LM339AD ST Comparator | 14-SO | Low Power, Quad Differential

Product Overview

The LM339AD is a quad differential comparator manufactured by STMicroelectronics, designed for low-power voltage comparison applications. It features four independent comparators in a single 14-SO package, each capable of operating from a single power supply over a wide voltage range. The device is optimized for low supply current, making it ideal for battery-powered and portable equipment. With open-collector outputs, the LM339AD can interface with various logic families and drive loads up to 20 mA. Its high input impedance and low input offset voltage ensure accurate comparisons in precision circuits.

Detailed Technical Specifications

Key Features

• Quad comparator in compact 14-SO package
• Wide single/dual supply voltage range
• Low supply current: 0.4 mA per comparator
• Low input offset voltage: 2 mV typical
• Open-collector outputs for wired-AND connection
• High input impedance
• Compatible with TTL, DTL, ECL, MOS, and CMOS logic
• ESD protection: 2 kV HBM

Target Applications

• 5G base station power supply monitoring
• Automotive dashboard warning systems (e.g., battery undervoltage detection)
• Industrial sensor threshold detection (e.g., temperature, pressure)
• Battery management systems for portable devices
• Zero-crossing detectors in AC power control
• Oscillator and pulse generator circuits

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for LM339AD. Our core advantages include:

• 24/7 Global Customer Support: Professional team providing instant quotes and technical support worldwide.
• In-stock Inventory, Same-day Shipping: We maintain localized stock; orders confirmed before 4 PM are shipped the same day.
• HK-SZ Synergy, Flexible Settlement: Direct global shipping from Shenzhen with support for HK bank transfers and multi-currency.
• Escrow Secured Transactions: We support Escrow.com for secure transactions, ensuring peace of mind for batch orders.
• BOM Kitting & Sampling Services: Specialized sourcing for testing samples and urgent shortage components.

Quality Assurance & Compliance

Jasin Chip guarantees that all delivered products are 100% original factory stock with full quality assurance and traceability.

• 100% Original & Authentic: All components are guaranteed to be authentic with strict quality control.
• RoHS Compliant: All electronic components comply with international environmental and safety standards.
• Original Factory Packaging: We maintain original factory packaging and seals to ensure ESD protection and physical integrity.

產品概述

LM339AD 是意法半導體（STMicroelectronics）生產的四路差分比較器，專為低功耗電壓比較應用設計。該器件在單個 14-SO 封裝內集成了四個獨立的比較器，每個比較器可在寬電壓範圍內由單電源供電工作。其低電源電流特性使其非常適合電池供電和便攜式設備。開集電極輸出可與多種邏輯系列接口，並驅動高達 20 mA 的負載。高輸入阻抗和低輸入失調電壓確保了精密電路中的準確比較。

詳細技術參數

核心特性

• 緊湊 14-SO 封裝內集成四路比較器
• 寬單/雙電源電壓範圍
• 低電源電流：每比較器 0.4 mA
• 低輸入失調電壓：典型 2 mV
• 開集電極輸出，支持線與連接
• 高輸入阻抗
• 兼容 TTL、DTL、ECL、MOS 和 CMOS 邏輯
• ESD 保護：2 kV HBM

典型應用場景

• 5G 基站電源監控
• 汽車儀表盤警告系統（如電池欠壓檢測）
• 工業傳感器閾值檢測（如溫度、壓力）
• 便攜設備電池管理系統
• 交流電源控制中的過零檢測器
• 振盪器和脈衝發生器電路

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 LM339AD 提供全面的供應鏈與批發解決方案。 我們的核心優勢包括：

• 全天候環球客戶支援：專業團隊為您提供即時報價及技術支援，無需漫長等待。
• 現貨庫存，即日發貨：確保現貨充足。下午 4 點前確認訂單，即可安排當天寄出。
• 深港聯動，結算靈活：深圳直發全球，物流高效可靠；支援香港銀行戶口轉賬及多幣種結算。
• Escrow 擔保交易：支援 Escrow.com 平台交易，保障買賣雙方權益，小批量訂單亦可安心在線下單。
• BOM 配單與樣板服務：提供樣板測試及認證支援。專注一站式 BOM 配套及緊急缺料採購服務。

品質保證與合規

Jasin Chip 承諾所有出貨產品均為原廠正貨，具備完善的品質保證及產品可追溯性。

• 100% 原廠正貨：承諾所有供應零件均為原裝現貨，品質嚴格把關，來源清晰可追溯。
• 符合 RoHS 認證：所有電子元器件均符合國際環保標準及相關安全認證。
• 原廠封裝保護：嚴格保留原廠原始包裝及封條，確保物流過程中的靜電防護 (ESD) 與物理安全。

以上產品均為原廠正貨，提供 BOM 配單及現貨庫存支援，歡迎查詢。

HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
Trusted Partner for Automotive, Industrial, and Hard-to-find Components.
WhatsApp: +852 5209 9691 | Email: [email protected]