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onsemi CM1213A-01SO
- Part No.:
- CM1213A-01SO
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
CM1213A-01SO.pdf
- Description:
- TVS DIODE 3.3VWM 10VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,648
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Product details
Overview
CM1213A-01SO from onsemi is a single-channel low-capacitance ESD protection diode array designed for high-speed data lines, featuring 0.85 pF typical channel input capacitance, ±12 kV IEC 61000−4−2 contact discharge rating, and integrated VP–VN Zener clamping. It protects USB2.0, HDMI, and PCIe signal paths by steering ESD transients to supply rails without requiring external bypass capacitors.
For engineers reviewing the CM1213A-01SO datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low capacitance matching (0.02 pF typical), dynamic clamp voltage of +10 V / −1.7 V at 1 A, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The CM1213A-01SO implements a dual-diode series architecture per channel, routing positive/negative ESD pulses to VP or VN rails. Its embedded Zener diode between VP and VN provides rail-to-rail clamping and eliminates need for external VP-to-ground capacitor under standard IEC 61000−4−2 level 4 testing.
It operates across −40°C to +150°C, supports 3.3 V and 5.5 V supply rails, and maintains stable 0.85 pF input capacitance over temperature and voltage-critical for preserving signal integrity in 480 Mbps USB2.0 and 400/800 Mbps IEEE1394 interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±12 kV contact discharge per IEC 61000−4−2 level 4 - ensures robust system-level ESD immunity without additional protection stages. |
| Channel Input Capacitance | 0.85 pF typical at 1 MHz - preserves signal rise/fall times in high-speed serial links like USB2.0 and HDMI. |
| Capacitance Matching | 0.02 pF typical - enables precise differential pair protection with minimal skew in balanced interfaces. |
| Clamp Voltage (VCL) | +10 V (positive), −1.7 V (negative) at 1 A, 8/20 µs - limits transient overvoltage seen by downstream ICs during ESD events. |
| Operating Supply Range | 3.3 V to 5.5 V (VP − VN) - compatible with standard logic I/O voltage domains including USB PHY and display interface supplies. |
| Leakage Current | 1.0 µA max at 5 V - avoids DC loading or bias shift in sensitive analog or reference circuits. |
| Dynamic Resistance | 0.9 Ω (positive), 0.5 Ω (negative) - minimizes IR drop during fast ESD current surges, improving clamping accuracy. |
Pinout & Package
SOT23-3 package (Case 318), Pb-free, 2.90 mm × 1.30 mm footprint, 1.00 mm height - optimized for automated placement and reflow in compact consumer electronics assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CH1 | I/O Channel | Protected signal line input/output; connects directly to connector or high-speed data trace (e.g., USB D+). |
| 2 - VP | Positive Supply Rail | Bias supply connection; clamped by internal Zener to limit VP overshoot during positive ESD strikes. |
| 3 - VN | Negative Supply Rail / GND | Reference ground return; forms low-inductance path for negative ESD current to chassis or system ground. |
Key Features
| Feature | Design Value |
|---|---|
| Single-channel ESD protection | Minimizes board area and BOM count for point-of-entry protection on individual high-speed lines. |
| Integrated VP–VN Zener diode | Eliminates need for external 0.22 µF ceramic bypass capacitor, reducing component count and layout complexity. |
| 0.85 pF typical input capacitance | Enables use in 480 Mbps USB2.0 and 800 Mbps FireWire without measurable insertion loss or signal distortion. |
| 0.02 pF channel capacitance matching | Supports differential signaling integrity in HDMI and DisplayPort applications where skew must be <1 ps. |
| 1000+ ESD strike endurance | Validated for ≥1000 ±8 kV contact discharges - ensures long-term reliability in field-deployed peripherals. |
Applications
| USB2.0 Interface Protection | HDMI/DVI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB2.0 ports in notebooks and docking stations against human-body-model ESD events. IC Role / Device Role / Timing Role: Point-of-entry transient voltage suppressor placed within 3 mm of USB connector, clamping ESD before it reaches USB transceiver PHY. Use Value: 0.85 pF capacitance prevents signal degradation at 480 Mbps, while ±12 kV rating meets IEC 61000−4−2 compliance without derating. |
Use Scenario: Shielding TMDS clock and data channels in HDMI source devices (e.g., set-top boxes, GPUs) from connector-based ESD. IC Role / Device Role / Timing Role: Single-channel protection per TMDS lane; CH1 guards clock line, enabling precise timing margin preservation. Use Value: 0.02 pF capacitance matching minimizes differential skew across TMDS pairs, maintaining eye diagram integrity at 2.25 Gbps. |
| PCIe Gen1/Gen2 Lane Protection | IEEE1394 (FireWire) Port Protection |
Use Scenario: Safeguarding PCIe x1/x4 lanes in industrial PCs and embedded controllers from ESD induced at edge connectors. IC Role / Device Role / Timing Role: Per-lane ESD clamp positioned adjacent to PCIe edge connector; VP tied to 3.3 V auxiliary rail, VN to chassis ground. Use Value: +10 V / −1.7 V clamp voltage ensures PCIe receiver input stays within absolute maximum ratings during 12 kV contact discharge. |
Use Scenario: Hardening FireWire 400/800 ports in audio interfaces and camcorders against repeated handling-induced ESD. IC Role / Device Role / Timing Role: Dedicated CH1 protection for data pair (TPA/TPB); leverages low leakage (<1 µA) to avoid interfering with 1.8 V–3.3 V link-layer biasing. Use Value: 1000+ strike endurance supports >5-year field life in professional equipment subjected to frequent cable insertion/removal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD1E05U06DPYR | 0.5 pF typical capacitance, 1-channel, 5 V working voltage, SOT-5X3 package (1.0 mm × 0.6 mm) | Lower capacitance suits >5 Gbps interfaces (e.g., USB3.2 Gen1), but lacks integrated VP–VN Zener - requires external 0.1 µF bypass cap. | Select when minimizing capacitance is critical and board space allows extra decoupling; not drop-in for CM1213A-01SO's Zener-enabled layout. |
| ESD5Z3.3T5G | 0.8 pF typical, 1-channel, 3.3 V standoff, SOD-523 package (1.2 mm × 0.8 mm), no VP/VN rails - standalone TVS only | Requires separate supply rail connections for bidirectional clamping; no rail-to-rail protection or Zener-assisted VP clamping. | Choose for cost-sensitive, non-rail-referenced applications where VP/VN biasing is unavailable; not functionally equivalent due to missing Zener and rail-steering topology. |
Compared with TPD1E05U06DPYR and ESD5Z3.3T5G, CM1213A-01SO uniquely integrates VP–VN Zener clamping and rail-steering diodes in a 3-pin SOT23-3, enabling true bidirectional, supply-referenced ESD protection without external components-making it optimal for USB2.0, HDMI, and PCIe where layout simplicity and rail-aware clamping are essential.
Availability
CM1213A-01SO is available at Aetrix Electronics and suitable for USB2.0 port hardening, HDMI interface protection, and PCIe lane safeguarding requiring stable component supply across production lifecycles.
Supply support for CM1213A-01SO 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, analog, sensor, and ESD protection solutions for automotive, industrial, and computing markets.
The CM1213A family was engineered specifically for high-speed digital interface protection, targeting applications where ultra-low capacitance, rail-to-rail clamping, and minimal PCB footprint are mandatory design constraints.
FAQ
What is the maximum operating voltage for CM1213A-01SO?
The CM1213A-01SO supports an operating supply voltage range of 3.3 V to 5.5 V between VP and VN pins. This allows direct integration into common I/O domains such as USB2.0 (3.3 V), HDMI (5 V tolerant), and PCIe auxiliary rails. Exceeding 5.5 V may damage the internal Zener and diode structure, as specified in the Absolute Maximum Ratings table.
Does CM1213A-01SO require an external bypass capacitor?
No, CM1213A-01SO does not require an external bypass capacitor due to its integrated Zener diode between VP and VN. This Zener clamps VP during positive ESD transients, eliminating the need for a discrete 0.22 µF ceramic capacitor typically used in other ESD arrays. However, adding one improves performance under extreme dI/dt conditions.
Can CM1213A-01SO protect differential signal pairs?
CM1213A-01SO is a single-channel device and protects one signal line (e.g., USB D+ or HDMI TMDS clock). For full differential pair protection, two CM1213A-01SO units are required-one per line-with matched layout to preserve 0.02 pF capacitance matching and minimize skew. It is not a differential-input device.
What is the leakage current specification for CM1213A-01SO?
The CM1213A-01SO specifies a maximum channel leakage current (ILEAK) of 1.0 µA at 5 V (VP = 5 V, VN = 0 V, TA = 25°C). This low leakage ensures minimal impact on bias networks, reference voltages, or high-impedance inputs in precision analog or mixed-signal circuits interfacing with protected lines.
Is CM1213A-01SO qualified for automotive applications?
The base CM1213A-01SO is not AEC-Q101 qualified. However, the SZCM1213A-01SO variant-identical in electrical and mechanical specifications-is AEC-Q101 qualified and PPAP capable, intended for automotive infotainment, ADAS camera links, and body control modules requiring extended temperature and reliability validation.
CM1213A-01SO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 10V (Typ)
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
CM1213A-01SO FAQ
1.How can I place an order for CM1213A-01SO through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1213A-01SO 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 CM1213A-01SO reliable?
The price and inventory of CM1213A-01SO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1213A-01SO is usually 5 days.
3.What payment methods are accepted for CM1213A-01SO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1213A-01SO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1213A-01SO?
CM1213A-01SO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1213A-01SO 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 CM1213A-01SO?
For technical support, including CM1213A-01SO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1213A-01SO requirements.
6.How does Aetrix verify that CM1213A-01SO is sourced from the original manufacturer or authorized distributors?
All CM1213A-01SO 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 CM1213A-01SO meets industry standards.
7.What is the process for return or replacement of CM1213A-01SO?
All CM1213A-01SO units undergo pre-shipment inspection (PSI). If there is an issue with CM1213A-01SO, 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 CM1213A-01SO part is unused and in its original packaging.
Return procedure for CM1213A-01SO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1213A-01SO 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
-
D5V0L1B2WS-7
Diodes Incorporated
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