KSZ8081RNACA TR Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
KSZ8081RNACA TR is an IEEE 802.3 10BASE-T/100BASE-TX Ethernet PHY transceiver from Microchip operating at 3.3 V with RMII and MII host interface options in a 24-pin QFN package. It supports Auto-MDI/MDIX and auto-negotiation for plug-and-play connectivity. Suitable for industrial Ethernet, embedded networking, and IoT gateway designs requiring compact 100 Mbps physical layer integration.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 25
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- Price
- From $0.9141(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of KSZ8081RNACA TR?
- IEEE 802.3 compliant 10BASE-T/100BASE-TX PHY with RMII interface reducing host processor pin count to 10 signals
- Auto-MDI/MDIX and auto-negotiation eliminate straight-through versus crossover cable requirements in field installations
- Single 3.3 V supply operation in compact 24-pin QFN package enabling integration into space-constrained industrial IoT modules
What is KSZ8081RNACA TR used for?
KSZ8081RNACA TR provides the physical layer for 10/100 Mbps Ethernet connectivity in industrial controllers, PLCs, and embedded gateways where compact board size and single-supply operation are required. Its RMII interface connects directly to ARM Cortex-M and MIPS microcontrollers with integrated Ethernet MACs, reducing external component count and simplifying firmware development. The device is also deployed in home automation hubs, IP cameras, and medical device Ethernet ports where reliable auto-negotiation and MDI/MDIX simplify cable installation.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for KSZ8081RNACA TR?
Compatible alternatives and drop-in replacements for KSZ8081RNACA TR:
Frequently Asked Questions
What Ethernet speeds and host interface modes does KSZ8081RNACA TR support?
KSZ8081RNACA TR supports both 10BASE-T at 10 Mbps and 100BASE-TX at 100 Mbps with auto-negotiation to select the highest common speed. The host interface is selectable between RMII (10 signals at 50 MHz reference clock) and MII (18 signals at 25 MHz), allowing compatibility with microcontrollers that expose either MAC interface variant.
How does KSZ8081RNACA TR's Auto-MDI/MDIX feature simplify industrial Ethernet cable management?
Auto-MDI/MDIX automatically detects and corrects the transmit/receive pair orientation, eliminating the need for crossover cables when connecting switch-to-switch or device-to-device. In factory installations with 100 m CAT5e runs, this saves approximately 2 minutes per connection during commissioning and removes the risk of field engineers using the wrong cable type, reducing installation error rates in 24-port control cabinet panels.
For an embedded Linux board with an integrated Ethernet MAC, how many external components does KSZ8081RNACA TR require?
KSZ8081RNACA TR typically requires a 25 MHz crystal or 50 MHz oscillator, a common-mode choke, 4 capacitors for AC coupling, and an RJ-45 jack with integrated magnetics — totaling approximately 8 to 12 passives. The single 3.3 V supply removes the need for additional LDO regulators, keeping the total BOM addition under 15 components for a complete 100 Mbps Ethernet port on a constrained IoT board.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.0365 | $1.04 |
| 10+ | $0.9141 | $9.14 |
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