LM339J TI Comparator | 14-CDIP | Quad, Open Collector, 2V to 36V

Product Overview

The LM339J is a quad differential comparator from Texas Instruments, designed for industrial and military-grade applications. Housed in a 14-pin ceramic dual-in-line package (CDIP), it offers four independent voltage comparators with open-collector outputs. The device operates from a single power supply over a wide voltage range of 2V to 36V, or from dual supplies of ±1V to ±18V. Its low supply current drain (0.8 mA typical) is independent of the supply voltage, making it ideal for battery-powered systems. The LM339J features a low input offset voltage (2 mV typical) and high input impedance, ensuring accurate comparisons in precision circuits.

Detailed Technical Specifications

Key Features

• Wide single supply voltage range: 2V to 36V
• Low supply current drain: 0.8 mA typical (independent of supply voltage)
• Low input offset voltage: 2 mV typical
• Low input bias current: 25 nA typical
• Open collector output for wired-AND capability
• High input impedance
• Differential input voltage range equal to supply voltage
• Output compatible with TTL, DTL, ECL, MOS, and CMOS logic
• Hermetic ceramic package for harsh environments

Target Applications

• 5G base station power supply monitoring and fault detection
• Automotive dashboard warning systems (e.g., battery undervoltage detection)
• Industrial motor control overcurrent protection
• Precision threshold detectors in medical equipment
• Zero-crossing detectors for AC power control
• Oscillator circuits and pulse generators

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for LM339J. 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

LM339J 是德州儀器（TI）推出的四通道差分比較器，採用 14 引腳陶瓷雙列直插封裝（CDIP），專為工業及軍用級應用設計。器件包含四個獨立的電壓比較器，具有開集電極輸出。它可在 2V 至 36V 的單電源或 ±1V 至 ±18V 的雙電源下工作。典型電源電流僅 0.8 mA，且與電源電壓無關，非常適合電池供電系統。LM339J 具有低輸入失調電壓（典型值 2 mV）和高輸入阻抗，確保精密電路中的準確比較。

詳細技術參數

核心特性

• 寬單電源電壓範圍：2V 至 36V
• 低電源電流：典型值 0.8 mA（與電源電壓無關）
• 低輸入失調電壓：典型值 2 mV
• 低輸入偏置電流：典型值 25 nA
• 開集電極輸出，支持線與功能
• 高輸入阻抗
• 差分輸入電壓範圍等於電源電壓
• 輸出兼容 TTL、DTL、ECL、MOS 和 CMOS 邏輯
• 密封陶瓷封裝，適用於惡劣環境

典型應用場景

• 5G 基站電源監控與故障檢測
• 汽車儀表盤報警系統（如電池欠壓檢測）
• 工業電機控制過流保護
• 醫療設備中的精密閾值檢測器
• 交流電源控制的過零檢測器
• 振盪器電路和脈衝發生器

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 LM339J 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。
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• 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。
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• 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
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