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Diodes Incorporated MMBD4448HCQW-7-F
- Part No.:
- MMBD4448HCQW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MMBD4448HCQW-7-F.pdf
- Description:
- DIODE ARRAY GP 80V 250MA SOT-353
- Quantity:
- Payment:
- Shipping:
Inventory:28,062
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Product details
Overview
MMBD4448HCQW-7-F from Diodes Incorporated is a surface-mount fast-switching dual diode array in SOT353 package, configured as two independent high-speed switching diodes. It delivers 100V non-repetitive peak reverse voltage, 4ns maximum reverse recovery time, and 0.72V max forward voltage at 5mA - enabling use in high-frequency signal routing, clamping, and logic-level translation circuits.
For engineers reviewing the MMBD4448HCQW-7-F datasheet, MMBD4448HCQW-7-F pinout, MMBD4448HCQW-7-F application, or MMBD4448HCQW-7-F equivalent, key selection criteria include low capacitance (3.5pF), AEC-Q101 qualification of related variants, automotive-grade traceability, and compatibility with 5V/3.3V logic interface protection schemes.
Technical Context
This dual diode array operates as two isolated, monolithically integrated silicon switching diodes sharing no internal connection. Each element supports continuous forward current up to 500mA and withstands 80V repetitive reverse voltage, with thermal resistance of 625°C/W under standard FR-4 mounting conditions.
Its 4ns reverse recovery time and 3.5pF junction capacitance are measured at 6V reverse bias and 1MHz, making it suitable for <100MHz digital signal conditioning and ESD-tolerant input stage protection where minimal signal distortion and fast transient response are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Package | SOT353 - 5-pin compact surface-mount outline with 0.65mm lead pitch, optimized for high-density PCB layouts. |
| VRM / VRRM | 100V / 80V - Enables safe operation in 48V industrial bus interfaces and 24V automotive subsystems with margin. |
| trr | 4.0ns max - Supports clean switching in 10–50MHz clock distribution, sample-and-hold, and pulse shaping circuits. |
| VF @ 5mA | 0.72V max - Minimizes voltage drop in low-power logic clamping and level-shifting paths without active biasing. |
| IR @ 70V | 100nA max - Ensures negligible leakage in precision analog front-ends and battery-backed signal monitoring nodes. |
| CT @ 6V | 3.5pF max - Reduces capacitive loading on high-impedance nodes such as RF detector inputs and ADC reference buffers. |
Pinout & Package
SOT353 package: 5-terminal plastic molded case with exposed thermal pad not connected internally; terminals are matte tin-plated alloy 42 leads, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode 1 | Input node for forward conduction path in first diode element; connects to signal source or pull-up network. |
| 2 | Cathode of Diode 1 | Output node for Diode 1; ties to load, logic gate input, or clamp reference point. |
| 3 | No Connect (NC) | Internally unconnected terminal; must remain floating or grounded per layout best practice to avoid parasitic coupling. |
| 4 | Anode of Diode 2 | Independent forward path for second signal channel; enables dual-rail clamping or redundant protection. |
| 5 | Cathode of Diode 2 | Second output node; allows asynchronous or differential clamping without shared cathode impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4ns trr enables reliable operation in >25MHz digital signal paths without tail current distortion. |
| Low forward voltage | 0.72V max at 5mA reduces power loss and thermal rise in always-on protection circuits. |
| Low reverse leakage | 100nA max at 70V preserves accuracy in high-impedance sensor bias networks and reference dividers. |
| Low junction capacitance | 3.5pF max minimizes signal attenuation and phase shift in RF detector and high-speed comparator inputs. |
Applications
| Logic-Level Translation | Digital Signal Clamping |
|---|---|
Use Scenario: Bidirectional level shifting between 3.3V microcontroller I/O and 5V peripheral interfaces using passive diode-based translators. IC Role / Device Role / Timing Role: Dual diode provides asymmetric forward conduction paths to enforce voltage thresholds while blocking reverse current. Use Value: Eliminates need for active translators; maintains signal integrity up to 20MHz with sub-1ns edge preservation. |
Use Scenario: Protecting FPGA configuration pins from overvoltage transients during hot-plug insertion or ESD events. IC Role / Device Role / Timing Role: Fast clamping diode shunts excess voltage to VCC or GND rails before damage threshold is exceeded. Use Value: 4ns recovery ensures clamping action completes within first 10% of a 100MHz clock cycle, preventing metastability. |
| RF Detector Input Protection | High-Speed Sample-and-Hold Front-End |
Use Scenario: Shielding logarithmic amplifier inputs in GSM/UMTS receiver chains from antenna-coupled RF bursts. IC Role / Device Role / Timing Role: Low-capacitance diode pair limits RF ingress while preserving detector DC operating point. Use Value: 3.5pF capacitance avoids detuning 900MHz matching networks; leakage below 100nA prevents offset drift. |
Use Scenario: Isolating analog multiplexer outputs from hold capacitor during acquisition phase in multi-channel data loggers. IC Role / Device Role / Timing Role: Dual diode blocks backfeed from adjacent channels and suppresses charge injection kickback. Use Value: Independent anode/cathode terminals prevent crosstalk; 500mA IF rating handles transient surge during switch bounce. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54CWS-7-F | Single-pair Schottky diode in SOT323; VF = 0.32V @ 10mA but VR = 30V max and trr not specified. | Lower VF benefits low-voltage rail clamping; insufficient for 70V+ reverse stress in industrial IO protection. | Select when forward loss dominates design priority and reverse voltage stays below 30V. |
| MMBD4148-7-F | Single diode in SOT23; identical trr (4ns) and VR (100V), but no dual-element integration or NC pin isolation. | Requires two devices for dual-path function; increases board area and solder joint count vs. single SOT353 footprint. | Choose when space permits discrete placement and dual-channel timing correlation is not required. |
Compared with BAT54CWS-7-F and MMBD4148-7-F, MMBD4448HCQW-7-F uniquely combines dual-channel isolation, 80V working reverse voltage, and 4ns recovery in a 5-pin SOT353 - delivering higher functional density and system-level reliability for multi-rail interface protection.
Availability
MMBD4448HCQW-7-F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control unit signal conditioning, and medical patient-monitoring front-end protection requiring stable component supply across extended product lifecycles.
Supply support for MMBD4448HCQW-7-F 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 the Americas.
This device belongs to Diodes' high-speed switching diode product line, engineered specifically for signal integrity preservation in digital interface protection, logic translation, and RF front-end conditioning applications.
FAQ
What is the maximum junction temperature for MMBD4448HCQW-7-F?
The device is rated for operation from –55°C to +150°C junction temperature. At ambient temperatures above 25°C, derating applies: power dissipation must be reduced linearly beyond 200mW using the 625°C/W thermal resistance value and the curve in Figure 1 of the datasheet.
Is MMBD4448HCQW-7-F qualified for automotive applications?
MMBD4448HCQW-7-F itself is not AEC-Q101 qualified; however, the pin-compatible MMBD4448HADWQ-7-F variant (SOT363) is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949-certified facilities - intended for automotive use cases requiring change control and traceability.
How does the NC pin (Pin 3) affect PCB layout?
Pin 3 is internally unconnected and must not be tied to any net. In layout, it may be left floating or grounded to reduce noise coupling; grounding requires a dedicated via to solid ground plane with minimal loop area to avoid introducing unintended antenna effects in RF-sensitive designs.
Can this diode array replace a single BAT54SW in clamping applications?
No - BAT54SW is a dual-Schottky configuration with common cathode, whereas MMBD4448HCQW-7-F has independent diodes with one NC pin. The structural difference prevents direct substitution in circuits relying on shared cathode topology, such as certain USB VBUS protection or dual-rail ESD shunt configurations.
MMBD4448HCQW-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 2 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 80 V
- Current - Average Rectified (Io) (per Diode):
- 250mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 150 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 70 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-353
MMBD4448HCQW-7-F FAQ
1.How can I place an order for MMBD4448HCQW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD4448HCQW-7-F 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 MMBD4448HCQW-7-F reliable?
The price and inventory of MMBD4448HCQW-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBD4448HCQW-7-F is usually 5 days.
3.What payment methods are accepted for MMBD4448HCQW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4448HCQW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD4448HCQW-7-F?
MMBD4448HCQW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD4448HCQW-7-F 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 MMBD4448HCQW-7-F?
For technical support, including MMBD4448HCQW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4448HCQW-7-F requirements.
6.How does Aetrix verify that MMBD4448HCQW-7-F is sourced from the original manufacturer or authorized distributors?
All MMBD4448HCQW-7-F 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 MMBD4448HCQW-7-F meets industry standards.
7.What is the process for return or replacement of MMBD4448HCQW-7-F?
All MMBD4448HCQW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4448HCQW-7-F, 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 MMBD4448HCQW-7-F part is unused and in its original packaging.
Return procedure for MMBD4448HCQW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBD4448HCQW-7-F Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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