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onsemi CM1293A-04SO
- Part No.:
- CM1293A-04SO
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
CM1293A-04SO.pdf
- Description:
- TVS DIODE 3.3VWM 9.9VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:62,016
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Product details
Overview
CM1293A-04SO from onsemi is a 4-channel low-capacitance ESD protection array designed for high-speed data and clock lines, featuring ±8 kV IEC 61000-4-2 contact discharge rating, 2.0 pF max channel input capacitance, 1.5 pF typical I/O-to-I/O capacitance, and integrated VP–VN Zener clamping to protect supply rails without external bypass capacitors. It is used in HDMI, USB2.0, Serial ATA, and DVI interfaces in notebooks, digital TVs, and storage devices.
For engineers reviewing the CM1293A-04SO datasheet, pinout, applications, or equivalent options, key selection criteria include low signal-line loading (<2.0 pF), robust ±8 kV ESD immunity, clamping voltage performance (+9.9 V / –1.6 V at 1 A), SC-74 package footprint, and integrated rail protection eliminating discrete bypass caps.
Technical Context
The CM1293A-04SO implements a diode-steering architecture per channel: each I/O pin connects via back-to-back diodes to VP (positive rail) and VN (ground rail), enabling bidirectional ESD current diversion. A monolithic Zener diode between VP and VN provides supply-rail clamping independent of external components.
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. Its dynamic resistance is 0.96 Ω (positive) and 0.5 Ω (negative) under 1 A, 8/20 µs transients - critical for minimizing voltage overshoot during fast-rising ESD events.
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 surge immunity testing. |
| Channel Input Capacitance | 2.0 pF max at 1 MHz - preserves signal integrity on >480 Mbps USB2.0 and 1.65 Gbps SATA links. |
| I/O-to-I/O Capacitance | 1.5 pF typical - minimizes crosstalk between adjacent high-speed lanes (e.g., HDMI TMDS pairs). |
| Clamp Voltage | +9.9 V / –1.6 V at 1 A, 8/20 µs - limits transient overvoltage seen by downstream PHY ICs. |
| Supply Range | VP–VN = 3.3 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level-shifting. |
| Leakage Current | ±1.0 µA max at 5 V - avoids DC loading on sensitive analog or reference inputs. |
| Operating Temp | –40 °C to +85 °C - validated for industrial and consumer ambient environments. |
Pinout & Package
CM1293A-04SO is housed in an SC-74 (Case 318F) surface-mount package - 6-pin, 2.0 mm × 2.1 mm footprint, 0.95 mm height - optimized for space-constrained PCB layouts near connectors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CH1 | Protected I/O channel input - connects directly to high-speed signal line (e.g., HDMI D0+). |
| 2 | VN | Negative supply rail (GND) - return path for negative ESD current and Zener cathode reference. |
| 3 | CH2 | Protected I/O channel input - second data lane (e.g., HDMI D0– or USB D+). |
| 4 | CH3 | Protected I/O channel input - third high-speed line (e.g., HDMI D1+ or SATA TX+). |
| 5 | VP | Positive supply rail (PWR) - anode connection for positive ESD steering and Zener anode. |
| 6 | CH4 | Protected I/O channel input - fourth channel (e.g., HDMI CLK+ or PCIe RX+). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VP–VN Zener | Eliminates need for external 0.22 µF bypass capacitor - reduces BOM count and PCB area. |
| Low CIN & CIO | 2.0 pF max / 1.5 pF typical - enables use on 1.5+ Gbps serial links without measurable insertion loss degradation. |
| 1000-strike endurance | Each I/O pin withstands ≥1000 ±8 kV contact discharges - ensures long-term reliability in field-deployed equipment. |
| Pb-Free & RoHS | Compliant with EU RoHS Directive 2011/65/EU - meets environmental requirements for global commercial shipments. |
| SC-74 footprint | Standardized 6-pin SOT-23 variant - supports automated pick-and-place and reflow compatibility with legacy tooling. |
Applications
| HDMI Port Protection | USB2.0 Interface Protection |
|---|---|
Use Scenario: Protecting TMDS differential pairs and clock lines in notebook HDMI outputs against connector-based ESD events. IC Role / Device Role / Timing Role: ESD transient suppressor placed within 5 mm of HDMI connector, clamping surges before they reach GPU or display controller PHY. Use Value: 1.5 pF I/O-to-I/O capacitance prevents skew between D+/D– pairs; ±8 kV rating satisfies IEC 61000-4-2 system-level test requirements. | Use Scenario: Safeguarding D+ and D– lines of USB2.0 host/device ports in set-top boxes and digital camcorders. IC Role / Device Role / Timing Role: Bidirectional ESD clamp on full-speed (12 Mbps) and high-speed (480 Mbps) data lanes, referenced to local 3.3 V rail. Use Value: 2.0 pF max input capacitance avoids signal rise-time degradation; integrated Zener eliminates need for separate VBUS decoupling cap. |
| Serial ATA Data Line Protection | DVI Link Protection |
Use Scenario: Shielding SATA TX/RX differential pairs in HDD enclosures and desktop motherboards from handling-induced ESD. IC Role / Device Role / Timing Role: Four-channel array protecting two differential lanes (TX+, TX–, RX+, RX–) with shared VP/VN rails. Use Value: Low dynamic resistance (0.5–0.96 Ω) ensures clamp voltage stays below 10 V during 30 A/ns transients - preserving SATA receiver eye margin. | Use Scenario: Securing DVI TMDS channels in LCD monitors and projectors exposed to frequent cable insertion/removal. IC Role / Device Role / Timing Role: ESD guard for three data channels plus clock, mounted adjacent to DVI connector with minimal trace inductance. Use Value: SC-74 package allows dense placement near all four TMDS pins; ±1.0 µA leakage avoids DC offset in analog-compatible DVI receivers. |
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 typical CIO, ±12 kV contact rating, same SC-70 package but different pinout (CH1/CH2/VN/CH3/VP/CH4 vs. CH1/VN/CH2/CH3/VP/CH4). | Higher ESD rating suits harsher industrial environments; lower capacitance benefits >5 Gbps links (e.g., DisplayPort 1.4), but requires layout revision due to pin reordering. | Select when ±12 kV immunity or sub-1.5 pF crosstalk is mandatory; verify PCB pad compatibility before migration. |
| SP1002-04UTG | 4-channel, 0.65 pF typical CIN, ±8 kV rating, SOT-23-6 package with identical pinout (CH1/VN/CH2/CH3/VP/CH4) and same 2.0 pF max CIN spec. | Lower capacitance improves RF performance; same pinout enables drop-in replacement in existing CM1293A-04SO layouts without redesign. | Preferred for new designs targeting lowest possible signal loading; verified pin-compatible with no PCB changes required. |
Compared with TPD4E001DRYR and SP1002-04UTG, the CM1293A-04SO offers balanced performance for cost-sensitive consumer electronics - delivering proven ±8 kV protection and 2.0 pF capacitance in a widely adopted footprint, while SP1002-04UTG provides a direct-layout-compatible upgrade path and TPD4E001DRYR addresses higher immunity needs at the cost of pinout adaptation.
Availability
CM1293A-04SO is available at Aetrix Electronics and suitable for HDMI port protection, USB2.0 interface hardening, and Serial ATA data line safeguarding requiring stable component supply across production ramps and long-life programs.
Supply support for CM1293A-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 focused on energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The CM1293A-04SO belongs to onsemi's ESD protection portfolio targeting high-speed serial interfaces - engineered to deliver low-capacitance, rail-clamped transient suppression without external components for compact, reliable interconnect protection.
FAQ
What is the maximum operating voltage for CM1293A-04SO?
The CM1293A-04SO supports an operating supply voltage (VP − VN) up to 6.0 V absolute maximum, with standard operation specified from 3.3 V to 5.5 V. This range ensures compatibility with common logic domains including 3.3 V LVTTL and 5 V TTL systems. Exceeding 6.0 V may damage the internal Zener and steering diodes. The CM1293A-04SO must be biased within this window to maintain specified clamping behavior and leakage performance.
Does CM1293A-04SO require external bypass capacitors?
No, the CM1293A-04SO integrates a Zener diode between VP and VN that clamps supply-rail transients, eliminating the need for external bypass capacitors in most applications. However, for lowest possible clamp voltage - especially when VP is biased significantly below the Zener breakdown voltage - onsemi recommends adding a 0.22 µF ceramic capacitor between VP and ground. The CM1293A-04SO's design reduces BOM count and PCB area versus discrete protection solutions.
What is the channel-to-channel capacitance of CM1293A-04SO?
The CM1293A-04SO has a typical channel I/O-to-I/O capacitance (CIO) of 1.5 pF, measured between any two CHx pins at 1 MHz with VP = 3.3 V and VN = 0 V. This low value minimizes crosstalk in tightly spaced high-speed differential pairs such as HDMI TMDS or SATA lanes. The CM1293A-04SO's symmetric layout and internal diode structure contribute to consistent CIO across all channel combinations.
Can CM1293A-04SO be used for USB3.0 or PCIe Gen3 interfaces?
No, the CM1293A-04SO is not recommended for USB3.0 (5 Gbps) or PCIe Gen3 (8 GT/s) interfaces. Its 2.0 pF max input capacitance and bandwidth-limited diode structure introduce unacceptable insertion loss above ~1 GHz. The CM1293A-04SO is validated for USB2.0 (480 Mbps), SATA I/II (1.5–3 Gbps), HDMI 1.4 (up to 3.4 Gbps), and DVI - all operating below its usable frequency limit. For higher-speed protocols, consult onsemi's newer low-CIN arrays like NUP4201MR6T1G.
Is CM1293A-04SO RoHS compliant and lead-free?
Yes, the CM1293A-04SO is Pb-Free and RoHS compliant per EU Directive 2011/65/EU. The "SO" suffix denotes the lead-free SC-74 package, and the device carries appropriate marking (e.g., microdot or "G") per onsemi's Pb-Free packaging standards. The CM1293A-04SO meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for standard SnPb and lead-free reflow profiles.
CM1293A-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):
- 3.3V
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
CM1293A-04SO FAQ
1.How can I place an order for CM1293A-04SO through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1293A-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 CM1293A-04SO reliable?
The price and inventory of CM1293A-04SO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1293A-04SO is usually 5 days.
3.What payment methods are accepted for CM1293A-04SO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1293A-04SO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1293A-04SO?
CM1293A-04SO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1293A-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 CM1293A-04SO?
For technical support, including CM1293A-04SO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1293A-04SO requirements.
6.How does Aetrix verify that CM1293A-04SO is sourced from the original manufacturer or authorized distributors?
All CM1293A-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 CM1293A-04SO meets industry standards.
7.What is the process for return or replacement of CM1293A-04SO?
All CM1293A-04SO units undergo pre-shipment inspection (PSI). If there is an issue with CM1293A-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 CM1293A-04SO part is unused and in its original packaging.
Return procedure for CM1293A-04SO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1293A-04SO 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.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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