Diodes Incorporated MMDT3906VC-7

Overview

MMDT3906VC-7 from Diodes Incorporated is a dual PNP small-signal surface-mount transistor in SOT-563 package, rated for V_CEO = −40 V, I_C = −200 mA, and P_D = 150 mW. It delivers h_FE = 60–300 at I_C = −100 µA to −100 mA and V_CE(SAT) = −0.25 V (typ.) at I_C = −10 mA/I_B = −1 mA, used in low-power switching and amplification stages of portable audio bias networks and LED driver current sinks.

For engineers reviewing the MMDT3906VC-7 datasheet, MMDT3906VC-7 pinout, MMDT3906VC-7 application, or MMDT3906VC-7 equivalent, key selection criteria include dual PNP topology, SOT-563 footprint compatibility, guaranteed h_FE minima across I_C range, V_BE(SAT) ≤ −0.95 V at high drive, and RoHS-compliant "Green" molding compound compliance.

Technical Context

This dual PNP transistor uses epitaxial planar die construction for stable gain and low leakage. Its symmetrical dual configuration supports matched-pair operation in differential amplifiers or complementary switching nodes without external balancing components.

Thermal design is constrained by R_θJA = 833 °C/W on FR-4 PCB per AP02001 layout, requiring careful trace width and copper pour planning. Switching performance (t_d/t_r/t_s/t_f) is characterized under −3.0 V V_CC, −10 mA I_C, and −1.0 mA I_B, confirming suitability for <1 MHz digital logic interfacing.

Key Specifications

Pinout & Package

Package: SOT-563 - ultra-small 6-pin surface-mount plastic package with matte tin-plated copper leadframe, UL 94V-0 rating, and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual PNP transistor applications.

Compared with DMT3906W-7 and NSVD3906DXV6T1G, MMDT3906VC-7 uniquely delivers dual PNP matching, smallest footprint (SOT-563), and lowest unit weight (0.003 g), making it optimal for ultra-dense portable and wearable electronics where thermal coupling and area are critical.

Availability

MMDT3906VC-7 is available at Aetrix Electronics and suitable for LED current sink control, low-voltage level shifting, and differential pair amplifier applications requiring stable component supply, consistent parametric binning, and long-term industrial lifecycle support.

Supply support for MMDT3906VC-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in Taiwan and China.

MMDT3906VC-7 belongs to Diodes' small-signal transistor product line, engineered specifically for space-constrained, low-power portable electronics requiring dual matched transistors in green-compliant packaging.

FAQ

What is the maximum allowable junction temperature for MMDT3906VC-7?

The absolute maximum junction temperature is +150°C, as specified in the Operating and Storage Temperature Range. Derating begins at +25°C ambient per Figure 1: at +85°C ambient, maximum power dissipation drops to 75 mW (50% of 150 mW) due to R_θJA = 833 °C/W. Exceeding T_J = +150°C risks permanent parametric shift or bondwire failure.

Can MMDT3906VC-7 be used in linear amplifier mode?

Yes - its h_FE stability (60–300 across I_C = 100 µA–100 mA), low noise figure (4.0 dB), and f_T = 250 MHz support Class-A small-signal amplification up to ~25 MHz. However, thermal limits (P_D = 150 mW) restrict continuous linear operation to I_C < 50 mA at V_CE ≈ 2 V to avoid exceeding T_J = +150°C.

Is the SOT-563 package polarized, and how is orientation verified?

No - the SOT-563 package is non-polarized per Note 2 in the datasheet. Orientation on tape is not guaranteed: parts may appear in standard orientation, rotated 180°, or mixed. Pin 1 identification relies solely on the device marking (ARK YM code) and must be confirmed optically using the top-side marking alignment relative to the package notch or dot, not physical symmetry.

Does MMDT3906VC-7 support hot-swap or in-circuit programming?

No - it is not designed for hot-swap operation. The device lacks ESD protection beyond standard HBM (unspecified in this datasheet), and its V_EBO = −5.0 V rating means base-emitter reverse bias must be strictly limited during live insertion. For in-circuit programming interfaces, external series resistors and clamping diodes are required to prevent latch-up or junction damage.