LAN91C93I-MS - 10Mbps Ethernet Controller | Microchip
MPN： LAN91C93I-MS ✓ 啟用中LAN91C93I-MS 概覽
An Ethernet controller is an interface IC that manages frame transmission and reception between a host processor and an Ethernet physical layer. In this product hierarchy, the LAN91C93I integrates an IEEE 802.3 Ethernet MAC, a 10BASE-T PHY interface, and a local-bus host interface. This integration reduces external component count compared with a design using a separate network controller and physical-layer transceiver, while preserving a conventional processor-facing software interface.
Key features include a 10 Mbps data rate, support for full-duplex switched Ethernet, and independent transmit and receive operations. The LAN91C93I architecture incorporates the local-bus functionality associated with the LAN91C92 family. The manufacturer datasheet also states that the controller is 100% software compatible with the LAN91C92, LAN91C94, and LAN91C96 in local-bus mode, which can simplify firmware migration among supported controller generations.
The controller uses a local-bus architecture rather than a PCI interface, making it appropriate for embedded processors and custom bus designs that do not expose PCI host connectivity. Its integrated 10BASE-T PHY interface connects the digital Ethernet controller to a compliant network physical layer. Support for full-duplex switched Ethernet permits simultaneous sending and receiving, unlike designs restricted to half-duplex shared-network operation.
Typical uses include industrial monitoring equipment, embedded test systems, legacy factory controls, serial-to-Ethernet equipment, and compact data-acquisition platforms. In these systems, the local-bus interface connects the Ethernet controller to a host processor, while the 10BASE-T PHY interface connects the board to copper Ethernet. Designers should confirm the required host-bus timing, transceiver characteristics, and electrical isolation before integrating the controller into a new design.
The principal design consideration is interface compatibility. LAN91C93I is intended to maintain software compatibility with selected LAN91C92, LAN91C94, and LAN91C96 devices in local-bus mode, but software compatibility alone does not guarantee unconditional PCB interchangeability. Confirm package dimensions, pin assignments, supply sequencing, clock requirements, and transceiver characteristics in the manufacturer datasheet before releasing a replacement or respin.
This page organizes the controller’s key electrical, packaging, compatibility, application, and design information into an engineering-focused reference. It also distinguishes verified drop-in candidates from broader software-compatible family members, helping procurement and design teams assess replacements with the appropriate technical checks.
直接替換替代品，適用於 LAN91C93I-MS — 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。
此系列的變體
與下列產品可直接替換的同系列型號： LAN91C93I-MS （相同外形與佔位） — 差異在於 Package Type, Supply Voltage.
LAN91C92
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LAN91C94
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LAN91C96-MS
✅ 直接替換聯絡詢價
查看資料表 →LAN91C93I-MS 規格
| Product Type | Single-chip Ethernet controller |
| Ethernet Standard | IEEE 802.3 |
| 資料速率 | 10 Mbps |
| Physical-Layer Interface | 10BASE-T PHY interface |
| Bus Interface | Local bus, non-PCI |
| Duplex Support | Full-duplex switched Ethernet |
| Transmit and Receive | Fully independent transmit and receive operations |
| 供應電壓 | 3.3 V or 5 V |
| Package Type | 100-QFP |
| Package Dimensions | 14 x 20 mm |
| 安裝類型 | Surface mount |
| Shipping Package | Tray |
| Software Compatibility | 100% compatible with LAN91C92, LAN91C94, and LAN91C96 in local-bus mode |
| Integrated PHY | 10BASE-T PHY interface integrated |
LAN91C93I-MS tray 腳位配置指南
LAN91C93I-MS（tray 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： LAN91C93I-MS.
請參閱 資料表 以查看完整腳位配置。
典型應用
LAN91C93I-MS 適用於 6 應用s: Industrial Monitoring Controller, Embedded Test and Measurement, Legacy Factory Equipment Interface, Serial-to-Ethernet Data Gateway, Compact Data Acquisition Platform, Network-Enabled Control Panel.
Industrial Monitoring Controller
The LAN91C93I-MS fits an embedded industrial monitoring system that must report sensor, machine, or process data over 10 Mbps Ethernet. Its non-PCI local-bus interface is suitable for a host processor without PCI connectivity, while the integrated IEEE 802.3 10BASE-T PHY interface reduces the need for a separate physical-layer device. According to the manufacturer datasheet, full-duplex switched Ethernet and independent transmit and receive paths support simultaneous data collection and network communication. The 3.3 V or 5 V supply options also permit integration into mixed-voltage embedded platforms, although the final design must verify the complete temperature range, isolation arrangement, Ethernet magnetics, and PCB pin assignments.
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Embedded Test and Measurement
The LAN91C93I-MS can provide network access for an embedded test instrument, data logger, or laboratory controller. The 10 Mbps IEEE 802.3 interface is sufficient for transferring moderate volumes of measurement data and configuration commands, while independent transmit and receive paths allow the instrument to maintain acquisition activity while sending results. Its non-PCI local-bus architecture fits processors and custom bus masters that do not provide PCI connectivity. The manufacturer datasheet identifies the controller as software compatible with LAN91C92, LAN91C94, and LAN91C96 in local-bus mode, which can help preserve firmware behavior when planning product variants. Clocking, magnetic-component selection, grounding, and connector isolation should be finalized from the manufacturer’s reference design.
推薦
Legacy Factory Equipment Interface
The LAN91C93I-MS is applicable when modernizing legacy factory equipment that needs an Ethernet communication path but retains a local-bus processor architecture. Its 100-QFP package and local-bus interface support integration with established embedded control architectures, and the integrated 10BASE-T PHY interface connects directly to a compliant Ethernet physical layer. Full-duplex switched Ethernet can improve behavior on modern switched factory networks compared with shared-media operation. The LAN91C93I-MS is also a candidate for maintaining the LAN91C family software environment because the manufacturer documents local-bus software compatibility with the LAN91C92, LAN91C94, and LAN91C96. Production adoption should include EMC testing, network-connector grounding review, and confirmation of the operating-temperature requirement.
推薦
Serial-to-Ethernet Data Gateway
The LAN91C93I-MS can form the Ethernet side of an embedded serial-to-Ethernet gateway by placing the controller between a host processor and a 10BASE-T network connection. Its local-bus interface is suitable for processors that already manage serial ports, protocol conversion, and local storage, while the integrated PHY removes a separate Ethernet transceiver from the signal path. The 10 Mbps rate supports typical supervisory traffic, configuration exchange, and periodic telemetry rather than high-bandwidth data transfer. Independent transmit and receive operations are valuable in gateways that must acknowledge commands while uploading records. Designers should account for protocol latency, Ethernet transformer selection, isolation requirements, and the exact package-pin assignments shown in the manufacturer datasheet.
推薦
Compact Data Acquisition Platform
The LAN91C93I-MS suits compact data-acquisition platforms that must move sensor samples or processed results to a host over Ethernet. The integrated 10BASE-T interface and 10 Mbps operation provide a straightforward network path without requiring PCI, while the local-bus host interface can coexist with sampling, storage, and signal-conditioning circuitry. Full-duplex switched Ethernet permits simultaneous command reception and result transmission, reducing the chance that one direction blocks the other. Its 3.3 V or 5 V operating choices support both conventional embedded rails. Before layout, verify the clock requirements, magnetic components, trace routing, return paths, and thermal performance using the manufacturer application information; the controller’s status does not imply suitability for every industrial temperature range.
推薦
Network-Enabled Control Panel
The LAN91C93I-MS can provide wired Ethernet connectivity in a network-enabled control panel built around a local-bus processor. The controller handles 10BASE-T frame communication while the host manages user input, display functions, alarms, and supervisory commands. Its non-PCI architecture simplifies integration with processors designed for embedded control rather than desktop expansion. Full-duplex switched Ethernet is useful for panels that continue responding to local commands while uploading logs or accepting remote updates. According to the Microchip Technology datasheet, local-bus software compatibility with LAN91C92, LAN91C94, and LAN91C96 can reduce driver-development effort for related product platforms. Final certification should cover electromagnetic immunity, network isolation, environmental exposure, and the product-specific safety requirements.
推薦
推薦產品摘要
工程參考資料，適用於 LAN91C93I-MS — 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 | LAN91C92 | LAN91C94 | LAN91C96 |
|---|---|---|---|---|
| Package | 100-QFP (14 x 20 mm) | 100-QFP | 100-QFP | 100-PQFP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Host Interface | Local bus, non-PCI | Local bus | Local bus | Local bus |
| Local-Bus Software Compatibility | Compatible with LAN91C92, LAN91C94, and LAN91C96 | Software-compatible family member | Software-compatible family member | Software-compatible family member |
主要差異化特點
- Full-duplex switched-Ethernet support (對比LAN91C92)
- Independent transmit and receive operation (對比LAN91C94)
- Integrated 10BASE-T PHY with non-PCI host interface (對比LAN91C96)
設計說明
Use the manufacturer package drawing and pin-description table as the layout authority for the 100-QFP device. Place the local-bus interface, clock circuitry, reset network, and 10BASE-T connection in the arrangement shown by the manufacturer reference design. Keep high-current supply paths and decoupling connections compact, and preserve the required ground-plane continuity beneath the device. A complete pinout was not reproduced because a package-specific manufacturer pin table was not available for transcription.
Treat clock, local-bus, and Ethernet-side routing as separate constraint groups. Keep clock traces short, maintain continuous reference planes, and avoid routing disruptive switching signals beneath the Ethernet interface area. Follow the manufacturer’s recommended termination, pull-up, pull-down, and decoupling values when they are available. If the clock source is external, verify its amplitude, frequency tolerance, jitter, and startup sequence against the LAN91C93I electrical requirements rather than relying on nominal host-clock specifications.
Do not interpret local-bus software compatibility as proof that any LAN91C92, LAN91C94, or LAN91C96 variant is automatically interchangeable with LAN91C93I-MS. Confirm the exact suffix, package dimensions, pin assignments, supply levels, clock configuration, reset requirements, and Ethernet connection before substituting a part. The same caution applies to software revisions and register behavior: validate the driver and Ethernet traffic against the selected controller in the final system.
Apply the manufacturer’s Ethernet magnetic-component and connector-layout guidance to control common-mode noise and maintain signal integrity. The controller’s integrated 10BASE-T interface does not eliminate the need for a compliant network transformer, suitable termination, controlled return paths, and a correctly designed RJ45 magnetic module. Evaluate radiated and conducted emissions at the final enclosure and cable configuration because PCB traces and chassis grounding can materially affect compliance.
合規資訊
No explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements were identified for the exact LAN91C93I-MS ordering code. These fields remain unknown rather than being inferred from the manufacturer or package family.
