SN74LS191DR TI Synchronous Up/Down Counter | 16-SOIC | 4-Bit, Binary

Product Overview

The SN74LS191DR is a synchronous, 4-bit up/down binary counter from Texas Instruments (TI), designed for high-performance digital systems. It features a 16-SOIC package, making it suitable for compact PCB layouts. The device operates with a typical supply voltage of 5V and offers synchronous counting with parallel load capability. Its asynchronous master reset (MR) input clears the counter to zero, while the count enable (CTEN) and up/down (U/D) inputs control counting direction. The ripple-carry output (RCO) facilitates cascading multiple counters for extended bit-width applications.

Detailed Technical Specifications

Key Features

• Synchronous 4-bit binary up/down counting
• Parallel load for presetting count value
• Asynchronous master reset (MR) to clear counter
• Ripple-carry output (RCO) for cascading
• Low power consumption (typical 35 mW)
• Wide operating voltage range (4.75V to 5.25V)
• High noise immunity (typical 400 mV)
• Industry-standard 16-SOIC package

Target Applications

The SN74LS191DR is ideal for digital counting and timing applications. Specific examples include:

• 5G base station control logic for channel counting
• Automotive dashboard odometer and trip meter circuits
• Industrial programmable logic controllers (PLCs) for event counting
• Frequency dividers in communication systems
• Digital clocks and timers in consumer electronics

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for SN74LS191DR. 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

SN74LS191DR 是德州儀器（TI）生產的同步4位二進制加/減計數器，採用16-SOIC封裝，適用於緊湊型PCB設計。器件典型工作電壓為5V，支持同步計數並具有並行加載功能。異步主復位（MR）輸入可將計數器清零，而計數使能（CTEN）和加/減（U/D）輸入控制計數方向。紋波進位輸出（RCO）便於級聯多個計數器以擴展位寬。

詳細技術參數

核心特性

• 同步4位二進制加/減計數
• 並行加載預設計數值
• 異步主復位（MR）清零計數器
• 紋波進位輸出（RCO）用於級聯
• 低功耗（典型35 mW）
• 寬工作電壓範圍（4.75V 至 5.25V）
• 高抗噪能力（典型400 mV）
• 業界標準16-SOIC封裝

典型應用場景

SN74LS191DR 適用於數字計數和定時應用。具體實例包括：

• 5G基站控制邏輯中的通道計數
• 汽車儀表盤里程表和行程表電路
• 工業可編程邏輯控制器（PLC）中的事件計數
• 通信系統中的分頻器
• 消費電子中的數字時鐘和定時器

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 SN74LS191DR 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]