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Renesas HXT5104A-DNT
- Part No.:
- HXT5104A-DNT
- Manufacturer:
- Renesas
- Category:
- Laser Drivers
- Package:
- Die
- Datasheet:
-
HXT5104A-DNT.pdf
- Description:
- DIE SALE (PRICE IN GOOD DIE)-WAF
- Quantity:
- Payment:
- Shipping:
Inventory:3,242
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Product details
Overview
HXT5104A-DNT from Integrated Device Technology (IDT) is a 4-channel VCSEL driver IC for high-speed optical transmitters, delivering 14 Gbps per channel with 5 mA average and 5 mA modulation current, 46 mW/channel power consumption, and QSFP MSA/InfiniBand QDR-FDR/40GBASE-SR4 compliance - deployed in IEEE 802.3ba Ethernet transceivers and active optical cables.
For engineers reviewing the HXT5104A-DNT datasheet, HXT5104A-DNT pinout, HXT5104A-DNT application, or HXT5104A-DNT equivalent, key selection criteria include per-channel laser drive capability, thermal supervision via VTHERM, 2-wire I²C control interface (SCL/SDA), symmetric pad layout for module assembly, and bare-die form factor compatibility with compact optical subassemblies.
Technical Context
The HXT5104A-DNT integrates four independent CML-input laser drivers with programmable bias and modulation current control, real-time IMON monitoring, and integrated VCSEL supervision including thermal sensing (VTHERM) and fault detection (FAULT). It supports both common-cathode and isolated VCSEL arrays.
Control is implemented via a 2-wire I²C interface (SCL/SDA) with configuration registers (CONF1/CONF2), laser disable, signal detect, and emphasis control (X=1–4). The device operates across 0°C to +95°C and requires no external passive components beyond decoupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent VCSEL drivers for parallel optical links |
| Data Rate | 14 Gbps per channel, supporting 40G-BASE-SR4 and InfiniBand FDR |
| Output Current | 5 mA average / 5 mA modulation (typical); up to 10 mA avg / 10 mA mod (max) |
| Power per Channel | 46 mW at typical operating conditions, enabling low-thermal-density modules |
| Interface | 2-wire I²C (SCL/SDA) for configuration, monitoring, and fault reporting |
| Compliance | QSFP MSA, InfiniBand QDR/FDR, IEEE 802.3ba 40GBASE-SR4 |
| Package | Bare die, 2.05 mm × 1.67 mm, solder bump version available |
Pinout & Package
Package: Bare die, 2.05 mm × 1.67 mm, designed for flip-chip mounting in optical subassemblies using solder bumps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AxP / AxN | Differential CML data input (per channel) | Accepts 14 Gbps NRZ signals; internal termination and AC coupling support |
| LPx | Laser pulse output (per channel) | Drives VCSEL anode with programmable bias/modulation current |
| IMON | Analog current monitor output | Provides real-time per-channel modulation current feedback for closed-loop control |
| VTHERM | Thermal sensor output | Analog voltage proportional to die temperature for thermal derating/safety shutdown |
| SCL / SDA | I²C serial clock/data | Configures drive settings, reads status (FAULT, EQ, NOTINT), enables laser disable |
| CONF1 / CONF2 | Configuration strap inputs | Set default mode (e.g., emphasis level, laser polarity) at power-up without I²C |
| FAULT | Open-drain fault indicator | Asserts low on overtemperature, overcurrent, or VCSEL open-circuit condition |
| Laser Disable | Active-low global enable | Hardware-controlled shutdown of all four channels for safety or power management |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel IMON monitoring | Enables real-time modulation current calibration and closed-loop bias control in production and field operation |
| Integrated VTHERM sensor | Provides die-temperature feedback without external thermistors, simplifying thermal management in sealed modules |
| Symmetric pad layout | Supports identical routing for all four channels, reducing layout complexity and skew in multi-lane optical assemblies |
| QSFP MSA-compliant control interface | Direct integration into standard QSFP+ and QSFP28 host systems without protocol translation or glue logic |
| Bare-die form factor | Minimizes footprint and parasitic inductance for high-frequency VCSEL drive, enabling <1.5 mm optical subassembly height |
Applications
| 40GBASE-SR4 Optical Transceivers | InfiniBand FDR Active Optical Cables |
|---|---|
Use Scenario: 40G Ethernet short-reach multimode fiber links in data center top-of-rack switches. IC Role / Device Role / Timing Role: VCSEL driver array converting parallel 4×10.3125 Gbps electrical lanes to optical signals. Use Value: Meets IEEE 802.3ba SR4 eye mask requirements with 5 mA modulation drive and integrated CML input equalization. | Use Scenario: 56 Gbps InfiniBand FDR interconnects between servers and storage using active optical cables. IC Role / Device Role / Timing Role: Four-channel laser driver providing precise current control and thermal supervision for quad VCSEL array. Use Value: Enables full FDR link compliance with built-in emphasis control (X=1–4) and fault reporting via FAULT pin. |
| QSFP+ Pluggable Modules | Proprietary Multi-Channel Optical Engines |
Use Scenario: Hot-pluggable QSFP+ transceivers for enterprise networking equipment requiring MSA-defined control interface. IC Role / Device Role / Timing Role: MSA-compliant VCSEL driver with I²C register map, signal detect, and laser disable functionality. Use Value: Eliminates need for external I²C translators or GPIO expanders; supports full MSA digital diagnostics implementation. | Use Scenario: Custom optical interconnects for AI accelerators or HPC backplanes requiring compact, low-power optical I/O. IC Role / Device Role / Timing Role: Bare-die VCSEL driver enabling direct flip-chip integration into proprietary optical subassemblies. Use Value: Reduces total solution size by >30% vs. packaged alternatives while maintaining 14 Gbps/channel performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCSEL driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3999AETL+ | Single-channel, 10.3 Gbps max, 3.3 V supply, TQFN package | Not suitable for 4-channel parallel 40G systems; requires four separate ICs and additional layout area | Consider only for lower-data-rate, space-tolerant single-lane designs where integration density is not critical |
| TI SN65LVPE502ARHBR | 4-channel PCIe/SAS redriver (not laser driver); no VCSEL bias/modulation control or IMON/VTHERM | Cannot drive VCSELs directly; lacks laser-specific supervision and safety features | Only viable as signal conditioner upstream of a discrete laser driver - not a functional substitute for HXT5104A-DNT |
Compared with MAX3999AETL+ and SN65LVPE502ARHBR, the HXT5104A-DNT uniquely delivers integrated 4-channel 14 Gbps VCSEL drive with per-channel current monitoring, thermal sensing, and MSA-compliant control in a bare-die format - essential for compact, standards-compliant optical modules.
Availability
HXT5104A-DNT is available at Aetrix Electronics and suitable for 40G Ethernet transceivers, InfiniBand active optical cables, and proprietary multi-channel optical engines requiring stable component supply and qualified bare-die sourcing.
Supply support for HXT5104A-DNT 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
Integrated Device Technology (IDT) is a fabless semiconductor company specializing in timing, memory interface, RF, and optical interconnect solutions, acquired by Renesas in 2019.
The HXT5104A-DNT belongs to IDT's high-speed optical driver product line, engineered specifically for compact, low-power, MSA-compliant optical transmitter modules in data center and HPC interconnects.
FAQ
What is the maximum modulation current supported by the HXT5104A-DNT?
The HXT5104A-DNT supports up to 10 mA modulation current per channel, with typical operation at 5 mA modulation current. This rating is validated under specified thermal conditions and aligns with VCSEL array requirements for 40G-BASE-SR4 and InfiniBand FDR compliance. Exceeding 10 mA may trigger FAULT assertion or require derating per thermal limits defined in the HXT5104A-DNT datasheet.
Does the HXT5104A-DNT include built-in thermal protection?
Yes, the HXT5104A-DNT integrates a die-temperature sensor with analog VTHERM output and automatic FAULT assertion on overtemperature. The VTHERM voltage scales linearly with junction temperature, enabling host-system thermal management without external sensors. This feature is active across the full 0°C to +95°C operating range and is documented in the HXT5104A-DNT Product Brief.
Is the HXT5104A-DNT pin-compatible with other IDT VCSEL drivers like the HXT5102A?
No, the HXT5104A-DNT is not pin-compatible with the HXT5102A. The HXT5102A is a 2-channel variant with different pin count, pad layout, and terminal assignment. The HXT5104A-DNT's 4-channel bare-die design uses a unique symmetric pad arrangement optimized for quad VCSEL arrays, as shown in Figure 1 of the HXT5104A-DNT Product Brief.
Can the HXT5104A-DNT drive both common-cathode and isolated VCSEL arrays?
Yes, the HXT5104A-DNT is explicitly designed to support both common-cathode and isolated VCSEL array configurations. Its LPx outputs are configured as high-side current sources with independent return paths, allowing flexible PCB layout and compatibility with multiple VCSEL vendor offerings - a key specification confirmed in the HXT5104A-DNT General Description section.
What interface does the HXT5104A-DNT use for configuration and monitoring?
The HXT5104A-DNT uses a standard 2-wire I²C interface (SCL and SDA pins) for full register-based configuration, real-time status monitoring (including FAULT, EQ, NOTINT), and dynamic control of laser parameters. Configuration straps (CONF1/CONF2) provide non-volatile default settings at power-up, but all runtime adjustments require the I²C interface as defined in the HXT5104A-DNT Product Brief.
HXT5104A-DNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Laser Diode Driver
- Data Rate:
- 14Gbps
- Number of Channels:
- 4
- Voltage - Supply:
- -
- Current - Supply:
- -
- Current - Modulation:
- 10mA
- Current - Bias:
- -
- Operating Temperature:
- 0°C ~ 95°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- Die
- Mounting Type:
- Surface Mount
HXT5104A-DNT FAQ
1.How can I place an order for HXT5104A-DNT through Aetrix?
Please submit a Request for Quotation (RFQ) for HXT5104A-DNT 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 HXT5104A-DNT reliable?
The price and inventory of HXT5104A-DNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HXT5104A-DNT is usually 5 days.
3.What payment methods are accepted for HXT5104A-DNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HXT5104A-DNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HXT5104A-DNT?
HXT5104A-DNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HXT5104A-DNT 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 HXT5104A-DNT?
For technical support, including HXT5104A-DNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HXT5104A-DNT requirements.
6.How does Aetrix verify that HXT5104A-DNT is sourced from the original manufacturer or authorized distributors?
All HXT5104A-DNT 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 HXT5104A-DNT meets industry standards.
7.What is the process for return or replacement of HXT5104A-DNT?
All HXT5104A-DNT units undergo pre-shipment inspection (PSI). If there is an issue with HXT5104A-DNT, 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 HXT5104A-DNT part is unused and in its original packaging.
Return procedure for HXT5104A-DNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HXT5104A-DNT Tags
-
EPC21701
EPC
-
EPC21601
EPC
-
MAX3799ETJ+T
Analog Devices Inc./Maxim Integrated
-
AD9665ACPZ-REEL7
Analog Devices Inc.
-
MAX3740AETG+T
Analog Devices Inc./Maxim Integrated
-
MAX3795ETG+
Analog Devices Inc./Maxim Integrated
-
EPC21603
EPC
-
ONET8501VRGPT
Texas Instruments
-
MAX3738ETG+T
Analog Devices Inc./Maxim Integrated
-
SY88022ALMG-TR
Microchip Technology
-
ISL78365ARZ-T7A
Renesas
-
EPC21603ENGRT
EPC
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