PI7C8954AFHE - PCI Quad UART Bridge | Diodes Incorporated
料号： PI7C8954AFHE ✓ 量产中PI7C8954AFHE 概述
A PCI-to-UART bridge is an interface controller that allows a host system operating across a PCI bus to exchange serial data with up to four UART peripherals. In the product hierarchy, the PI7C8954AFHE is an interface IC, a PCI bridge, and a multi-channel UART interface controller. This bridge function places it between a PCI-capable embedded or industrial system and external serial devices, reducing the need for four separate host-interface adapters.
The verified listing identifies the PI7C8954AFHE as a four-channel UART bridge in a 144-LQFP package. It is associated with 3 V and 5 V UART-controller applications, while a separate distributor listing classifies the product as a PCI bridge and PCI-to-UART interface. These attributes make it relevant to embedded systems, industrial controllers, data-acquisition equipment, multiport communication systems, and legacy PCI systems that require several serial ports.
The 144-LQFP construction distinguishes the PI7C8954AFHE from single-channel UART transceivers such as MAX232DR or USB-to-UART devices such as CP2102N-A01-GQFN20R. Its defining advantage is integration: one PCI-to-quad-UART device consolidates four UART channels behind a single PCI host interface. The available source data does not expose detailed clocking, electrical, timing, or channel-level specifications, so those values should be confirmed against the manufacturer datasheet before design release.
A typical integration places the bridge on a PCI host board, connects each UART channel to the required serial transceiver or logic-level interface, and routes power and ground carefully across the 144 leads. System designers must account for the available voltage domains, peripheral interface requirements, signal integrity, and thermal performance associated with the large LQFP package.
The principal design consideration is verification: the supplied search results confirm the bridge function, four UART channels, 144-LQFP package, 20 mm by 20 mm body size, inventory, and one unit price, but they do not provide a complete manufacturer pin table or electrical limit table. Confirm pin assignments, operating voltages, PCI signaling details, UART baud-rate behavior, and power requirements against the authoritative datasheet before PCB routing or firmware development.
This page consolidates verified distributor inventory, pricing, package information, interface classification, cross-reference findings, and practical implementation guidance. It clearly separates confirmed PI7C8954AFHE attributes from unverified details and avoids presenting unsupported substitutes as guaranteed drop-in replacements.
直接替换替代料： PI7C8954AFHE ——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PI7C8954AFHE 最大额定值与电气特性
| Product Type | PCI-to-quad-UART interface bridge |
| Manufacturer | Diodes Incorporated |
| UART Channel Count | 4 channels |
| Host Interface | PCI |
| 封装 | 144-pin LQFP |
| Package Body Size | 20 mm x 20 mm |
| 安装类型 | Surface mount |
| UART Voltage Classification | 3 V and 5 V UART-controller applications |
| RoHS 状态 | RoHS3 compliant |
| Observed Distributor Inventory | 4,160 pieces |
| Observed Unit Price | USD 21.2311 per piece |
PI7C8954AFHE 20 mm x 20 mm 引脚配置指南
PI7C8954AFHE（20 mm x 20 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： PI7C8954AFHE.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PI7C8954AFHE 适用于 6 应用s: Industrial PCI Control Console, Legacy PCI Multiport Expansion, Data Acquisition Equipment, Embedded Communication Gateway, Point-of-Sale and Peripheral Hub, Robotics and Automation Controller.
Industrial PCI Control Console
The PI7C8954AFHE fits an industrial PCI control console that must expose four serial ports to a host computer. Its confirmed PCI-to-quad-UART architecture consolidates four serial channels behind one PCI interface rather than requiring four independent adapters. The 144-pin LQFP package is appropriate for a multilayer control board where routing density is available. Designers should obtain the complete pin assignment and PCI electrical data before assigning connectors, because the supplied sources do not confirm channel-level timing or voltage limits.
推荐
Legacy PCI Multiport Expansion
The PI7C8954AFHE is suitable for adding four UART channels to an embedded or industrial system built around the legacy PCI bus. The device provides one host-facing PCI interface and four UART outputs, reducing connector count and the need for separate single-channel PCI UART adapters. Its 20 mm by 20 mm 144-LQFP package requires careful high-density layout, but it avoids adding four separate bridge packages. Signal routing and bus termination must follow the verified manufacturer schematic rather than distributor summaries.
推荐
Data Acquisition Equipment
The PI7C8954AFHE can support a PCI data-acquisition controller requiring four UART links for sensors, instruments, or laboratory modules. Multiple channels allow a single host interface to manage several serial instruments, which is useful where USB adapters would add unnecessary host-controller loading. The final design must verify baud-rate support, interrupt behavior, electrical levels, and isolation requirements. The verified 3 V and 5 V UART-controller classification provides an initial compatibility signal but is not a substitute for detailed timing data.
推荐
Embedded Communication Gateway
The PI7C8954AFHE is a practical choice for a PCI-based communication gateway that must aggregate four UART links into one host interface. It can serve as the bridge between a host computer and downstream controllers, meters, modems, or service equipment. Consolidation lowers component count and simplifies software addressing through one PCI device. Engineers should confirm interrupt topology, UART baud-rate limits, and connector-side transceiver requirements before deployment; those details were not present in the verified search data.
推荐
Point-of-Sale and Peripheral Hub
The PI7C8954AFHE can support a PCI-based point-of-sale terminal or peripheral hub that needs several UART connections for scanners, printers, or serial equipment. Four UART channels behind one PCI device simplify expansion compared with four separate adapters, while the surface-mount LQFP package is compatible with automated PCB assembly. The board must preserve adequate ground and power distribution across the 144 leads. Verify electrical levels and timing for each peripheral before assuming that the four channels share identical implementation requirements.
推荐
Robotics and Automation Controller
The PI7C8954AFHE fits a PCI robotics or automation controller that connects multiple sensors, actuators, or service interfaces over UART. Four integrated channels provide a practical bridge between the PCI host and distributed serial devices while maintaining a compact surface-mount implementation. The interface bridge does not itself solve electrical-level isolation, ground-loop, or long-cable issues; appropriate transceivers and protection are still needed. Verify operating-temperature and industrial qualification requirements against the manufacturer documentation.
推荐
推荐产品汇总
工程参考数据： PI7C8954AFHE ——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 |
|---|---|
| Product Type | PCI-to-quad-UART interface bridge |
| UART Channels | 4 channels |
| Host Interface | PCI |
| Package | 144-pin LQFP |
| Package Body Size | 20 mm x 20 mm |
| Brand | Diodes Incorporated |
| UART Voltage Classification | 3 V and 5 V UART-controller applications |
| RoHS Status | RoHS3 compliant |
| Observed Inventory | 4,160 pieces |
| Verified Unit Price | USD 21.2311 per piece as of 2026-10-28 |
关键差异点
- Four UART channels integrated behind one PCI interface （对比 Single-channel MAX232DR)
- PCI host connectivity in a multiport bridge （对比 CP2102N-A01-GQFN20R)
- Multi-channel legacy expansion in one surface-mount package （对比 P82B96DR)
设计说明
Do not begin the 144-pin LQFP footprint or PCI routing until the authoritative PI7C8954AFHE drawing and pin table have been checked. The verified data confirms a 20 mm by 20 mm 144-LQFP package but does not state lead pitch, pin numbering, exposed-pad details, or individual signal assignments. Confirm those items and compare them mechanically and electrically with the selected distributor footprint before releasing Gerber files.
Plan a clean power-distribution network for the bridge, but do not assign rail voltage, decoupling values, or power sequencing until the manufacturer electrical characteristics are available. The supplied sources mention 3 V and 5 V UART-controller applications but do not identify which voltage applies to each supply domain. Use the datasheet to determine every supply, allowable range, current, and sequencing requirement; then place the required high-frequency and bulk capacitance at the corresponding pins.
Treat the PCI side as a high-speed multipoint interface and the UART side as a clocked serial interface; the two require different routing strategies. Follow the manufacturer reference layout for PCI trace geometry, layer transitions, decoupling, and return paths. Keep UART routing away from switching nodes and noisy clock sources, use appropriate series termination where specified, and confirm logic-level translation for each external connector rather than assuming that all four channels share the same electrical standard.
Do not treat a search-result classification as a complete electrical specification or infer a drop-in replacement from the 144-LQFP package alone. The product has four UART channels, but channel baud rates, interrupt behavior, FIFO architecture, voltage domains, and PCI timing were not supplied. Validate those parameters, device IDs, driver support, and connector standards before production use. For any proposed substitute, perform a pin-by-pin and function-by-function comparison against the original datasheet.
合规信息
The verified Diodes-Electronic result identifies PI7C8954AFHE as RoHS3 compliant. It is a PCI-to-UART interface bridge used in industrial and embedded equipment rather than an automotive-qualified device, so AEC-Q100 is not applicable based on the available data. No verified REACH, lead-free, halogen-free, or conflict-minerals declaration was supplied.
