DS90C031 MDR

Overview

The DS90C031QML is a quad CMOS differential line driver designed for high-speed point-to-point interfaces. It accepts TTL/CMOS inputs and converts them to low-voltage differential signaling (LVDS) with a typical output voltage of 350 mV. The device operates on a single +5V supply, drawing 25 mA when enabled and 10 mA in tri-state mode. It guarantees radiation hardness up to 100 krad(Si) and features fail-safe logic for floating inputs. Propagation delay ranges from 0.5 ns to 5.0 ns, with channel skew limited to 3.0 ns. The component supports TRI-STATE functionality and maintains high impedance outputs during power-off conditions.

Feature Summary

• Radiation guaranteed performance up to 100 krad(Si)
• High impedance LVDS outputs during power-off state
• Fail-safe logic ensures defined output states for floating inputs
• Pin compatible with industry standard DS26C31

Applications

• High speed point-to-point interface applications
• Replacement for high power pseudo-ECL devices
• Space-based and military defense applications requiring radiation tolerance

Procurement Notes

Verify the specific ordering suffix against the Package Option Addendum to confirm the correct package type, such as LCCC or CFP, and material specifications. Ensure the requested part number matches the active production status listed by Texas Instruments. Confirm that the radiation qualification requirements align with the MIL-STD-883 testing methods specified in the datasheet before finalizing procurement orders.

Selection Notes

Select this component when radiation hardness and low power consumption are critical alongside high data rates. The device serves as a direct pin-compatible replacement for the DS26C31, facilitating upgrades to LVDS technology without redesigning the PCB footprint. Consider the TRI-STATE capability if bus sharing or redundant driver configurations are required in the system architecture.

Part Context

This component belongs to the DS90C03x family of LVDS drivers, specifically the QML-qualified version intended for harsh environments. It pairs with the DS90C032 receiver to form a complete communication link. The device is distinct from commercial variants due to its rigorous radiation testing and adherence to military quality standards, making it suitable for aerospace and defense systems.

Replacement Considerations

The DS90C031 is pin-compatible with the DS26C31. Verify that the existing system design accommodates the lower voltage swing of LVDS compared to RS-422 levels when substituting.