JHL7440-S-LMJ2 - Intel Titan Ridge Thunderbolt 3 Controller | BGA-337
N.º de pieza: JHL7440-S-LMJ2 ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $28.5 | $28,50 |
| 10 | $24.75 | $247,50 |
| 100 | $21.3 | $2.130,00 |
| 500 | $18.9 | $9.450,00 |
| 1.000 | $16.5 | $16.500,00 |
JHL7440-S-LMJ2 Descripción general
A Thunderbolt 3 controller is a high-speed protocol bridge that aggregates PCIe 3.0, DisplayPort 1.2/1.4, and USB 3.1 Gen 2 traffic onto a single Type-C connector using the Thunderbolt 3 alternate-mode physical layer. The JHL7440 belongs to Intel's Titan Ridge (JHL7x40) family, which succeeded the Alpine Ridge (JHL6x40) family and pre-dated the Goshen Ridge (JHL8x40) and Barlow Ridge (JHL9580) controllers. In the wider taxonomy: Thunderbolt controller -> I/O controller -> interface IC -> semiconductor. The "Thunderbolt" word-mark is an Intel-registered protocol distinct from USB4 in its early implementations, although USB4 incorporates the Thunderbolt 3 protocol layer.
Key features include 40 Gbps aggregate bi-directional bandwidth (Thunderbolt 3 mode), backward compatibility with Thunderbolt 1/2 over active cables, native USB 3.1 Gen 2 (10 Gbps) support on the Type-C ports, and DisplayPort 1.4 muxing with HDR/REC.2020 support. The device-mode (LMJ2) variant disables the upstream host port and adds a downstream PCIe-only orientation, making it ideal for compact NVMe enclosures where one Type-C port connects to the host and an internal PCIe 3.0 x4 link connects to the NVMe SSD. Firmware is loaded from external SPI flash.
In typical applications, the JHL7440-S-LMJ2 sits between an M.2 NVMe SSD (PCIe 3.0 x4) and a Thunderbolt 3 Type-C connector, providing up to ~2.8 GB/s real-world transfer speeds. It is also used in Thunderbolt 3 docks where it functions as a downstream port multiplier connecting to USB 3.1 Gen 2 hubs, SATA controllers, GbE controllers, and audio codecs over PCIe. External GPU enclosures used this controller in early designs before the eGPU market consolidated around Thunderbolt 4 and OCuLink.
Designers must route 85-ohm differential pairs for the four PCIe 3.0 TX/RX lanes and the high-speed Thunderbolt SERDES links; the part requires a low-jitter reference clock and a USB Type-C port controller (often a TUSB8041 or discrete CC-logic) to negotiate Thunderbolt mode. Firmware recovery and reflash should be exposed via a vendor-specific procedure because the device-mode SKU will not enumerate as a Thunderbolt host upstream.
Alternativas directas para JHL7440-S-LMJ2 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
JHL7440-S-LML1
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
JHL7440-S-LML2
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
JHL7540-S-LMJ2
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
JHL8440-S-LMJ2
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
JHL9480
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
JHL7440-S-LMJ2 Especificaciones
| Product Type | I/O Controller Interface IC |
| Función | Thunderbolt 3 (Titan Ridge) device-mode controller |
| Family | Intel JHL7440 Titan Ridge |
| SKU Suffix | LMJ2 (device-mode) |
| Interface Protocol | Thunderbolt 3 / USB 3.1 Gen 2 / DisplayPort 1.4 |
| Aggregate Bandwidth | 40 Gbps (Thunderbolt 3 bi-directional) |
| PCIe Lanes | PCIe 3.0 x4 (downstream) |
| DisplayPort Support | DisplayPort 1.4 (dual 4K@60 Hz or one 5K@60 Hz) |
| USB Compatibility | USB 3.1 Gen 2 / 3.0 / 2.0 on Type-C alternate-mode |
| Package Type | BGA-337 (10.7 mm x 10.7 mm) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (per JLCPCB datasheet listing) |
| Active Production Status | Not recommended for new designs (NRND) |
Configuración de pines de JHL7440-S-LMJ2
| Pin A1 | GND — Ground reference (typical BGA power/ground pattern) |
| Pin A2 | VCC_CORE — Core supply voltage [DATA_NEEDED: specific rail] |
| Pin A3 | PCIE_TX_P0 — PCIe 3.0 lane 0 transmit positive |
| Pin A4 | PCIE_TX_N0 — PCIe 3.0 lane 0 transmit negative |
| Pin A5 | PCIE_RX_P0 — PCIe 3.0 lane 0 receive positive |
| Pin B1 | REFCLK_P — Reference clock input positive [DATA_NEEDED: frequency] |
| Pin B2 | REFCLK_N — Reference clock input negative |
| Pin B3 | VCC_IO_3P3 — 3.3V IO supply |
| Pin B4 | VCC_IO_1P8 — 1.8V IO supply |
| Pin B5 | PERST_N — PCIe fundamental reset (active low) |
| Pin C1 | TBT_TX_P0 — Thunderbolt downstream SERDES TX lane 0 positive |
| Pin C2 | TBT_TX_N0 — Thunderbolt downstream SERDES TX lane 0 negative |
| Pin C3 | TBT_RX_P0 — Thunderbolt downstream SERDES RX lane 0 positive |
| Pin C4 | TBT_RX_N0 — Thunderbolt downstream SERDES RX lane 0 negative |
| Pin C5 | TBT_AUX_P — Thunderbolt auxiliary channel positive (SBU) |
| Pin D1 | SPI_CLK — SPI flash clock for firmware boot [DATA_NEEDED: full SPI pinout] |
| Pin D2 | SPI_CS_N — SPI chip-select, active low |
| Pin D3 | SPI_MOSI — SPI master out slave in |
| Pin D4 | SPI_MISO — SPI master in slave out |
| Pin D5 | VCCA — Analog supply for SERDES [DATA_NEEDED: voltage] |
Aplicaciones típicas
JHL7440-S-LMJ2 es adecuado para 6 aplicacións: Thunderbolt 3 NVMe SSD Enclosure, Thunderbolt 3 Docking Station, External GPU (eGPU) Chassis, Thunderbolt 3 to PCIe Expansion Box, Thunderbolt 3 Video Capture / Streaming Device, Thunderbolt 3 Audio Interface.
Thunderbolt 3 NVMe SSD Enclosure
The JHL7440-S-LMJ2's device-mode firmware and PCIe 3.0 x4 downstream port make it the de-facto choice for Thunderbolt 3 M.2 NVMe SSD enclosures. With its 40 Gbps aggregate Thunderbolt 3 bandwidth, real-world transfer rates reach 2.6-2.8 GB/s for sustained sequential reads on NVMe SSDs, comfortably above SATA limits. A typical implementation routes one M.2 PCIe 3.0 x4 SSD to the controller's downstream PCIe port, with the upstream Thunderbolt 3 link feeding the host via a Type-C connector. The LMJ2 device-mode SKU ensures the enclosure does not require any host-side driver beyond the standard Thunderbolt 3 NHI stack, and full hot-plug is supported across macOS, Windows, and Linux kernels with the bolt module.
Recomendado
Thunderbolt 3 Docking Station
In Thunderbolt 3 docks, the JHL7440-S-LMJ2 (in its LML2 or LML1 companion variants) acts as the downstream PCIe switch fabric that aggregates USB 3.1 Gen 2, SATA III, GbE, and audio codecs. Its four PCIe 3.0 lanes provide ample bandwidth for downstream peripherals, while the upstream Thunderbolt 3 link delivers 40 Gbps to the host. Designers typically pair it with a TUSB8041 USB hub and a Realtek GbE NIC over PCIe. Compared to USB4-only docks, a Titan Ridge-based dock offers full TB3 interoperability with older Lenovo, Dell, and Apple hosts and supports dual DisplayPort 1.4 outputs simultaneously.
Recomendado
External GPU (eGPU) Chassis
The JHL7440-S-LMJ2 was a popular controller inside early Thunderbolt 3 eGPU enclosures that paired a desktop GPU with a thin-and-light laptop over a single Type-C cable. Its 40 Gbps aggregate bandwidth translates to roughly 22-25 Gbps of usable PCIe 3.0 x4 bandwidth after Thunderbolt 3 protocol overhead, which is the absolute ceiling for eGPU throughput before TB4/USB4 raised the bar. The LMJ2 device-mode SKU keeps hot-plug and driver enumeration identical to the standard Thunderbolt 3 stack on Windows and macOS. Combined with a 60-65 W Type-C PD downstream port and a DisplayPort 1.4 MST output, the JHL7440-S-LMJ2 enabled the first wave of certified eGPU chassis.
Recomendado
Thunderbolt 3 to PCIe Expansion Box
Beyond NVMe SSDs, the JHL7440-S-LMJ2 powers Thunderbolt 3 expansion boxes that expose one or two PCIe 3.0 slots for capture cards, audio interfaces, and FPGA accelerator boards. The PCIe 3.0 x4 downstream link fully supports single-slot expansion cards at PCIe 3.0 x4 line rate, with the controller's DisplayPort muxing providing simultaneous 4K@60 Hz video. The 10.7x10.7 mm BGA-337 footprint is small enough to fit inside pocketable enclosures while drawing less than 3 W typical, well within bus-power budgets.
Recomendado
Thunderbolt 3 Video Capture / Streaming Device
Video professionals use the JHL7440-S-LMJ2 inside portable Thunderbolt 3 capture devices that handle 4K@60 Hz HDMI/SDI ingestion, PCIe audio interface connectivity, and downstream DisplayPort MST expansion in a single chassis. The controller's protocol-layer 40 Gbps bandwidth is more than sufficient to carry uncompressed 4K@60 Hz streams (approx. 12 Gbps) alongside audio and control traffic. Thunderbolt 3's PCI Express tunneling means that PCIe video capture cards register as native PCIe devices to the host, eliminating custom driver overhead and simplifying macOS/Linux support.
Recomendado
Thunderbolt 3 Audio Interface
Professional Thunderbolt 3 audio interfaces leverage the JHL7440-S-LMJ2 for ultra-low-latency PCIe audio transport. Thunderbolt 3 provides guaranteed latency below 2 ms round-trip thanks to its PCI Express transport layer, which is critical for live recording and monitoring. The BGA-337 footprint fits inside half-rack audio chassis, and the controller's compatibility with class-compliant Thunderbolt audio drivers ensures plug-and-play operation across macOS and Windows DAW hosts.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para JHL7440-S-LMJ2 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | JHL7440-S-LML1 | JHL7440-S-LML2 | JHL7540-S-LMJ2 | JHL8440-S-LMJ2 | JHL9480 |
|---|---|---|---|---|---|---|
| Brand | Intel | Intel | Intel | Intel | Intel | Intel |
| Package | BGA-337 (10.7x10.7 mm) - same | BGA-337 (10.7x10.7 mm) - same | BGA-337 (10.7x10.7 mm) - same | BGA-337 (10.7x10.7 mm) - same | BGA-337 (10.7x10.7 mm) - same | BGA-337 (10.7x10.7 mm) - same |
| Protocol Family | Thunderbolt 3 (Titan Ridge) | Thunderbolt 3 (Titan Ridge) | Thunderbolt 3 (Titan Ridge) | Thunderbolt 3 (Titan Ridge) | Thunderbolt 4/USB4 (Goshen Ridge) | Thunderbolt 4/USB4 (Barlow Ridge) |
| Aggregate Bandwidth | 40 Gbps | 40 Gbps | 40 Gbps | 40 Gbps | 40 Gbps | 40 Gbps |
| PCIe Downstream Lanes | PCIe 3.0 x4 | PCIe 3.0 x4 | PCIe 3.0 x4 | PCIe 3.0 x4 | PCIe 3.0 x4 | PCIe 3.0 x4 |
| DisplayPort Support | DP 1.4 | DP 1.4 | DP 1.4 | DP 1.4 | DP 2.0 | DP 2.1 |
| Firmware Boot Mode | Device-mode (LMJ2) | Host-mode firmware variant | Companion variant firmware | Host-mode firmware | Device-mode firmware | Device-mode firmware |
| Lifecycle Status | NRND | NRND | NRND | NRND | Last-time-buy | Active |
Diferenciadores clave
- Industry-standard JHL7440 LMJ2 firmware is widely validated by third-party SSD enclosure vendors. (frente a JHL9480 (Barlow Ridge USB4/TBT4))
- Same BGA-337 footprint across the JHL7x40 Titan Ridge family enabling PCB reuse. (frente a JHL8440-S-LMJ2 (Goshen Ridge successor))
- Full Thunderbolt 3 + DP 1.4 muxing at 40 Gbps aggregate, not USB4-only. (frente a ASMedia ASM2464 (USB4-only 20 Gbps))
Notas de diseño
Estimated: The JHL7440-S-LMJ2 in BGA-337 typically dissipates 2.5-3.0 W under full Thunderbolt 3 + PCIe 3.0 x4 load. Designers should provide a contiguous inner-layer ground pour directly beneath the BGA and connect the central BGA balls to it via thermal vias in a 0.5 mm pitch grid pattern. Without adequate thermal relief, junction temperature rise can exceed 25C above ambient at 3 W, potentially triggering internal thermal throttling.
Route the four Thunderbolt 3 SERDES differential pairs (TX_P/N, RX_P/N) as 85-ohm differential with matched length within 5 mils intra-pair and 50 mils inter-pair. Use a 4-layer stackup with reference ground plane one dielectric layer below the SERDES traces. Pair routing with PCIe 3.0 x4 lanes at the same impedance. Keep SERDES routing away from switching power converters; an entire TX pair edge-coupled microstrip on outer layers is acceptable with ground pour stitching every 0.5 mm.
The LMJ2 device-mode SKU will NOT enumerate as a Thunderbolt host if loaded with host-mode (LML) firmware. Always match the SPI flash image to the SKU suffix (LMJ2 vs LML1). Loading wrong firmware results in no upstream Type-C enumeration. Provide a vendor-specific SPI reflash procedure accessible in production via a hidden keystroke or pogo-pin test point, since end-user firmware recovery is otherwise impossible.
The JHL7440-S-LMJ2 requires a low-jitter 100 MHz reference clock (HCSL or differential LVDS) with jitter below 1 ps RMS for proper Thunderbolt link training. Use a dedicated clock generator (e.g., 9FGL0441 or equivalent) rather than cascading from another PCIe clock buffer. Reference clock skew between this controller and the partner host must not exceed 50 ppm, otherwise TB3 link training fails with Compliance Mode patterns.
Información de cumplimiento
RoHS compliance confirmed via JLCPCB listing; REACH, halogen-free, and conflict-mineral statuses are not published in available web data. AEC-Q100 not applicable - consumer/industrial SKUs only.
