CD54HCT688F TI Comparators | 20-CDIP | 8-Bit Identity, High-Speed

Product Overview

The CD54HCT688F from Texas Instruments is a high-speed 8-bit identity comparator designed for digital systems requiring fast and accurate comparison of two 8-bit words. Fabricated with advanced HCMOS technology, it offers the high noise immunity and low power consumption of CMOS while providing speeds comparable to LSTTL. The device compares two 8-bit inputs (P and Q) and provides a low-impedance output (P=Q) when all bits match. It is ideal for address decoding, data validation, and control logic in high-reliability applications.

Detailed Technical Specifications

Key Features

• 8-bit identity comparator with active-low output (P=Q)
• High speed: typical propagation delay of 23 ns at 5V
• Low power consumption: 80 µA max ICC
• Wide operating voltage range: 4.5V to 5.5V
• High noise immunity: typical VNH = 1.0V, VNL = 1.0V
• Balanced propagation delays: tPLH and tPHL
• Inputs and outputs are fully TTL-compatible
• Ceramic package for high reliability and extended temperature range
• Complies with JEDEC standard No. 7A

Target Applications

• Address decoding in 5G base station control boards
• Data validation in automotive dashboard systems
• Memory address comparison in industrial PLCs
• Identity checking in server backplane management
• Control logic in aerospace avionics

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for CD54HCT688F. 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

CD54HCT688F 是德州儀器 (TI) 生產的高速 8 位元身份比較器，專為需要快速準確比較兩個 8 位元字元的數位系統而設計。採用先進的 HCMOS 技術，具有 CMOS 的高抗雜訊能力和低功耗，同時提供與 LSTTL 相當的速度。該器件比較兩個 8 位元輸入（P 和 Q），並在所有位元匹配時提供低阻抗輸出（P=Q）。非常適合高可靠性應用中的位址解碼、資料驗證和控制邏輯。

詳細技術參數

核心特性

• 8 位元身份比較器，低電平有效輸出 (P=Q)
• 高速：5V 時典型傳播延遲為 23 ns
• 低功耗：最大 ICC 為 80 µA
• 寬工作電壓範圍：4.5V 至 5.5V
• 高抗雜訊能力：典型 VNH = 1.0V, VNL = 1.0V
• 平衡的傳播延遲：tPLH 和 tPHL
• 輸入和輸出完全與 TTL 相容
• 陶瓷封裝，高可靠性，寬溫度範圍
• 符合 JEDEC 標準 No. 7A

典型應用場景

• 5G 基站控制板中的位址解碼
• 汽車儀表板系統中的資料驗證
• 工業 PLC 中的記憶體位址比較
• 伺服器背板管理中的身份檢查
• 航空航太電子中的控制邏輯

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 CD54HCT688F 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.
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