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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Bipolar Transistor Arrays

Diodes Incorporated MMDT3904V-7

Name: MMDT3904V-7
Brand: Diodes Incorporated
SKU: MMDT3904V-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMDT3904V-7

Manufacturer:: Diodes Incorporated

Category:: Bipolar Transistor Arrays

Package:: SOT-563, SOT-666

Datasheet:: MMDT3904V-7.pdf

Description:: TRANS 2NPN 40V 200MA SOT-563

Quantity:: RFQ Add To RFQ list

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Inventory:8,462

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Product details

Overview

MMDT3904V-7 from Diodes Incorporated is a dual NPN small-signal transistor in SOT-563 package, designed for low-power amplification and switching functions. It features V_CEO = 40 V, I_C = 200 mA, P_D = 200 mW, h_FE = 40–300 (at I_C = 100 µA to 100 mA), and f_T = 300 MHz - enabling use in compact logic-level interface circuits and portable sensor signal conditioning.

For engineers reviewing the MMDT3904V-7 datasheet, MMDT3904V-7 pinout, MMDT3904V-7 application, or MMDT3904V-7 equivalent, key selection criteria include its dual-NPN configuration, SOT-563 footprint compatibility, low V_CE(SAT) (0.20 V at I_C = 10 mA), high f_T, and RoHS-compliant green molding compound.

Technical Context

This dual NPN transistor uses epitaxial planar die construction for stable gain and low leakage. Its two independent NPN junctions share a common SOT-563 six-terminal package with isolated collectors and emitters, supporting discrete push-pull or differential pair topologies without cross-coupling.

Thermal performance is defined by R_θJA = 625 °C/W on FR-4 PCB per AP02001 layout, and operation is rated from –55 °C to +150 °C. Switching parameters (t_d, t_r, t_s, t_f) are specified under V_CC = 3.0 V, enabling reliable 10–50 mA digital switching in space-constrained designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - supports rail-to-rail switching up to 3.3 V/5 V logic systems with margin
I_C (max)	200 mA - sufficient for driving LEDs, small relays, or logic buffers
P_D	200 mW - limits continuous dissipation in unheatsinked SOT-563 layouts
h_FE	40–300 - enables bias stability across 0.1–100 mA collector loads
f_T	300 MHz - allows RF preamp or high-speed digital switching up to ~100 MHz
V_CE(SAT)	0.20 V @ I_C=10 mA - minimizes voltage drop and power loss in saturated switch mode
NF	5.0 dB @ I_C=100 µA - suitable for low-noise audio or sensor front-end amplification

Pinout & Package

Package: SOT-563 - ultra-small surface-mount plastic case (1.60 mm × 1.20 mm × 0.60 mm), UL 94V-0 rated, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter of Transistor 1	Low-impedance current sink node; tied to ground or reference in common-emitter switches
2	Base of Transistor 1	Control input requiring ~0.7 V forward bias; drives with 1–5 mA for full saturation
3	Collector of Transistor 1	Active output node; connects to load supply rail or pull-up resistor
4	Collector of Transistor 2	Independent high-side output; electrically isolated from Q1 collector
5	Base of Transistor 2	Second control input; identical drive requirements to Pin 2
6	Emitter of Transistor 2	Second independent emitter; may be tied separately or paralleled with Pin 1

Key Features

Feature	Design Value
Dual isolated NPN structure	Enables compact differential pairs or independent switching channels in one footprint
Ultra-small SOT-563 package	Reduces board area by >40% vs. SO-8 or SC-70-6 equivalents
RoHS-compliant & "Green" molding compound	Meets global environmental compliance without halogen/Sb₂O₃ flame retardants
Low V_CE(SAT) and high f_T	Supports both efficient DC switching and mid-bandwidth analog amplification

Applications

Portable Sensor Interface

Logic-Level Translation

Use Scenario: Amplifying weak analog outputs from MEMS accelerometers or temperature sensors in battery-powered wearables.

IC Role / Device Role / Timing Role: Discrete NPN amplifier stage providing 20–50× voltage gain with <5 dB noise figure.

Use Value: Enables direct ADC interfacing without external op-amps, reducing BOM count and quiescent current.

Use Scenario: Converting 1.8 V GPIO signals to 3.3 V levels for MCU peripherals in mixed-voltage IoT nodes.

IC Role / Device Role / Timing Role: Active pull-up switch configured as level shifter with <35 ns rise/fall times.

Use Value: Eliminates need for dedicated level-shifting ICs while maintaining timing integrity at 10 MHz data rates.

Dual-Channel LED Driver

Compact Push-Pull Output Stage

Use Scenario: Driving two status LEDs (e.g., power + fault) from separate microcontroller pins in medical handheld devices.

IC Role / Device Role / Timing Role: Two independent saturated switches controlling cathode-side LED current up to 20 mA each.

Use Value: Saves PCB space versus two discrete SOT-23 transistors; shares thermal path and reduces assembly cost.

Use Scenario: Generating complementary square-wave outputs for gate driving or clock distribution in low-power FPGA I/O banks.

IC Role / Device Role / Timing Role: Dual NPN pair configured as emitter-follower push-pull buffer with matched h_FE tracking.

Use Value: Improves drive strength and edge symmetry over single-transistor buffers, reducing EMI in 10–50 MHz clock paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual NPN switching and amplification applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN3026LSD-13	Single-channel N-channel MOSFET (30 V, 2.6 A); no bipolar gain or linear region	Better for high-current, low-V_GS switching; unsuitable for analog amplification or low-I_B drive	Select when replacing saturated-switch only functions with lower gate drive burden and higher I_D
MMBT3904DW-7-F	Same die, identical specs, but in SOT-363 package (larger footprint, different pinout: 1–2–3 = E-B-C, 4–5–6 = C-B-E)	Requires PCB redesign; same electrical behavior and thermal derating	Choose only if legacy SOT-363 layout reuse is required; not drop-in compatible with SOT-563

Compared with DMN3026LSD-13 and MMBT3904DW-7-F, the MMDT3904V-7 uniquely delivers bipolar linearity, low-noise amplification capability, and minimal footprint - making it optimal where dual-channel analog gain or precise saturation control is needed within tight board area constraints.

Availability

MMDT3904V-7 is available at Aetrix Electronics and suitable for portable sensor interfaces, logic-level translation, dual-channel LED driving, and compact push-pull output stages requiring stable component supply and consistent green-material compliance.

Supply support for MMDT3904V-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, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The MMDT3904V-7 belongs to Diodes' small-signal transistor product line, engineered specifically for space-constrained, low-power amplification and switching applications where dual-device integration and environmental compliance are critical.

FAQ

What is the pin configuration for MMDT3904V-7 in SOT-563?

Pin 1 = Emitter of Q1, Pin 2 = Base of Q1, Pin 3 = Collector of Q1, Pin 4 = Collector of Q2, Pin 5 = Base of Q2, Pin 6 = Emitter of Q2. This arrangement supports independent operation of both transistors with shared thermal mass but no internal connection between channels.

Is MMDT3904V-7 suitable for linear amplification applications?

Yes - its h_FE range (40–300), low NF (5.0 dB), and f_T = 300 MHz support Class-A and Class-AB small-signal amplification up to ~50 MHz. Bias stability is confirmed across I_C = 100 µA to 10 mA per the datasheet's Fig. 3 and Fig. 4.

How does the SOT-563 package affect thermal performance?

R_θJA = 625 °C/W is measured on a standard FR-4 PCB per AP02001 layout. Derating begins above 25 °C ambient (Fig. 1), limiting usable P_D to ~120 mW at 70 °C ambient - requiring careful layout or reduced I_C in enclosed environments.

Does MMDT3904V-7 have qualified lead-free and halogen-free status?

Yes - it is lead-free by design and RoHS compliant (Note 3). Devices manufactured from Date Code UO (week 40, 2007) onward use green molding compound free of halogens and Sb₂O₃, verified per Diodes Inc.'s published Green Policy.

MMDT3904V-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-563, SOT-666

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: 2 NPN (Dual)

Current - Collector (Ic) (Max):: 200mA

Voltage - Collector Emitter Breakdown (Max):: 40V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 1V

Power - Max:: 200mW

Frequency - Transition:: 300MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-563

MMDT3904V-7 FAQ

1.How can I place an order for MMDT3904V-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMDT3904V-7 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 MMDT3904V-7 reliable?

The price and inventory of MMDT3904V-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMDT3904V-7 is usually 5 days.

3.What payment methods are accepted for MMDT3904V-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMDT3904V-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMDT3904V-7?

MMDT3904V-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMDT3904V-7 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 MMDT3904V-7?

For technical support, including MMDT3904V-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMDT3904V-7 requirements.

6.How does Aetrix verify that MMDT3904V-7 is sourced from the original manufacturer or authorized distributors?

All MMDT3904V-7 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 MMDT3904V-7 meets industry standards.

7.What is the process for return or replacement of MMDT3904V-7?

All MMDT3904V-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMDT3904V-7, 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 MMDT3904V-7 part is unused and in its original packaging.

Return procedure for MMDT3904V-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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