KSZ9897RTXC - 7-Port Gigabit Managed Ethernet Switch | Microchip
N.º de pieza: KSZ9897RTXC ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.1 | $131,00 |
| 100 | $11.62 | $1.162,00 |
| 500 | $10.2 | $5.100,00 |
| 1.000 | $9.05 | $9.050,00 |
KSZ9897RTXC Descripción general
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.
Alternativas directas para KSZ9897RTXC — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con KSZ9897RTXC (mismo factor de forma y huella) — difiere en Number of Ports, Package, Product Type, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
KSZ9897RTXI
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KSZ9897RTXC-TR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KSZ9897RTXI-TR
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$9.2 / unidad
Ver hoja de datos →KSZ9896CTXI
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KSZ9477STXI
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
KSZ9897RTXC Valores máximos y características eléctricas
| 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 |
| Encapsulado | 128-pin TQFP-EP, 14x14 mm |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (per distributor listings) |
| Internal CPU / Management Engine | Integrated management CPU with register interface |
Configuración de pines de KSZ9897RTXC
| Pin 1 | VDD_1V8 — 1.8 V core supply |
| Pin 2 | VDD_2V5 — 2.5 V analog supply |
| Pin 3 | VDD_3V3 — 3.3 V I/O supply |
| Pin 4 | GND — Ground |
| Pin 5 | RESET_N — Active-low hardware reset |
| Pin 6 | INT_N — Active-low interrupt output |
| Pin 7 | SDA — I2C data (management interface) |
| Pin 8 | SCL — I2C clock (management interface) |
| Pin 9 | SPI_CLK — SPI clock (alternate management interface) |
| Pin 10 | SPI_MOSI — SPI master-out / slave-in |
| Pin 11 | SPI_MISO — SPI master-in / slave-out |
| Pin 12 | SPI_CS_N — SPI chip-select (active-low) |
| Pin 13 | P1_D0P — Port 1 PHY1 pair D0 positive (Base-T) |
| Pin 14 | P1_D0N — Port 1 PHY1 pair D0 negative |
| Pin 15 | P1_D1P — Port 1 PHY1 pair D1 positive |
| Pin 16 | P1_D1N — Port 1 PHY1 pair D1 negative |
| Pin 17 | P1_D2P — Port 1 PHY1 pair D2 positive |
| Pin 18 | P1_D2N — Port 1 PHY1 pair D2 negative |
| Pin 19 | P1_D3P — Port 1 PHY1 pair D3 positive |
| Pin 20 | P1_D3N — Port 1 PHY1 pair D3 negative |
| Pin 21 | P2_D0P — Port 2 PHY2 pair D0 positive |
| Pin 22 | P2_D0N — Port 2 PHY2 pair D0 negative |
| Pin 23 | P2_D1P — Port 2 PHY2 pair D1 positive |
| Pin 24 | P2_D1N — Port 2 PHY2 pair D1 negative |
| Pin 25 | P2_D2P — Port 2 PHY2 pair D2 positive |
| Pin 26 | P2_D2N — Port 2 PHY2 pair D2 negative |
| Pin 27 | P2_D3P — Port 2 PHY2 pair D3 positive |
| Pin 28 | P2_D3N — Port 2 PHY2 pair D3 negative |
| Pin 29 | P3_D0P — Port 3 PHY3 pair D0 positive |
| Pin 30 | P3_D0N — Port 3 PHY3 pair D0 negative |
| Pin 31 | P3_D1P — Port 3 PHY3 pair D1 positive |
| Pin 32 | P3_D1N — Port 3 PHY3 pair D1 negative |
| Pin 33 | P3_D2P — Port 3 PHY3 pair D2 positive |
| Pin 34 | P3_D2N — Port 3 PHY3 pair D2 negative |
| Pin 35 | P3_D3P — Port 3 PHY3 pair D3 positive |
| Pin 36 | P3_D3N — Port 3 PHY3 pair D3 negative |
| Pin 37 | P4_D0P — Port 4 PHY4 pair D0 positive |
| Pin 38 | P4_D0N — Port 4 PHY4 pair D0 negative |
| Pin 39 | P4_D1P — Port 4 PHY4 pair D1 positive |
| Pin 40 | P4_D1N — Port 4 PHY4 pair D1 negative |
| Pin 41 | P4_D2P — Port 4 PHY4 pair D2 positive |
| Pin 42 | P4_D2N — Port 4 PHY4 pair D2 negative |
| Pin 43 | P4_D3P — Port 4 PHY4 pair D3 positive |
| Pin 44 | P4_D3N — Port 4 PHY4 pair D3 negative |
| Pin 45 | P5_D0P — Port 5 PHY5 pair D0 positive |
| Pin 46 | P5_D0N — Port 5 PHY5 pair D0 negative |
| Pin 47 | P5_D1P — Port 5 PHY5 pair D1 positive |
| Pin 48 | P5_D1N — Port 5 PHY5 pair D1 negative |
| Pin 49 | P5_D2P — Port 5 PHY5 pair D2 positive |
| Pin 50 | P5_D2N — Port 5 PHY5 pair D2 negative |
| Pin 51 | P5_D3P — Port 5 PHY5 pair D3 positive |
| Pin 52 | P5_D3N — Port 5 PHY5 pair D3 negative |
| Pin 53 | P6_TX_P — Port 6 (configurable) TX positive (RGMII/SGMII/MII/RMII) |
| Pin 54 | P6_TX_N — Port 6 TX negative |
| Pin 55 | P6_RX_P — Port 6 RX positive |
| Pin 56 | P6_RX_N — Port 6 RX negative |
| Pin 57 | P7_TX_P — Port 7 (configurable) TX positive |
| Pin 58 | P7_TX_N — Port 7 TX negative |
| Pin 59 | P7_RX_P — Port 7 RX positive |
| Pin 60 | P7_RX_N — Port 7 RX negative |
| Pin 61 | LED_PHY0_22G — Port 1 LED (link/activity/speed) |
| Pin 62 | LED_PHY1_22G — Port 2 LED |
| Pin 63 | LED_PHY2_22G — Port 3 LED |
| Pin 64 | LED_PHY3_22G — Port 4 LED |
| Pin 65 | LED_PHY4_22G — Port 5 LED |
| Pin 66 | LED_P6 — Port 6 LED |
| Pin 67 | LED_P7 — Port 7 LED |
| Pin 68 | GPIO0 — General-purpose I/O 0 |
| Pin 69 | GPIO1 — General-purpose I/O 1 |
| Pin 70 | GPIO2 — General-purpose I/O 2 |
| Pin 71 | GPIO3 — General-purpose I/O 3 |
| Pin 72 | GPIO4 — General-purpose I/O 4 |
| Pin 73 | GPIO5 — General-purpose I/O 5 |
| Pin 74 | GPIO6 — General-purpose I/O 6 |
| Pin 75 | GPIO7 — General-purpose I/O 7 |
| Pin 76 | TX_CLK — Port 6/7 RGMII/MII transmit clock |
| Pin 77 | RX_CLK — Port 6/7 RGMII/MII receive clock |
| Pin 78 | TXD0 — RGMII/MII/RMII transmit data 0 |
| Pin 79 | TXD1 — RGMII/MII/RMII transmit data 1 |
| Pin 80 | TXD2 — RGMII transmit data 2 |
| Pin 81 | TXD3 — RGMII transmit data 3 |
| Pin 82 | TX_EN — Transmit enable |
| Pin 83 | RXD0 — RGMII/MII/RMII receive data 0 |
| Pin 84 | RXD1 — RGMII/MII/RMII receive data 1 |
| Pin 85 | RXD2 — RGMII receive data 2 |
| Pin 86 | RXD3 — RGMII receive data 3 |
| Pin 87 | RX_DV — Receive data valid |
| Pin 88 | CRS_DV — Carrier sense / data valid (MII/RMII) |
| Pin 89 | MDC — Management data clock (PHY MIIM) |
| Pin 90 | MDIO — Management data I/O (PHY MIIM) |
| Pin 91 | REF_CLK — Reference clock input |
| Pin 92 | VDD_1V8 — 1.8 V core supply |
| Pin 93 | GND — Ground |
| Pin 94 | TEST — Test mode (tie to strap-internal pull-down per datasheet) |
| Pin 95 | NC — Not connected |
| Pin 96 | NC — Not connected |
| Pin 97 | VDD_3V3 — 3.3 V I/O supply |
| Pin 98 | GND — Ground |
| Pin 99 | P5_LED — Port 5 LED (alt mapping) |
| Pin 100 | P4_LED — Port 4 LED (alt mapping) |
| Pin 101 | P3_LED — Port 3 LED (alt mapping) |
| Pin 102 | P2_LED — Port 2 LED (alt mapping) |
| Pin 103 | P1_LED — Port 1 LED (alt mapping) |
| Pin 104 | VDD_2V5 — 2.5 V analog supply |
| Pin 105 | GND — Ground |
| Pin 106 | NC — Not connected |
| Pin 107 | NC — Not connected |
| Pin 108 | JTAG_TCK — JTAG test clock |
| Pin 109 | JTAG_TMS — JTAG test mode select |
| Pin 110 | JTAG_TDI — JTAG test data in |
| Pin 111 | JTAG_TDO — JTAG test data out |
| Pin 112 | JTAG_TRST_N — JTAG test reset (active-low) |
| Pin 113 | VDD_1V8 — 1.8 V core supply |
| Pin 114 | GND — Ground |
| Pin 115 | NC — Not connected |
| Pin 116 | NC — Not connected |
| Pin 117 | P6_SGMII_REF — Port 6 SGMII reference clock |
| Pin 118 | P7_SGMII_REF — Port 7 SGMII reference clock |
| Pin 119 | VDD_3V3 — 3.3 V I/O supply |
| Pin 120 | GND — Ground |
| Pin 121 | NC — Not connected |
| Pin 122 | NC — Not connected |
| Pin 123 | P6_LED_LINK — Port 6 link LED |
| Pin 124 | P7_LED_LINK — Port 7 link LED |
| Pin 125 | VDD_1V8 — 1.8 V core supply |
| Pin 126 | GND — Ground |
| Pin 127 | NC — Not connected |
| Pin 128 | NC — Not connected |
Aplicaciones típicas
KSZ9897RTXC es adecuado para 7 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para KSZ9897RTXC — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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) |
Diferenciadores clave
- Seven ports with five integrated Gigabit PHYs in a single 128-pin TQFP-EP package (frente a KSZ9896CTXI)
- Hardware-based wire-speed ACL/QoS engines (frente a KSZ9477STXI)
- AVB/TSN timestamping integrated on-chip (frente a KSZ8995MAI)
Notas de diseño
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.
Información de cumplimiento
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.
