PI7C9X762BLEX - I2C/SPI to 2-Channel UART Bridge | Diodes
部品番号: PI7C9X762BLEX ✓ 生産中PI7C9X762BLEX 概要
An I2C/SPI-to-UART bridge is a serial interface controller within the broader UART interface IC and interface-controller hierarchy. It sits between a host processor and one or more asynchronous serial peripherals. The host communicates through I2C or SPI, while the bridge manages framing, baud-rate configuration, data transfer, and status reporting for the UART side. This approach reduces host pin count and centralizes protocol conversion in a dedicated device.
The PI7C9X762BLEX provides two UART channels and supports both I2C and SPI host-side operation. Its 28-pin TSSOP package suits compact industrial and embedded control assemblies where surface-mount construction is required. The manufacturer identifies the device as an I2C/SPI-to-2-channel UART bridge with a 3,000-unit standard package quantity.
The architecture separates the synchronous host interface from the asynchronous UART channels, allowing one host controller to service multiple serial devices. Each UART path can function as a communications endpoint for sensors, modems, test equipment, or industrial peripherals. I2C operation is useful when several low-to-medium-rate devices share a wired bus, while SPI provides a dedicated, higher-rate host connection for point-to-point embedded links.
Typical uses include automotive infotainment interfaces, industrial instrumentation, communications modules, and embedded controllers that need legacy serial ports. The device is also appropriate for prototype and production systems that need a compact protocol-conversion stage between an SPI-capable controller and two UART peripherals.
Designers should confirm the host-side logic levels, supported baud-rate range, parity format, flow-control method, and interrupt behavior against the manufacturer datasheet before layout. Because two UART channels share one host interface, firmware must also avoid simultaneous transactions that exceed the bridge's command and status-handling capacity.
ドロップイン代替品: PI7C9X762BLEX — 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。
PI7C9X762ALEX
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PI7C9X762BLEX 最大定格＆電気的特性
| Product Type | I2C/SPI to 2-Channel UART bridge controller |
| Manufacturer | Diodes Incorporated |
| Host Interface | I2C and SPI |
| UART Channels | 2 channels |
| パッケージ | 28-pin TSSOP |
| Standard Package Quantity | 3,000 pieces |
| 実装タイプ | Surface mount |
| UART Interface Type | Asynchronous serial UART interface |
| Automotive Qualification | Automotive I2C-Bus/SPI to UART bridge controller |
PI7C9X762BLEX 3,000 pieces ピン配置ガイド
PI7C9X762BLEX (3,000 pieces 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: PI7C9X762BLEX.
詳細は データシート をご参照ください。
主な用途
PI7C9X762BLEX の用途: 6 件s: Automotive Infotainment Serial Expansion, Industrial Sensor Gateway, Communications Module Interface, Test and Measurement Control Plane, Embedded Controller UART Expansion, Smart Home and IoT Controller Hub.
Automotive Infotainment Serial Expansion
The PI7C9X762BLEX fits automotive infotainment and body-control designs that already connect a host processor through I2C or SPI but still require legacy asynchronous serial ports. Its two UART channels provide a practical expansion path for modules, vehicle-network transceivers, and diagnostic accessories without assigning two dedicated UART peripherals to the host. The 28-pin TSSOP package supports compact surface-mount assemblies, while the automotive bridge-controller identification matches the intended vehicle-electronics environment. Firmware must define each channel's baud rate and framing before data transfer begins. Because the host port is shared, command arbitration and status polling should be designed around the bridge's register structure and interrupt behavior described in the manufacturer datasheet.
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Industrial Sensor Gateway
The PI7C9X762BLEX is suitable for an industrial sensor gateway in which an embedded controller gathers data over I2C or SPI while downstream instruments continue to use UART. The bridge converts host transactions into two asynchronous serial streams, allowing legacy pressure, temperature, positioning, or weighing modules to coexist with newer digital sensors. Its 28-pin TSSOP footprint leaves board area for connector isolation components and power regulation. Designers should confirm logic-level compatibility with both the host and attached devices, then allocate baud rates so continuous telemetry cannot starve the other channel. Galvanic isolation and surge protection requirements for long field cables remain separate PCB-level design tasks and should be evaluated for each installation environment.
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Communications Module Interface
The PI7C9X762BLEX can add two UART endpoints to a compact communications module whose main processor communicates through a synchronous serial bus. Both downstream channels can support modems, configuration ports, test fixtures, or external data modules while the host uses a single I2C or SPI connection. This arrangement is especially useful where processor pin multiplexing is already constrained by radio, memory, or high-speed digital interfaces. Firmware should maintain separate buffers and baud-rate settings for each channel because the bridge multiplexes both UART functions through one host port. The 28-pin TSSOP package also makes the design compatible with automated surface-mount assembly, provided that the recommended land pattern and reflow profile in the manufacturer documentation are followed.
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Test and Measurement Control Plane
The PI7C9X762BLEX fits test and measurement instruments that use an I2C- or SPI-based control processor while still needing UART links to legacy instruments or service ports. One UART can maintain a console connection and the other can reach an external fixture, reducing the number of host pins needed for external control. The two-channel architecture also permits simultaneous operation of command and data paths when firmware assigns nonconflicting baud rates. Because a bridge introduces command, status, and buffering latency, control software should use deterministic polling or documented interrupt signals instead of assuming zero-latency UART transmission. The 28-pin TSSOP package is practical for instrument daughterboards where connector spacing and EMI layout constrain component placement.
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Embedded Controller UART Expansion
The PI7C9X762BLEX is appropriate when a microcontroller has unused I2C or SPI capability but no practical UART hardware available. The controller converts those host transactions into two complete asynchronous channels for boot logs, configuration tools, sensors, or service connectors. This approach can avoid a larger processor or a more complex pin-muxing arrangement, particularly in compact embedded control boards. Firmware should configure the bridge registers during startup and verify each UART channel with a loopback or known test pattern before entering normal operation. Designers must also account for the shared host bandwidth and status-reporting latency when scheduling burst transfers, particularly if one channel streams continuous data while the other must answer time-critical commands.
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Smart Home and IoT Controller Hub
The PI7C9X762BLEX can serve as a serial-port concentrator in a smart-home controller that gathers settings over I2C or SPI while exposing two UART connections to local modules. Candidate endpoints include Zigbee or radio companion modules, access-control readers, and configuration adapters that retain legacy serial interfaces. The 28-pin TSSOP package supports compact enclosure electronics, and the dual-channel design reduces host wiring compared with two separate bridge devices. Firmware should keep channel configuration and buffer ownership clearly separated so incoming data from one peripheral cannot block service traffic on the other. For externally accessible connectors, add the required isolation, overvoltage protection, and chassis-ground strategy at the board level rather than relying on the bridge controller's internal interface ratings.
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おすすめ製品の概要
エンジニアリング参考データ: PI7C9X762BLEX — 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 | PI7C9X762ALEX |
|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated |
| Package | 28-TSSOP | 28-TSSOP - same footprint |
| Product Type | I2C/SPI to 2-channel UART bridge controller | I2C/SPI to 2-channel UART bridge controller |
| Host Interfaces | I2C and SPI | I2C and SPI |
| UART Channels | 2 channels | 2 channels |
主な差別化要因
- Adds two asynchronous serial ports without requiring dedicated UART pins on the host processor （vs PI7C9X762ALEX)
- Supports two host-side serial styles in one controller （vs PI7C9X762ALEX)
- Compact surface-mount integration for serial expansion （vs PI7C9X762ALEX)
設計ノート
Route the I2C or SPI host connection as the primary high-speed path and keep the two UART outputs away from sensitive analog or clock nets. Place pull-up resistors for I2C near the host and bridge rather than distributing them across the board, and use the shortest practical return-path connection to the device ground. The manufacturer datasheet controls the final land pattern, trace-impedance expectations, and whether unused inputs require termination.
Assign independent baud-rate and framing parameters to both UART channels, then calculate whether simultaneous traffic can exceed the bridge's buffering and status-update capability. Firmware should poll or service status deterministically and include timeout handling for a peripheral that stops responding. Avoid assuming that an I2C write and its resulting UART activity are completed at the same instant; allow for command, propagation, and status-reporting latency.
Do not treat the PI7C9X762BLEX as an RS-232 or RS-485 electrical transceiver. The bridge operates at logic levels and requires a separate level-conversion or physical-layer device when connected to legacy external ports. Also verify the grade suffix, supply range, and automotive qualification of any substitute against the manufacturer datasheet before releasing a new PCB or production build.
コンプライアンス情報
The manufacturer description identifies the PI7C9X762BLEX as an automotive I2C-Bus/SPI-to-UART bridge controller. Specific RoHS, REACH, AEC-Q100 grade, lead-free, halogen-free, and conflict-minerals statements require confirmation from the manufacturer documentation.