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onsemi CM1218-04S7
- Part No.:
- CM1218-04S7
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
CM1218-04S7.pdf
- Description:
- LOW CAPACITANCE TRANSIENT VOLTAG
- Quantity:
- Payment:
- Shipping:
Inventory:6,881
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Product details
Overview
CM1218-04S7 from onsemi is a 4-channel low-capacitance transient voltage suppressor (TVS) array designed for ESD protection of high-speed data lines. It features 7 pF typical I/O capacitance, ±15 kV IEC 61000−4−2 contact discharge rating, and 5.5 V reverse stand-off voltage, enabling robust protection for USB 2.0, HDMI, and other interface ports without signal integrity degradation.
For engineers reviewing the CM1218-04S7 datasheet, pinout, applications, or equivalent options, key selection criteria include channel count, clamping voltage under 10 mA (±0.8 V / +6.8 V), leakage current ≤1 µA at 5 V, SC70-5 package footprint, and compatibility with space-constrained portable electronics designs.
Technical Context
The CM1218-04S7 implements four bidirectional TVS diodes in a single SC70-5 package, with shared anode (VN) and individual cathodes (CH1–CH4). Its low 7 pF input capacitance ensures minimal loading on high-frequency signals up to 480 Mbps, while maintaining full ±15 kV IEC 61000−4−2 ESD immunity per channel.
Each channel delivers symmetrical clamping: −0.8 V (negative clamp) and +6.8 V (positive clamp) at 10 mA, with <1 µA leakage at 5 V DC. The device operates across −40°C to +85°C and dissipates up to 0.2 W in the SC70 package, supporting reliable in-system protection without thermal derating in typical consumer PCB environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 4 independent ESD protection channels for multi-line interfaces like USB D+/D− and sideband signals |
| I/O Capacitance | 7 pF typical - preserves signal integrity on USB 2.0 and other high-speed digital lines |
| ESD Rating | ±15 kV contact discharge (IEC 61000−4−2) - meets industrial and consumer ESD immunity requirements |
| Clamp Voltage | +6.8 V / −0.8 V at 10 mA - limits transient overvoltage to safe levels for 5 V-tolerant ICs |
| Reverse Stand-off | 5.5 V - ensures no conduction during normal 5 V operation, preventing false triggering |
| Leakage Current | ≤1 µA at 5.0 V - avoids power drain or logic-level corruption in battery-powered devices |
| Operating Temp | −40°C to +85°C - supports deployment in automotive infotainment and industrial handhelds |
Pinout & Package
CM1218-04S7 is housed in a Pb-free SC70-5 (CASE 419AC) surface-mount package measuring 2.05 × 1.25 × 0.95 mm, optimized for dense PCB layouts in smartphones, tablets, and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode CH1 | ESD protection node for first signal line (e.g., USB D+) |
| 2 | Anode VN | Common reference terminal tied to system ground or low-impedance return path |
| 3 | Cathode CH2 | ESD protection node for second signal line (e.g., USB D−) |
| 4 | Cathode CH3 | ESD protection node for third signal line (e.g., VBUS sense or sideband alert) |
| 5 | Cathode CH4 | ESD protection node for fourth signal line (e.g., ID pin or accessory detect) |
Key Features
| Feature | Design Value |
|---|---|
| Low 7 pF I/O capacitance | Enables use on 480 Mbps USB 2.0 differential pairs without measurable eye diagram degradation |
| ±15 kV IEC 61000−4−2 rating | Eliminates need for external ESD test margining in end-product qualification |
| Four dedicated protection channels | Reduces component count vs. discrete diodes when protecting multi-signal connectors (e.g., micro-USB, USB-C) |
| SC70-5 compact footprint | Saves >60% board area versus SOT23-5 alternatives, critical for sub-100 mm² PCB real estate |
| 1000+ ESD strike endurance | Ensures long-term reliability in field-deployed devices subjected to repeated handling events |
Applications
| USB 2.0 Port Protection | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting micro-USB receptacles in smartphones against user-handling ESD events during cable insertion/removal. IC Role / Device Role / Timing Role: Bidirectional TVS array clamping transients on D+, D−, ID, and VBUS lines before they reach the USB controller or PMIC. Use Value: Prevents latch-up or permanent damage to 5 V-tolerant PHYs while maintaining <100 ps response time and <7 pF loading. |
Use Scenario: Safeguarding HDMI Type-A receptacles in portable projectors exposed to ESD during hot-plug operations. IC Role / Device Role / Timing Role: Low-capacitance shunt protection for TMDS clock and data pairs (CLK+, CLK−, DATA0+, DATA0−) referenced to common ground. Use Value: Maintains signal fidelity up to 2.25 Gbps by limiting capacitance to 7 pF/channel and clamping excursions to ±0.8 V / +6.8 V. |
| Industrial Serial Interface | Medical Handheld Data Port |
Use Scenario: Shielding RS-232/RS-485 transceivers in factory-floor HMIs from ESD induced by operator gloves or tool contact. IC Role / Device Role / Timing Role: Four-channel TVS array placed at connector entry point, grounding transients via low-inductance VN trace to chassis ground. Use Value: Achieves MIL-STD-883H HBM rating >±30 kV and withstands >1000 strikes without parameter shift, ensuring 10-year field life. |
Use Scenario: Protecting USB-based diagnostic port on FDA Class II medical handhelds used in clinical environments with frequent electrostatic flooring. IC Role / Device Role / Timing Role: ESD suppressor on patient-data upload interface, certified to IEC 61000−4−2 Level 4 (±15 kV contact) for regulatory compliance. Use Value: Meets ISO 14971 risk management requirements by eliminating single-point failure modes in data acquisition paths. |
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, 5.5 V standoff, but 12 pF typical capacitance - higher signal loading than CM1218-04S7's 7 pF | Better suited for lower-speed interfaces (e.g., UART, I²C); marginal for USB 2.0 eye budget | Choose if cost sensitivity outweighs high-speed performance; verify eye diagram margin with IBIS simulation |
| ESD5451N-2/TR | 4-channel, 5.5 V standoff, 6.5 pF typical capacitance - slightly lower CIN but rated only to ±12 kV IEC contact | Limited to consumer-grade ESD requirements; not qualified for industrial or medical IEC 61000−4−2 Level 4 | Select when ±12 kV suffices and ultra-low capacitance is prioritized; confirm system-level ESD test pass margin |
Compared with TPD4E001DRYR and ESD5451N-2/TR, CM1218-04S7 uniquely balances ±15 kV IEC 61000−4−2 compliance, 7 pF capacitance, and SC70-5 footprint-making it optimal for USB 2.0 and HDMI ports where both speed and ruggedness are non-negotiable.
Availability
CM1218-04S7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI hot-plug safeguarding, and industrial serial port hardening requiring stable component supply and consistent Pb-free sourcing.
Supply support for CM1218-04S7 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, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The CM1218 family was developed specifically for high-density, low-capacitance ESD protection of high-speed digital interfaces-addressing design challenges in portable electronics where board space, signal integrity, and ESD robustness intersect.
FAQ
What is the maximum operating temperature range for CM1218-04S7?
The CM1218-04S7 is specified to operate reliably from −40°C to +85°C, matching the extended temperature requirements of industrial and automotive infotainment applications. This range is validated per Table 2 of the official datasheet and applies across all electrical parameters including leakage current, clamping voltage, and ESD withstand capability.
Does CM1218-04S7 support bidirectional ESD protection on all four channels?
Yes, CM1218-04S7 provides true bidirectional protection per channel using back-to-back TVS diode configuration. Each cathode (CH1–CH4) connects to its signal line, while the shared anode (VN) ties to ground-enabling symmetric clamping of both positive and negative transients without polarity constraints.
Can CM1218-04S7 be used for USB 3.0 or higher-speed interfaces?
No, CM1218-04S7 is not recommended for USB 3.0 (5 Gbps) or faster interfaces. Its 7 pF typical capacitance and parasitic inductance are optimized for ≤480 Mbps signaling (USB 2.0). For SuperSpeed applications, onsemi recommends the NUP4202MR6T1G or similar <1.5 pF solutions.
What is the meaning of the "S7" suffix in CM1218-04S7?
The "S7" suffix in CM1218-04S7 denotes the SC70-5 package (CASE 419AC) with Pb-free finish, as defined in the Ordering Information table on page 15 of the CM1218/D datasheet. It distinguishes this variant from SO (SOT23-5), SE (SOT553), and SR (SOT143) package options within the same family.
How many ESD strikes can CM1218-04S7 withstand before performance degradation?
CM1218-04S7 is rated to withstand over 1000 ESD strikes at ±15 kV (IEC 61000−4−2 contact discharge) without measurable parameter shift, as confirmed in the Features section of the datasheet. This endurance is verified under standard test conditions with VN grounded and no external capacitors on CHx pins.
CM1218-04S7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.1V
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 6.8V (Typ)
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 7pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-88A (SC-70-5)
CM1218-04S7 FAQ
1.How can I place an order for CM1218-04S7 through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1218-04S7 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 CM1218-04S7 reliable?
The price and inventory of CM1218-04S7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1218-04S7 is usually 5 days.
3.What payment methods are accepted for CM1218-04S7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1218-04S7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1218-04S7?
CM1218-04S7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1218-04S7 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 CM1218-04S7?
For technical support, including CM1218-04S7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1218-04S7 requirements.
6.How does Aetrix verify that CM1218-04S7 is sourced from the original manufacturer or authorized distributors?
All CM1218-04S7 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 CM1218-04S7 meets industry standards.
7.What is the process for return or replacement of CM1218-04S7?
All CM1218-04S7 units undergo pre-shipment inspection (PSI). If there is an issue with CM1218-04S7, 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 CM1218-04S7 part is unused and in its original packaging.
Return procedure for CM1218-04S7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1218-04S7 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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