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Diodes Incorporated MMBD4448HTA-7
- Part No.:
- MMBD4448HTA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- -
- Datasheet:
-
MMBD4448HTA-7.pdf
- Description:
- DIODE ARRAY GP 80V 250MA SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:1
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Product details
Overview
MMBD4448HTA-7 from Diodes Incorporated is a surface-mount fast-switching silicon switching diode in SOT523 package, rated for 80 V peak repetitive reverse voltage, 500 mA forward current, and 4.0 ns reverse recovery time. It delivers high conductance with VF = 0.62 V at IF = 5 mA and low junction capacitance (CT = 3.5 pF at VR = 6 V), used in high-speed signal routing and clamp protection circuits in portable power management.
For engineers reviewing the MMBD4448HTA-7 datasheet, MMBD4448HTA-7 pinout, MMBD4448HTA-7 application, or MMBD4448HTA-7 equivalent, key selection criteria include reverse recovery speed, low forward voltage at low currents, thermal resistance (RθJA = 833 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant green packaging for space-constrained consumer and industrial PCBs.
Technical Context
This diode operates as a unidirectional, single-element PN junction device optimized for high-frequency switching up to ~100 MHz, leveraging low CT and fast trr to minimize switching losses in flyback snubbers and logic-level clamping. Its ultra-small SOT523 footprint supports dense layout in battery-powered devices where thermal mass is limited.
The device uses alloy 42 leadframe with matte tin plating, rated for moisture sensitivity level 1 (J-STD-020), and features halogen/antimony-free molding compound (UL 94V-0). Polarity is marked with cathode band; maximum power dissipation is derated linearly above 25 °C ambient per Fig. 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM / VRRM | 100 V / 80 V - supports transient suppression up to 100 V non-repetitive, safe DC blocking to 80 V in continuous operation |
| IFM | 500 mA - enables use in moderate-current signal path switching without thermal runaway on FR-4 |
| trr | 4.0 ns - ensures minimal switching delay and reduced ringing in >10 MHz digital or PWM edge detection |
| VF @ 5 mA | 0.62 V - lowers conduction loss in low-power bias networks and level-shifting interfaces |
| CT @ 6 V | 3.5 pF - minimizes capacitive loading on high-impedance nodes like oscillator feedback paths |
| RθJA | 833 °C/W - requires careful thermal pad design for sustained >100 mW operation in enclosed environments |
Pinout & Package
Package: SOT523 - ultra-compact 3-pin surface-mount plastic package (1.60 × 1.60 × 0.75 mm), lead-free, halogen-free, UL 94V-0 rated, weight ≈ 0.002 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry | Connected to lower-potential node in clamping or rectification; polarity confirmed by top-side marking "A6" and cathode band on Pin 2 |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Serves as reference node for voltage clamping; must be tied to stable rail or signal return to enable bidirectional protection |
| No Connect (Pin 3) | Internal die attach pad (non-functional) | Electrically isolated; may be left floating or grounded for mechanical stability-no electrical role in circuit operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast switching | trr = 4.0 ns enables clean edge transitions in 25–100 MHz clock distribution and data line termination |
| Low forward voltage | VF ≤ 0.72 V at IF = 10 mA reduces voltage drop in bias networks for RF amplifiers and sensor interfaces |
| High conductance | Low dynamic resistance improves efficiency in low-voltage (<3.3 V) logic-level clamping applications |
| Green packaging | Halogen/antimony-free compound meets automotive and medical regulatory requirements without compromising mold integrity |
Applications
| USB Data Line Protection | High-Speed Logic Clamp |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines from ESD and overvoltage transients during hot-plug events. IC Role / Device Role / Timing Role: Fast clamping diode shunting surge current to VBUS or GND before IC input structures are stressed. Use Value: 4.0 ns trr ensures clamping activation within one USB packet edge (≈ 20 ns), preventing bit errors. | Use Scenario: Level-shifting and overvoltage clamping between 1.8 V FPGA I/O and 3.3 V peripheral logic. IC Role / Device Role / Timing Role: Bidirectional voltage limiter referenced to dual rails, limiting swing to safe IO thresholds. Use Value: Low CT (3.5 pF) avoids signal degradation on 50 MHz control buses; VF < 0.72 V maintains logic margin. |
| Portable DC-DC Feedback Snubber | RF Signal Path Isolation |
Use Scenario: Suppressing flyback voltage spikes across synchronous buck converter high-side MOSFET gate drivers. IC Role / Device Role / Timing Role: Fast freewheeling path absorbing inductive kickback during MOSFET turn-off. Use Value: 80 V VRRM withstands typical 5–12 V supply transients; 500 mA IFM handles peak gate charge current. | Use Scenario: Isolating LO injection leakage in 2.4 GHz Wi-Fi front-end switch modules. IC Role / Device Role / Timing Role: RF-blocking diode in series with antenna path, biased off during transmit mode. Use Value: 3.5 pF CT minimizes insertion loss below –1 dB at 2.4 GHz; low VF ensures minimal DC bias drift. |
Availability
MMBD4448HTA-7 is available at Aetrix Electronics and suitable for USB interface protection, high-speed logic clamping, DC-DC feedback snubbing, and RF signal path isolation requiring stable component supply across production ramps and long-lifecycle designs.
Supply support for MMBD4448HTA-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, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to Diodes' general-purpose fast-switching diode product line, engineered specifically for high-frequency signal integrity, compact board space, and compliance-critical applications in consumer, computing, and industrial electronics.
FAQ
What is the cathode identification method for MMBD4448HTA-7?
The cathode is identified by a visible band adjacent to Pin 2 on the top surface of the SOT523 package. The device marking "A6" appears near the cathode end, and the pinout diagram in DS30263 Rev. 14-2 confirms Pin 2 as cathode. Polarity must be verified before placement to avoid reverse-bias failure.
Can MMBD4448HTA-7 replace MMBD4448HT in existing designs?
Yes - MMBD4448HTA-7 is a direct replacement for MMBD4448HT, sharing identical electrical specs, SOT523 package, and pinout. The "A" suffix denotes a different wafer lot or test flow per Diodes' internal tracking; no functional or reliability differences exist between HT and HTA variants.
Is MMBD4448HTA-7 qualified for automotive applications?
No - MMBD4448HTA-7 is not AEC-Q101 qualified. Diodes offers the MMBD4448Q-7 (AEC-Q101 Grade 1) for automotive use. This part lacks PPAP documentation, IATF 16949-controlled process records, and high-temp reliability testing required for under-hood deployment.
What is the recommended PCB pad layout for thermal performance?
Diodes specifies a copper pad layout with X = 0.40 mm, X1 = 0.70 mm, Y = 0.51 mm, Y1 = 1.80 mm, and C = 1.29 mm (all in mm), per DS30263 page 5. Use minimum 0.5 oz copper with thermal relief traces; avoid excessive solder mask coverage on thermal pads to maintain RθJA ≤ 833 °C/W.
MMBD4448HTA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Diode Configuration:
- -
- Technology:
- -
- Voltage - DC Reverse (Vr) (Max):
- -
- Current - Average Rectified (Io) (per Diode):
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- -
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- -
- Operating Temperature - Junction:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBD4448HTA-7 FAQ
1.How can I place an order for MMBD4448HTA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD4448HTA-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 MMBD4448HTA-7 reliable?
The price and inventory of MMBD4448HTA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBD4448HTA-7 is usually 5 days.
3.What payment methods are accepted for MMBD4448HTA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4448HTA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD4448HTA-7?
MMBD4448HTA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD4448HTA-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 MMBD4448HTA-7?
For technical support, including MMBD4448HTA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4448HTA-7 requirements.
6.How does Aetrix verify that MMBD4448HTA-7 is sourced from the original manufacturer or authorized distributors?
All MMBD4448HTA-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 MMBD4448HTA-7 meets industry standards.
7.What is the process for return or replacement of MMBD4448HTA-7?
All MMBD4448HTA-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4448HTA-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 MMBD4448HTA-7 part is unused and in its original packaging.
Return procedure for MMBD4448HTA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBD4448HTA-7 Tags
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BAV99-7-F
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