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onsemi CM1213A-02SR
- Part No.:
- CM1213A-02SR
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
CM1213A-02SR.pdf
- Description:
- TVS DIODE 3.3VWM 10VC SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:8,580
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Product details
Overview
CM1213A-02SR from onsemi is a 2-channel low-capacitance ESD protection 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, IEEE1394, and DVI/HDMI signal paths in notebooks and set-top boxes.
For engineers reviewing the CM1213A-02SR datasheet, pinout, applications, or equivalent options, key selection criteria include channel count, ultra-low capacitance matching (0.02 pF typical), clamp voltage under 1 A transient (+10 V / −1.7 V), SOT143-4 package footprint, and automotive-grade AEC-Q101 qualification via SZ prefix variants.
Technical Context
The CM1213A-02SR implements dual bidirectional ESD protection channels using stacked diode pairs per I/O line, steering transients to VP (positive rail) or VN (ground rail). Its embedded Zener diode between VP and VN clamps supply rail excursions during positive ESD events, eliminating need for external bypass capacitors in many layouts.
Each channel operates with minimal voltage-dependent capacitance variation and maintains tight 0.02 pF typical input capacitance matching-critical for differential signaling integrity. The device supports 3.3 V and 5.5 V supply rails and withstands >1000 ESD strikes at ±8 kV contact discharge per IEC 61000−4−2 Level 4.
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 external TVS cascading. |
| Channel Input Capacitance | 0.85 pF typical at 1 MHz - preserves signal integrity up to 480 Mbps USB2.0 and 800 Mbps FireWire. |
| Capacitance Matching | 0.02 pF typical - enables precise differential pair protection with minimal skew in HDMI/DVI applications. |
| Clamp Voltage (IPP = 1 A) | +10 V (positive), −1.7 V (negative) - limits protected line overvoltage during fast transients while maintaining logic-level compatibility. |
| Supply Voltage Range | 3.3 V to 5.5 V VP–VN - supports both legacy 3.3 V and modern mixed-rail interfaces. |
| Operating Temperature | −40 °C to +150 °C - qualified for automotive cabin and industrial edge computing environments. |
| Leakage Current | 1.0 µA max at 5 V - prevents signal degradation and power loss in always-on high-impedance data lines. |
Pinout & Package
SOT143-4 package (Case 318A), 2.90 mm × 1.40 mm × 1.12 mm body, gull-wing leads, Pb-free, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VN | Negative supply rail (GND reference); provides return path for negative ESD current and bias reference for internal Zener. |
| 2 | CH1 | First bidirectional ESD channel I/O; connects directly to protected signal line (e.g., USB D+). |
| 3 | CH2 | Second bidirectional ESD channel I/O; pairs with CH1 for differential signals like HDMI TMDS or FireWire data lanes. |
| 4 | VP | Positive supply rail; supplies clamping energy for positive transients and biases internal Zener diode. |
Key Features
| Feature | Design Value |
|---|---|
| Two-channel ESD protection | Dedicated CH1/CH2 pins enable simultaneous protection of differential or independent high-speed lines without shared impedance paths. |
| Integrated VP–VN Zener | Eliminates need for external 0.22 µF bypass capacitor in most designs, reducing BOM count and PCB area. |
| 0.02 pF capacitance matching | Ensures <1 ps skew between differential channels-critical for HDMI 1.4/USB2.0 eye diagram compliance. |
| 1000+ ESD strike endurance | Validated under IEC61000−4−2 Level 4 (±8 kV contact × 1000 pulses), supporting field-replaceable port reliability. |
| AEC-Q101 qualified variant | SZCM1213A-02SR meets automotive stress testing requirements for infotainment and ADAS interface protection. |
Applications
| USB2.0 Interface Protection | HDMI/DVI TMDS Line Protection |
|---|---|
Use Scenario: Protecting USB2.0 D+/D− lines in notebook docking stations against user-hand ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed within 3 mm of USB connector, clamping ESD energy before it reaches USB PHY. Use Value: 0.85 pF capacitance avoids signal rise-time degradation at 480 Mbps, preserving eye height and jitter margin per USB-IF compliance tests. | Use Scenario: Shielding HDMI source output (e.g., GPU to display) from ESD induced by cable handling in digital signage systems. IC Role / Device Role / Timing Role: Dual-channel ESD array applied to TMDS clock and data pairs, leveraging matched capacitance to maintain differential skew <0.5 ps. Use Value: Integrated Zener eliminates need for discrete 3.3 V rail decoupling capacitor, simplifying 4-layer PCB stackup near HDMI connectors. |
| IEEE1394 (FireWire) Port Protection | PCIe Gen1/Gen2 Reference Clock Protection |
Use Scenario: Safeguarding 400/800 Mbps FireWire ports in professional audio interfaces exposed to studio environment ESD. IC Role / Device Role / Timing Role: Two independent ESD channels assigned to TPB/TPA differential pair, with VN tied to chassis ground and VP to local 3.3 V rail. Use Value: ±12 kV contact rating exceeds IEC61000−4−2 Level 4 requirement, ensuring CE-marked product certification without additional shielding. | Use Scenario: Protecting 100 MHz PCIe reference clock traces running from motherboard to M.2 slot in industrial servers. IC Role / Device Role / Timing Role: Single CM1213A-02SR used across two clock lines (REFCLK+ and REFCLK−), exploiting low CIN to avoid phase noise degradation. Use Value: 0.02 pF capacitance matching minimizes differential-to-common-mode conversion, reducing jitter accumulation in PCIe Gen2 timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Single-channel, 0.8 pF CIN, no integrated Zener - requires external 0.1 µF VP–VN capacitor. | Not suitable for space-constrained dual-line protection; limited to single-signal or sequential routing. | Select when only one high-speed line needs protection and board area allows discrete decoupling. |
| ESD56084D05 | 4-channel, 0.5 pF CIN, higher 15 kV ESD rating, but larger SC70-6 package (1.25 × 2.0 mm). | Better for multi-lane interfaces (e.g., SATA, PCIe x4), but over-spec'd and costlier for dual-line use cases. | Prefer when protecting ≥3 differential pairs or requiring highest ESD margin in compact form factor. |
Compared with TPD2E001DRYR and ESD56084D05, the CM1213A-02SR delivers optimal balance of dual-channel integration, ultra-low capacitance matching, and self-contained Zener clamping in the smallest possible footprint (SOT143-4), making it ideal for USB2.0 and HDMI port protection where layout density and signal fidelity are critical.
Availability
CM1213A-02SR is available at Aetrix Electronics and suitable for USB2.0 ports, HDMI/DVI interfaces, and IEEE1394 FireWire applications requiring stable component supply across industrial, automotive, and consumer electronics production cycles.
Supply support for CM1213A-02SR 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, sensor, and ESD protection solutions for automotive, industrial, and computing markets.
The CM1213A family was engineered specifically for high-speed serial interface ESD protection, targeting applications where sub-1 pF capacitance, differential signal fidelity, and supply-rail self-protection are mandatory design constraints.
FAQ
What is the maximum operating voltage for CM1213A-02SR?
The CM1213A-02SR supports an operating supply voltage range of 3.3 V to 5.5 V between VP and VN pins, as specified in Table 3 of the datasheet. This allows direct integration into both 3.3 V and 5 V systems without level-shifting circuitry. Exceeding 5.5 V risks permanent damage per absolute maximum ratings.
Does CM1213A-02SR require an external bypass capacitor?
No, CM1213A-02SR does not require an external bypass capacitor due to its integrated Zener diode between VP and VN. This Zener clamps supply rail excursions during positive ESD strikes, eliminating the need for a discrete 0.22 µF capacitor in most layouts-though adding one improves performance under extreme conditions.
Is CM1213A-02SR suitable for automotive applications?
The base CM1213A-02SR is not automotive-qualified, but its SZ-prefix variant SZCM1213A-02SR is AEC-Q101 qualified and PPAP capable. For automotive use-including infotainment and ADAS interfaces-only the SZCM1213A-02SR variant should be selected to meet required reliability and process control standards.
How many ESD strikes can CM1213A-02SR withstand?
CM1213A-02SR is rated for over 1000 ESD strikes at ±8 kV contact discharge per IEC 61000−4−2 Level 4, tested continuously with 1-second intervals. Post-test validation confirms all electrical parameters remain within specification, ensuring long-term port reliability in high-touch consumer devices.
What is the thermal performance of CM1213A-02SR in SOT143-4 package?
CM1213A-02SR in SOT143-4 package has a maximum junction temperature of +150 °C and a storage temperature range of −65 °C to +150 °C. Its 225 mW package power rating supports continuous operation in ambient temperatures up to +85 °C with standard PCB copper pour, verified per JEDEC JESD51 thermal characterization.
CM1213A-02SR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 2
- 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-143
CM1213A-02SR FAQ
1.How can I place an order for CM1213A-02SR through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1213A-02SR 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-02SR reliable?
The price and inventory of CM1213A-02SR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1213A-02SR is usually 5 days.
3.What payment methods are accepted for CM1213A-02SR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1213A-02SR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1213A-02SR?
CM1213A-02SR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1213A-02SR 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-02SR?
For technical support, including CM1213A-02SR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1213A-02SR requirements.
6.How does Aetrix verify that CM1213A-02SR is sourced from the original manufacturer or authorized distributors?
All CM1213A-02SR 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-02SR meets industry standards.
7.What is the process for return or replacement of CM1213A-02SR?
All CM1213A-02SR units undergo pre-shipment inspection (PSI). If there is an issue with CM1213A-02SR, 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-02SR part is unused and in its original packaging.
Return procedure for CM1213A-02SR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1213A-02SR 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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