PI7C9X754ZBEX - 4-Channel UART Controller | Diodes Incorporated
MPN： PI7C9X754ZBEX ✓ 啟用中PI7C9X754ZBEX 概覽
A UART, or universal asynchronous receiver/transmitter, is a serial interface controller that converts parallel data from a processor into framed serial data and converts received serial data into parallel data. The PI7C9X754ZBEX sits within the broader interface-controller hierarchy, where serial controllers connect host processors to communications peripherals through standardized asynchronous or infrared signaling methods.
The four-channel architecture allows one host interface to manage four independent serial channels. Each channel includes a 64-byte FIFO, reducing the need for frequent processor intervention during short data bursts. Supported logic levels include 1.8 V, 2.5 V, and 3.3 V, permitting integration with both low-voltage embedded processors and conventional 3.3 V digital systems.
The controller combines two communication capabilities in one device: an RS485 controller interface and IrDA 1.1 operation. RS485 is suited to robust, multidrop wired links, while IrDA provides an infrared-oriented serial option for short-range point-to-point equipment. The manufacturer classifies the component as a serial I/O and communications controller with industrial temperature grading.
Typical uses include embedded serial concentrators, industrial control equipment, data-collection terminals, printer interfaces, and infrared communication modules. In a multi-channel design, the controller can connect several external transceivers while buffering data in its independent FIFOs, although the final link architecture still depends on the external transceiver and its signal requirements.
Layout should preserve the exposed-pad thermal and electrical requirements of the TQFN package, place bypass capacitors close to the supply pins, and route serial outputs away from sensitive clock and analog circuits. Confirm the exact pin functions, termination requirements, bypass capacitance, and exposed-pad connection in the manufacturer datasheet before fabrication.
This product record combines the published channel, FIFO, voltage, protocol, package, and environmental identifiers with practical integration guidance, comparison structure, and sourcing information. It is intended to help engineers identify the correct controller and plan a PCB implementation without substituting package or protocol assumptions.
直接替換替代品，適用於 PI7C9X754ZBEX — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品PI7C9X754ZBEX 最大額定值與電氣特性
| Number of UART Channels | 4 channels |
| FIFO Depth | 64 bytes per channel |
| RS485 Controller Support | Supported |
| IrDA Version | IrDA 1.1 |
| Supported Supply Voltage | 1.8 V, 2.5 V, or 3.3 V |
| Device Type | Serial I/O and communications controller |
| 封裝 | 48-terminal TQFN, 7 mm x 7 mm, exposed pad |
| Terminal Count | 48 terminals |
| Package Code | HVQCCN |
| 安裝方式 | No-lead surface mount |
| Package Shape | Square |
| Temperature Grade | Industrial |
| Shipping Package | Tape and reel |
PI7C9X754ZBEX tape and reel 腳位配置指南
PI7C9X754ZBEX（tape and reel 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： PI7C9X754ZBEX.
請參閱 資料表 以查看完整腳位配置。
典型應用
PI7C9X754ZBEX 適用於 6 應用s: Multi-Port Serial Concentrator, Industrial Control Terminal, Infrared Communication Module, Data Collection and Logging Equipment, Embedded Printer and Peripheral Interface, RS485 Remote Sensor Network.
Multi-Port Serial Concentrator
The PI7C9X754ZBEX fits a multi-port serial concentrrator that lets one embedded host manage four independent UART links. Each channel has a 64-byte FIFO, which helps absorb short bursts and reduces the frequency of host servicing. Use the controller with suitable external transceivers for the selected physical medium. The 1.8 V, 2.5 V, and 3.3 V operating options allow the device to sit alongside processors with different interface levels. During layout, separate the serial routes, provide local supply bypassing, and follow the exposed-pad land pattern to preserve signal integrity and thermal performance.
推薦
Industrial Control Terminal
The PI7C9X754ZBEX is suitable for an industrial control terminal that must coordinate several local or remote serial devices. Its four UART channels provide separate data paths, while the 64-byte FIFOs help isolate the host from short traffic bursts on individual links. The industrial temperature grade supports industrial equipment when operation remains inside the manufacturer-defined limits. For RS485-connected sensors or controllers, add the appropriate bus transceiver, termination strategy, surge protection, and grounding arrangement. Firmware must also define channel routing, baud-rate handling, flow control, and error recovery because these functions are governed by the complete system architecture.
推薦
Infrared Communication Module
The PI7C9X754ZBEX can serve as the UART controller in an IrDA 1.1 communication module. The four-channel arrangement is useful when one embedded processor must manage more than one infrared link or a mixture of infrared and wired serial connections. Each 64-byte FIFO provides dedicated buffering for its channel, helping the host process short transactions without continuous polling. An infrared transceiver and its optical or electrical drive circuitry remain necessary to implement the physical link. Confirm the required baud rate, signal timing, optical interface, and any direct-viewing restrictions in the manufacturer datasheet before finalizing the module architecture.
推薦
Data Collection and Logging Equipment
The PI7C9X754ZBEX fits logging equipment that aggregates data from several instruments or remote nodes. Four independently buffered UART channels can support simultaneous collection tasks, and the 64-byte FIFOs help prevent temporary traffic bursts from monopolizing the host processor. The controller's 1.8 V, 2.5 V, and 3.3 V operating options provide flexibility around embedded processors and sensor interfaces. Use RS485 where longer wired runs or noise immunity are priorities, and use appropriate transceivers to isolate the controller from the physical bus. Firmware should add per-channel timeouts, checksums, sequence tracking, and a controlled recovery path for stalled or corrupted traffic.
推薦
Embedded Printer and Peripheral Interface
The PI7C9X754ZBEX is appropriate for an embedded system that connects a printer, reader, or other serial peripheral alongside additional communications ports. The four-channel architecture avoids consuming a separate controller for every asynchronous link, while the per-channel 64-byte FIFOs improve burst-handling capability. The host processor can initialize separate baud rates and traffic streams if supported by the final device configuration. Electrical interface selection remains important: a UART controller does not directly provide the physical levels for RS-232, RS-485, or IrDA links, so the board must include the corresponding transceiver or optical interface circuitry and protection appropriate to the external environment.
推薦
RS485 Remote Sensor Network
The PI7C9X754ZBEX can control up to four serial links in an RS485 remote-sensor network. The four-channel organization supports segmented traffic to remote sensor groups, while each 64-byte FIFO helps buffer short responses and request bursts. For a wired differential network, pair the controller with an appropriate RS485 transceiver and design termination, common-mode handling, surge protection, and grounding for the installation. The controller's 1.8 V, 2.5 V, and 3.3 V support can simplify integration with low-power embedded processors, but the complete power and signal levels of every external device must be checked. Firmware should use unique addressing, disciplined polling, and timeout handling to avoid simultaneous transmissions.
推薦
推薦產品摘要
工程參考資料，適用於 PI7C9X754ZBEX — 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 |
|---|---|
| Brand | Diodes Incorporated |
| Package | 48-terminal TQFN, 7 mm x 7 mm, exposed pad |
| UART Channels | 4 channels |
| FIFO Depth | 64 bytes per channel |
| Supply Voltage Options | 1.8 V, 2.5 V, or 3.3 V |
| RS485 Controller Support | Supported |
| IrDA Version | IrDA 1.1 |
| Temperature Grade | Industrial |
| Package Code | HVQCCN |
主要差異化特點
- Four independently buffered UART channels in one controller (對比A single-channel UART interface)
- Combines wired and infrared controller functions (對比An RS485-only UART interface)
- Supports low-voltage embedded processing platforms (對比A 3.3 V-only UART interface)
設計說明
Follow the manufacturer land pattern for the 48-terminal TQFN, including the exposed-pad opening, solder-mask definition, and recommended via arrangement. Place input and output bypass capacitors close to their associated supply and ground pins rather than distributing them around the board. Keep the exposed-pad path free from thermal-via keepouts so the package can transfer heat through the PCB.
Route each UART output away from clocks, reset lines, analog inputs, and other high-impedance nodes. If several channels leave the board, keep their return paths and connector-side protection organized to minimize crosstalk. The four independent FIFOs help with traffic bursts, but they do not prevent electrical noise from corrupting data; use controlled-impedance routing where required by the external interface specification.
Do not treat the UART controller as a complete RS485 or IrDA physical-layer solution. Select an external transceiver or optical interface for the intended link, including the correct baud-rate range, logic levels, isolation requirements, and protection. Also avoid assigning functions or GPIO states to the TQFN exposed pad; use the manufacturer pin and land-pattern documentation before releasing the PCB.
Decouple each supply rail locally and keep high-current transceiver connections away from the PI7C9X754ZBEX supply pins. When long external cables are present, place the ESD or surge-protection device near the connector and keep the protected path separated from sensitive logic. Validate receive levels and ringing at the interface with an oscilloscope because controller timing alone does not guarantee reliable cable communications.
合規資訊
The current product information identifies an industrial-grade surface-mount controller but does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
