{"product_id":"ch351q-pci-bus-dual-serial-parallel-port-ic-chip-lqfp-64-5pcs","title":"CH351Q PCI Bus Dual Serial \u0026 Print Port IC Chip LQFP-64 5-Pack","description":"\u003ch2\u003eCH351Q PCI Bus Dual Serial \u0026amp; Parallel Port Integrated Circuit — 5-Piece Pack\u003c\/h2\u003e\n\u003cp\u003eGet reliable multi-port expansion with the \u003cstrong\u003eCH351Q integrated circuit chip\u003c\/strong\u003e — a high-performance PCI Bus controller supporting dual serial ports or a parallel print port in a compact \u003cstrong\u003eLQFP-64 package\u003c\/strong\u003e. This 5-piece pack is ideal for electronics engineers, hardware developers, and hobbyists who need dependable PCI interface chips for prototyping, repairs, or production builds.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCI Bus Interface:\u003c\/strong\u003e Full compliance with PCI local bus specification for seamless integration into PCI-based systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Serial Port or Parallel Print Port:\u003c\/strong\u003e Flexible configuration — use as dual UART serial port controller or a standard parallel printer port (SPP\/EPP\/ECP compatible).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLQFP-64 Package:\u003c\/strong\u003e Low-profile 64-pin quad flat package for surface-mount designs, offering a compact PCB footprint.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand New Condition:\u003c\/strong\u003e Each chip is new and untested from stock — ready for integration into your designs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Concerned Chemicals:\u003c\/strong\u003e None — compliant with standard environmental requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValue Pack:\u003c\/strong\u003e Comes as a \u003cstrong\u003eset of 5 chips\u003c\/strong\u003e, perfect for multi-unit projects or keeping spares on hand.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e CH351Q (351Q)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e PCI Bus\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Dual Serial Port or Parallel Print Port Controller\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e LQFP-64\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 5 PCS per pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NioCen\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThe CH351Q is a go-to choice for PCB designers building PCI expansion cards, engineers maintaining legacy industrial systems, or electronics students developing PCI interface projects. With a 5-pack quantity, you'll have enough chips for multiple builds and prototypes without placing repeated small orders.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the CH351Q chip used for?\u003c\/h4\u003e\n\u003cp\u003eA: The CH351Q is a PCI Bus interface IC that enables dual serial port (UART) or parallel print port (SPP\/EPP\/ECP) functionality. It is commonly used in PCI expansion cards, industrial control boards, and legacy system upgrades requiring additional serial or parallel communication ports.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does LQFP-64 mean for the CH351Q package?\u003c\/h4\u003e\n\u003cp\u003eA: LQFP-64 stands for Low-profile Quad Flat Package with 64 pins. This is a surface-mount package type, meaning the chip is designed to be soldered directly onto a PCB. The LQFP-64 footprint is widely supported by PCB design software and standard SMD soldering equipment.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many chips are included in this listing?\u003c\/h4\u003e\n\u003cp\u003eA: This listing includes a pack of \u003cstrong\u003e5 CH351Q chips\u003c\/strong\u003e, making it cost-effective for projects that require multiple units or for engineers who want to keep backup components available.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the CH351Q compatible with standard PCI slot motherboards?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The CH351Q is designed to comply with the PCI local bus specification, making it compatible with standard PCI-based motherboard designs for use in expansion cards and interface circuits.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the CH351Q chip used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The CH351Q is a PCI Bus interface IC that enables dual serial port (UART) or parallel print port (SPP\/EPP\/ECP) functionality. It is commonly used in PCI expansion cards, industrial control boards, and legacy system upgrades requiring additional serial or parallel communication ports.\"}}, {\"@type\": \"Question\", \"name\": \"What does LQFP-64 mean for the CH351Q package?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"LQFP-64 stands for Low-profile Quad Flat Package with 64 pins. 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