LAN9220-ABZJ - 10/100 Ethernet Controller w/ PHY | Microchip
Référence : LAN9220-ABZJ ✓ ActifLAN9220-ABZJ Présentation
An Ethernet controller is an interface IC that manages the framing, media access and error handling of an Ethernet link. In the product taxonomy the LAN9220 sits at the network interface controller (NIC) level, above the physical layer (PHY) and below the communications IC and interface IC families. Because the MAC and the PHY are integrated on one die, a host processor only needs to drive a simple parallel bus rather than wiring two separate chips with a narrow interface between them.
Key features include full IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX compliance, HP Auto-MDIX automatic crossover detection, 16 KB of internal packet buffering, and a 16-bit MII interface that runs in both 8-bit and 16-bit modes. Digital and analog rails are supplied separately at 1.8 V and 3.3 V so that a 3.3 V I/O host can be bridged to 1.8 V core logic without level translation. The QFN package exposes a ground pad that must be tied to the ground plane for both heat removal and low-inductance return.
Internally the device is a conventional store-and-forward MAC with a separate 10/100 PCS and analog PHY. HP Auto-MDIX removes the need for a strapping resistor that forces master or slave operation, and the twisted-pair pins swap transmit and receive roles automatically when a reversed connection is detected. The MII interface presents RXD, TXD, TX_EN, RX_DV, RX_ER, COL, CRS and management signals to the host, giving the CPU full visibility of carrier, collision and error status. Microchip documents the recommended land pattern and thermal layout in the LAN9220 datasheet and in application note AN 18.4, Migrating from the LAN9215 to the LAN9220.
Typical applications include industrial control and factory automation gateways, embedded Linux and RTOS network cards, IP cameras and security equipment, set-top boxes, print servers, test instrumentation and PLC serial-to-Ethernet bridges. The parallel MII interface suits hosts with an embedded MII or RMII-capable MAC, while the integrated PHY removes the need for external magnetics, line drivers and a separate PHY chip.
Design attention should be paid to exposed-pad thermal vias and the separation of analog supply pins from digital switching currents. Microchip recommends a 4 x 4 grid of vias at 60 mil spacing in the exposed pad area to connect the pad to the board ground plane, and the datasheet land pattern chapter should be followed exactly rather than approximating the footprint. Decoupling should follow the values listed in the datasheet power supply section, with the 1.8 V and 3.3 V rails each carrying local bulk and high-frequency ceramic capacitance.
This page consolidates the manufacturer product information, distributor listing data, drop-in alternatives and practical layout guidance for the LAN9220-ABZJ into a single engineering reference that goes beyond a distributor catalogue entry, including the migration caveats for designers moving up from the older LAN9215 family.
Alternatives de remplacement direct pour LAN9220-ABZJ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LAN9220-ABZJ (même facteur de forme et même empreinte) — différant par Host Interface, Package, Product Type.
LAN9221I-ABZJ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LAN9220-ABZJ Spécifications
| Product Type | Single-chip 10/100 Ethernet controller with integrated PHY |
| Ethernet Support | 10BASE-T and 100BASE-TX (IEEE 802.3 / 802.3u) |
| Host Interface | 16-bit MII parallel interface (8-bit or 16-bit mode) |
| Tension d'alimentation | 1.8 V and 3.3 V |
| Température de fonctionnement | 0 °C to +70 °C |
| Boîtier | 56-pin QFN with exposed pad (QFN-56-EP, 8 x 8 mm) |
| Type de montage | Surface mount |
| Internal Buffer | 16 KB |
| Auto-MDIX | Yes, HP Auto-MDIX automatic crossover |
| Media Access Control | IEEE 802.3 compliant MAC |
| Physical Layer | Integrated 10/100BASE-TX PHY |
| Maximum Data Rate | 100 Mbps |
| Cabling | Cat 5 / Cat 5e twisted pair, 2 pairs |
| Packing Option | Tray (-ABZJ ordering code) |
| Statut RoHS | Compliant |
| Number of I/O Pins | 56 |
Guide de configuration des broches du LAN9220-ABZJ 56-pin qfn with exposed pad (qfn-56-ep, 8 x 8 mm)
Configuration des broches du LAN9220-ABZJ (boîtier 56-pin qfn with exposed pad (qfn-56-ep, 8 x 8 mm)). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour LAN9220-ABZJ.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LAN9220-ABZJ convient pour 6 applications: Industrial Ethernet Control Gateway, Embedded Linux Network Interface Card, IP Camera and Security Equipment, Set-Top Box and Network Appliance, Instrumentation and Test Equipment, Print Server and Protocol Gateway.
Industrial Ethernet Control Gateway
The LAN9220-ABZJ suits factory automation gateways that must bridge a PLC or embedded controller to a 10/100 network while keeping the board compact. Because the PHY is integrated, only an Ethernet transformer with centre tap, a bias network and bypass capacitors are required on the line side, so the analogue section stays small and the 56-pin QFN needs no separate PHY breakout. The 16-bit MII bus drives an embedded MAC in an application processor or MCU with parallel Ethernet support, and the 1.8 V core rail lets the device sit alongside 1.8 V logic. In a control cabinet the 0 °C to +70 °C commercial grade is adequate only if the enclosure temperature stays inside that window; otherwise move up to the industrial sibling.
Recommandé
Embedded Linux Network Interface Card
Embedded Linux platforms frequently expose a parallel MII port on the SoC, and the LAN9220-ABZJ provides the complete MAC plus PHY pair needed to reach a network with a single chip. The integrated PHY removes the need for a discrete 10/100 transceiver, which cuts board area, reduces the number of high-speed differential nets to a single 1:1 magnetics path and lowers assembly cost. The 16 KB internal buffer smooths bursts between the host processor and the line, and the MII carries carrier, collision and error status back to the driver. Note that the parallel bus consumes host pin count and PCB routing, so for hosts with only an RMII interface an RMII-capable Ethernet transceiver is the better architectural fit.
Recommandé
IP Camera and Security Equipment
Network cameras and access control units typically send compressed video or control traffic over a single 10/100 link, making the LAN9220-ABZJ a natural fit for the network port. The integrated PHY and 16 KB buffer handle bursty frame transmission without forcing the host processor to pace the MII interface, and HP Auto-MDIX allows the same board to work with both straight-through and crossover patch cables in installers' environments. The 56-pin QFN with an 8 x 8 mm exposed pad is compact enough for space-constrained enclosures, provided the recommended 4 x 4 via grid is implemented for thermal and inductive return reasons. For designs that must run below 0 °C outdoors, specify the industrial temperature variant instead of the commercial -ABZJ code.
Recommandé
Set-Top Box and Network Appliance
Set-top boxes, thin clients and home gateway appliances typically expose a 10/100BASE-T port alongside other interfaces, and the LAN9220-ABZJ provides MAC, PHY and MII host interface in one device. Integrating the PHY keeps the analogue line path to the transformer and bias network only, which simplifies EMC layout because the high-speed digital MII bus stays on the opposite side of the board. The separate 1.8 V and 3.3 V supplies let the core run at 1.8 V for lower power while the MII pins are driven at 3.3 V to match a 3.3 V host. The internal 16 KB buffer absorbs packet bursts during streaming, and the 0 °C to +70 °C commercial grade suits indoor consumer and prosumer enclosures.
Recommandé
Instrumentation and Test Equipment
Laboratory instruments and portable test gear often need a network port that is simple to bring up and quiet enough not to disturb sensitive measurements. The LAN9220-ABZJ integrates the PHY directly on the die, so there is no separate transceiver whose clock or reference noise could couple into analogue measurement paths, and the MII interface can be clocked from a clean system oscillator with defined timing. Because the part is a fixed-function MAC rather than a software protocol stack, bring-up is driven by the host's standard Ethernet driver rather than by custom firmware. The exposed ground pad keeps the high-speed return path short, which matters in tightly packed instrument front ends. Confirm that the enclosure internal temperature remains within 0 °C to +70 °C.
Recommandé
Print Server and Protocol Gateway
Print servers, serial-to-Ethernet bridges and legacy protocol gateways are classic embedded networking products that need a reliable 10/100 port with minimal design effort. The LAN9220-ABZJ's integrated PHY means the gateway needs no separate transceiver, no external clock recovery and no MDIX strapping, so the board can be laid out as two clear domains - a digital MII side and an isolated analogue line side protected by the 1:1 transformer. The 16 KB packet buffer helps when a legacy serial device bursts data into the network, and the commercial temperature grade is appropriate for indoor office equipment. Note that the 56-pin QFN exposed pad requires the manufacturer's 4 x 4 via grid so that return current from the MII bus does not share a path with the line-side return.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LAN9220-ABZJ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LAN9221I-ABZJ |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 56-pin QFN with exposed pad (8 x 8 mm) | 56-pin QFN with exposed pad (8 x 8 mm) - same |
| Device Type | 10/100 Ethernet controller with integrated PHY | 10/100 Ethernet controller with integrated PHY |
| Host Interface | 16-bit MII parallel | 16-bit MII parallel |
| Ethernet Support | 10BASE-T / 100BASE-TX (IEEE 802.3, 802.3u) | 10BASE-T / 100BASE-TX |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V |
| Operating Temperature | 0 °C to +70 °C | Industrial grade, extended temperature range |
| Auto-MDIX | Yes, HP Auto-MDIX | Yes |
Principaux différenciateurs
- MAC and PHY integrated on one die, eliminating a separate transceiver (vs KSZ8041RNL)
- 16-bit MII host interface gives full link-status visibility (vs LAN8742-CZ-TR)
- Commercial-grade temperature suited to indoor equipment (vs LAN9221I-ABZJ)
- HP Auto-MDIX removes board-level crossover strapping (vs TJA1057GTKZ)
Notes de conception
The exposed pad on the 56-pin QFN is a ground connection, not only a heat sink. Microchip application note AN 18.4 recommends a 4 x 4 grid of vias at 60 mil spacing inside the exposed pad area to tie the pad to the board ground plane, and states that the recommended land pattern is given in the PCB layout chapter of the LAN9220 data sheet. Do not approximate this footprint with a generic 56-pin QFN land pattern - pin pitch, pad length and via pattern all affect EMC and thermal performance.
The device uses separate 1.8 V and 3.3 V rails. Follow the datasheet power supply connection diagram for the decoupling network on each rail, including the required bulk electrolytic or ceramic near the supply pins and the high-frequency ceramic bypass. Keep the analogue 1.8 V rail filtering separate from the switching return current of the digital MII bus, and route the exposed-pad vias directly to a quiet ground region so MII edge currents do not share a path with the twisted-pair return.
The line side is the main EMI risk. Use the specified 1:1 Ethernet transformer with centre tap and the recommended bias resistor network, place the line-side bypass capacitors close to the transformer pins, and observe the keep-out between the twisted pair pins and the digital MII traces. HP Auto-MDIX removes the MDIX strapping resistor requirement but does not reduce the need for a controlled return path on the pair; differential routing from the PHY to the magnetics should be kept short and symmetric.
The most frequent integration errors are assuming the LAN9220 is a pin-compatible replacement for the LAN9215 (it is not - a new PCB is required per AN 18.4), omitting the exposed-pad via grid, and wiring the MII bus with a shared ground return under the device. Another common mistake is ordering the commercial -ABZJ code for an enclosure that can drop below 0 °C or exceed 70 °C. Verify the suffix against the manufacturer product page and confirm the recommended PCB land pattern before layout release.
Informations de conformité
RoHS and REACH compliance are recorded on distributor part attribute listings for the LAN9220-ABZJ. The commercial -ABZJ ordering code is not AEC-Q100 qualified. Lead-free, halogen-free and conflict-minerals declarations are not stated on the part listings and should be confirmed with the manufacturer before use in regulated programs.
