[Ethernet SerDes] → [PCS/PMA] → [MAC/PHY] → [Packet Parser]
↓
[Flow Steering Engine]
↓
┌───────────────────────┴───────────────────────┐
↓ ↓
[Egress Scheduler] [Ingress Distributor]
↓ ↓
[PCIe DMA Engines] [Receive Buffer Tree]
↓ ↓
[PCIe PHY/Link] → [Host Memory]
| Parameter | Value | |-------------------------|---------------------------------------------| | Port Speed | 1/10/25/50/100/200/400 GbE | | Auto-negotiation | Clause 73 (backplane) / Clause 72 (optical)| | FEC | RS-FEC (544,514) for 100G+, Base-R FEC | | Link Training | Yes – CTLE/DFE adaptive | | Breakout Support | 4x 25G, 4x 50G, 2x 100G, 1x 400G | | PTP / SyncE | IEEE 1588v2 (one-step hardware timestamp) |
Critical Detail – For lossless RoCEv2, the E2H implements Priority Flow Control (PFC) on 3-8 lossless priorities and Explicit Congestion Notification (ECN) marking based on queue depth thresholds (programmable: 64KB – 1MB).
When reading the datasheet, focus on these critical sections to ensure it works with your system:
The generic "DC E2H" is rarely a single part number. Look for the full ordering code in the datasheet:
| Order Code | Input Voltage | Output Voltage | Output Current | Efficiency | | :--- | :--- | :--- | :--- | :--- | | DC E2H-05S05 | 4.5-5.5V | 5V | 200mA | 78% | | DC E2H-12S12 | 10.8-13.2V | 12V | 83mA | 80% | | DC E2H-05D12 | 4.5-5.5V | ±12V | ±42mA | 75% |
Selection Checklist:
This is the "no-go zone." Exceeding these values even for a millisecond will destroy the component.
| Parameter | Symbol | Min | Max | Unit | | :--- | :--- | :--- | :--- | :--- | | Input Voltage (5V variant) | V_in | -0.5 | 7.0 | V | | Storage Temperature | T_stg | -55 | +125 | °C | | Lead Soldering Temp | – | – | 260 | °C (10 sec) |
Engineering Insight: Never assume your 5V rail is clean. Voltage spikes from hot-plugging can exceed 7V instantly. Place a 5.6V Zener diode at the input if your system is prone to transients.
Before you buy or install the E2H, look at the datasheet and ask:
The DC E2H is a high-performance Network Interface Controller (NIC) designed for Data Center Ethernet (DC-E) fabrics, providing low-latency, high-bandwidth connectivity for enterprise and cloud infrastructure. It features specialized hardware for high reliability, availability, and serviceability (RAS) to ensure efficient data throughput in dense environments. For the full datasheet, visit Dc E2h Datasheet. Dc E2h Datasheet dc e2h datasheet
The marking code typically refers to a 1.8V Low Dropout (LDO) linear regulator
in a compact SOT23-5 package. It is most commonly associated with the TX6211B-18 or equivalent series such as the RT9193-18GB AliExpress Key Technical Specifications Based on the TX6211B datasheet
, here are the primary electrical characteristics for this component: STM32-base project Input Voltage Range : 2.5V to 5.5V. Fixed Output Voltage
: 1.8V (indicated by the "18" in the part number and "DC=E2H" code). Maximum Output Current : Typically 400mA to 500mA. Dropout Voltage : Very low, approximately 170mV to 200mV at 200mA load. Quiescent Current : Low power consumption, typically 30μA. Standby Current : Less than 1μA when in shutdown mode. Operating Temperature : -40°C to +85°C. STM32-base project Pin Configuration (SOT-23-5) The typical pinout for these LDO regulators includes: STM32-base project : Power supply input. : Ground connection. : Active-high enable pin.
: Bypass capacitor pin (for noise reduction) or No Connection. : Regulated 1.8V output. Applications [Ethernet SerDes] → [PCS/PMA] → [MAC/PHY] → [Packet
These regulators are designed for high-speed, low-noise performance in space-constrained environments: STM32-base project Battery-Powered Equipment : Smartphones, cameras, and IoT sensors. Microprocessor Power : Stable voltage rails for digital logic. Consumer Electronics : Low-noise power for RF and analog circuits. STM32-base project full PDF datasheet or a for PCB design?
The dc e2h datasheet typically shows a SIP (Single Inline Package) or DIP-4/DIP-6 configuration.
Example SIP-4 Pinout:
Critical Note: The input and output grounds are not connected internally. Do not tie them directly unless your system requires non-isolated operation (defeating the purpose of the E2H). Use the isolation barrier to break ground loops.