is latched. The OE input controls the 3-state outputs, allowing connection to bus-oriented systems. The SN74HCT573N is housed in a 20-pin PDIP package, making it suitable for through-hole PCB assembly.

Detailed Technical Specifications

Key Features

• 8-bit transparent D-type latch with 3-state outputs
• Inputs are TTL-voltage compatible
• 3-state outputs drive bus lines directly
• Low power consumption: 80 µA (max) ICC
• High noise immunity: VNIH = 2.0V, VNIL = 0.8V (min)
• Balanced propagation delays: tPLH = tPHL
• Outputs source/sink 6 mA
• Wide operating voltage range: 4.5V to 5.5V
• Standard 20-pin PDIP package

Target Applications

The SN74HCT573N is ideal for use in bus-oriented systems where data latching and 3-state output control are required. Specific applications include:

• 5G base station control boards for data buffering and address latching
• Automotive dashboard displays for segment driving and data storage
• Industrial PLC I/O modules for signal isolation and bus interfacing
• Medical equipment (e.g., patient monitors) for data acquisition and control
• Consumer electronics like smart home hubs for GPIO expansion

Global Supply Chain & Wholesale Solutions

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產品概述

SN74HCT573N 是德州儀器（TI）生產的八路透明 D 型鎖存器，具有三態輸出。該器件在 4.5V 至 5.5V 電源電壓下工作，專為高速、低功耗應用設計。它包含八個帶同相輸出的鎖存器，由鎖存使能（LE）和輸出使能（OE）輸入控制。當 LE 為高電平時，輸出跟隨數據輸入；當 LE 變為低電平時，數據被鎖存。OE 輸入控制三態輸出，便於連接總線系統。SN74HCT573N 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

• 八路透明 D 型鎖存器，帶三態輸出
• 輸入與 TTL 電壓兼容
• 三態輸出可直接驅動總線
• 低功耗：ICC 最大 80 µA
• 高抗噪能力：VNIH 最小 2.0V，VNIL 最小 0.8V
• 平衡傳播延遲：tPLH = tPHL
• 輸出可源/灌 6 mA 電流
• 寬工作電壓範圍：4.5V 至 5.5V
• 標準 20 引腳 PDIP 封裝

典型應用場景

SN74HCT573N 適用於需要數據鎖存和三態輸出控制的總線系統。具體應用包括：

• 5G 基站控制板中的數據緩衝和地址鎖存
• 汽車儀表盤顯示中的段驅動和數據存儲
• 工業 PLC I/O 模塊中的信號隔離和總線接口
• 醫療設備（如病人監護儀）中的數據採集和控制
• 消費電子產品（如智能家居中樞）中的 GPIO 擴展

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