DMMT3906W-7-F

Overview

The DMMT3906W-7-F is a matched pair of PNP small signal transistors manufactured by Diodes Incorporated in an SOT-363 surface-mount package. It features a collector-emitter breakdown voltage (BVCEO) of -40V and a maximum continuous collector current (IC) of -200mA. The device provides a power dissipation rating of 200mW at +25°C, with a thermal resistance (RθJA) of 625 °C/W. Operating temperature ranges from -65°C to +150°C. Electrical characteristics include a DC current gain (hFE) ranging from 60 to 300 depending on the collector current, and a transition frequency (fT) of 250 MHz. Matching specifications ensure a 2% tolerance on current gain and a 2mV difference in base-emitter voltage.

Feature Summary

• Intrinsically matched pair of PNP transistors built using adjacent die from the same wafer for high precision.
• Fully internally isolated within a compact SOT-363 surface mount package.
• Qualified to AEC-Q101 standards for automotive applications and capable of PPAP submission.

Applications

• Current mirrors
• Differential and instrumentation amplifiers
• Comparators

Procurement Notes

Verify the specific ordering suffix '-7-F' corresponds to the standard reel packaging containing 3,000 units per 8mm tape width. Confirm that the 'K4B' marking code matches the required production date code format for your assembly timeline. Ensure compliance with RoHS 3 and halogen-free requirements if mandated by your design specifications.

Selection Notes

Select this component when precise matching between two PNP transistors is required in a minimal footprint. The intrinsic matching eliminates the need for external trimming in sensitive analog circuits. Consider the 200mW power dissipation limit and the 625 °C/W thermal resistance when designing the PCB copper pad layout to ensure adequate heat sinking under steady-state operating conditions.

Part Context

This part belongs to the DMMT3906 series of matched transistor pairs. It serves as the dual-transistor counterpart to single-transistor variants like the MMBT3906. While electrically similar to other matched pairs in the lineup, it is distinct from NPN counterparts such as the DMMT3904W. The device is designed specifically for applications requiring tight parameter matching without occupying multiple discrete component locations.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and electrical limits before considering any alternative matched-pair devices from other manufacturers.

FAQ

What is the guaranteed matching tolerance for the base-emitter voltage?

The datasheet specifies a matching tolerance of 2mV for the base-emitter voltage difference (VBE1 - VBE2) when tested at IC = -2mA and VCE = -5V.

How is the device qualified for automotive use?

The DMMT3906W-7-F is qualified to AEC-Q101 standards for high reliability and is PPAP capable, making it suitable for automotive electronics applications.

What is the typical switching delay time for this transistor?

The typical delay time (tD) is 35 ns, measured under conditions of VCC = -3.0V, IC = -10mA, VBE(OFF) = 0.5V, and IB1 = -1.0mA.