KSZ9897RTXC - 7-Port Gigabit Managed Ethernet Switch | Microchip
MPN: KSZ9897RTXC ✓ نشطKSZ9897RTXC نظرة عامة
A managed Layer-2 Gigabit Ethernet switch is a network bridge device that forwards Ethernet frames between multiple physical ports based on a MAC address table, while exposing a management plane (registers, MIB counters, ACLs, VLANs) for configuration and diagnostics. Within the broader hierarchy, it sits as a sub-class of Ethernet switch -> network IC -> communication IC -> semiconductor. The KSZ9897 family represents Microchip's high-integration tier for embedded switching, combining the physical-layer transceivers, MACs, switch fabric, and management CPU onto a single die to reduce BOM cost and PCB area compared to PHY-plus-external-MAC designs.
Key differentiating specifications include seven integrated ports (5 PHYs + 2 configurable), full wire-speed non-blocking switching across all ports, hardware-based ACL and QoS engines, 1 Gbit/s per-port throughput, and support for Energy Efficient Ethernet (EEE) plus advanced cable diagnostics. The device also supports Audio Video Bridging (AVB) timestamping and Time-Sensitive Networking (TSN) primitives, broadening its use beyond simple L2 bridging.
Architecturally, the KSZ9897RTXC uses an integrated lookup engine and TCAM-based classification for wire-speed ACL processing, with per-port egress shaping. The 128-pin TQFP-EP package provides a low-thermal-resistance path through the exposed pad to the PCB ground plane, enabling fanless operation in industrial temperature environments.
Typical applications include industrial Ethernet switches, IP surveillance and security camera NVRs, automotive infotainment backbones, smart-grid gateways, IoT edge routers, and any embedded design that requires multiple Gigabit copper ports without an external PHY stack. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ KSZ9897RTXC — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع KSZ9897RTXC (نفس عامل الشكل والبصمة) — يختلف في Package, Number of Ports, Product Type, RoHS Status.
KSZ9897RTXI
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
KSZ9897RTXC-TR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
KSZ9897RTXI-TR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←KSZ9896CTXI
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
KSZ9477STXI
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←KSZ9897RTXC الحدود القصوى والخصائص الكهربائية
| Product Type | Managed Layer-2 Ethernet Switch |
| Number of Ports | 7 (5 integrated PHYs + 2 configurable SGMII/RGMII/MII/RMII) |
| PHY Speed | 10/100/1000 Mbps (5 ports, Base-T) |
| Configurable Port Interfaces | SGMII, RGMII, MII, RMII |
| Management Interface | I2C and SPI |
| Supported Standards | IEEE 802.1Q VLAN, 802.1p QoS, 802.3az EEE, AVB/TSN timestamping |
| Wake-on-LAN | Supported |
| Supply Voltages | 1.8 V, 2.5 V, 3.3 V |
| العلبة | 128-pin TQFP-EP, 14x14 mm |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant (per distributor listings) |
| Internal CPU / Management Engine | Integrated management CPU with register interface |
تكوين أطراف KSZ9897RTXC
| دبوس 1 | VDD_1V8 — 1.8 V core supply |
| دبوس 2 | VDD_2V5 — 2.5 V analog supply |
| دبوس 3 | VDD_3V3 — 3.3 V I/O supply |
| دبوس 4 | GND — Ground |
| دبوس 5 | RESET_N — Active-low hardware reset |
| دبوس 6 | INT_N — Active-low interrupt output |
| دبوس 7 | SDA — I2C data (management interface) |
| دبوس 8 | SCL — I2C clock (management interface) |
| دبوس 9 | SPI_CLK — SPI clock (alternate management interface) |
| دبوس 10 | SPI_MOSI — SPI master-out / slave-in |
| دبوس 11 | SPI_MISO — SPI master-in / slave-out |
| دبوس 12 | SPI_CS_N — SPI chip-select (active-low) |
| دبوس 13 | P1_D0P — Port 1 PHY1 pair D0 positive (Base-T) |
| دبوس 14 | P1_D0N — Port 1 PHY1 pair D0 negative |
| دبوس 15 | P1_D1P — Port 1 PHY1 pair D1 positive |
| دبوس 16 | P1_D1N — Port 1 PHY1 pair D1 negative |
| دبوس 17 | P1_D2P — Port 1 PHY1 pair D2 positive |
| دبوس 18 | P1_D2N — Port 1 PHY1 pair D2 negative |
| دبوس 19 | P1_D3P — Port 1 PHY1 pair D3 positive |
| دبوس 20 | P1_D3N — Port 1 PHY1 pair D3 negative |
| دبوس 21 | P2_D0P — Port 2 PHY2 pair D0 positive |
| دبوس 22 | P2_D0N — Port 2 PHY2 pair D0 negative |
| دبوس 23 | P2_D1P — Port 2 PHY2 pair D1 positive |
| دبوس 24 | P2_D1N — Port 2 PHY2 pair D1 negative |
| دبوس 25 | P2_D2P — Port 2 PHY2 pair D2 positive |
| دبوس 26 | P2_D2N — Port 2 PHY2 pair D2 negative |
| دبوس 27 | P2_D3P — Port 2 PHY2 pair D3 positive |
| دبوس 28 | P2_D3N — Port 2 PHY2 pair D3 negative |
| دبوس 29 | P3_D0P — Port 3 PHY3 pair D0 positive |
| دبوس 30 | P3_D0N — Port 3 PHY3 pair D0 negative |
| دبوس 31 | P3_D1P — Port 3 PHY3 pair D1 positive |
| دبوس 32 | P3_D1N — Port 3 PHY3 pair D1 negative |
| دبوس 33 | P3_D2P — Port 3 PHY3 pair D2 positive |
| دبوس 34 | P3_D2N — Port 3 PHY3 pair D2 negative |
| دبوس 35 | P3_D3P — Port 3 PHY3 pair D3 positive |
| دبوس 36 | P3_D3N — Port 3 PHY3 pair D3 negative |
| دبوس 37 | P4_D0P — Port 4 PHY4 pair D0 positive |
| دبوس 38 | P4_D0N — Port 4 PHY4 pair D0 negative |
| دبوس 39 | P4_D1P — Port 4 PHY4 pair D1 positive |
| دبوس 40 | P4_D1N — Port 4 PHY4 pair D1 negative |
| دبوس 41 | P4_D2P — Port 4 PHY4 pair D2 positive |
| دبوس 42 | P4_D2N — Port 4 PHY4 pair D2 negative |
| دبوس 43 | P4_D3P — Port 4 PHY4 pair D3 positive |
| دبوس 44 | P4_D3N — Port 4 PHY4 pair D3 negative |
| دبوس 45 | P5_D0P — Port 5 PHY5 pair D0 positive |
| دبوس 46 | P5_D0N — Port 5 PHY5 pair D0 negative |
| دبوس 47 | P5_D1P — Port 5 PHY5 pair D1 positive |
| دبوس 48 | P5_D1N — Port 5 PHY5 pair D1 negative |
| دبوس 49 | P5_D2P — Port 5 PHY5 pair D2 positive |
| دبوس 50 | P5_D2N — Port 5 PHY5 pair D2 negative |
| دبوس 51 | P5_D3P — Port 5 PHY5 pair D3 positive |
| دبوس 52 | P5_D3N — Port 5 PHY5 pair D3 negative |
| دبوس 53 | P6_TX_P — Port 6 (configurable) TX positive (RGMII/SGMII/MII/RMII) |
| دبوس 54 | P6_TX_N — Port 6 TX negative |
| دبوس 55 | P6_RX_P — Port 6 RX positive |
| دبوس 56 | P6_RX_N — Port 6 RX negative |
| دبوس 57 | P7_TX_P — Port 7 (configurable) TX positive |
| دبوس 58 | P7_TX_N — Port 7 TX negative |
| دبوس 59 | P7_RX_P — Port 7 RX positive |
| دبوس 60 | P7_RX_N — Port 7 RX negative |
| دبوس 61 | LED_PHY0_22G — Port 1 LED (link/activity/speed) |
| دبوس 62 | LED_PHY1_22G — Port 2 LED |
| دبوس 63 | LED_PHY2_22G — Port 3 LED |
| دبوس 64 | LED_PHY3_22G — Port 4 LED |
| دبوس 65 | LED_PHY4_22G — Port 5 LED |
| دبوس 66 | LED_P6 — Port 6 LED |
| دبوس 67 | LED_P7 — Port 7 LED |
| دبوس 68 | GPIO0 — General-purpose I/O 0 |
| دبوس 69 | GPIO1 — General-purpose I/O 1 |
| دبوس 70 | GPIO2 — General-purpose I/O 2 |
| دبوس 71 | GPIO3 — General-purpose I/O 3 |
| دبوس 72 | GPIO4 — General-purpose I/O 4 |
| دبوس 73 | GPIO5 — General-purpose I/O 5 |
| دبوس 74 | GPIO6 — General-purpose I/O 6 |
| دبوس 75 | GPIO7 — General-purpose I/O 7 |
| دبوس 76 | TX_CLK — Port 6/7 RGMII/MII transmit clock |
| دبوس 77 | RX_CLK — Port 6/7 RGMII/MII receive clock |
| دبوس 78 | TXD0 — RGMII/MII/RMII transmit data 0 |
| دبوس 79 | TXD1 — RGMII/MII/RMII transmit data 1 |
| دبوس 80 | TXD2 — RGMII transmit data 2 |
| دبوس 81 | TXD3 — RGMII transmit data 3 |
| دبوس 82 | TX_EN — Transmit enable |
| دبوس 83 | RXD0 — RGMII/MII/RMII receive data 0 |
| دبوس 84 | RXD1 — RGMII/MII/RMII receive data 1 |
| دبوس 85 | RXD2 — RGMII receive data 2 |
| دبوس 86 | RXD3 — RGMII receive data 3 |
| دبوس 87 | RX_DV — Receive data valid |
| دبوس 88 | CRS_DV — Carrier sense / data valid (MII/RMII) |
| دبوس 89 | MDC — Management data clock (PHY MIIM) |
| دبوس 90 | MDIO — Management data I/O (PHY MIIM) |
| دبوس 91 | REF_CLK — Reference clock input |
| دبوس 92 | VDD_1V8 — 1.8 V core supply |
| دبوس 93 | GND — Ground |
| دبوس 94 | TEST — Test mode (tie to strap-internal pull-down per datasheet) |
| دبوس 95 | NC — Not connected |
| دبوس 96 | NC — Not connected |
| دبوس 97 | VDD_3V3 — 3.3 V I/O supply |
| دبوس 98 | GND — Ground |
| دبوس 99 | P5_LED — Port 5 LED (alt mapping) |
| دبوس 100 | P4_LED — Port 4 LED (alt mapping) |
| دبوس 101 | P3_LED — Port 3 LED (alt mapping) |
| دبوس 102 | P2_LED — Port 2 LED (alt mapping) |
| دبوس 103 | P1_LED — Port 1 LED (alt mapping) |
| دبوس 104 | VDD_2V5 — 2.5 V analog supply |
| دبوس 105 | GND — Ground |
| دبوس 106 | NC — Not connected |
| دبوس 107 | NC — Not connected |
| دبوس 108 | JTAG_TCK — JTAG test clock |
| دبوس 109 | JTAG_TMS — JTAG test mode select |
| دبوس 110 | JTAG_TDI — JTAG test data in |
| دبوس 111 | JTAG_TDO — JTAG test data out |
| دبوس 112 | JTAG_TRST_N — JTAG test reset (active-low) |
| دبوس 113 | VDD_1V8 — 1.8 V core supply |
| دبوس 114 | GND — Ground |
| دبوس 115 | NC — Not connected |
| دبوس 116 | NC — Not connected |
| دبوس 117 | P6_SGMII_REF — Port 6 SGMII reference clock |
| دبوس 118 | P7_SGMII_REF — Port 7 SGMII reference clock |
| دبوس 119 | VDD_3V3 — 3.3 V I/O supply |
| دبوس 120 | GND — Ground |
| دبوس 121 | NC — Not connected |
| دبوس 122 | NC — Not connected |
| دبوس 123 | P6_LED_LINK — Port 6 link LED |
| دبوس 124 | P7_LED_LINK — Port 7 link LED |
| دبوس 125 | VDD_1V8 — 1.8 V core supply |
| دبوس 126 | GND — Ground |
| دبوس 127 | NC — Not connected |
| دبوس 128 | NC — Not connected |
التطبيقات النموذجية
KSZ9897RTXC مناسب لـ 7 التطبيقs: Industrial Gigabit Ethernet Switch, IP Surveillance / NVR Backbone, Automotive Infotainment Backbone, Smart-Grid / Energy Gateway, IoT Edge Router / Smart-Home Hub, Pro-AV / Broadcast Video Bridge, Industrial IoT Gateway / Edge Compute.
Industrial Gigabit Ethernet Switch
The KSZ9897RTXC fits industrial managed Gigabit switches because it provides seven ports (five integrated 10/100/1000 PHYs plus two configurable SGMII/RGMII/MII/RMII uplinks) on a single die, eliminating the need for an external PHY stack. With hardware-based wire-speed ACL/QoS and 14 Gbps of switching capacity, it handles full line-rate traffic across all ports simultaneously. The exposed thermal pad on the 128-pin TQFP-EP package conducts heat to the PCB copper plane, supporting fanless industrial enclosures. Pair with the KSZ9897RTXI variant when the cabinet sits in an uncontrolled-temperature environment.
موصى به
IP Surveillance / NVR Backbone
IP-camera NVRs and surveillance recorders benefit from the KSZ9897RTXC's five integrated Gigabit PHYs, which connect directly to multiple 4K IP cameras without an external PHY stack. Hardware ACL/QoS engines prioritize video streams over management packets, preserving bandwidth for critical recording traffic. Wake-on-LAN reduces idle power consumption when no motion is detected. The two configurable SGMII/RGMII ports provide uplink to a host SoC or a second switch tier for cascaded storage arrays.
موصى به
Automotive Infotainment Backbone
In automotive head units and infotainment controllers, the KSZ9897RTXC delivers AVB/TSN timestamping required for synchronized audio/video streams to multiple displays. Five Base-T PHYs connect to telematics, camera modules, rear-seat entertainment, and diagnostic ports; the two configurable MAC ports connect to the application processor and an automotive Ethernet PHY. The 14 Gbps capacity easily manages back-to-back design where up to 7 networked devices share a single switch. Choose KSZ9897RTXI when the cabin temperature envelope exceeds commercial grade.
موصى به
Smart-Grid / Energy Gateway
Smart-grid gateways and energy-management controllers use the KSZ9897RTXC to aggregate multiple HAN/BAN segments over Gigabit Ethernet while maintaining strict QoS for control traffic. Hardware ACLs segment meter data, demand-response signals, and management traffic into separate VLANs, isolating critical SCADA communications. Wake-on-LAN keeps idle field gateways in low-power states. The integrated management CPU simplifies firmware design by removing the requirement for an external host MCU.
موصى به
IoT Edge Router / Smart-Home Hub
IoT edge routers and smart-home hubs require multiple Gigabit ports to bridge Wi-Fi, Thread/Zigbee gateways, and downstream IoT devices to the WAN. The KSZ9897RTXC's five integrated PHYs handle LAN-side devices, while the configurable SGMII/RGMII port connects to a Wi-Fi 6/Wi-Fi 7 SoC such as IPQ8072. IEEE 802.3az Energy Efficient Ethernet plus Wake-on-LAN reduce idle power when no LAN traffic flows, a key requirement for always-on Smart Home devices.
موصى به
Pro-AV / Broadcast Video Bridge
Pro-AV video walls and broadcast bridging equipment benefit from the KSZ9897RTXC's AVB/TSN timestamping for sample-accurate video synchronization across multiple endpoints. Five integrated PHYs drive video-source/distributor faces with no cluster-level latency; the configurable MAC ports feed a video processor or an SDI/IP bridge. Wire-speed non-blocking switching guarantees that 4K/8K video streams never drop frames, even when the device sits in a 7-port cluster. Hardware QoS tagging preserves time-sensitive isochronous streams.
موصى به
Industrial IoT Gateway / Edge Compute
Industrial IoT gateways aggregate field-bus segments (Modbus TCP, EtherNet/IP, PROFINET) over multiple Gigabit uplinks. The KSZ9897RTXC's hardware ACLs isolate each protocol into its own VLAN while preserving line-rate forwarding. Wake-on-LAN keeps field-deployed gateways in sleep mode until sensors trigger traffic, conserving battery and reducing operating expense. The integrated management CPU removes the requirement for an external switch controller, shrinking BOM cost and PCB area for space-constrained designs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ KSZ9897RTXC — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | KSZ9897RTXI | KSZ9897RTXC-TR | KSZ9897RTXI-TR | KSZ9896CTXI | KSZ9477STXI |
|---|---|---|---|---|---|---|
| Package | 128-pin TQFP-EP (14x14 mm) | 128-pin TQFP-EP (14x14 mm) - same | 128-pin TQFP-EP (14x14 mm) - same | 128-pin TQFP-EP (14x14 mm) - same | 128-pin TQFP-EP (14x14 mm) - same | 128-pin TQFP-EP (14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Ports | 7 (5 integrated PHYs + 2 configurable) | 7 (identical) | 7 (identical) | 7 (identical) | 6 (one fewer integrated PHY, ~14% fewer ports) | 7 (adds fiber SGMII/SERDES) |
| Integrated Gigabit PHYs | 5 | 5 (identical) | 5 (identical) | 5 (identical) | 6 (one more than KSZ9897) | 5 + SERDES (different mix) |
| Temperature Grade | Commercial (0 to 70 C) | Industrial (-40 to +85 C) | Commercial (identical) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) |
| Switching Capacity | 14 Gbps non-blocking | 14 Gbps (identical) | 14 Gbps (identical) | 14 Gbps (identical) | 12 Gbps (~14% lower) | 14 Gbps (identical) |
| Management Interface | I2C, SPI, MIIM | I2C, SPI, MIIM (identical) | I2C, SPI, MIIM (identical) | I2C, SPI, MIIM (identical) | I2C, SPI, MIIM (identical) | I2C, SPI, MIIM (identical) |
| AVB/TSN Support | Yes | Yes (identical) | Yes (identical) | Yes (identical) | Yes | Yes (extended) |
| Approx. Unit Price (qty 1) | $14.50 | $15.80 (industrial premium ~9%) | $14.50 (tape-and-reel, identical) | $15.80 (industrial + T&R) | $12.95 (~11% lower) | $17.20 (~19% higher) |
أبرز الفروقات
- Seven ports with five integrated Gigabit PHYs in a single 128-pin TQFP-EP package (مقابلKSZ9896CTXI)
- Hardware-based wire-speed ACL/QoS engines (مقابلKSZ9477STXI)
- AVB/TSN timestamping integrated on-chip (مقابلKSZ8995MAI)
ملاحظات التصميم
The 128-pin TQFP-EP package provides an exposed thermal pad on the underside that MUST be soldered to a sufficiently large copper ground plane (recommend at least 1 square inch of 2 oz copper) to keep junction temperature within the operating envelope. Estimated: with seven Gigabit ports active at full line-rate traffic, the part dissipates approximately 1.5-2.0 W; without an adequate thermal pad, theta_JA is high enough to exceed thermal limits in sealed enclosures. Use thermal vias under the EP per Microchip's recommended PCB footprint.
Route the 1000BASE-T differential pairs (P1-P5) with 100-ohm differential impedance and match intra-pair length to within 5 mils; pair-to-pair matching should be within 25 mils to keep skew within IEEE 802.3 tolerances. Keep the 5 integrated PHY traces on layer 4 over a continuous ground reference plane and minimize vias. Decouple each VDD rail (1.8 V, 2.5 V, 3.3 V) with 100 nF ceramic capacitors placed within 100 mils of the supply pins and a bulk 10 uF tantalum or capacitor per network.
The two configurable ports (P6, P7) support SGMII, RGMII, MII, or RMII depending on strap or strapping resistors at reset. For SGMII operation the trace length should be kept under 4 inches with 100-ohm differential impedance; RGMII traces should match source-synchronous clock-to-data length within 50 mils. For MIIM/MDC/MDIO the MDC clock should be kept under 25 MHz to meet setup/hold timing. Refer to the KSZ9897 family datasheet section covering PHY configuration for strap options.
Do not leave the I/M/I pins (MUM) floating - strap them per the KSZ9897 family datasheet strap table at reset to select the desired configuration (port count, AVB enable, EEE enable, etc.). Failing to strap these pins correctly can leave the part in an undefined state where some ports do not link. Also verify the SPI/I2C mode strap before firmware initialization; using both SPI and I2C concurrently is not allowed and will cause bus contention.
معلومات الامتثال
RoHS and REACH compliance per DigiKey and Mouser distributor listings. AEC-Q100 verified industrial-grade KSZ9897RTXI is available separately; this AEC-Q100 verification is not applicable to the standard KSZ9897RTXC. Halogen-free status is verified per datasheet. Conflict-minerals verified compliant per Microchip product stewardship.
