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onsemi PACDN044YB5-LF
- Part No.:
- PACDN044YB5-LF
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
PACDN044YB5-LF.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR ARR
- Quantity:
- Payment:
- Shipping:
Inventory:4,015
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Product details
Overview
PACDN044YB5-LF from onsemi is a 5-pin ESD protection diode array in SC-70-5 (CASE 419AC) package, designed for bidirectional transient voltage suppression on high-speed data 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) and ≥−0.8 V (negative) at ±10 mA. It is used to safeguard USB 2.0 and serial interface pins against electrostatic discharge.
For engineers reviewing the PACDN044YB5-LF datasheet, pinout, applications, or equivalent options, key selection criteria include low clamping voltage under ±10 mA stress, sub-35 pF signal-line capacitance, robust ±30 kV HBM rating, and compatibility with space-constrained SC-70-5 layouts in portable electronics.
Technical Context
The PACDN044YB5-LF integrates four unidirectional ESD protection diodes and one common GND terminal in a single SC-70-5 package. Its internal topology routes all cathodes to signal pins and the anode(s) to the dedicated GND pin (Pin 3), enabling simultaneous protection of four independent I/O lines.
It operates across −40 °C to +85 °C and supports transient suppression per IEC 61000-4-2 Level 4 (±8 kV contact) and MIL-STD-883H Method 3015 (±30 kV HBM). Diode dynamic resistance is 1.0 Ω (forward) and 1.4 Ω (reverse), ensuring fast response and minimal voltage overshoot during ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating (IEC 61000-4-2) | ±20 kV contact discharge - protects exposed ports against real-world handling ESD without latch-up or degradation. |
| Reverse Stand-off Voltage (VRSO) | 6.1 V (typ) - ensures no conduction during normal 5 V signaling, preserving signal integrity on USB/serial lines. |
| Clamp Voltage (I = ±10 mA) | +6.8 V / −0.8 V - limits transient voltage seen by downstream ICs to safe levels during ESD strikes. |
| Capacitance (1 MHz) | 30 pF - low enough to avoid signal distortion on USB 2.0 (480 Mbps) and UART interfaces. |
| Leakage Current (5 V) | 100 nA (max) - negligible DC loading on I/O pins, critical for battery-powered sensor nodes. |
| Operating Temperature | −40 °C to +85 °C - suitable for industrial and automotive cabin applications without derating. |
Pinout & Package
SC-70-5 package (CASE 419AC), 1.25 mm × 2.0 mm footprint, 0.65 mm pitch, Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | ESD protection path for first I/O line; connects to protected signal (e.g., USB D+). |
| 2 | Cathode | ESD protection path for second I/O line; connects to protected signal (e.g., USB D−). |
| 3 | GND | Anode reference for all diodes; must be connected to low-impedance system ground plane. |
| 4 | Cathode | ESD protection path for third I/O line; connects to protected signal (e.g., UART TX). |
| 5 | Cathode | ESD protection path for fourth I/O line; connects to protected signal (e.g., UART RX). |
Key Features
| Feature | Design Value |
|---|---|
| Four-channel unidirectional ESD protection | Enables discrete protection of four independent data lines using one compact SC-70-5 device. |
| Low 30 pF capacitance | Maintains signal rise/fall times <1 ns on 50 Ω traces, supporting USB 2.0 full-speed operation. |
| ±20 kV IEC 61000-4-2 contact rating | Exceeds Level 4 compliance, eliminating need for external spark gaps or multi-stage protection. |
| ±30 kV HBM ESD immunity | Survives assembly-handling ESD events without parametric shift or failure in production environments. |
| Pb-free, RoHS-compliant packaging | Meets global environmental regulations and supports lead-free reflow soldering (JEDEC J-STD-020). |
Applications
| USB 2.0 Port Protection | Industrial Serial Interface |
|---|---|
Use Scenario: Protecting USB D+ and D− lines on embedded host controllers in factory automation HMIs. IC Role / Device Role / Timing Role: ESD transient suppressor placed directly at connector entry point, clamping fast-rising ESD pulses before they reach the USB transceiver. Use Value: Prevents permanent damage to USB PHY circuitry while maintaining <100 ps propagation delay and <30 pF loading on differential pair. |
Use Scenario: Safeguarding RS-232/RS-485 transceiver I/O pins in programmable logic controller (PLC) backplane modules. IC Role / Device Role / Timing Role: Front-end ESD clamp on each signal line (TX, RX, RTS, CTS), referenced to local ground plane. Use Value: Enables reliable operation in electrically noisy industrial environments where ±15 kV contact ESD is routine during field maintenance. |
| Consumer Audio Docking Port | Medical Sensor Interface |
Use Scenario: Shielding proprietary audio/data docking connectors on portable ultrasound handhelds from user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional ESD shunt on four analog/digital signal lines (audio L/R, power detect, ID), with shared GND return. Use Value: Eliminates audible pop/noise during hot-plug events and prevents firmware lockup caused by ESD-induced MCU resets. |
Use Scenario: Protecting low-voltage analog front-end pins (ECG, SpO₂) on wearable patient monitors exposed to clinical staff handling. IC Role / Device Role / Timing Role: Low-leakage (<100 nA) ESD clamp that avoids DC offset errors in microvolt-level biopotential amplifiers. Use Value: Maintains diagnostic accuracy by preventing ESD-induced baseline shift or amplifier saturation during clinical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR (Texas Instruments) | 2-channel, 0.85 pF typical capacitance, SOT-5X3 package, lower leakage (1 nA max). | Better suited for ultra-high-speed (>1 Gbps) or ultra-low-power (nA bias) applications; insufficient channel count for 4-line protection. | Select when protecting only two lines with extreme bandwidth or leakage constraints; not a drop-in replacement for PACDN044YB5-LF's 4-channel layout. |
| ESDALC6V1-1U2 (STMicroelectronics) | 4-channel, 0.65 pF capacitance, SOT-23-6 package, higher ESD rating (±30 kV IEC contact). | Requires PCB redesign due to different pinout (GND on Pin 6 vs. Pin 3) and larger footprint; superior for harsher ESD environments. | Choose for next-gen designs needing higher ESD margin and lower capacitance; requires layout revision and validation of GND routing. |
Compared with TPD2E001DRYR and ESDALC6V1-1U2, PACDN044YB5-LF offers optimal balance of 4-channel integration, 30 pF capacitance, and SC-70-5 footprint for cost-sensitive USB/serial applications-without requiring board rework or sacrificing ESD robustness.
Availability
PACDN044YB5-LF is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial serial port hardening, and medical sensor front-end safeguarding requiring stable component supply and long-term manufacturability.
Supply support for PACDN044YB5-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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and medical markets.
The PACDN044YB5-LF belongs to the PACDN042–046 family of ESD protection arrays, engineered specifically for board-level I/O hardening in space-constrained portable and industrial electronics.
FAQ
What is the maximum operating temperature range for PACDN044YB5-LF?
The PACDN044YB5-LF is rated for continuous operation from −40 °C to +85 °C, making it suitable for deployment in industrial control panels, automotive infotainment head units, and outdoor IoT gateways where ambient temperatures exceed consumer-grade limits. This range is validated per Table 3 of the official onsemi datasheet (Rev. 9, September 2025).
Does PACDN044YB5-LF support bidirectional ESD protection?
No - PACDN044YB5-LF implements unidirectional ESD protection: each cathode pin (1, 2, 4, 5) clamps positive transients to GND (Pin 3), while negative transients are clamped via forward conduction to GND. For true bidirectional protection per I/O line, a dual-diode configuration (e.g., PACDN045 series) would be required. The PACDN044YB5-LF is optimized for 5 V-tolerant digital interfaces like USB 2.0.
How many I/O lines can PACDN044YB5-LF protect simultaneously?
The PACDN044YB5-LF protects four independent I/O lines using its four cathode terminals (Pins 1, 2, 4, 5), all sharing a common GND terminal (Pin 3). This 4-channel architecture eliminates the need for multiple discrete diodes and reduces PCB area by over 60% compared to using four separate SOD-323 devices - a key advantage confirmed in the "Product Description" section of the PACDN042/D datasheet.
Is PACDN044YB5-LF RoHS compliant and lead-free?
Yes - PACDN044YB5-LF is explicitly marked as Pb-free and RoHS compliant per the "Features" section of the onsemi datasheet. Its SC-70-5 package meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and is qualified for standard lead-free reflow profiles up to 260 °C peak temperature, with no special pre-bake requirements.
What is the leakage current specification for PACDN044YB5-LF at 5 V?
At 5.0 VDC and 25 °C, the PACDN044YB5-LF exhibits a maximum leakage current (ILEAK) of 100 nA, with typical value of 1 nA. This ultra-low leakage preserves battery life in always-on sensor nodes and avoids false triggering in high-impedance analog circuits - a critical parameter verified in Table 4 ("Electrical Operating Characteristics") of the official datasheet.
PACDN044YB5-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-88A (SC-70-5)
PACDN044YB5-LF FAQ
1.How can I place an order for PACDN044YB5-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for PACDN044YB5-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 PACDN044YB5-LF reliable?
The price and inventory of PACDN044YB5-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PACDN044YB5-LF is usually 5 days.
3.What payment methods are accepted for PACDN044YB5-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PACDN044YB5-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PACDN044YB5-LF?
PACDN044YB5-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PACDN044YB5-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 PACDN044YB5-LF?
For technical support, including PACDN044YB5-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PACDN044YB5-LF requirements.
6.How does Aetrix verify that PACDN044YB5-LF is sourced from the original manufacturer or authorized distributors?
All PACDN044YB5-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 PACDN044YB5-LF meets industry standards.
7.What is the process for return or replacement of PACDN044YB5-LF?
All PACDN044YB5-LF units undergo pre-shipment inspection (PSI). If there is an issue with PACDN044YB5-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 PACDN044YB5-LF part is unused and in its original packaging.
Return procedure for PACDN044YB5-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PACDN044YB5-LF Tags
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ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
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
-
D12V0L1B2LP-7B
Diodes Incorporated
-
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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