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onsemi SCM1293A-04SO
- Part No.:
- SCM1293A-04SO
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
SCM1293A-04SO.pdf
- Description:
- TVS DIODE SC74
- Quantity:
- Payment:
- Shipping:
Inventory:42,712
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Product details
Overview
SCM1293A-04SO from onsemi is a 4-channel low-capacitance ESD protection array designed for high-speed data lines, featuring 2.0 pF max channel input capacitance, ±8 kV IEC 61000-4-2 contact discharge rating, and integrated VP–VN Zener clamping. It protects USB2.0, HDMI, DVI, and SATA interfaces by steering ESD transients to supply rails while minimizing signal distortion.
For engineers reviewing the SCM1293A-04SO datasheet, pinout, applications, or equivalent options, key selection criteria include channel-to-channel capacitance (1.5 pF typ), clamping voltage (+9.9 V / –1.6 V at 1 A), dynamic resistance (0.96 Ω / 0.5 Ω), and SC-74 package compatibility with high-density PCB layouts.
Technical Context
The SCM1293A-04SO implements a dual-diode steering architecture per channel-each I/O pin connects to both VP and VN rails via series diodes-enabling bidirectional ESD current diversion. Its embedded Zener diode between VP and VN (breakdown ~5.5 V) actively clamps supply rail overvoltage during ESD events, eliminating need for external bypass capacitors under nominal bias.
It operates across –40°C to +85°C with 3.3 V to 5.5 V supply range, supports ≤6.0 V VP–VN differential, and maintains <±1.0 µA leakage at 5 V bias. Channel clamp voltage is specified at 1 A, 8/20 µs waveform, confirming robust transient suppression without compromising signal integrity in >480 Mbps data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±8 kV contact discharge per IEC 61000-4-2 Level 4 - ensures compliance in end-equipment ESD immunity testing |
| Channel Input Capacitance | 2.0 pF max at 1 MHz - preserves signal integrity on USB2.0/HDMI/DVI lines up to 1.5 Gbps |
| Channel I/O–I/O Capacitance | 1.5 pF typical - minimizes crosstalk between adjacent protected lines |
| Clamp Voltage (Positive) | +9.9 V at 1 A, 8/20 µs - limits voltage overshoot on protected I/O during fast-rising ESD pulses |
| Clamp Voltage (Negative) | –1.6 V at 1 A, 8/20 µs - prevents negative rail undershoot that could damage downstream receivers |
| Dynamic Resistance | 0.96 Ω (pos) / 0.5 Ω (neg) - enables low-voltage clamping with minimal IR drop during high-current transients |
| Supply Range (VP–VN) | 3.3 V to 5.5 V - matches standard logic supply domains including USB 3.3 V and PCIe 3.3 V rails |
Pinout & Package
SCM1293A-04SO is housed in an SC-74 (Case 318F) surface-mount package - 6-pin, 2.0 mm × 1.25 mm footprint, 0.95 mm height - optimized for space-constrained high-speed interface routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CH1) | I/O Protection Channel | Input/output line protected by dual-diode path to VP/VN; connects directly to connector or IC pad |
| 2 (VN) | Negative Supply Rail | Ground reference for ESD current return; must be low-inductance connection to system ground plane |
| 3 (CH2) | I/O Protection Channel | Second independent ESD channel; electrically isolated from CH1, CH3, CH4 |
| 4 (CH3) | I/O Protection Channel | Third independent ESD channel; shares no internal coupling with other channels beyond VP/VN rails |
| 5 (VP) | Positive Supply Rail | Power rail clamped by internal Zener; requires local 0.22 µF ceramic capacitor for optimal clamping performance |
| 6 (CH4) | I/O Protection Channel | Fourth independent ESD channel; fully symmetric with CH1–CH3 in layout and electrical behavior |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VP–VN Zener diode | Eliminates need for external bypass capacitor in most applications, reducing BOM count and PCB area |
| 1.5 pF CH–CH capacitance | Enables use in tightly spaced differential pairs (e.g., HDMI TMDS lanes) without measurable crosstalk degradation |
| 2.0 pF max CH–GND capacitance | Preserves rise/fall times on 480 Mbps USB2.0 signals, avoiding jitter accumulation or eye closure |
| 1000+ ESD strike endurance | Validated for 1000 consecutive ±8 kV contact discharges with full parametric retention post-test |
| Pb-free & RoHS-compliant | Meets global environmental regulations and reflow soldering profiles up to 260°C peak |
Applications
| HDMI/DVI Port Protection | Serial ATA Interface Protection |
|---|---|
Use Scenario: Protecting HDMI TMDS clock and data lanes in notebook PCs and digital TVs against user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional ESD shunt placed between connector and GPU/PHY, clamping transients before signal integrity is compromised. Use Value: 1.5 pF inter-channel capacitance prevents skew between differential pairs; ±8 kV rating meets IEC 61000-4-2 system-level compliance. | Use Scenario: Safeguarding SATA TX/RX differential pairs in desktop motherboards and HDD controllers from connector-based ESD events. IC Role / Device Role / Timing Role: Per-lane ESD suppressor mounted at SATA edge connector, with VP tied to 3.3 V rail and VN to chassis ground. Use Value: 2.0 pF max input capacitance avoids signal attenuation above 1.5 GHz, maintaining SATA II 3 Gbps eye margin. |
| USB2.0 High-Speed Data Line Protection | PCI Express Lane Protection |
Use Scenario: Shielding D+ and D– lines of USB2.0 ports in digital camcorders and docking stations from repeated electrostatic discharge. IC Role / Device Role / Timing Role: Dual-channel ESD array protecting full-speed and high-speed USB data paths with shared VP/VN rails. Use Value: Low clamping voltage (–1.6 V neg / +9.9 V pos) prevents receiver input stage damage while preserving 480 Mbps timing margins. | Use Scenario: Adding system-level ESD robustness to PCIe Gen1 x1/x4 slots in industrial embedded controllers and server backplanes. IC Role / Device Role / Timing Role: One SCM1293A-04SO per x4 slot protecting four independent lanes, each with dedicated CHx–VP/VN path. Use Value: SC-74 footprint allows placement within 3 mm of edge connector, minimizing stub inductance and ensuring sub-100 ps response latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E001DRYR | 4-channel, 1.0 pF max CIN, ±12 kV contact rating, SOT-553 package (1.6 × 1.6 mm) | Lower capacitance suits >5 Gbps interfaces (e.g., USB3.1 Gen1); smaller package increases routing density but reduces thermal mass | Select when ultra-low capacitance is critical and board space permits tighter layout constraints. |
| SP3203-04UTG | 4-channel, 3.5 pF max CIN, ±8 kV contact, SOT-23-6 package (2.9 × 1.6 mm) | Higher capacitance limits use to ≤480 Mbps; larger footprint eases hand-soldering and improves thermal dissipation for burst-mode ESD | Prefer for cost-sensitive industrial designs where 2.0 pF vs. 3.5 pF has negligible impact on signal fidelity. |
Compared with TPD4E001DRYR and SP3203-04UTG, the SCM1293A-04SO delivers balanced performance: lower capacitance than SP3203-04UTG for high-speed fidelity, higher ESD robustness margin than TPD4E001DRYR's 1.0 pF–limited clamping headroom, and SC-74 packaging optimized for automated assembly yield in consumer electronics volume production.
Availability
SCM1293A-04SO is available at Aetrix Electronics and suitable for HDMI port protection, Serial ATA interface safeguarding, and USB2.0 high-speed data line ESD mitigation requiring stable component supply across consumer, computing, and industrial product lifecycles.
Supply support for SCM1293A-04SO 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 SCM1293A-04SO belongs to onsemi's ESD protection portfolio, engineered specifically for high-speed serial interface protection where minimal capacitive loading and repeatable ±8 kV surge tolerance are mandatory design requirements.
FAQ
What is the maximum operating voltage for SCM1293A-04SO?
The SCM1293A-04SO supports an operating supply voltage range of 3.3 V to 5.5 V between VP and VN pins, with absolute maximum VP–VN differential rated at 6.0 V. Exceeding this limit risks permanent damage to the internal Zener diode and steering diodes. The device is not rated for continuous operation above 5.5 V, and DC bias on any I/O pin must remain within (VN − 0.5 V) to (VP + 0.5 V) to avoid forward conduction or breakdown.
Does SCM1293A-04SO require an external bypass capacitor on the VP pin?
The SCM1293A-04SO integrates a Zener diode between VP and VN to clamp supply rail transients, eliminating the need for an external bypass capacitor in many applications. However, for lowest possible clamping voltage-especially when VP is biased significantly below the Zener breakdown voltage-a 0.22 µF ceramic capacitor placed as close as possible to the VP pin is recommended per onsemi application guidance.
How many ESD strikes can SCM1293A-04SO withstand without performance degradation?
The SCM1293A-04SO is validated to withstand over 1000 consecutive ±8 kV contact discharge ESD strikes per IEC 61000-4-2 Level 4, with all electrical parameters remaining within specification after testing. This endurance is confirmed under standard test conditions: 1-second intervals, continuous 1000-pulse run, followed by full production parametric verification.
What is the channel-to-channel capacitance of SCM1293A-04SO?
The SCM1293A-04SO exhibits 1.5 pF typical capacitance between any two I/O channels (e.g., CH1–CH2), measured at 1 MHz with VP = 3.3 V and VN = 0 V. This low inter-channel coupling minimizes crosstalk in dense routing scenarios such as HDMI TMDS or SATA differential pair layouts, directly supporting signal integrity in high-speed serial links.
Is SCM1293A-04SO compatible with lead-free reflow soldering processes?
Yes, SCM1293A-04SO is Pb-free and RoHS compliant, qualified for standard lead-free reflow profiles with peak temperatures up to 260°C. Its SC-74 package uses matte tin plating and meets J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life at ≤30°C/60% RH without dry-pack requirements.
SCM1293A-04SO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-74, SOT-457
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 9.9V (Typ)
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- DVI, HDMI
- Capacitance @ Frequency:
- 2pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
SCM1293A-04SO FAQ
1.How can I place an order for SCM1293A-04SO through Aetrix?
Please submit a Request for Quotation (RFQ) for SCM1293A-04SO 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 SCM1293A-04SO reliable?
The price and inventory of SCM1293A-04SO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCM1293A-04SO is usually 5 days.
3.What payment methods are accepted for SCM1293A-04SO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCM1293A-04SO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCM1293A-04SO?
SCM1293A-04SO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCM1293A-04SO 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 SCM1293A-04SO?
For technical support, including SCM1293A-04SO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCM1293A-04SO requirements.
6.How does Aetrix verify that SCM1293A-04SO is sourced from the original manufacturer or authorized distributors?
All SCM1293A-04SO 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 SCM1293A-04SO meets industry standards.
7.What is the process for return or replacement of SCM1293A-04SO?
All SCM1293A-04SO units undergo pre-shipment inspection (PSI). If there is an issue with SCM1293A-04SO, 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 SCM1293A-04SO part is unused and in its original packaging.
Return procedure for SCM1293A-04SO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SCM1293A-04SO Tags
-
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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