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onsemi CM1218-05SE
- Part No.:
- CM1218-05SE
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
CM1218-05SE.pdf
- Description:
- TRANS VOLTAGE SUPPRESSOR DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:208,000
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Product details
Overview
CM1218-05SE from onsemi is a 5-channel low-capacitance transient voltage suppressor (TVS) array designed for ESD protection of high-speed data lines. It delivers ±15 kV IEC 61000−4−2 contact discharge immunity, 7 pF typical channel input capacitance, and 5.5 V reverse stand-off voltage, enabling robust protection for USB 2.0, HDMI, and other compact interface ports without signal integrity degradation.
For engineers reviewing the CM1218-05SE datasheet, pinout, applications, or equivalent options, this device is selected for space-constrained consumer electronics requiring ultra-low capacitance, multi-line ESD hardening, and Pb-free SMT compatibility in 1.6 × 1.6 mm footprint.
Technical Context
The CM1218-05SE integrates five independent TVS diodes with common anode configuration in a single SOT-563 package. Each channel features a low-leakage silicon avalanche structure rated for ±30 kV HBM ESD per MIL-STD-883D Method 3015 and clamps transients at ≤6.8 V (positive) and ≥−0.8 V (negative) under 10 mA stress.
Its design centers on minimizing parasitic capacitance to preserve signal rise/fall times in >480 Mbps interfaces. The 0.19 pF differential I/O-to-GND capacitance and 1.1 Ω forward dynamic resistance ensure minimal insertion loss and fast response (<1 ns) to ESD events while maintaining DC blocking integrity up to 5.0 V operating voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 5 independent ESD protection paths in one monolithic array |
| Capacitance (CIN) | 7 pF typical per channel - preserves signal integrity in USB 2.0 and SDIO interfaces |
| Differential Capacitance | 0.19 pF typical - minimizes crosstalk and timing skew between adjacent lines |
| Reverse Stand-off Voltage | 5.5 V min - ensures no conduction during normal 5 V rail operation |
| ESD Withstand (IEC 61000−4−2) | ±15 kV contact discharge - meets industrial and consumer immunity requirements |
| HBM ESD Rating | ±30 kV - exceeds JEDEC JS-001 Class 3B for handling robustness |
| Clamp Voltage (I = ±10 mA) | +6.8 V / −0.8 V - limits transient overvoltage to safe levels for downstream ICs |
Pinout & Package
SOT-563 (Case 463A), 1.60 × 1.60 × 0.55 mm, 6-pin surface-mount package with exposed pad option not specified; RoHS-compliant and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (CH1) | ESD protection path for first I/O line; connects to protected signal trace |
| 2 | Anode (VN) | Common anode node; must be tied to system ground plane for all channels |
| 3 | Cathode (CH2) | ESD protection path for second I/O line; isolated from CH1 electrically |
| 4 | Cathode (CH3) | ESD protection path for third I/O line; shares VN but independent clamping |
| 5 | Cathode (CH4) | ESD protection path for fourth I/O line; enables 4-line protection in same footprint |
| 6 | Cathode (CH5) | ESD protection path for fifth I/O line; completes full 5-channel array functionality |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low channel capacitance | 7 pF typical - enables use in 480 Mbps USB 2.0 without eye diagram degradation |
| Multi-strike endurance | Withstands >1000 ESD strikes per pin - supports manufacturing handling and field reliability |
| Compact 6-pin layout | SOT-563 footprint (1.6 × 1.6 mm) - saves >50% board area vs. discrete diode solutions |
| High-level ESD immunity | ±15 kV IEC contact / ±30 kV HBM - exceeds IEC 61000-4-2 Level 4 and JEDEC Class 3B |
| Pb-free construction | RoHS-compliant SOT-563 package - meets global environmental compliance mandates |
Applications
| USB 2.0 Interface Protection | HDMI DDC/CEC Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− data lines, VBUS sense, ID pin, and optional auxiliary signal in smartphone docking connectors. IC Role / Device Role / Timing Role: Clamp-mode TVS array providing bidirectional ESD suppression before signal enters USB transceiver IC. Use Value: Prevents latch-up or gate oxide damage in USB PHYs during hot-plug events while adding <0.1 mm² PCB area. | Use Scenario: Hardening HDMI Display Data Channel (DDC) and Consumer Electronics Control (CEC) pins against user-handling ESD in TVs and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance shunt protector placed directly at HDMI connector to divert ESD before reaching level-shifter or microcontroller GPIO. Use Value: Maintains DDC clock stability (≤100 kHz) and CEC signal fidelity with <0.2 pF added capacitance per line. |
| SD Card Interface Protection | Industrial Sensor Bus Protection |
Use Scenario: Securing SDIO command, clock, and data lines (CMD, CLK, DAT0–DAT3) in handheld medical devices and portable test equipment. IC Role / Device Role / Timing Role: 5-channel ESD array matching SDIO's 4-bit bus + CMD line topology, grounded via shared VN pin. Use Value: Enables 25 MB/s SDHC transfer rates by limiting total added capacitance to <35 pF across all five lines. | Use Scenario: Protecting RS-485/RS-422 differential pairs and control lines (DE/RE) in factory automation I/O modules exposed to harsh ESD environments. IC Role / Device Role / Timing Role: Multi-line TVS array deployed at connector entry point to absorb contact discharges before transceiver inputs. Use Value: Guarantees 5.5 V stand-off margin above 5 V supply rails while surviving repeated ±15 kV ESD events without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | 4-channel, 0.5 pF per channel, 5 V stand-off, SC70-6 package | Lacks fifth channel; lower capacitance suits >1 Gbps interfaces but insufficient for 5-line SDIO | Select when only four lines require protection and sub-1 pF is mandatory for USB 3.0 Gen1 |
| ESD5Z5.0T1G | Single-channel, 5.0 V stand-off, SOD-523, 15 kV IEC rating | Requires five discrete units; increases layout area and assembly cost vs. integrated array | Choose only if board space allows discrete placement and BOM simplification outweighs performance trade-offs |
Compared with TPD2E001DRYR and ESD5Z5.0T1G, the CM1218-05SE uniquely delivers five matched, low-capacitance protection paths in a single 1.6 mm² footprint-enabling compact SDIO, multi-lane USB, or sensor hub designs where channel count, size, and consistency are critical.
Availability
CM1218-05SE is available at Aetrix Electronics and suitable for high-speed consumer electronics, industrial sensor interfaces, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for CM1218-05SE 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 connectivity solutions for automotive, industrial, cloud, and consumer markets.
The CM1218-05SE belongs to onsemi's low-capacitance TVS array product line, engineered specifically for ESD hardening of high-speed digital interfaces-including USB, HDMI, SDIO, and industrial buses-where signal fidelity and board space are constrained.
FAQ
What is the maximum operating temperature range for the CM1218-05SE?
The CM1218-05SE is rated for continuous operation from −40°C to +85°C, aligning with commercial and extended industrial ambient conditions. This range is validated across all electrical parameters including leakage current, clamp voltage, and ESD withstand capability, ensuring reliable performance in portable electronics and edge-sensor applications where thermal cycling occurs.
Does the CM1218-05SE require external biasing or control signals?
No, the CM1218-05SE operates passively as a clamping TVS array with no external bias, enable pins, or control logic. It functions solely through its internal avalanche diode structure-conducting only during overvoltage transients-and draws zero quiescent current during normal 5 V operation, making it ideal for always-on battery-powered systems using CM1218-05SE.
Can the CM1218-05SE be used for protecting 3.3 V logic interfaces?
Yes, the CM1218-05SE's 5.5 V minimum reverse stand-off voltage provides adequate margin above 3.3 V nominal rails, and its ±0.8 V negative clamp ensures no forward conduction during valid logic-low states. Verified leakage current of ≤1 µA at 3.3 V confirms compatibility with CMOS and TTL I/O without affecting noise margins or power budget in designs using CM1218-05SE.
How does the CM1218-05SE compare to discrete TVS diodes in terms of PCB layout efficiency?
The CM1218-05SE replaces five discrete 0402 or SOD-523 TVS diodes with a single 1.6 × 1.6 mm SOT-563 package, reducing layout area by >60%, eliminating five separate ground vias, and guaranteeing matched capacitance and clamping characteristics across all five channels-critical for maintaining timing alignment in parallel buses protected by CM1218-05SE.
Is the CM1218-05SE compatible with lead-free reflow soldering processes?
Yes, the CM1218-05SE is Pb-free and qualified for standard lead-free reflow profiles per J-STD-020, including peak temperatures up to 260°C. Its SOT-563 package uses matte tin plating and passes MSL Level 1 rating, allowing unlimited floor life and compatibility with automated SMT assembly lines handling CM1218-05SE in high-volume production.
CM1218-05SE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CM1218-05SE FAQ
1.How can I place an order for CM1218-05SE through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1218-05SE 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 CM1218-05SE reliable?
The price and inventory of CM1218-05SE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1218-05SE is usually 5 days.
3.What payment methods are accepted for CM1218-05SE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1218-05SE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1218-05SE?
CM1218-05SE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1218-05SE 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 CM1218-05SE?
For technical support, including CM1218-05SE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1218-05SE requirements.
6.How does Aetrix verify that CM1218-05SE is sourced from the original manufacturer or authorized distributors?
All CM1218-05SE 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 CM1218-05SE meets industry standards.
7.What is the process for return or replacement of CM1218-05SE?
All CM1218-05SE units undergo pre-shipment inspection (PSI). If there is an issue with CM1218-05SE, 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 CM1218-05SE part is unused and in its original packaging.
Return procedure for CM1218-05SE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1218-05SE Tags
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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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