PI7C9X762CZHE - SPI-UART Bridge | Diodes Incorporated
部品番号: PI7C9X762CZHE ✓ 生産中PI7C9X762CZHE 概要
A UART bridge is an interface integrated circuit that translates a parallel or synchronous host-bus transaction into serial data using a standard UART framing format. The PI7C9X762 belongs to the broader UART controller, interface IC, serial-communication semiconductor, and embedded-interface hierarchy. It is intended for systems in which a host processor needs to reach UART-based peripherals while using a synchronous serial connection on the host side.
The PI7C9X762 adds automatic hardware and software flow control to its 16C450-compatible register set. It also provides automatic RS-485 support, fractional baud-rate generation, and software reset. Fractional baud-rate support allows the interface to represent baud rates that are not exact integer multiples of a conventional base clock. Software reset permits the UART to be reinitialized independently of the hardware reset signal, improving recovery after configuration errors or peripheral communication failures.
The serial architecture combines an SPI or I2C host-side transaction mechanism with UART transmit and receive functions. Internal registers organize baud-rate generation, modem-control signals, interrupt identification, flow-control status, and buffer management. This arrangement allows embedded systems to connect a processor using a compact synchronous bus to an external UART peripheral without implementing a complete UART state machine in programmable logic or software.
Typical uses include industrial serial adapters, test and measurement equipment, embedded control panels, point-of-sale terminals, printers, scanners, and RS-485 equipment. The automatic RS-485 feature can simplify designs that require driver-enable behavior, while automatic flow control helps prevent transmitter overrun when a connected device cannot accept data at the selected baud rate.
Board design should preserve the exact pin assignments, power-supply requirements, and recommended decoupling specified in the manufacturer datasheet. Because the package exposes both synchronous host-side signals and UART signals, careless routing near high-current outputs or long external lines can introduce noise or ringing. The SPI or I2C traces should be kept compact, while external UART and RS-485 routes require suitable termination and protection according to the connected cable and interface environment.
This product page consolidates the identified PI7C9X762CZHE package information, supported bridge functions, UART compatibility, comparison details, and practical interface-design guidance. It also distinguishes the directly documented same-package family alternative from unverified substitutes so engineers can make a PCB-compatible sourcing decision without treating generic cross-reference results as guaranteed drop-ins.
ドロップイン代替品: PI7C9X762CZHE — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
PI7C9X762BZHEX
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PI7C9X762CZHE 最大定格＆電気的特性
| Product Type | UART interface controller and SPI-to-UART bridge |
| Host-Side Interface | SPI or I2C |
| Serial Interface | UART |
| UART Register Compatibility | Backward-compatible with the 16C450 UART |
| Automatic Hardware Flow Control | Supported |
| Automatic Software Flow Control | Supported |
| RS-485 Support | Automatic RS-485 support |
| Fractional Baud Rate Support | Supported |
| Software Reset | UART can be reset independently of the hardware reset signal |
| パッケージ | 32-lead TQFN, 5 mm x 5 mm |
| 実装タイプ | Surface mount |
| Number of Leads | 32 |
PI7C9X762CZHE 32-lead tqfn, 5 mm x 5 mm ピン配置ガイド
PI7C9X762CZHE (32-lead tqfn, 5 mm x 5 mm パッケージ) のピン配置。 このパワーデバイスは、ゲート、ドレイン、ソース端子を備えています。非極性パッケージの場合、正確なピン1の向きとフットプリントの詳細については、メーカーのデータシートを参照してください。主な用途には、電源設計、モータ駆動、負荷スイッチングがあります。
詳細なピン配置データはありません: PI7C9X762CZHE.
詳細は データシート をご参照ください。
主な用途
PI7C9X762CZHE の用途: 6 件s: Industrial Serial Adapters, RS-485 Control Panels, Point-of-Sale Terminals, Test and Measurement Equipment, Embedded Printer and Scanner Interfaces, RS-485 Data Acquisition.
Industrial Serial Adapters
The PI7C9X762CZHE fits industrial adapters that need to connect a synchronous processor interface to a UART-based sensor, controller, or service port. Its SPI or I2C host-side interface avoids implementing a UART state machine in the host controller, while the 16C450-compatible register organization eases driver migration. Automatic hardware and software flow control helps prevent overrun when a peripheral cannot accept data continuously, and fractional baud-rate support accommodates clock ratios that do not produce an exact integer divider. The design should still verify cable length, ground potential, electrical protection, and the required UART signaling level before board release.
おすすめ
RS-485 Control Panels
The PI7C9X762CZHE is suitable for control panels that translate a host processor's SPI or I2C transactions into a UART stream and then drive an external RS-485 interface. Its automatic RS-485 support reduces the burden of manually coordinating transmit-enable timing in the host driver. The 32-lead TQFN package also supports compact multi-interface boards, while software reset provides an independent recovery mechanism for the UART. In a production design, use a suitably rated RS-485 transceiver, add surge and ESD protection at exposed connectors, and validate the direction-control timing across cable lengths and grounding conditions.
おすすめ
Point-of-Sale Terminals
Point-of-sale terminals can use the PI7C9X762CZHE to connect a host processor to a UART-based receipt printer, scanner, customer display, or card-accessory interface. The SPI or I2C host connection is useful when the main processor already uses a synchronous bus and needs to add legacy UART capability without dedicating a separate UART peripheral. The 16C450-compatible register set provides a familiar software model, and automatic flow control can prevent transmitter overrun when a printer or scanner temporarily cannot accept characters. Firmware should define timeout, reset, and partial-character handling because peripheral behavior can vary by vendor.
おすすめ
Test and Measurement Equipment
The PI7C9X762CZHE can bridge a test-and-measurement controller to legacy UART instruments or service interfaces. Fractional baud-rate support is particularly useful when the desired rate is derived from a system clock that does not permit an exact integer divider. Software reset allows a host to recover the UART independently of the board-level reset line, while automatic hardware and software flow control helps maintain protocol integrity during variable-rate instrument responses. Instrument interfaces frequently include long cable runs, so the design should use appropriate protection, isolation where required, and signal-level-compatible transceiver circuitry.
おすすめ
Embedded Printer and Scanner Interfaces
Embedded printers, barcode scanners, and optical readers commonly expose UART service interfaces, making the PI7C9X762CZHE useful in gateways that must preserve a simple peripheral connection while using a faster host-side bus. The controller converts SPI or I2C commands into framed UART data and provides programmable flow-control behavior for devices that pause during transmission. Its 5 mm by 5 mm TQFN-32 package helps conserve board area in compact equipment. Firmware should include device-detection, baud-rate negotiation, timeout, and reset handling, while the PCB should keep UART routing away from switching power nodes and noisy display or motor circuitry.
おすすめ
RS-485 Data Acquisition
The PI7C9X762CZHE can support data-acquisition systems where a central controller communicates with remote sensors over RS-485 while using SPI or I2C locally. Automatic RS-485 support helps manage the transition between transmitting requests and receiving responses, reducing software complexity compared with manually controlling a driver-enable signal. Fractional baud-rate generation supports exact communication targets derived from the system clock, and software reset helps recover a UART after a protocol timeout. Deployment quality still depends on isolated or non-isolated transceiver selection, surge protection, cable termination, grounding, and validation across the full industrial temperature range.
おすすめ
エンジニアリング参考データ: PI7C9X762CZHE — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PI7C9X762BZHEX |
|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated |
| Package | TQFN-32 (5x5) | TQFN-32 (5x5) |
| Product Type | UART interface controller and SPI-to-UART bridge | UART interface IC and SPI bridge |
主な差別化要因
- Combines SPI or I2C host connectivity with a compatible UART function （vs PI7C9X762BZHEX)
- Adds automatic RS-485 support to the UART interface （vs PI7C9X762BZHEX)
- Provides UART reset independently of the hardware reset signal （vs PI7C9X762BZHEX)
設計ノート
Place the SPI or I2C interface traces directly between the host controller and PI7C9X762CZHE, keeping the route short and away from switching-regulator power nodes. The manufacturer datasheet's pin-description table should be used to assign every TQFN lead and to determine the exposed-pad connection. Confirm the final land pattern, paste geometry, and thermal requirements against the package drawing rather than relying only on a generic 5 mm by 5 mm QFN footprint.
Treat the UART and RS-485 routes as potentially noisy or long-running interfaces even when the host-side SPI or I2C connection is short. Maintain a continuous ground reference, keep external lines away from switching nodes, and use the required series damping, biasing, termination, or protection specified by the attached transceiver and cable environment. Validate edge rates and signal integrity at the connector with the intended peripheral attached.
Do not assume that every PI7C9X762 ordering suffix is an unconditional drop-in option. Compare the exact ordering code, pin assignments, electrical limits, temperature range, packing configuration, and lifecycle status before changing a released design. Software should also exercise the independent UART reset, automatic flow-control behavior, fractional baud-rate calculations, and RS-485 direction transitions during system validation.
コンプライアンス情報
No definitive RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status was present in the identified product records. Confirm these attributes with the manufacturer before qualification.
