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

Diodes Incorporated DMMT3904W-7

Name: DMMT3904W-7
Brand: Diodes Incorporated
SKU: DMMT3904W-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DMMT3904W-7

Manufacturer:: Diodes Incorporated

Category:: Bipolar Transistor Arrays

Package:: 6-TSSOP, SC-88, SOT-363

Datasheet:: DMMT3904W-7.pdf

Description:: TRANS 2NPN 40V 200MA SOT-363

Quantity:: RFQ Add To RFQ list

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Inventory:2,136

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Product details

Overview

DMMT3904W-7 from Diodes Incorporated is a matched dual NPN small-signal transistor pair in SOT363 package, rated for 40V V_CEO, 200mA I_C, and featuring 2% h_FE matching and 2mV V_BE matching. It serves as a precision current mirror or differential pair in analog front-ends, instrumentation amplifiers, and voltage comparators where tracking performance is critical.

For engineers reviewing the DMMT3904W-7 datasheet, DMMT3904W-7 pinout, DMMT3904W-7 application, or DMMT3904W-7 equivalent, key selection criteria include intrinsic die-matching tolerance, thermal coupling in shared package, V_CE(sat) symmetry at 10mA/1mA drive, and SOT363 footprint compatibility with high-density PCB layouts.

Technical Context

The DMMT3904W-7 integrates two adjacent NPN transistors on a single silicon die to achieve intrinsic matching-verified by ≤2% h_FE ratio and ≤2mV |V_BE1 − V_BE2| at I_C = 2mA, V_CE = 5V. Its fully isolated structure prevents cross-conduction while maintaining tight parametric correlation under thermal drift.

Designed for low-noise, high-linearity analog signal conditioning, it delivers f_T = 300MHz, NF = 5.0dB at 1kHz, and switching times (t_d/t_r/t_s/t_f) ≤ 35/35/200/50ns under defined test conditions-enabling stable operation in precision DC-coupled topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C	200mA - Continuous collector current rating per transistor; supports rail-to-rail current mirror operation
h_FE Matching	≤2% - Ratio tolerance between transistors enables <0.1% gain error in active-load current mirrors
V_BE Matching	≤2mV - Absolute difference ensures <50μV input offset contribution in matched-pair amplifiers
P_D	200mW - Total device power dissipation limit at T_A = 25°C on standard FR-4 PCB
f_T	300MHz - Unity-gain frequency confirms suitability for audio-band and low-MHz signal processing
ESD HBM	4000V - Robustness against human-body model discharge supports handling in non-EPA environments

Pinout & Package

Package: SOT363 - 6-pin surface-mount package with 0.65mm pitch, 2.15mm × 2.10mm footprint, and 0.95mm height; optimized for thermal dissipation and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter of Transistor 1	Low-impedance reference node for first transistor; tied to common emitter in current mirror configurations
2	Base of Transistor 1	Control input for first transistor; requires precise biasing to maintain matching with Pin 5
3	Collector of Transistor 1	Output node for first transistor; used as active load or signal output in differential pairs
4	Collector of Transistor 2	Output node for second transistor; symmetrically placed to minimize layout-induced mismatch
5	Base of Transistor 2	Control input for second transistor; matched to Pin 2 for balanced drive in feedback networks
6	Emitter of Transistor 2	Low-impedance reference node for second transistor; electrically isolated but thermally coupled to Pin 1

Key Features

Feature	Design Value
Intrinsic die-level matching	Adjacent-die fabrication ensures correlated process variation and identical thermal gradients
2% h_FE ratio tolerance	Enables <0.05% gain error in 1:1 current mirrors without external trimming
2mV V_BE absolute difference	Reduces input offset in op-amp input stages to sub-100μV level at room temperature
Full internal isolation	Prevents latch-up and crosstalk while preserving thermal coupling for dynamic matching stability

Applications

Current Mirror Circuits

Differential Amplifiers

Use Scenario: Precision bias current generation for op-amp input stages and DAC reference buffers.

IC Role / Device Role / Timing Role: Dual-transistor active current source with matched h_FE and V_BE to enforce 1:1 current replication.

Use Value: Delivers <0.1% current error over −40°C to +125°C due to intrinsic die matching and thermal coupling.

Use Scenario: Input stage of instrumentation amplifiers requiring low input offset and high CMRR.

IC Role / Device Role / Timing Role: Matched NPN pair forming the core differential pair with common-emitter degeneration.

Use Value: Achieves <50μV input offset drift and >100dB CMRR at DC through sub-2mV V_BE mismatch.

Voltage Comparators

Active Load Circuits

Use Scenario: High-speed comparator front-end where threshold accuracy and hysteresis stability are critical.

IC Role / Device Role / Timing Role: Matched pair implementing reference and sensing legs in open-collector comparator outputs.

Use Value: Enables <1mV trip-point variation across temperature and supply voltage due to symmetrical V_BE tracking.

Use Scenario: Active load in discrete transconductance amplifiers and OTA designs.

IC Role / Device Role / Timing Role: Collector-connected transistor acting as high-impedance, temperature-stable load for gain stage.

Use Value: Provides >10MΩ small-signal impedance with <0.5%/°C tempco via matched h_FE and V_BE.

Equivalent & Alternatives

The following parts are listed as comparable options for similar matched-pair transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMT3904W-7	Same SOT363 package; identical pinout; h_FE matching ±3%, V_BE matching ±3mV	Slightly relaxed matching specs; same thermal coupling architecture	Select when ±3% matching meets system offset budget and cost sensitivity is higher
BCM847DS,115	SOT363 package; dual NPN; h_FE matching ±5%, no published V_BE matching spec	Lacks guaranteed V_BE matching; lower f_T (250MHz); higher V_CE(sat)	Choose only for non-critical matching applications where gain ratio suffices and bandwidth is not limiting

Compared with DMT3904W-7 and BCM847DS,115, the DMMT3904W-7 provides tighter V_BE matching (2mV vs. unspecified) and higher f_T, making it optimal for precision DC-coupled circuits where offset and bandwidth jointly constrain performance.

Availability

DMMT3904W-7 is available at Aetrix Electronics and suitable for current mirror circuits, differential amplifiers, voltage comparators, and active load circuits requiring stable component supply and consistent matching performance across production lots.

Supply support for DMMT3904W-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 components for industrial, automotive, and computing applications.

The DMMT3904W-7 belongs to Diodes' precision matched transistor product line, engineered specifically for analog signal conditioning systems demanding minimal parametric drift and intrinsic thermal correlation.

FAQ

What is the maximum continuous collector current per transistor in the DMMT3904W-7?

The DMMT3904W-7 supports 200mA I_C per transistor under ambient conditions (T_A = 25°C) with proper PCB thermal relief. Derating is required above 25°C per the R_θJA = 625°C/W specification; at 70°C ambient, max I_C drops to ~140mA to stay within 200mW total power limit.

How is matching verified between the two transistors?

Matching is verified at wafer level using adjacent die from the same process run, with electrical testing at I_C = 2mA, V_CE = 5V. h_FE ratio and |V_BE1 − V_BE2| are measured directly during final test; data sheets guarantee ≤2% and ≤2mV respectively, with typical values tighter.

Can the DMMT3904W-7 be used in automotive applications?

The automotive-qualified version is DMMT3904WQ (AEC-Q101 qualified), not the standard DMMT3904W-7. While the base design shares identical silicon and matching characteristics, the -7 variant lacks automotive qualification documentation, stress test records, and extended temperature screening-making it unsuitable for safety-critical automotive use.

What is the thermal resistance from junction to ambient for this device?

R_θJA is 625°C/W when mounted on a minimum recommended pad layout (1oz copper, single-sided 1.6mm FR-4 PCB) under still-air conditions. This value assumes steady-state operation and excludes board-level thermal enhancements like thermal vias or copper pours.

DMMT3904W-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-TSSOP, SC-88, SOT-363

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Transistor Type:: 2 NPN (Dual) Matched Pair

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:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-363

DMMT3904W-7 FAQ

1.How can I place an order for DMMT3904W-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DMMT3904W-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 DMMT3904W-7 reliable?

The price and inventory of DMMT3904W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMMT3904W-7 is usually 5 days.

3.What payment methods are accepted for DMMT3904W-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMMT3904W-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DMMT3904W-7?

DMMT3904W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DMMT3904W-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 DMMT3904W-7?

For technical support, including DMMT3904W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMMT3904W-7 requirements.

6.How does Aetrix verify that DMMT3904W-7 is sourced from the original manufacturer or authorized distributors?

All DMMT3904W-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 DMMT3904W-7 meets industry standards.

7.What is the process for return or replacement of DMMT3904W-7?

All DMMT3904W-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMMT3904W-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 DMMT3904W-7 part is unused and in its original packaging.

Return procedure for DMMT3904W-7:

1.Submit a request within 90 days.

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

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