PI7C9X752FAE - Dual UART with 64-Byte FIFO | Diodes Inc.
料号： PI7C9X752FAE ✓ 量产中PI7C9X752FAE 概述
A UART, or universal asynchronous receiver-transmitter, is a serial interface that converts parallel digital data into framed asynchronous serial signals and reverses that process on reception. Within the interface-controller hierarchy, a UART controller can include FIFO buffering, modem-control signaling, interrupt handling, and IrDA-compatible support. The PI7C9X752FAE is therefore positioned as a multi-channel communications IC rather than a general-purpose logic device or standalone transceiver.
The verified defining features are its dual-channel architecture, 1.62 V to 3.6 V operating range, 64-byte FIFO, and IrDA 1.1 capability. A FIFO helps decouple the host processor from temporary variations in serial traffic by buffering received or transmitted characters. The 1.62 V minimum operating voltage also makes the controller suitable for low-voltage embedded systems, provided that the attached processor, transceiver, and external circuitry use compatible logic levels.
The PI7C9X752FAE is listed as an RS485 controller, IrDA 1.1, and UART interface device. These functions make it relevant to systems that need multiple asynchronous serial channels, whether for external data acquisition, industrial equipment, infrared data links, or communications between a host controller and peripheral ICs. Because the verified data does not expose the complete register map, clock configuration, electrical timing limits, or pin assignments, those details must be checked in the manufacturer datasheet before final circuit design.
Typical implementation places the controller beside one or more external interface devices. One UART channel may connect to an RS-485 transceiver for a longer-distance industrial bus, while the other supports point-to-point serial equipment or an IrDA-compatible peripheral. The controller does not itself replace the physical-layer transceiver for RS-485 or infrared signaling, so appropriate external hardware remains necessary for those links.
Designers should confirm logic thresholds, peripheral clocking, interrupt requirements, and the manufacturer-recommended input and output capacitance before layout. Decoupling connections should be short, and the 7 mm by 7 mm TQFP footprint requires careful assembly planning because its 48 leads provide less routing space than a larger package. Signal-routing and grounding practices should also separate the controller's digital interfaces from external transceiver return paths.
This page consolidates the verified distributor descriptions, package information, interface functions, and availability evidence for PI7C9X752FAE. It also distinguishes confirmed capabilities from unavailable specifications, helping engineers evaluate the dual-UART controller before requesting the authoritative datasheet and committing the 48-TQFP footprint to a PCB design.
直接替换替代料： PI7C9X752FAE ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料PI7C9X752FAE 最大额定值与电气特性
| Product Type | Dual UART interface controller |
| Manufacturer | Diodes Incorporated |
| Number of UART Channels | 2 channels |
| Supply Voltage Range | 1.62 V to 3.6 V |
| FIFO Capacity | 64 bytes |
| IrDa Support | IrDA 1.1 |
| RS485 Interface | RS485 controller interface |
| Device Classification | UART interface IC |
| 封装 | 48-pin TQFP |
| Package Dimensions | 7 mm x 7 mm |
| 安装类型 | Surface mount |
PI7C9X752FAE 7 mm x 7 mm 引脚配置指南
PI7C9X752FAE（7 mm x 7 mm 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： PI7C9X752FAE.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PI7C9X752FAE 适用于 6 应用s: Industrial RS-485 Control Interface, Low-Voltage Embedded Data Acquisition, IrDA 1.1 Infrared Data Link, Dual Serial Port Bridge, Instrumentation and Test Equipment, Networked Embedded Peripheral.
Industrial RS-485 Control Interface
The PI7C9X752FAE fits a host-side industrial controller that needs two buffered UART channels and a 1.62 V to 3.6 V operating range. One channel can connect through a suitable external RS-485 transceiver, while the second can support diagnostics or another serial peripheral. The verified 64-byte FIFO helps buffer asynchronous traffic, and IrDA 1.1 support adds an option for short-range infrared links. Because the controller does not provide the physical RS-485 driver itself, the external transceiver must handle line-level signaling, isolation where required, and bus protection.
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Low-Voltage Embedded Data Acquisition
PI7C9X752FAE is appropriate for a low-voltage embedded acquisition system that must collect data through more than one serial source. Its two UART channels provide parallel communication paths, while the verified 64-byte FIFO can buffer bursts arriving from a sensor or instrument. The 1.62 V minimum operating voltage accommodates low-voltage system rails, subject to confirmation of the controller's I/O levels. Pair the device with appropriately buffered sensors or transceivers, and verify interrupt latency and FIFO allocation in the full datasheet before assigning traffic to each channel.
推荐
IrDA 1.1 Infrared Data Link
The PI7C9X752FAE supports IrDA 1.1, making it useful for an embedded infrared communication link between a processor and an IrDA-compatible peripheral. The controller's UART architecture can format serial traffic while the verified 64-byte FIFO helps absorb short transfer bursts. An optical transmitter and receiver are still required to convert the electrical UART signals into infrared light. Before finalizing the link, verify the supported baud rate, optical carrier requirements, receiver design, and timing limits because those details are not included in the verified product snippets.
推荐
Dual Serial Port Bridge
PI7C9X752FAE can bridge a host processor to two UART-based peripheral devices when a legacy parallel processor lacks sufficient serial channels. The 48-pin TQFP package consolidates two ports and their buffering into one component, helping reduce board area compared with two separate controllers. The verified 1.62 V to 3.6 V range supports low-voltage logic systems, but each peripheral must agree on baud rate, framing, signal polarity, and flow control. Firmware must also account for FIFO interrupt thresholds and simultaneous traffic from both channels.
推荐
Instrumentation and Test Equipment
The PI7C9X752FAE is suitable for instrumentation that needs two serial data paths, such as a controller communicating with a measurement module while also sending configuration or status information. Its 64-byte FIFO supports buffered transfers, and the low 1.62 V operating-voltage floor can simplify integration with modern low-voltage control electronics. For laboratory equipment connected over longer distances, add an appropriate RS-485 or RS-232 transceiver rather than relying on the UART logic pins directly. Grounding, shielding, and isolation should reflect the external cable environment.
推荐
Networked Embedded Peripheral
PI7C9X752FAE can support a networked embedded peripheral that exposes two serial services to a host processor. One UART may connect to a local Ethernet or USB interface, while the other handles an internal sensor or service port. The dual-channel architecture reduces serial-controller count, and the 64-byte FIFO helps absorb asynchronous traffic between host interrupts. The controller does not implement Ethernet or USB signaling, so those functions require separate interface devices. Validate baud-rate combinations, interrupt latency, and buffer ownership in firmware before using both ports under sustained load.
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推荐产品汇总
工程参考数据： PI7C9X752FAE ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 48-pin TQFP (7 mm x 7 mm) |
| Brand | Diodes Incorporated |
| UART Channels | 2 channels |
| Supply Voltage Range | 1.62 V to 3.6 V |
| FIFO Capacity | 64 bytes |
| IrDA Support | IrDA 1.1 |
| RS485 Function | RS485 controller interface |
| Verified Unit Price | $2.4063 as of 2026-10-28 |
关键差异点
- Two UART channels integrated in one controller （对比 MAX232DR)
- IrDA-capable serial interface （对比 SP485ECN-L)
- Low-voltage operation with buffered dual-port handling （对比 CP2102N-A01-GQFN20R)
设计说明
Place the device's supply-decoupling capacitors immediately adjacent to its supply and ground pins, following the connection diagram in the manufacturer datasheet. The verified results do not specify recommended capacitance values, ESR limits, or whether bulk capacitance is required, so those values must not be assumed. Keep high-current transceiver paths away from the controller's logic traces, provide a continuous ground reference beneath the TQFP footprint, and route UART signals away from switching nodes and high-current inductors.
Do not treat the PI7C9X752FAE UART logic pins as a complete RS-485 physical interface. A separate transceiver is required for RS-485 line impedance, drive strength, fail-safe behavior, and bus protection. Similarly, IrDA 1.1 support does not include an optical transmitter or receiver. Confirm the exact pinout, clock source, baud-rate range, FIFO ownership, interrupt scheme, and flow-control requirements in the authoritative datasheet before assigning either UART channel.
The 48-pin TQFP footprint is only 7 mm by 7 mm, so escape routing between the fine-pitch leads and the board's internal layers can be restrictive. Match the manufacturer land pattern exactly, consider via-in-pad only when supported by the assembly process, and avoid placing test points or vias where they interfere with lead inspection. Because the verified data does not identify pin assignments, no connection should be made until the complete numbered pinout has been cross-checked against the exact PI7C9X752FAE ordering code.
Operate the controller only within the verified 1.62 V to 3.6 V supply range. The supplied snippets do not separately confirm whether the UART I/O pins have an independent voltage domain, so signal-level compatibility with the host processor and external transceivers remains unverified. Use a stable low-noise supply, account for startup sequencing of attached devices, and avoid allowing transceiver-side voltage or bus protection events to backfeed the controller unless the datasheet expressly permits it.
合规信息
The supplied distributor snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance. These fields must be confirmed using the manufacturer product page or current material declaration.
