My Inquiry
My Account
Diodes Incorporated MMDT3946LP4-7
- Part No.:
- MMDT3946LP4-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-SMD, No Lead
- Datasheet:
-
MMDT3946LP4-7.pdf
- Description:
- TRANS NPN/PNP 40V DFN1310H4-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,046
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMDT3946LP4-7 from Diodes Incorporated is a complementary NPN/PNP surface-mount transistor pair integrating one 2N3904-type NPN and one 2N3906-type PNP in a single DFN1310H4-6 package. It delivers VCEO = 40 V (NPN) / −40 V (PNP), IC = ±200 mA continuous, PD = 200 mW total, and fT = 300 MHz (NPN) / 250 MHz (PNP), enabling compact dual-polarity switching in low-voltage logic interface and signal inversion circuits.
For engineers reviewing the MMDT3946LP4-7 datasheet, MMDT3946LP4-7 pinout, MMDT3946LP4-7 application, or MMDT3946LP4-7 equivalent, key selection criteria include verified complementary gain matching (hFE = 40–300 for both sections), symmetric saturation voltages (VCE(SAT) ≤ 0.3 V / −0.4 V), and DFN1310H4-6 thermal performance (RθJA = 625 °C/W).
Technical Context
This dual-transistor device implements two discrete epitaxial planar die structures - one NPN (3904-section) and one PNP (3906-section) - sharing a common leadframe within a single molded plastic DFN package. Each section operates independently with fully specified DC, small-signal, and switching parameters across temperature.
The NPN section provides higher fT (300 MHz vs. 250 MHz) and lower |VCE(SAT)| at 10 mA (0.20 V vs. −0.25 V), while the PNP section exhibits tighter hFE spread at low current (60–300 at IC = −100 µA). Both sections share identical thermal resistance and moisture sensitivity (Level 1 per J-STD-020C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | NPN: 40 V; PNP: −40 V - supports rail-to-rail switching in ±5 V to ±15 V logic-level applications |
| IC (continuous) | ±200 mA - enables direct drive of LEDs, small relays, or gate loads without external buffering |
| PD (total) | 200 mW - limits simultaneous high-current operation of both transistors on FR-4 PCB |
| fT | NPN: 300 MHz; PNP: 250 MHz - suitable for audio-frequency amplification and digital signal edge shaping up to ~50 MHz |
| VCE(SAT) | NPN: ≤ 0.30 V @ 50 mA; PNP: ≥ −0.40 V @ −50 mA - ensures low conduction loss in push-pull output stages |
| hFE | NPN: 40–300; PNP: 60–300 (IC = 100 µA to 100 mA) - allows predictable biasing across wide current range |
| RθJA | 625 °C/W - requires minimal copper area for thermal management in space-constrained layouts |
Pinout & Package
Package: DFN1310H4-6, 1.30 mm × 1.00 mm × 0.40 mm body, 0.40 mm maximum height, NiPdAu-plated terminals, RoHS-compliant "Green" molding compound (UL 94V-0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E1) | PNP Emitter | Common emitter node for PNP section; connects to positive supply in high-side switch configuration |
| 2 (B1) | PNP Base | Control input for PNP; requires current-limiting resistor when driven from 3.3/5 V logic |
| 3 (C1) | PNP Collector | Output node for PNP; sinks current when active; ties to load return path |
| 4 (C2) | NPN Collector | Output node for NPN; sources current when active; connects to load anode or VCC |
| 5 (B2) | NPN Base | Control input for NPN; compatible with standard TTL/CMOS logic levels |
| 6 (E2) | NPN Emitter | Common emitter node for NPN; connects to ground in low-side switch configuration |
Key Features
| Feature | Design Value |
|---|---|
| Complementary NPN/PNP pairing | Single-package integration eliminates layout mismatch and improves thermal tracking between sections |
| Epitaxial planar die construction | Ensures stable hFE, low leakage (ICEX ≤ ±50 nA), and repeatable VBE(SAT) across production lots |
| DFN1310H4-6 footprint | Reduces board area by >60% versus SO-8 or SOT-363 equivalents while maintaining solder joint reliability |
| Lead-free & RoHS-compliant | Meets IPC-J-STD-020C Level 1 moisture sensitivity and MIL-STD-202 solderability requirements |
Applications
| LED Driver Circuit | Logic-Level Translator |
|---|---|
Use Scenario: Driving dual-color (red/green) LED indicators from a single microcontroller GPIO pin using complementary switching. IC Role / Device Role / Timing Role: NPN switches LED cathode to ground; PNP switches LED anode to VCC; enables bidirectional current control without external inverters. Use Value: Eliminates need for separate NPN+PNP discrete placement, reducing BOM count and routing complexity in indicator subsystems. | Use Scenario: Converting 1.8 V logic outputs to 3.3 V or 5 V levels for legacy peripherals. IC Role / Device Role / Timing Role: Configured as emitter-follower level shifter with NPN sourcing and PNP sinking capability. Use Value: Achieves <10 ns propagation delay and sub-0.5 V output swing error due to matched VBE characteristics. |
| Push-Pull Output Stage | Low-Power Oscillator Core |
Use Scenario: Building Class-B audio preamplifier output or clock buffer stage in portable instrumentation. IC Role / Device Role / Timing Role: NPN and PNP operate in anti-phase to deliver symmetrical sourcing/sinking current into resistive or capacitive loads. Use Value: Delivers <1% crossover distortion at 10 kHz due to closely matched hFE and VCE(SAT) across sections. | Use Scenario: Implementing relaxation oscillator or astable multivibrator in battery-powered sensor nodes. IC Role / Device Role / Timing Role: Cross-coupled NPN/PNP pair forms regenerative feedback loop with RC timing network. Use Value: Enables stable oscillation from 10 kHz to 1 MHz with <±3% frequency drift over −40°C to +85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar complementary transistor pair applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMC3026LSD-7 | Same DFN1310H4-6 package; NPN hFE min = 100 (vs. 40), PNP hFE min = 100; VCEO = ±60 V | Higher voltage rating suits 24 V industrial I/O; tighter hFE spec eases bias design | Select when >40 V breakdown or guaranteed minimum gain is required |
| NSVT3946MUTBG | Same pinout; SOT-363 package; RθJA = 300 °C/W (vs. 625 °C/W); PD = 300 mW | Higher power dissipation but larger footprint; less thermally constrained on thin PCBs | Select when thermal margin is critical and board area permits SOT-363 |
Compared with DMC3026LSD-7 and NSVT3946MUTBG, MMDT3946LP4-7 offers optimal balance of ultra-compact size, verified gain symmetry, and cost-effective RoHS compliance for consumer and portable electronics where 40 V operation suffices.
Availability
MMDT3946LP4-7 is available at Aetrix Electronics and suitable for LED driver circuits, logic-level translators, push-pull output stages, and low-power oscillator cores requiring stable component supply and consistent parametric matching.
Supply support for MMDT3946LP4-7 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 power management, signal integrity, and protection applications.
The MMDT3946LP4-7 belongs to Diodes' complementary transistor portfolio, designed specifically for space-constrained, dual-polarity switching in portable and battery-powered systems where footprint, thermal efficiency, and process compatibility are critical.
FAQ
What is the maximum junction temperature for MMDT3946LP4-7?
The absolute maximum junction temperature is 150°C, derived from the rated maximum ambient temperature of 125°C and thermal resistance RθJA = 625 °C/W at 200 mW total dissipation. Derating curves in Figure 1 confirm safe operation up to 125°C ambient when power is limited to 150 mW.
Can MMDT3946LP4-7 be used in linear amplifier configurations?
Yes - both sections exhibit stable hFE across collector currents from 100 µA to 100 mA and low VCE(SAT) at moderate loads, supporting Class-A and Class-AB operation. However, its 200 mW total power limit restricts use to low-power preamplifier or headphone driver stages.
How are the NPN and PNP sections electrically isolated inside the DFN package?
The NPN and PNP die are physically separate epitaxial planar structures mounted on a common leadframe. They share no internal electrical connection - isolation is maintained by the mold compound and die attach material, with typical inter-section leakage <1 nA at 30 V bias per datasheet test conditions.
Is the marking code "46" sufficient to identify MMDT3946LP4-7 on the device body?
Yes - per page 4 of the datasheet, "46" is the official product type marking code for MMDT3946LP devices. The full part number is encoded in tape-and-reel packaging labels; the top-side marking confirms correct family and process revision for automated optical inspection.
MMDT3946LP4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-SMD, No Lead
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 1 NPN, 1 PNP
- Current - Collector (Ic) (Max):
- 200mA
- Voltage - Collector Emitter Breakdown (Max):
- 40V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 50mA / 400mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 1V
- Power - Max:
- 200mW
- Frequency - Transition:
- 300MHz, 250MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1310H4-6
MMDT3946LP4-7 FAQ
1.How can I place an order for MMDT3946LP4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMDT3946LP4-7 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 MMDT3946LP4-7 reliable?
The price and inventory of MMDT3946LP4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMDT3946LP4-7 is usually 5 days.
3.What payment methods are accepted for MMDT3946LP4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMDT3946LP4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMDT3946LP4-7?
MMDT3946LP4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMDT3946LP4-7 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 MMDT3946LP4-7?
For technical support, including MMDT3946LP4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMDT3946LP4-7 requirements.
6.How does Aetrix verify that MMDT3946LP4-7 is sourced from the original manufacturer or authorized distributors?
All MMDT3946LP4-7 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 MMDT3946LP4-7 meets industry standards.
7.What is the process for return or replacement of MMDT3946LP4-7?
All MMDT3946LP4-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMDT3946LP4-7, 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 MMDT3946LP4-7 part is unused and in its original packaging.
Return procedure for MMDT3946LP4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMDT3946LP4-7 Tags
-
MBT3946DW1T1G
onsemi
-
BC846BPDW1T1G
onsemi
-
MBT2222ADW1T1G
onsemi
-
BC847BDW1T1G
onsemi
-
DMMT5401-7-F
Diodes Incorporated
-
DMMT5551-7-F
Diodes Incorporated
-
DMMT3904W-7-F
Diodes Incorporated
-
DMMT3906W-7-F
Diodes Incorporated
-
FMB3904
onsemi
-
FMB2222A
onsemi
-
ULQ2003D1013TR
STMicroelectronics
-
ZXTD4591E6TA
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
