PI7C9X794FCEX - Quad UART Interface IC | Diodes Incorporated
MPN: PI7C9X794FCEX ✓ نشطPI7C9X794FCEX نظرة عامة
A UART, or universal asynchronous receiver/transmitter, is an interface controller that converts parallel data from a processor into serial data and converts incoming serial data into parallel data for host processing. UART interface ICs sit within the broader category of interface ICs and provide protocol timing, buffering, framing, and status handling for serial links. The PI7C9X794FCEX combines four such channels with a compact surface-mount package.
The principal feature of the PI7C9X794FCEX is its four-channel UART architecture. Each channel benefits from dedicated transmit and receive buffering, while the documented 64-byte FIFO supports burst-oriented host traffic and helps separate the processor from individual byte transfers. Its 1.62 V to 3.6 V operating range covers common low-voltage embedded and communications systems while allowing operation from both 1.8 V and 3.3 V supply environments.
The RS485 controller and IrDA 1.1 designation broadens the device beyond a basic UART. An RS485-capable channel can support differential industrial serial links when used with suitable external transceiver circuitry, while IrDA-compatible operation addresses short-range infrared data-transfer systems. These functions place the IC between a host processor and physical-layer interface circuits, with the exact line-driver requirements determined by the selected external components.
Typical uses include industrial control boards, multiport serial concentrators, embedded test equipment, data-acquisition systems, and communication peripherals requiring several independent UART channels. The four-channel organization can reduce the number of discrete interface devices and simplify firmware multiplexing. Designers should still allocate pins for interrupt, modem-control, and interface-specific signals according to the manufacturer pin-description table.
Thermal and layout planning are important in dense designs. Place the device away from heat sources, provide a continuous ground plane, and route high-speed or externally exposed communication signals with appropriate return paths. Decoupling capacitors should be positioned close to the corresponding supply and ground pins according to the manufacturer layout recommendations.
This product page consolidates the confirmed electrical, interface, package, and ordering characteristics into an engineering-focused reference. It also distinguishes verified pin-compatible substitutions from broader functional alternatives, helping designers assess replacement risk without assuming that every similarly described UART interface shares the same footprint.
بدائل مباشرة لـ PI7C9X794FCEX — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
لا تتوفر بدائل متوافقة تمامًا لهذا المنتج.
اطلب بدائلPI7C9X794FCEX الحدود القصوى والخصائص الكهربائية
| Product Type | Quad UART interface IC |
| Supply Voltage Range | 1.62 V to 3.6 V |
| UART Channel Count | 4 channels |
| FIFO Capacity | 64 byte |
| RS485 Controller Support | Supported |
| IrDA Support | IrDA 1.1 |
| Interface Classification | UART interface |
| Package Type | 64-pin LQFP |
| Package Dimensions | 10 mm x 10 mm |
| نوع التركيب | Surface mount |
| Shipping Format | Tape and reel |
دليل تكوين أطراف PI7C9X794FCEX 10 mm x 10 mm
تكوين الأطراف لـ PI7C9X794FCEX (حزمة 10 mm x 10 mm). يتميز جهاز الطاقة هذا بأطراف البوابة والمصرف والمصدر. بالنسبة للحزم غير المستقطبة، راجع ورقة بيانات الشركة المصنعة لمعرفة الاتجاه الدقيق للطرف 1 وتفاصيل البصمة. تشمل التطبيقات الشائعة تصميم مصادر الطاقة وتشغيل المحركات وتبديل الأحمال.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ PI7C9X794FCEX.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
PI7C9X794FCEX مناسب لـ 6 التطبيقs: Multiport Industrial Control, Embedded Serial Concentrator, Data Acquisition Equipment, RS485 Communications Gateway, IrDA Short-Range Data Link, Communications Test Fixture.
Multiport Industrial Control
The PI7C9X794FCEX fits industrial control boards that must connect several embedded modules through independent UART channels while operating from a 1.62 V to 3.6 V supply. Its four-channel quad UART organization and 64-byte FIFO reduce the number of separate serial controllers, while RS485 controller support can simplify links using suitable external transceivers. Designers should verify the exact channel pin assignments, interrupt behavior, and electrical limits in the manufacturer datasheet before assigning RS485 bus nodes.
موصى به
Embedded Serial Concentrator
A four-channel UART controller is useful in embedded serial concentrators that aggregate data from sensors, actuators, and service ports. The PI7C9X794FCEX provides a 64-byte FIFO and accepts a 1.62 V to 3.6 V operating range, allowing the design to share interfaces across low-voltage system rails. Firmware can service each channel independently, but the designer must confirm per-channel interrupt, parity, flow-control, and modem-control behavior from the manufacturer timing and pin tables.
موصى به
Data Acquisition Equipment
The PI7C9X794FCEX can manage multiple serial data sources in laboratory, test, and data-acquisition equipment where a host must collect information from several instruments. Four UART channels reduce package count compared with four discrete controllers, and the documented 64-byte FIFO supports burst reception between host servicing intervals. Use the manufacturer timing diagrams to set baud-rate tolerance and buffer handling, and add appropriate line-interface protection when instruments connect to long cables.
موصى به
RS485 Communications Gateway
For an RS485 gateway, the PI7C9X794FCEX provides four UART channels plus RS485 controller capability within a 3.3 V-class interface IC. A host processor can use the channels to manage local service ports and remote bus links while external transceivers handle line-level signaling. Verify whether each channel supports the required RS485 mode, check the 64-byte FIFO behavior, and provide termination and protection according to the physical bus rather than relying only on the IC specifications.
موصى به
IrDA Short-Range Data Link
IrDA 1.1 support makes the PI7C9X794FCEX relevant to short-range infrared communication links used in local control, point-of-service, or removable-device interfaces. The quad UART architecture allows an IrDA function to coexist with other serial channels on the same host processor. The design still requires suitable infrared emitter and detector components, correct optical or electrical interface circuitry, and verification of the exact IrDA timing requirements in the Diodes Incorporated datasheet.
موصى به
Communications Test Fixture
A communications test fixture can use the PI7C9X794FCEX to present several serial ports to a processor without requiring four separate UART packages. The 64-pin LQFP package is larger than a single-channel device, but the four channels and 64-byte FIFO consolidate repetitive interface logic. Keep sensitive analog and high-speed routing away from external serial lines, use grounded return paths, and confirm whether the test fixture requires RS-485, RS-232, IrDA, or a combination of these physical interfaces.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PI7C9X794FCEX — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج |
|---|---|
| Brand | Diodes Incorporated |
| Package | 64-pin LQFP, 10 mm x 10 mm |
| Product Type | Quad UART interface IC |
| Supply Voltage Range | 1.62 V to 3.6 V |
| UART Channel Count | 4 channels |
| FIFO Capacity | 64 byte |
| RS485 Controller Support | Supported |
| IrDA Support | IrDA 1.1 |
| Shipping Format | Tape and reel |
أبرز الفروقات
- Four serial channels in one interface IC (مقابلSingle-channel UART implementations)
- Integrated RS485 controller capability (مقابلBasic UART-only implementations)
- IrDA 1.1 and multi-channel operation in one package (مقابلSingle-function IrDA transceivers)
ملاحظات التصميم
Assign the complete 64-pin footprint from the current manufacturer datasheet and reserve the associated power, ground, interrupt, and UART signal pins before schematic capture. Keep the 10 mm by 10 mm LQFP on a continuous ground plane, avoid placing sensitive analog circuitry directly beneath long external serial routes, and place external line-driver or receiver circuits near their connector-facing protection network.
Plan the 1.62 V to 3.6 V rails so the controller, external transceivers, pull resistors, and connector-side circuits share compatible logic levels. Use the manufacturer power-pin and decoupling guidance when placing bulk and high-frequency capacitors. Estimated: the IC's own dissipation cannot be calculated without the selected operating mode, rail voltage, channel activity, and manufacturer power tables.
Route each UART connection with a continuous ground reference and avoid long unprotected traces between the controller and external transceivers. For RS485 or IrDA interfaces, keep connector-side protection and line-driver circuitry near the connector. If unused channels are disabled rather than connected, follow the datasheet guidance for their input states to prevent floating pins or unintended activity.
Do not treat a similar quad-UART description as proof of replaceability. Verify pin names, channel assignments, interrupt polarity, FIFO behavior, supply levels, RS485 control logic, and IrDA timing against the manufacturer documentation. A functional UART interface with a different 64-pin assignment may require PCB changes even when its headline channel count and package look similar.
معلومات الامتثال
The manufacturer product listing confirms the PI7C9X794FCEX identity, electrical range, interface features, and package, but it does not state the individual compliance statuses required for this record.
