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onsemi CM1215-02SR
- Part No.:
- CM1215-02SR
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
CM1215-02SR.pdf
- Description:
- TVS DIODE 4.8VC SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:5,799
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Product details
Overview
CM1215-02SR from onsemi is a 2-channel low-capacitance ESD protection array designed for high-speed data lines including USB2.0, IEEE1394, and Serial ATA. It delivers ±15 kV IEC 61000-4-2 contact ESD protection per channel, features 1.6 pF typical channel input capacitance, 0.13 pF mutual capacitance, and operates from 3.3 V to 5.5 V supply rails.
For engineers reviewing the CM1215-02SR datasheet, pinout, applications, or equivalent options, this device is selected for high-speed interface protection where minimal signal distortion, tight capacitance matching (ΔCIN = 0.04 pF), and robust multi-strike endurance (>1000 ESD events per pin) are critical design requirements.
Technical Context
The CM1215-02SR implements a dual-diode steering architecture per channel-each I/O pin connects via back-to-back diodes to VP (positive rail) and VN (negative rail)-enabling bidirectional clamping of ESD transients to supply rails. It requires external 0.2 µF low-ESR ceramic bypass between VP and VN for compliant operation per IEC 61000-4-2.
Its SOT143-4 package places CH1 and CH2 on pins 2 and 3, with VN on pin 1 and VP on pin 4, enabling compact placement near high-speed connectors. The device exhibits stable capacitance across temperature and voltage, with dynamic resistance of 0.4 Ω during 1 A, 8/20 µs transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Protection Level | ±15 kV per IEC 61000-4-2 contact discharge - ensures system-level immunity without additional transient suppressors |
| Channel Input Capacitance (CIN) | 1.6 pF typical at 1 MHz - preserves signal integrity on >400 Mbps interfaces like FireWire 400/800 |
| Mutual Capacitance (CMUTUAL) | 0.13 pF typical - minimizes crosstalk between protected differential or adjacent single-ended lines |
| Capacitance Matching (ΔCIN) | 0.04 pF typical - maintains impedance balance in differential pairs such as DVI/HDMI TMDS channels |
| Clamp Voltage (VCL) | VP + 1.5 V / VN − 1.5 V at 1 A - limits stress on downstream ICs during ESD events |
| Dynamic Resistance (RDYN) | 0.4 Ω for both polarities - enables fast, low-voltage clamping with minimal overshoot |
| Supply Voltage Range (VP−VN) | 3.3 V to 5.5 V - compatible with standard logic I/O domains including 3.3 V and 5 V systems |
Pinout & Package
SOT143-4 package (Case 527AF), Pb-free, RoHS-compliant, 1.4 mm × 1.4 mm footprint with 0.95 mm pitch. Thermal pad not present; power dissipation rated at 225 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VN | Negative supply rail connection - must be tied directly to system ground plane with low-inductance path |
| 2 | CH1 | First protected I/O channel - routes high-speed signal (e.g., USB D+, FireWire TPB) through diode steering network |
| 3 | CH2 | Second protected I/O channel - used for complementary signal (e.g., USB D−, FireWire TPA) or independent line |
| 4 | VP | Positive supply rail connection - requires local 0.2 µF low-ESR ceramic capacitor to VN for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| Two independent ESD channels | Enables protection of differential pairs (e.g., USB2.0, FireWire) without cross-coupling or shared path degradation |
| 1.6 pF typical channel capacitance | Supports signal bandwidths exceeding 1 GHz while maintaining <0.1 dB insertion loss at 500 MHz |
| 0.04 pF channel-to-channel capacitance mismatch | Preserves common-mode rejection and timing skew in high-speed serial links |
| 1000+ ESD strike endurance per pin | Ensures long-term reliability in field-deployed equipment subject to repeated handling-induced discharges |
| 0.4 Ω dynamic resistance | Reduces clamp voltage overshoot by >30% versus higher-RDYN alternatives under 1 A, 8/20 µs pulses |
Applications
| IEEE1394 FireWire® Ports | DVI/HDMI Video Interfaces |
|---|---|
Use Scenario: Protecting 400/800 Mbps FireWire ports in digital camcorders and external storage enclosures against connector-based ESD. IC Role / Device Role / Timing Role: Bidirectional ESD clamp placed between connector and PHY IC, referenced to 3.3 V supply rails. Use Value: 1.6 pF CIN and 0.13 pF CMUTUAL prevent signal rise-time degradation and jitter accumulation on 110 Ω differential pairs. |
Use Scenario: Shielding DVI/HDMI TMDS clock and data channels in notebooks and LCD TVs from hot-plug ESD events. IC Role / Device Role / Timing Role: Per-channel ESD suppression on each TMDS pair, with VP/VN tied to 3.3 V/0 V rails. Use Value: 0.04 pF ΔCIN ensures matched delay across differential lanes, preserving eye diagram integrity at 1.65 Gbps. |
| Serial ATA Data Links | PCI Express Gen1 Lanes |
Use Scenario: Safeguarding SATA I (1.5 Gbps) host/device interfaces in desktop PCs and HDD enclosures during cable insertion. IC Role / Device Role / Timing Role: Point-of-entry protection on TX/RX differential lanes, mounted within 5 mm of connector. Use Value: Sub-2 pF loading avoids violating SATA's 30 pF max AC-coupling cap budget while meeting ±15 kV system-level ESD compliance. |
Use Scenario: Adding board-level ESD resilience to PCIe Gen1 x1/x4 slots in embedded computing modules and add-in cards. IC Role / Device Role / Timing Role: Channel-specific clamping on each lane's differential pair, with VP connected to 3.3 V auxiliary rail. Use Value: 0.4 Ω RDYN limits clamp overshoot to <2.0 V above VP, preventing false triggering of PCIe receiver threshold detectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR (TI) | Single-channel, 0.8 pF CIN, SOT-5X3 package - lower capacitance but only one channel per unit | Requires two units for dual-line protection; lacks integrated VP/VN rail routing | Select when ultra-low 0.8 pF loading is mandatory and layout area allows dual placement |
| ESD5Z3.3T5G (onsemi) | Single-line TVS diode, 12 pF CIN, SOD-523 - higher capacitance, no VP/VN rail steering | Clamps to ground only; unsuitable for rail-to-rail clamping in powered interfaces | Choose only for cost-sensitive, non-high-speed applications where 12 pF loading is acceptable |
Compared with TPD2E001DRYR and ESD5Z3.3T5G, the CM1215-02SR uniquely provides dual-channel rail-steering ESD protection in a single SOT143 package with 1.6 pF loading and matched capacitance - making it optimal for space-constrained, high-speed differential interfaces requiring coordinated channel protection.
Availability
CM1215-02SR is available at Aetrix Electronics and suitable for USB2.0 interface protection, IEEE1394 port hardening, and Serial ATA data link safeguarding requiring stable component supply across production lifecycles.
Supply support for CM1215-02SR 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The CM1215-02SR belongs to onsemi's low-capacitance ESD array product line, engineered specifically for high-speed digital interfaces where signal fidelity and compact board space are critical constraints.
FAQ
What is the maximum operating voltage for the CM1215-02SR?
The CM1215-02SR supports an operating supply voltage range of 3.3 V to 5.5 V between VP and VN pins. Its absolute maximum rating is 6 V, but sustained operation above 5.5 V is not recommended. The device must be biased within this window to ensure proper diode conduction during ESD events and avoid leakage or breakdown.
Does the CM1215-02SR require external components to function correctly?
Yes - the CM1215-02SR requires a 0.2 µF low-ESR ceramic capacitor placed directly between VP and VN pins, as specified in the datasheet. This capacitor provides the low-impedance return path needed for effective rail-to-rail clamping during IEC 61000-4-2 ESD events. Omitting it degrades clamp performance and may cause failure to meet ±15 kV compliance.
Can the CM1215-02SR protect differential signaling standards like USB2.0 or HDMI?
Yes - the CM1215-02SR is explicitly validated for USB2.0, HDMI, DVI, and IEEE1394. Its 1.6 pF typical channel capacitance, 0.04 pF inter-channel mismatch, and 0.13 pF mutual capacitance preserve signal integrity on differential pairs. Each channel operates independently, allowing CH1 and CH2 to protect complementary lines without coupling.
What is the expected lifetime of the CM1215-02SR under repeated ESD stress?
The CM1215-02SR is rated for over 1000 ESD strikes per I/O pin under IEC 61000-4-2 level 4 (±15 kV contact) conditions. This endurance is verified across temperature and voltage ranges, ensuring long-term reliability in consumer and industrial equipment subjected to frequent handling and connector mating cycles.
Is the CM1215-02SR RoHS-compliant and lead-free?
Yes - the CM1215-02SR is manufactured in a Pb-free process and fully complies with RoHS Directive 2011/65/EU. The SOT143 package carries the "M" marking denoting Pb-free construction, and all materials meet JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements for reflow compatibility.
CM1215-02SR 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):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 4.8V (Typ)
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
CM1215-02SR FAQ
1.How can I place an order for CM1215-02SR through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1215-02SR 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 CM1215-02SR reliable?
The price and inventory of CM1215-02SR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1215-02SR is usually 5 days.
3.What payment methods are accepted for CM1215-02SR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1215-02SR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1215-02SR?
CM1215-02SR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1215-02SR 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 CM1215-02SR?
For technical support, including CM1215-02SR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1215-02SR requirements.
6.How does Aetrix verify that CM1215-02SR is sourced from the original manufacturer or authorized distributors?
All CM1215-02SR 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 CM1215-02SR meets industry standards.
7.What is the process for return or replacement of CM1215-02SR?
All CM1215-02SR units undergo pre-shipment inspection (PSI). If there is an issue with CM1215-02SR, 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 CM1215-02SR part is unused and in its original packaging.
Return procedure for CM1215-02SR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1215-02SR 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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