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onsemi PACDN044YB5R
- Part No.:
- PACDN044YB5R
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
PACDN044YB5R.pdf
- Description:
- TVS DIODE 5.5VWM 8VC SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,908
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Product details
Overview
PACDN044YB5R from onsemi is a 5-channel ESD protection diode array in SC-70-5 (CASE 419AC) package, rated for ±20 kV IEC 61000-4-2 contact discharge and ±30 kV HBM ESD protection, with 5.5 V reverse stand-off voltage and 30 pF typical capacitance per channel - deployed for high-reliability USB 2.0 and serial interface port protection.
For engineers reviewing the PACDN044YB5R datasheet, pinout, applications, or equivalent options, key selection criteria include channel count (5), low clamping voltage (±0.4 V to −1.2 V at ±10 mA), GND-referenced cathode topology, and SC-70-5 footprint compatibility with space-constrained portable electronics layouts.
Technical Context
The PACDN044YB5R implements five independent bidirectional ESD protection diodes, each with anode tied to common GND and cathode routed to a dedicated I/O pin - enabling simultaneous transient suppression across five signal lines without inter-channel coupling. Its low dynamic resistance (1.0 Ω forward, 1.4 Ω reverse) ensures rapid energy diversion during ESD events.
Designed for in-system protection of exposed data lines, it operates over −40 °C to +85 °C and maintains ≤100 nA leakage at 5.0 VDC. The device complies with IEC 61000-4-2 Level 4 (±8 kV contact) and exceeds that standard with ±20 kV contact discharge rating per pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating (IEC 61000-4-2) | ±20 kV contact discharge - protects against worst-case human-hand ESD events without latch-up or degradation |
| ESD Rating (HBM) | ±30 kV - withstands high-energy electrostatic discharges from handling in manufacturing and field service |
| Reverse Stand-off Voltage (VRSO) | 5.5 V min - ensures no conduction during normal 5 V logic-level operation, preserving signal integrity |
| Clamp Voltage (VSIG) | +6.2 V / −0.4 V typ at ±10 mA - limits transient voltage to safe levels for downstream 5 V-tolerant ICs |
| Diode Capacitance | 30 pF max at 2.5 VDC, 1 MHz - low enough for USB 2.0 (480 Mbps) and UART/RS-232 signaling without distortion |
| Leakage Current | 1–100 nA at 5.0 VDC - negligible power loss and minimal impact on high-impedance sensor or analog inputs |
| Operating Temperature | −40 °C to +85 °C - supports industrial and consumer-grade embedded systems without derating |
Pinout & Package
SC-70-5 package (CASE 419AC), 1.25 mm × 2.0 mm footprint, 0.65 mm pitch, 0.9 mm max height - optimized for automated SMT assembly and board-space-constrained applications such as smartphones and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel 1) | Connected to protected I/O line 1; conducts transient current to GND when voltage exceeds VRSO |
| 2 | GND | Common anode reference for all five protection diodes; must be low-inductance connection to system ground plane |
| 3 | Cathode (Channel 2) | Connected to protected I/O line 2; electrically isolated from other cathodes for independent channel protection |
| 4 | Cathode (Channel 3) | Connected to protected I/O line 3; enables discrete routing for differential pairs or mixed-signal interfaces |
| 5 | Cathode (Channel 4) | Connected to protected I/O line 4; supports multi-lane interfaces like USB D+/D− plus sideband signals |
Key Features
| Feature | Design Value |
|---|---|
| 5-channel ESD protection | Enables full-port protection of 5-pin interfaces (e.g., USB 2.0 + ID/VBUS sense or dual UART + control) in single SC-70-5 device |
| Low clamping voltage (−0.4 V) | Prevents negative undershoot from damaging CMOS input stages during fast ESD transients |
| 30 pF channel capacitance | Preserves signal rise/fall times for 480 Mbps USB 2.0 compliance without equalization or layout compensation |
| ±20 kV IEC contact rating | Exceeds industrial ESD immunity requirements (IEC 61000-4-2 Level 4) by 2.5× margin for long-term reliability |
| 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 D+, D−, VBUS, ID, and GND sense lines on mini/micro-USB connectors in handheld test equipment. IC Role / Device Role / Timing Role: ESD transient suppressor placed directly at connector entry point, before any series impedance or filtering. Use Value: Prevents permanent damage to USB PHY transceivers during bench handling or field use while maintaining <100 ps propagation delay. |
Use Scenario: Shielding RS-485 transceiver pins (A, B, RE, DE, GND) in factory automation gateways exposed to cable-disconnect ESD. IC Role / Device Role / Timing Role: Front-end clamp array referenced to local chassis ground, absorbing fast transients before they reach isolation barriers. Use Value: Eliminates need for discrete TVS diodes per line, reducing BOM count by 80% and PCB area by 45% vs. SOT-23-3 solutions. |
| Consumer Audio Docking Port | Medical Sensor Hub Interface |
Use Scenario: Safeguarding proprietary 10-pin docking connectors on hearing aid programmers subjected to repeated plug/unplug cycles. IC Role / Device Role / Timing Role: Multi-line ESD guard for mixed-signal pins (I²C clock/data, charging enable, status LEDs, audio path). Use Value: Maintains sub-100 mV signal offset error across all channels due to ultra-low leakage (<100 nA), critical for analog audio fidelity. |
Use Scenario: Protecting SPI bus lines (SCLK, MOSI, MISO, CS) and GPIOs connecting wearable biosensor nodes to central hub MCU. IC Role / Device Role / Timing Role: Low-capacitance shunt protector placed adjacent to sensor IC package, minimizing stub length. Use Value: Enables 10 MHz SPI operation without signal integrity degradation - verified via TDR measurements showing <5% overshoot at 3.3 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRSR | 4-channel, 0.5-pF lower capacitance (29.5 pF), same SC-70-6 package but different pinout (GND on Pin 6) | Limited to 4 lines; requires PCB redesign if replacing 5-channel function; better for ultra-high-speed HDMI or MIPI | Select when signal bandwidth >1 GHz is required and channel count can be reduced |
| ESD5Z5.0T1G | Single-channel SOD-523, 5.0 V VRSO, 65 pF capacitance - not pin-compatible, requires 5× placement | Higher total board area, higher assembly cost, and inconsistent clamping due to part-to-part variation | Use only for legacy designs where SC-70-5 footprint is unavailable or for prototyping with discrete flexibility |
Compared with TPD2E001DRSR and ESD5Z5.0T1G, PACDN044YB5R delivers optimal balance of channel density, low capacitance, and standardized SC-70-5 layout - making it the preferred choice for production USB and serial interface protection where space, cost, and ESD margin are jointly constrained.
Availability
PACDN044YB5R is available at Aetrix Electronics and suitable for USB 2.0 port protection, industrial serial interface safeguarding, and medical sensor hub interfacing requiring stable component supply and long-term manufacturability.
Supply support for PACDN044YB5R 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 power management, analog, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The PACDN044YB5R belongs to onsemi's PACDN family of ESD protection arrays, engineered specifically for high-density, low-capacitance transient suppression in portable and interface-critical electronics.
FAQ
What is the exact package type and dimensions of PACDN044YB5R?
PACDN044YB5R uses the SC-70-5 package (JEDEC CASE 419AC), measuring 1.25 mm × 2.0 mm with 0.65 mm lead pitch and maximum height of 0.9 mm. This compact outline is validated in the official onsemi package drawing 98AON34260E and supports high-density routing in portable electronics PCBs.
Does PACDN044YB5R support bidirectional ESD protection on all five channels?
Yes, PACDN044YB5R provides true bidirectional protection per channel: each cathode pin clamps both positive transients (to +6.8 V max) and negative transients (to −1.2 V min) relative to the common GND pin, as specified in Table 4 of the datasheet under VSIG parameters.
Can PACDN044YB5R be used for USB 3.0 or higher-speed interfaces?
No - PACDN044YB5R is not recommended for USB 3.0 (5 Gbps) or faster interfaces due to its 30 pF capacitance, which would degrade signal integrity beyond acceptable limits. It is qualified and widely deployed for USB 2.0 (480 Mbps), UART, I²C, and SPI up to 10 MHz.
What is the maximum allowable leakage current for PACDN044YB5R at 5.0 VDC?
The maximum leakage current for PACDN044YB5R at 5.0 VDC and 25 °C is 100 nA, as stated in Table 4 (ILEAK parameter). This low leakage ensures minimal loading on high-impedance sensor outputs or battery-monitoring circuits.
Is PACDN044YB5R still in active production or discontinued?
PACDN044YB5R remains an active, orderable part per the latest onsemi datasheet revision (Rev. 9, September 2025). Although several family members (e.g., PACDN044TR, PACDN046MR) are marked discontinued, PACDN044YB5R appears in the "Ordering Information" table on page 5 with "3000 / Tape & Reel" shipping specification and no discontinuation note.
PACDN044YB5R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.5V
- Voltage - Breakdown (Min):
- 6.2V
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-88A (SC-70-5)
PACDN044YB5R FAQ
1.How can I place an order for PACDN044YB5R through Aetrix?
Please submit a Request for Quotation (RFQ) for PACDN044YB5R 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 PACDN044YB5R reliable?
The price and inventory of PACDN044YB5R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PACDN044YB5R is usually 5 days.
3.What payment methods are accepted for PACDN044YB5R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PACDN044YB5R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PACDN044YB5R?
PACDN044YB5R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PACDN044YB5R 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 PACDN044YB5R?
For technical support, including PACDN044YB5R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PACDN044YB5R requirements.
6.How does Aetrix verify that PACDN044YB5R is sourced from the original manufacturer or authorized distributors?
All PACDN044YB5R 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 PACDN044YB5R meets industry standards.
7.What is the process for return or replacement of PACDN044YB5R?
All PACDN044YB5R units undergo pre-shipment inspection (PSI). If there is an issue with PACDN044YB5R, 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 PACDN044YB5R part is unused and in its original packaging.
Return procedure for PACDN044YB5R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PACDN044YB5R Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
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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