Microchip KSZ8794CNXIC Datasheet
The Microchip KSZ8794CNXIC is an integrated Layer 2-managed Ethernet switch designed for cost-sensitive networking applications requiring three 10/100 Mbps copper ports and one 10/100/1000 Mbps Gigabit uplink. It integrates Ethernet MACs, PHY transceivers, switching logic, frame buffering, address lookup, VLAN, QoS, security, and management functions into a compact 64-pin QFN package.
The KSZ8794CNX supports RGMII, MII, and RMII interfaces on its Gigabit uplink port, giving system designers flexibility when connecting the switch to a host processor or network controller. It also supports IEEE 802.3/802.3u Ethernet standards, IEEE 802.1Q VLAN, IEEE 802.1p QoS, Rapid Spanning Tree Protocol, IGMP snooping, Wake-on-LAN, and Energy Efficient Ethernet.
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Part Number: KSZ8794CNXIC
Manufacturer: Microchip Technology
Stock: 6K pcs
Date Code: 22+
Package: VQFN64
Technical Specifications
| Parameter | Specification |
| Manufacturer | Microchip Technology |
| Device Type | 4-Port Managed Ethernet Switch |
| Ethernet Ports | 3 × 10/100 Mbps + 1 × Gigabit uplink |
| Ethernet Standard | IEEE 802.3 / 802.3u |
| Uplink Interface | RGMII / MII / RMII |
| Operating Temperature | -40°C to +85°C |
| Temperature Grade | Industrial |
| Analog Supply | 2.5V or 3.3V |
| Digital I/O Supply | 1.8V / 2.5V / 3.3V |
| Core Supply | 1.2V |
| Package | 64-pin QFN, 8 × 8 mm |
| RoHS | Lead-free, RoHS-compliant package |
The datasheet specifies 3.3V or 2.5V analog power, selectable 1.8V/2.5V/3.3V I/O power, and a 1.2V core supply. It also identifies the 64-pin QFN package as lead-free and RoHS-compliant.
Key Features of Microchip KSZ8794CNXIC
The KSZ8794CNXIC combines switching and physical-layer functions to reduce external component requirements and PCB complexity. Three integrated 10/100BASE-T/TX MAC/PHY ports are complemented by a fourth GMAC supporting RGMII, MII, or RMII.
For managed networking applications, the part provides:
IEEE 802.1Q VLAN support with up to 128 active VLAN groups
Four priority queues for QoS/CoS traffic management
Port-based and rule-based ACLs
802.1x port-based and MAC-based security
IGMP v1/v2/v3 snooping
Programmable ingress and egress rate limiting
Rapid Spanning Tree Protocol support
64 KB frame buffer and 1K-entry forwarding table
LinkMD cable diagnostics
Energy Efficient Ethernet and Wake-on-LAN support
For system integration, the switch can be managed through a high-speed SPI interface or MDC/MDIO, while a 25 MHz reference clock is supported.
Supply Chain and Procurement Insights
The KSZ8794CNXIC is the industrial-temperature version of the KSZ8794CNX family. Microchip's ordering information specifies the “I” temperature code as -40°C to +85°C, while the commercial “C” version is rated from 0°C to +70°C. Both use the 64-pin QFN package.
Current distributor listings indicate that this part remains commercially available, but standard manufacturer lead-time information can extend into the 17–22 week range, depending on distributor and packaging format. At the same time, distributor inventory is available in the market, making in-stock sourcing relevant for buyers with immediate production requirements.
For procurement teams, this makes available inventory, date code, packaging, quantity, and traceability important points to confirm before placing a larger order.
Alternatives and Sourcing Options of KSZ8794CNXIC
When KSZ8794CNXIC availability becomes constrained, buyers can evaluate related Microchip Ethernet switch families, but these should not be treated as automatic drop-in replacements.
KSZ8795CLXIC – A related industrial-temperature managed Ethernet switch with four 10/100 copper ports and a Gigabit uplink. It uses an 80-pin LQFP package, so PCB and pin compatibility must be reviewed before substitution.
KSZ8775CLXIC – Another industrial Microchip Ethernet controller with MII/RMII interfaces and an 80-pin LQFP package. It can be considered for alternative designs where its port and interface configuration meets system requirements, but it is not a pin-for-pin replacement for the KSZ8794CNXIC.
Applications of KSZ8794CNXIC
The KSZ8794CNXIC is suitable for a broad range of embedded and industrial networking applications, including:
Industrial Ethernet and factory automation
Ethernet/IP, PROFINET and Modbus TCP systems
Industrial control equipment
Networked measurement and control systems
Broadband gateways and firewall/VPN equipment
Wireless LAN access points and gateways
VoIP equipment
IPTV and set-top boxes
Standalone 10/100 Ethernet switches
Embedded networking equipment
Microchip specifically lists industrial Ethernet, industrial control, broadband gateway, wireless LAN gateway, and networked measurement/control systems among the target applications.
Package Information of KSZ8794CNXIC
The KSZ8794CNXIC uses a 64-pin QFN package, with an 8 × 8 mm package footprint. The datasheet provides the complete pin assignment and package outline for PCB design and layout verification.
What Is the Difference Between KSZ8794CNXIC and KSZ8794CNXCC?
Both belong to the KSZ8794CNX family and use a configurable interface with a 64-pin QFN package. The key difference is the temperature grade: KSZ8794CNXCC is the commercial-temperature version rated from 0°C to +70°C, while KSZ8794CNXIC is the industrial-temperature version rated from -40°C to +85°C.
For industrial equipment or environments with wider temperature variation, procurement teams should verify that the selected temperature grade matches the system specification.
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