HXT4101A-DNT

Overview

The HXT4101A-DNT is a compact VCSEL driver designed for high-performance, low-power optical modules. It handles complete digital-to-optical conversion, including CML input, laser driver, drive control, and supervision. The device operates in standalone mode or I2C-controlled mode. Key electrical parameters include a power consumption of 65 mW per channel while delivering 7 mA average and 7 mA modulation current. Maximum ratings are 10 mA average and 10 mA modulation current, with a maximum burn-in current of 15 mA. The component is available as a bare die measuring 1.1 mm x 1.1 mm, operating within a temperature range of -40 °C to +100 °C.

Feature Summary

• Supports both standalone operation without a microcontroller and I2C-controlled programmable modes.
• Integrates embedded monitoring circuits for A/D read-out of temperature, effective VCSEL current, and monitor photo-current.
• Provides complete sets of control and diagnostic features for co-packaged VCSEL and driver assemblies.

Applications

• OC-192/STM-64 transmission systems
• 10GBASE-SR applications
• 2G/4G/8G/16G Fiber Channel links
• USB 4.0 active optical cables
• Avionic optical interconnects

Procurement Notes

Verify the specific ordering suffix '-DNT' corresponds to the bare die package configuration when sourcing components. Confirm that the manufacturer documentation aligns with the Integrated Device Technology (IDT) product brief specifications. Ensure compatibility with the intended optical module design requirements before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a compact solution for digital-to-optical conversion in optical transceivers. Consider the 65 mW power consumption and 7 mA drive currents for standard VCSEL applications. Evaluate the need for I2C programmability versus standalone operation based on system architecture constraints.

Part Context

This part belongs to the HXT4101A series of VCSEL drivers manufactured by Integrated Device Technology (IDT), which was acquired by Renesas Electronics Corporation. The series is engineered for use in compact optical modules where low power consumption and small form factors are critical design priorities.

Replacement Considerations

Consult official IDT/Renesas documentation for confirmed substitute part numbers. Verify pinout and electrical parameter compatibility before replacing the HXT4101A-DNT with alternative devices in existing optical module designs.

FAQ

What is the maximum burn-in current rating for the HXT4101A?

The maximum burn-in current rating for the HXT4101A is 15 mA.

Does the HXT4101A require a microcontroller for operation?

No, the HXT4101A can be used in standalone mode without a microcontroller, though it also supports I2C-controlled mode for programmability.

What monitoring capabilities does the HXT4101A provide?

The device includes embedded monitoring circuits that enable A/D read-out of temperature, effective VCSEL current, and monitor photo-current.