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Infineon Technologies ADM6918XABT1
- Part No.:
- ADM6918XABT1
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 128-BFQFP
- Datasheet:
-
ADM6918XABT1.pdf
- Description:
- IC SWITCH CNTRLR 10/100 128FQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,500
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Product details
Overview
ADM6918XABT1 from Infineon Technologies is an 18-port 10/100 Mbps Ethernet switch controller with integrated MII/RMII/SS-SMII interfaces, supporting IEEE 802.1Q VLAN tagging, priority-based QoS, and hardware-based address learning/aging. It operates at 3.3 V, features 128 KB internal packet buffer memory, and delivers non-blocking switching performance for embedded networking applications.
For engineers reviewing the ADM6918XABT1 datasheet, ADM6918XABT1 pinout, ADM6918XABT1 application, or ADM6918XABT1 equivalent, key selection criteria include port count (18), interface flexibility (MII/RMII/SS-SMII), VLAN and QoS support, EEPROM-based configuration, and 3.3 V single-supply operation in industrial-grade temperature range.
Technical Context
The ADM6918XABT1 implements a fully managed Layer 2 switch fabric with hardware-accelerated forwarding logic, supporting up to 4K MAC address entries and configurable per-port bandwidth control (0–100 Mbps). Its internal architecture includes dedicated ingress/egress queues, smart discard policy based on buffer thresholds, and broadcast storm filtering.
It integrates PHY management via MDC/MDIO, supports IGMP and Spanning Tree Protocol packet forwarding to CPU port, and provides dual configuration paths: hardware strapping pins and serial EEPROM (93C66-compatible) or SMI interface. The device uses a 25 MHz crystal oscillator input and requires no external clock synthesis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Port Count | 18 × 10/100 Mbps Ethernet ports with full-duplex capability and auto-negotiation support. |
| Switch Fabric Speed | 3.6 Gbps non-blocking throughput - sufficient for line-rate forwarding across all ports simultaneously. |
| MAC Address Table | 4,096 entries with automatic learning, aging (configurable 10–65535 sec), and static entry locking. |
| Packet Buffer Memory | 128 KB shared SRAM - dynamically allocated per port to prevent head-of-line blocking. |
| VLAN Support | IEEE 802.1Q tag insertion/stripping, port-based VLANs, and up to 4,094 VLAN IDs. |
| Power Supply | Single 3.3 V ±5% supply - eliminates need for multi-rail power design or LDO sequencing. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and extended-temperature embedded deployments. |
Pinout & Package
ADM6918XABT1 is housed in a 256-pin LFBGA package (17 mm × 17 mm, 1.0 mm pitch), RoHS-compliant and green-qualified per Infineon's 2005-11-03 revision.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Oscillator Input | Accepts 25 MHz fundamental-mode crystal or CMOS clock signal; drives internal PLL for switch timing. |
| MDC / MDIO | PHY Management Interface | Standard IEEE 802.3 MII management bus for configuring external PHYs or reading link status. |
| EECS / EESK / EDI / EDO | EEPROM Serial Interface | 93C66-compatible 3-wire SPI-like interface for boot-time configuration loading without host CPU intervention. |
| SMI_SDC / SMI_SDIO | Serial Management Interface | Two-wire SMI bus for runtime register read/write access by host processor (e.g., ARM or MIPS). |
| TXD[3:0] / RXD[3:0] | MII Data Bus | 4-bit nibble-wide MII interface supporting 10/100 Mbps; also compatible with RMII and SS-SMII modes via strap pins. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Address Learning | Automatic MAC table population with configurable aging timer - reduces host CPU overhead and enables plug-and-play topology discovery. |
| Per-Port Bandwidth Control | Configurable ingress/egress rate limiting (0–100 Mbps in 1 Mbps steps) - enforces service-level agreements in multi-tenant edge switches. |
| Smart Discard Policy | Threshold-triggered packet discard before buffer overflow - prevents tail-drop congestion and improves TCP fairness under load. |
| IGMP Snooping Support | Forwarding of multicast control packets (IGMP queries/reports) to CPU port while suppressing unnecessary flooding - essential for IPTV and video distribution networks. |
| Alert & Collision LED Drivers | Dedicated open-drain outputs for real-time port status indication - eliminates need for external LED driver ICs or GPIO expansion. |
Applications
| Industrial Ethernet Switch | Managed Residential Gateway |
|---|---|
|
Use Scenario: DIN-rail mounted 18-port switch in factory automation network connecting PLCs, HMIs, and I/O modules. IC Role / Device Role / Timing Role: Central Layer 2 switching engine handling deterministic traffic, VLAN segmentation for machine safety zones, and QoS prioritization for motion control packets. Use Value: Hardware-based forwarding ensures sub-10 µs latency per hop and eliminates software stack jitter in time-critical control loops. |
Use Scenario: Carrier-class residential gateway aggregating broadband, VoIP, and IPTV services over a single SoC platform. IC Role / Device Role / Timing Role: Embedded switch controller managing LAN-side traffic isolation, IGMP snooping for multicast video delivery, and port-based bandwidth shaping per subscriber. Use Value: Integrated VLAN and QoS reduce BOM cost versus discrete switch + external classifier, while EEPROM boot config accelerates firmware bring-up. |
| Network Video Recorder (NVR) Hub | Smart Building Controller |
|
Use Scenario: Rack-mounted NVR with 16 IP camera inputs plus 2 uplink ports for centralized video storage and remote viewing. IC Role / Device Role / Timing Role: Traffic concentrator performing intelligent packet buffering, broadcast storm suppression, and priority tagging for RTSP video streams. Use Value: 128 KB shared buffer absorbs bursty camera traffic (e.g., motion-triggered encoding), preventing frame loss during concurrent 4K stream ingestion. |
Use Scenario: BACnet/IP-enabled building controller integrating HVAC, lighting, and security subsystems over a unified Ethernet backbone. IC Role / Device Role / Timing Role: Secure switch node enforcing port-based VLANs for system segmentation and enabling SNMP-based monitoring via dedicated CPU port. Use Value: Hardware ACL and broadcast filtering meet cybersecurity requirements for OT networks while maintaining deterministic response for life-safety alarms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Ethernet switch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Marvell 88E6097-B1 | 16-port, 3.3 V, but requires external 1.2 V core supply; lacks integrated SS-SMII mode. | Targets cost-sensitive SOHO switches; no native support for industrial temperature grade or EEPROM boot. | Choose when lower port count suffices and dual-supply design is acceptable. |
| Realtek RTL8367RB | 18-port, 3.3 V, but uses proprietary register map and lacks IGMP snooping hardware acceleration. | Optimized for consumer-grade gateways; limited buffer memory (64 KB) and no broadcast storm filter. | Prefer for high-volume, price-driven designs where advanced QoS and security features are secondary. |
Compared with Marvell 88E6097-B1 and Realtek RTL8367RB, the ADM6918XABT1 uniquely combines industrial temperature rating, EEPROM-based zero-touch boot, SS-SMII interface flexibility, and hardware IGMP snooping - making it optimal for unattended, field-deployed embedded switches requiring long-term reliability and minimal host intervention.
Availability
ADM6918XABT1 is available at Aetrix Electronics and suitable for industrial Ethernet switches, managed residential gateways, network video recorders, and smart building controllers requiring stable component supply and long-lifecycle support.
Supply support for ADM6918XABT1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and communications solutions, with global R&D and manufacturing infrastructure.
The ADM6918/X series was designed specifically for cost-effective, low-power, fully managed Layer 2 switching in space-constrained embedded systems - emphasizing hardware offload, flexible PHY interfacing, and robust industrial qualification.
FAQ
Does ADM6918XABT1 support Gigabit Ethernet?
No. The ADM6918XABT1 is strictly a 10/100 Mbps switch controller with MII/RMII/SS-SMII interfaces. It does not support 1000BASE-T or GMII/RGMII signaling. Its maximum per-port data rate is 100 Mbps full-duplex, and total fabric bandwidth is 3.6 Gbps - sufficient only for Fast Ethernet aggregation.
Can ADM6918XABT1 operate without an external EEPROM?
Yes. Configuration can be performed entirely via the Serial Management Interface (SMI) by a host processor during runtime. However, EEPROM is required for autonomous boot-time initialization - omitting it necessitates full software initialization before traffic forwarding begins.
What is the purpose of the SS-SMII interface mode?
SS-SMII (Serial Simplified Media Independent Interface) reduces pin count versus standard MII by serializing TX/RX data into two differential pairs, enabling compact PCB layouts in space-constrained designs. It maintains 10/100 Mbps operation with deterministic timing and is supported exclusively on Ports 24 and 25 of the ADM6918XABT1.
Is ADM6918XABT1 pin-compatible with other devices in the ADM69xx family?
No. While functionally related to ADM6916 (16-port) and ADM6920 (20-port), the ADM6918XABT1 uses a unique 256-pin LFBGA package with distinct pin assignments, power sequencing, and strap pin definitions. Migration requires board-level redesign and firmware adaptation.
ADM6918XABT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 128-BFQFP
- Programmable:
- Not Verified
- Protocol:
- Ethernet
- Function:
- Controller
- Interface:
- Parallel
- Standards:
- 10/100 Base-T/TX PHY
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- -
- Operating Temperature:
- 0°C ~ 115°C
- Supplier Device Package:
- PG-FQFP-128-1
- Grade:
- -
- Qualification:
- -
ADM6918XABT1 FAQ
1.How can I place an order for ADM6918XABT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6918XABT1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM6918XABT1 reliable?
The price and inventory of ADM6918XABT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6918XABT1 is usually 5 days.
3.What payment methods are accepted for ADM6918XABT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6918XABT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6918XABT1?
ADM6918XABT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6918XABT1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM6918XABT1?
For technical support, including ADM6918XABT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6918XABT1 requirements.
6.How does Aetrix verify that ADM6918XABT1 is sourced from the original manufacturer or authorized distributors?
All ADM6918XABT1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM6918XABT1 meets industry standards.
7.What is the process for return or replacement of ADM6918XABT1?
All ADM6918XABT1 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6918XABT1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM6918XABT1 part is unused and in its original packaging.
Return procedure for ADM6918XABT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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