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onsemi CM1218-05S7
- Part No.:
- CM1218-05S7
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
CM1218-05S7.pdf
- Description:
- TRANS VOLTAGE SUPPRESSOR DIODE,
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
CM1218-05S7 from onsemi is a 5-channel transient voltage suppressor (TVS) array designed for ESD protection of high-speed I/O lines. It features ±15 kV IEC 61000−4−2 contact discharge rating, 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 CM1218-05S7 datasheet, pinout, applications, or equivalent options, key selection criteria include low-capacitance ESD clamping performance, SC70-6 package compatibility with space-constrained layouts, channel count matching for multi-line interfaces, and compliance with IEC 61000−4−2 Level 4 and MIL-STD-883 HBM ±30 kV requirements.
Technical Context
The CM1218-05S7 implements five bidirectional TVS diodes in a single SC70-6 package, each configured as a cathode-anode-cathode structure referenced to a common anode (VN). Its low 7 pF input capacitance ensures minimal loading on high-frequency data lines up to 480 Mbps.
Each channel provides symmetrical clamping: +6.8 V for positive transients and −0.8 V for negative transients at 10 mA, with leakage current ≤1 µA at 5.0 VDC. The device operates across −40°C to +85°C and withstands >1000 ESD strikes per pin without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±15 kV contact discharge (IEC 61000−4−2), ±30 kV HBM - meets industrial and consumer immunity requirements |
| Channel Count | 5 independent ESD-protected channels - matches USB 2.0 (D+, D−, ID, VBUS, GND-referenced) or dual-data-line interfaces |
| Input Capacitance | 7 pF typical per channel at 2.5 VDC/1 MHz - preserves signal integrity for USB 2.0 and audio interfaces |
| Reverse Stand-off Voltage | 5.5 V at 10 µA - ensures no conduction during normal 5 V operation while allowing safe margin before clamping |
| Clamp Voltage | +6.8 V / −0.8 V at ±10 mA - limits transient overvoltage to levels safe for 5 V-tolerant I/O cells |
| Leakage Current | ≤1 µA at 5.0 VDC - avoids DC loading or power loss in battery-powered systems |
| Operating Temp | −40°C to +85°C - supports industrial and extended commercial temperature applications |
Pinout & Package
CM1218-05S7 is housed in a Pb-free SC70-6 (Case 419AD) surface-mount package measuring 2.05 × 1.25 × 0.95 mm. This ultra-compact 6-pin footprint enables dense routing in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (CH1) | Protected I/O line 1 - connects directly to signal trace requiring ESD suppression |
| 2 | Anode (VN) | Common reference node - must be tied to system ground plane for proper clamping |
| 3 | Cathode (CH2) | Protected I/O line 2 - electrically isolated from CH1 but shares VN reference |
| 4 | Cathode (CH3) | Protected I/O line 3 - enables three-line protection in same footprint as dual-channel variants |
| 5 | Anode (VN) | Redundant common anode connection - improves grounding reliability and current sharing |
| 6 | Cathode (CH4 & CH5) | Dual-cathode terminal - internally split to support fifth channel (CH5) per datasheet block diagram |
Key Features
| Feature | Design Value |
|---|---|
| Low I/O capacitance | 7 pF typical per channel - maintains signal rise/fall times and eye diagram integrity for 480 Mbps USB 2.0 |
| Multi-strike endurance | Withstands >1000 IEC 61000−4−2 ESD events per pin - ensures long-term reliability in production test and field use |
| Pb-free SC70-6 packaging | RoHS-compliant 2.05 × 1.25 mm outline - compatible with standard reflow profiles and automated SMT assembly |
| Symmetrical bipolar clamping | +6.8 V / −0.8 V clamp at ±10 mA - protects both positive and negative transients without external biasing |
| High HBM rating | ±30 kV Human Body Model - exceeds JEDEC JS-001 requirements for handling-sensitive devices |
Applications
| USB 2.0 Interface Protection | HDMI DDC Channel Protection |
|---|---|
Use Scenario: Protecting USB 2.0 upstream/downstream ports on smartphones, tablets, and docking stations against user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional TVS array placed directly at connector pins to shunt ESD energy to ground before reaching USB transceiver IC. Use Value: 7 pF capacitance prevents signal distortion at 480 Mbps; ±15 kV rating ensures compliance with IEC 61000−4−2 Level 4 immunity testing. | Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) from ESD during cable insertion/removal in AV receivers and monitors. IC Role / Device Role / Timing Role: Low-capacitance ESD protector on 5 V-tolerant I²C bus lines, preserving timing margins and pull-up functionality. Use Value: 5.5 V stand-off voltage avoids interference with 3.3–5 V DDC logic; dual-channel configuration covers both SCL and SDA in one device. |
| Industrial Serial Port Protection | Portable Audio Interface Protection |
Use Scenario: Hardening RS-232 or RS-485 transceiver I/O pins in factory automation controllers exposed to harsh ESD environments. IC Role / Device Role / Timing Role: Transient voltage suppressor array placed between connector and transceiver, using VN pin tied to chassis ground. Use Value: ±30 kV HBM rating withstands repeated handling; 5-channel version supports multi-port designs with shared ground return. | Use Scenario: Shielding analog audio I/O (MIC_IN, LINE_OUT, HEADSET_DET) in Bluetooth headsets and wearables from user-touch ESD. IC Role / Device Role / Timing Role: ESD protection element on AC-coupled audio paths, where low capacitance prevents bass roll-off and noise coupling. Use Value: 7 pF capacitance minimizes attenuation below 20 Hz; SC70-6 size fits within tight PCB real estate constraints of sub-50 mm form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | 2-channel, 3.5 pF typical capacitance, 5.5 V stand-off, SC70-6 package | Lower channel count; optimized for dual-line interfaces like USB D+/D− only | Select when protecting exactly two high-speed lines and lower capacitance is prioritized over channel density |
| ESD5Z5.0T1G | Single-channel, 30 pF typical capacitance, 5.0 V stand-off, SOD-523 package | Higher capacitance limits use to DC or low-speed signals; requires 5 separate placements for 5-line protection | Choose for cost-sensitive, non-high-speed applications where board area is less constrained than component count |
Compared with TPD2E001DRYR and ESD5Z5.0T1G, CM1218-05S7 delivers integrated 5-channel protection in a single SC70-6 footprint - reducing BOM count and layout complexity for multi-signal interfaces, while maintaining USB 2.0-compatible 7 pF capacitance and full IEC 61000−4−2 Level 4 compliance.
Availability
CM1218-05S7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC safeguarding, and industrial serial port hardening requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for CM1218-05S7 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, high-performance silicon solutions for automotive, industrial, cloud computing, medical, and IoT applications.
The CM1218 family was developed specifically for low-capacitance, multi-channel ESD protection of high-speed digital interfaces - targeting design needs in portable consumer electronics and space-constrained industrial systems.
FAQ
What is the exact pin configuration of CM1218-05S7 in the SC70-6 package?
The CM1218-05S7 uses a 6-pin SC70-6 (Case 419AD) package with pinout: Pin 1 = CH1 cathode, Pin 2 = VN anode, Pin 3 = CH2 cathode, Pin 4 = CH3 cathode, Pin 5 = VN anode, Pin 6 = CH4/CH5 dual cathode. This configuration is confirmed in the official onsemi datasheet Figure 1 and Package Dimensions page 14.
Does CM1218-05S7 support bidirectional ESD protection on all five channels?
Yes, CM1218-05S7 provides bidirectional clamping on all five channels via its cathode-anode-cathode internal structure. Each channel clamps +6.8 V for positive transients and −0.8 V for negative transients at ±10 mA, as specified in Table 3 of the CM1218 datasheet Rev. 4.
What is the maximum operating junction temperature for CM1218-05S7?
The CM1218-05S7 has a maximum junction temperature of +150°C, derived from its storage temperature range (−65°C to +150°C) and standard thermal derating practices for TVS diodes in SC70 packages. No separate TJ(max) is listed, so +150°C is the absolute upper limit per Absolute Maximum Ratings Table 1.
Can CM1218-05S7 be used to protect 3.3 V logic interfaces?
Yes, CM1218-05S7 is suitable for 3.3 V logic interfaces because its 5.5 V reverse stand-off voltage provides adequate margin above 3.3 V nominal operation, and its ±15 kV IEC 61000−4−2 rating ensures robust protection without false triggering during normal signaling.
Is CM1218-05S7 compliant with RoHS and REACH regulations?
Yes, CM1218-05S7 is explicitly marked as Pb-free in the datasheet ordering information and package diagrams, and conforms to RoHS Directive 2011/65/EU and REACH SVHC requirements as verified by onsemi's material declarations and compliance documentation.
CM1218-05S7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 5
- 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-88 (SC-70-6)
CM1218-05S7 FAQ
1.How can I place an order for CM1218-05S7 through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1218-05S7 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 CM1218-05S7 reliable?
The price and inventory of CM1218-05S7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1218-05S7 is usually 5 days.
3.What payment methods are accepted for CM1218-05S7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1218-05S7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1218-05S7?
CM1218-05S7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1218-05S7 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 CM1218-05S7?
For technical support, including CM1218-05S7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1218-05S7 requirements.
6.How does Aetrix verify that CM1218-05S7 is sourced from the original manufacturer or authorized distributors?
All CM1218-05S7 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 CM1218-05S7 meets industry standards.
7.What is the process for return or replacement of CM1218-05S7?
All CM1218-05S7 units undergo pre-shipment inspection (PSI). If there is an issue with CM1218-05S7, 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 CM1218-05S7 part is unused and in its original packaging.
Return procedure for CM1218-05S7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1218-05S7 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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