PI7C9X754FCE - 4 UART with 64-Byte FIFO | Diodes Incorporated
MPN： PI7C9X754FCE ✓ 啟用中PI7C9X754FCE 概覽
A UART, or universal asynchronous receiver-transmitter, is a communication controller that converts parallel data from a host processor into serial data and converts received serial data back into a parallel format. The PI7C9X754FCE belongs to the UART interface IC, interface controller, and clock-and-timing interface hierarchy, providing four channels in one package and reducing board area compared with four discrete UART devices.
Key features include a 16C550-compatible register set, independent control of each UART, transmit and receive FIFO level counters, and programmable transmit and receive FIFO trigger levels for interrupt or DMA-driven operation. The 64-byte FIFO buffers help absorb bursts of serial traffic while the host processor is busy, reducing the probability of receiver overrun and improving software flow-control flexibility.
The PI7C9X754FCE can be configured for RS485 Controller and IrDA 1.1 use according to distributor product information. The Intel/Motorola bus selection allows compatibility with different processor interfaces, while the programmable FIFO trigger levels support interrupt-driven or DMA-based data movement. These features make the device suitable for multi-channel embedded systems where four UART resources must share limited host I/O.
Typical applications include industrial serial hubs, POS terminals, test equipment, printers, modems, multiport communications modules, and embedded control systems. The low 1.62 V to 3.6 V operating range is appropriate for modern 3.3 V digital systems, while 5 V tolerant serial inputs simplify interfaces to legacy equipment. Care is still required when connecting external signals because tolerance applies to the specified serial inputs, not necessarily every control pin.
For robust PCB implementation, place the device close to the protected connector or transceiver pins, route serial traces away from clocks and switching-power nodes, and validate input levels, termination, grounding, and system-level RS485 or IrDA requirements. This page combines verified manufacturer and distributor information, pricing references, replacement analysis, and practical design guidance beyond a raw datasheet parameter list.
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PI7C9X754FCE
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PI7C9X754FCE-ND
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PI7C9X754FCE-N
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PI7C9X754FCE-X
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PI7C9X754FCE 最大額定值與電氣特性
| Device Type | Quad UART interface controller |
| Number of UART Channels | 4 |
| 工作電源電壓 | 1.62 V to 3.6 V |
| Serial Input Tolerance | 5 V tolerant |
| Transmit FIFO Per Channel | 64 byte |
| Receive FIFO Per Channel | 64 byte |
| Register Compatibility | 16C550 compatible |
| Processor Bus Selection | Intel or Motorola selectable |
| FIFO Trigger Control | Programmable transmit and receive levels |
| Data Transfer Support | DMA and interrupt operation |
| Sleep Mode | Programmable with automatic wake-up |
| Communication Applications | RS485 Controller and IrDA 1.1 |
| 封裝 | 64-LQFP (10 x 10 mm) |
| 安裝類型 | Surface mount |
| RoHS 狀態 | Compliant |
| Product Classification | UART interface IC |
| Manufacturer | Diodes Incorporated |
PI7C9X754FCE 64-lqfp (10 x 10 mm) 腳位配置指南
PI7C9X754FCE（64-lqfp (10 x 10 mm) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： PI7C9X754FCE.
請參閱 資料表 以查看完整腳位配置。
典型應用
PI7C9X754FCE 適用於 6 應用s: Industrial Multiport Serial Controller, RS485 Communication Hub, IrDA 1.1 Data Link, Point-of-Sale Terminal, Embedded Test and Measurement Equipment, Data Acquisition and Control Module.
Industrial Multiport Serial Controller
The PI7C9X754FCE fits industrial control equipment that must support several serial devices through one host processor. Its four independently controlled UART channels, each with a 64-byte transmit and receive FIFO, allow bursts of command, status, and diagnostic traffic to be buffered before software services the ports. The 1.62 V to 3.6 V operating range suits modern 3.3 V control platforms, while programmable FIFO trigger levels support interrupt-driven operation. For an RS485 implementation, the IC can serve as the host-side UART, with an external transceiver, isolation, surge protection, and termination required.
推薦
RS485 Communication Hub
The PI7C9X754FCE is appropriate for the host side of a multi-channel RS485 hub because it consolidates four UART channels, 16C550-compatible registers, and separate 64-byte FIFOs into one controller. Software can select interrupt or DMA servicing and observe FIFO level counters to manage each link independently. The controller does not itself provide RS485 line drivers, so each differential port still needs a suitable transceiver such as an SP485-class device, along with termination and protection appropriate to the cable environment.
推薦
IrDA 1.1 Data Link
The PI7C9X754FCE can support an IrDA 1.1-oriented host interface through its selectable Intel or Motorola data-bus interface and four independent UART channels. The 64-byte transmit and receive FIFOs help separate higher-speed host processing from the character-oriented serial exchange required by infrared links. A production design must add the appropriate infrared transceiver, optical interface components, timing budget, and signal-conditioning network because the PI7C9X754FCE itself is the UART controller rather than the infrared transducer.
推薦
Point-of-Sale Terminal
A point-of-sale terminal can use the PI7C9X754FCE to consolidate printer, card-reader, display, and peripheral serial connections into four buffered UART channels. Its 64-byte FIFOs reduce the chance that short command bursts are lost while the main processor handles transactions or user-interface work. The selectable Intel or Motorola bus mode helps align the controller with the host interface, while 5 V tolerant serial inputs can simplify connection to compatible legacy peripherals. Electrical standards, connector protection, and firmware handshakes still need verification for every peripheral.
推薦
Embedded Test and Measurement Equipment
The PI7C9X754FCE is useful in test and measurement products that must connect several instruments, control ports, or service interfaces to one embedded controller. Four independent channels reduce the need for separate UART devices, while per-channel FIFO counters and trigger-level programming help separate data acquisition from interrupt handling. The 1.62 V to 3.6 V supply range supports compact logic systems, and 5 V tolerant serial inputs may simplify legacy instrument connections. Triggering, baud-rate accuracy, electrical protection, and isolation must be validated for the actual test environment.
推薦
Data Acquisition and Control Module
The PI7C9X754FCE can serve as the serial interface hub in a data-acquisition module that connects four external sensors, actuators, or instrument-control channels. Each 64-byte receive FIFO provides useful buffering for periodic or bursty telemetry, while independent FIFO trigger levels let software tune interrupt latency and processor load. The controller operates down to 1.62 V and supports 5 V tolerant serial inputs, making it practical for mixed-voltage industrial boards. Designers should still isolate analog-adjacent circuitry, provide connector surge protection, and verify channel timing against the acquisition rate.
推薦
推薦產品摘要
工程參考資料，適用於 PI7C9X754FCE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PI7C9X754FCE | PI7C9X754FCE-T | PI7C9X754FCE-ND | PI7C9X754FCE-N | PI7C9X754FCE-X |
|---|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Package | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) |
| Device Type | Quad UART interface controller | Quad UART interface controller | Quad UART interface controller | Quad UART interface controller | Quad UART interface controller | Quad UART interface controller |
| UART Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Operating Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| FIFO Capacity | 64 byte transmit and 64 byte receive per UART | 64 byte transmit and 64 byte receive per UART | 64 byte transmit and 64 byte receive per UART | 64 byte transmit and 64 byte receive per UART | 64 byte transmit and 64 byte receive per UART | 64 byte transmit and 64 byte receive per UART |
| Register Set | 16C550 compatible | 16C550 compatible | 16C550 compatible | 16C550 compatible | 16C550 compatible | 16C550 compatible |
| Serial Input Tolerance | 5 V tolerant | 5 V tolerant | 5 V tolerant | 5 V tolerant | 5 V tolerant | 5 V tolerant |
| Communication Use | RS485 Controller and IrDA 1.1 | RS485 Controller and IrDA 1.1 | RS485 Controller and IrDA 1.1 | RS485 Controller and IrDA 1.1 | RS485 Controller and IrDA 1.1 | RS485 Controller and IrDA 1.1 |
主要差異化特點
- Four serial channels in one controller (對比Discrete single-channel UART implementation)
- Per-channel transmit and receive buffering (對比Basic UART without FIFO buffering)
- Flexible host and data-transfer architecture (對比Fixed-bus UART controller)
- Low-voltage operation with legacy serial-input compatibility (對比5 V-only UART interface)
設計說明
Confirm the complete 64-pin assignment from the manufacturer datasheet before routing because the supplied search results identify the 64-LQFP 10 x 10 mm package but do not provide an authoritative pin table. Keep UART traces short, provide a continuous ground reference, and place any external RS485 or IrDA transceiver close to the corresponding connector or optical device. The PI7C9X754FCE is the host-side controller, so do not route differential RS485 or optical IrDA signals directly to its serial pins.
Operate the PI7C9X754FCE only within its verified 1.62 V to 3.6 V supply range. The 5 V tolerant serial-input feature does not authorize 5 V on power, clock, control, or processor-bus pins. Provide stable, low-noise supply decoupling close to the device, validate signal levels at every connected peripheral, and use series resistors or level translation where a legacy peripheral may exceed the interface's absolute maximum conditions.
Do not assume that four UART channels eliminate the need for correct interrupt, DMA, and FIFO-trigger configuration. Program the Intel or Motorola bus selection to match the host processor, initialize each independently controlled channel, and select transmit and receive FIFO trigger levels that match the service latency of the firmware. For RS485, also implement direction control, bus turnaround timing, termination, and fault handling around the external transceiver.
Separate the four UART routes from clocks, switching regulators, and high-current return paths to reduce noise and timing margin risk. If channels connect to external equipment through long cables, place protection close to the connector rather than near the controller. Use a common-quality ground strategy, control edge rates through source termination where necessary, and validate eye opening, ringing, and crosstalk with oscilloscope measurements on the assembled board.
合規資訊
RoHS compliance is stated in the verified JLCPCB product information. The supplied data does not establish REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
