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onsemi PACDN044-LF
- Part No.:
- PACDN044-LF
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PACDN044-LF.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR ARR
- Quantity:
- Payment:
- Shipping:
Inventory:6,424
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Product details
Overview
PACDN044-LF from onsemi is a 5-pin ESD protection diode array designed for high-level transient suppression on interface lines. It delivers ±20 kV IEC 61000-4-2 contact ESD protection, 6.1 V reverse stand-off voltage, 30 pF capacitance at 2.5 VDC/1 MHz, and clamps to ≤6.8 V (positive) / ≥−0.8 V (negative) at 10 mA. It safeguards USB, serial, and IEEE1394 ports in space-constrained consumer and industrial electronics.
For engineers reviewing the PACDN044-LF datasheet, pinout, applications, or equivalent options, key selection criteria include its 5-pin SOT-23-5 package, low clamping voltage under ESD stress, sub-100 nA leakage at 5 V, and compatibility with high-speed data lines requiring minimal signal distortion.
Technical Context
The PACDN044-LF integrates five bidirectional ESD protection diodes in a single monolithic structure, with all cathodes connected to signal pins and a common anode tied to GND. Its architecture enables simultaneous protection of four data lines plus one dedicated ground return path, supporting full compliance with IEC 61000-4-2 Level 4 (±8 kV contact) and MIL-STD-883H HBM (±30 kV).
It operates across −40 °C to +85 °C and features low dynamic resistance (1.0 Ω forward, 1.4 Ω reverse), enabling rapid energy diversion during transients. The device uses silicon avalanche diode technology optimized for fast response (<1 ns) and stable clamping performance over temperature and lifetime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±20 kV contact discharge per IEC 61000-4-2 - ensures robust immunity against real-world handling ESD events without latch-up or degradation. |
| Reverse Stand-off Voltage | 6.1 V at 1 mA - defines maximum continuous operating voltage before conduction begins; compatible with 5 V logic and USB signaling. |
| Clamp Voltage | ≤6.8 V (positive), ≥−0.8 V (negative) at 10 mA - limits peak transient voltage seen by downstream ICs to safe levels during ESD strikes. |
| Capacitance | 30 pF at 2.5 VDC/1 MHz - low enough to avoid signal integrity issues on USB 2.0 and other <480 Mbps interfaces. |
| Leakage Current | ≤100 nA at 5.0 VDC - minimizes standby power loss and prevents false triggering in high-impedance circuits. |
| Operating Temp | −40 °C to +85 °C - supports deployment in industrial control panels, automotive infotainment head units, and portable medical devices. |
Pinout & Package
SOT-23-5 (Case 527AH), 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | ESD protection node for first signal line (e.g., USB D+); connects to protected trace, not IC I/O directly. |
| 2 | GND | Common anode reference; must be low-inductance connection to system ground plane for effective clamping. |
| 3 | Cathode | ESD protection node for second signal line (e.g., USB D−); independent clamping path from Pin 1. |
| 4 | Cathode | ESD protection node for third signal line (e.g., VBUS sense or auxiliary control); shares GND with Pins 1–3. |
| 5 | Cathode | ESD protection node for fourth signal line (e.g., ID pin or sideband use); completes 4-channel protection set. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 Level 4 Compliance | Guarantees survivability against ±8 kV contact and ±15 kV air discharge - meets industrial and commercial EMI immunity requirements. |
| Low Capacitance (30 pF) | Preserves signal edge rate and eye diagram integrity on high-speed digital interfaces up to 480 Mbps without added termination. |
| Compact SOT-23-5 Footprint | Reduces PCB area by >40% vs. discrete diode solutions - critical for ultra-thin mobile accessories and miniaturized docking stations. |
| ±30 kV HBM Protection | Enables safe handling during assembly and rework without special ESD workstations - lowers manufacturing defect rates. |
| Pb-Free & RoHS Compliant | Meets global environmental regulations and supports lead-free reflow profiles (J-STD-020, peak 260 °C). |
Applications
| USB 2.0 Port Protection | Industrial Serial Interface |
|---|---|
Use Scenario: Protecting upstream/downstream USB 2.0 connectors on embedded host controllers or peripheral devices exposed to frequent plugging/unplugging. IC Role / Device Role / Timing Role: ESD transient suppressor placed between connector and USB PHY IC; no timing function - purely fail-safe voltage clamp. Use Value: Prevents permanent damage to USB transceivers during ±20 kV human-body ESD events while adding only 30 pF loading to D+/D− lines. | Use Scenario: Shielding RS-232/RS-485 transceiver pins on programmable logic controllers (PLCs) mounted in factory-floor enclosures. IC Role / Device Role / Timing Role: Front-end surge protector for differential and single-ended communication lines; operates outside signal timing path. Use Value: Eliminates need for external TVS arrays, reducing BOM count and layout complexity while maintaining >10 kV system-level ESD immunity. |
| IEEE 1394 (FireWire) Interface | Consumer Docking Station |
Use Scenario: Safeguarding FireWire 400/800 ports on audio/video editing workstations subject to repeated cable insertion cycles. IC Role / Device Role / Timing Role: Bidirectional clamping element for TPB/TPA data pairs and power detection lines; zero propagation delay. Use Value: Maintains FireWire's 400/800 Mbps data integrity by limiting transient overshoot to <7 V, avoiding receiver saturation or protocol errors. | Use Scenario: Integrated ESD protection in multi-port laptop docking stations supporting HDMI, USB-C, and audio jacks. IC Role / Device Role / Timing Role: Consolidated protection for four independent high-speed signal paths using single 5-pin package. Use Value: Enables 40% smaller PCB real estate vs. dual-SOT-23-3 implementation - essential for thermally constrained aluminum chassis designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | 4-channel, 0.5-pF typical capacitance, 5.5-V stand-off, SC70-6 package | Better suited for USB 3.0/PCIe where <1 pF loading is mandatory; lower voltage rating limits 5 V rail use | Select when protecting >1 Gbps interfaces with strict capacitance budget; not drop-in for PACDN044-LF's 5-pin footprint. |
| ESDALC6V1-1U2 | 4-channel, 0.8-pF capacitance, 6.1-V stand-off, SOT-23-5 package, AEC-Q200 qualified | Automotive-grade qualification adds thermal cycling and humidity resistance; identical pinout but higher cost | Choose for automotive infotainment or ADAS camera links requiring extended reliability validation; same PCB layout as PACDN044-LF. |
Compared with TPD2E001DRYR and ESDALC6V1-1U2, PACDN044-LF offers optimal balance of 30 pF capacitance, 6.1 V stand-off, and industrial-grade ESD robustness in a cost-effective SOT-23-5 package - making it ideal for high-volume USB 2.0 and serial port protection where automotive qualification is unnecessary.
Availability
PACDN044-LF is available at Aetrix Electronics and suitable for USB port protection, industrial serial interface hardening, and IEEE 1394 interface safeguarding requiring stable component supply across production lifecycles.
Supply support for PACDN044-LF 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The PACDN044-LF belongs to onsemi's ESD protection diode family engineered specifically for board-level I/O hardening - emphasizing low clamping voltage, high ESD tolerance, and minimal signal-line capacitance in compact surface-mount packages.
FAQ
What is the maximum ESD voltage PACDN044-LF can withstand per IEC 61000-4-2?
PACDN044-LF withstands ±20 kV contact discharge per IEC 61000-4-2, verified using the standard test method with one channel pin stressed at a time while all GND pins are grounded and other channel pins left open. This exceeds Level 4 (±8 kV contact) by more than double, ensuring margin for field reliability.
Does PACDN044-LF support bidirectional signal lines like USB D+ and D−?
Yes, PACDN044-LF provides true bidirectional ESD protection via integrated back-to-back diode pairs. Each cathode pin (Pins 1, 3, 4, 5) forms a symmetrical clamp to GND (Pin 2), enabling protection of AC-coupled or differential signals such as USB 2.0 D+ and D− without polarity constraints.
What is the leakage current specification for PACDN044-LF at 5 V operating voltage?
PACDN044-LF exhibits ≤100 nA leakage current at 5.0 VDC and 25 °C, with typical value of 1 nA. This ultra-low leakage prevents unintended current draw in battery-powered devices and avoids interference with high-impedance analog monitoring circuits connected to protected lines.
Can PACDN044-LF be used to protect HDMI or DisplayPort interfaces?
No - PACDN044-LF's 30 pF capacitance is too high for HDMI 2.0 (max ~1.5 pF) or DisplayPort 1.4 (max ~0.5 pF) signal integrity requirements. It is validated for USB 2.0, RS-232, and IEEE 1394, where 30 pF introduces negligible jitter or attenuation below 480 Mbps.
Is PACDN044-LF pin-compatible with other members of the PACDN042–046 family?
No - PACDN044-LF uses the 5-pin SOT-23-5 package (Case 527AH), whereas PACDN042 is 3-pin, PACDN043 is 4-pin SOT-143, PACDN045 is 6-pin, and PACDN046 is 8-pin MSOP. Pin count, pinout, and package dimensions differ across the family; PCB layout must be specific to PACDN044-LF.
PACDN044-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.1V (Min)
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 30pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
PACDN044-LF FAQ
1.How can I place an order for PACDN044-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for PACDN044-LF 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 PACDN044-LF reliable?
The price and inventory of PACDN044-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PACDN044-LF is usually 5 days.
3.What payment methods are accepted for PACDN044-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PACDN044-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PACDN044-LF?
PACDN044-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PACDN044-LF 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 PACDN044-LF?
For technical support, including PACDN044-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PACDN044-LF requirements.
6.How does Aetrix verify that PACDN044-LF is sourced from the original manufacturer or authorized distributors?
All PACDN044-LF 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 PACDN044-LF meets industry standards.
7.What is the process for return or replacement of PACDN044-LF?
All PACDN044-LF units undergo pre-shipment inspection (PSI). If there is an issue with PACDN044-LF, 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 PACDN044-LF part is unused and in its original packaging.
Return procedure for PACDN044-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PACDN044-LF Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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