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onsemi CM1248-04QG
- Part No.:
- CM1248-04QG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 6-UFDFN
- Datasheet:
-
CM1248-04QG.pdf
- Description:
- TVS DIODE 6.1VWM 6.8VC 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,441
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Product details
Overview
CM1248-04QG from onsemi is a low-capacitance ESD protection diode array designed for high-speed data lines, featuring 10 pF I/O capacitance at 0 V, ±15 kV contact ESD immunity per IEC 61000-4-2, and 5.5 V reverse standoff voltage; it protects four bidirectional signal paths in space-constrained USB 2.0, HDMI, or MHL interfaces.
For engineers reviewing the CM1248-04QG datasheet, pinout, applications, or equivalent options, key selection criteria include channel capacitance ≤10 pF, ESD robustness ≥±15 kV contact, leakage current <0.75 µA at 5 V, and uDFN-6 package compatibility with fine-pitch layout requirements.
Technical Context
This device implements a quad-channel unidirectional ESD protection architecture with common-anode (VN) configuration, where each CHx pin serves as cathode for transient clamping to ground. It operates across −40°C to +85°C and maintains stable capacitance down to 0.19 pF differential at 2.5 V bias.
The diode array delivers fast response to ESD transients via low dynamic resistance (0.57 Ω forward, 1.36 Ω reverse) and clamps positive surges to 6.8 V and negative surges to −0.89 V at 10 mA, enabling reliable protection without signal distortion in high-bandwidth interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I/O Capacitance | 10 pF at 0 V - preserves signal integrity on USB 2.0/480 Mbps and HDMI 1.4a channels |
| ESD Withstand Voltage | ±15 kV contact discharge - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| Reverse Stand-off Voltage | 5.5 V - ensures no conduction during normal 5 V or 3.3 V signal operation |
| Leakage Current | 0.75 µA max at 5 V - avoids loading of high-impedance receivers in portable devices |
| Clamp Voltage (Positive) | 6.8 V at 10 mA - limits voltage overshoot below IC absolute maximum ratings |
| Clamp Voltage (Negative) | −0.89 V at −10 mA - prevents negative excursion beyond receiver input range |
| Operating Temperature | −40°C to +85°C - supports industrial and consumer end equipment deployment |
Pinout & Package
CM1248-04QG is housed in a 6-pin uDFN package (Case 517BM), measuring 1.25 mm × 1.00 mm × 0.40 mm with 0.4 mm pitch and exposed thermal pad. The compact footprint enables placement adjacent to connectors in ultra-thin mobile designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CH1) | Cathode of Channel 1 ESD diode | Connected to protected signal line 1; clamps transients to VN when voltage exceeds VRSO |
| Pin 2 (VN) | Common anode node | Must be connected to system ground; serves as return path for all four ESD channels |
| Pin 3 (CH2) | Cathode of Channel 2 ESD diode | Connected to protected signal line 2; shares VN with CH1–CH4 for coordinated clamping |
| Pin 4 (CH3) | Cathode of Channel 3 ESD diode | Connected to protected signal line 3; enables independent routing while sharing ground reference |
| Pin 5 (VN) | Common anode node (duplicate) | Second VN terminal for improved grounding continuity and lower inductance path to GND |
| Pin 6 (CH4) | Cathode of Channel 4 ESD diode | Connected to protected signal line 4; completes quad-channel protection set for differential pairs |
Key Features
| Feature | Design Value |
|---|---|
| Low I/O capacitance | 10 pF at 0 V - minimizes insertion loss and phase distortion on 480 Mbps USB 2.0 data lanes |
| IEC 61000-4-2 compliance | ±15 kV contact discharge - eliminates need for external ESD test rework in final system validation |
| High ESD strike endurance | 1000+ ESD events per I/O pin - ensures long-term reliability in manufacturing handling and field use |
| RoHS-compliant uDFN-6 | Pb-free, halogen-free package - satisfies global environmental compliance without solderability trade-offs |
| Common-anode quad configuration | Single VN ground connection for all four channels - simplifies PCB layout and reduces ground loop risk |
Applications
| USB 2.0 Interface Protection | HDMI 1.4a Data Lane Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines in smartphone USB OTG ports against electrostatic discharge during cable insertion. IC Role / Device Role / Timing Role: ESD transient suppressor placed within 2 mm of USB connector, clamping surges before they reach PHY transceiver. Use Value: Prevents latch-up and permanent damage to USB PHY ICs while maintaining 480 Mbps eye diagram integrity due to 10 pF capacitance. | Use Scenario: Safeguarding TMDS clock and data channels in portable media players connecting to HDMI displays. IC Role / Device Role / Timing Role: Quad-channel bidirectional clamp positioned at HDMI receptacle, referenced to clean system ground via dual VN pins. Use Value: Enables full HDMI 1.4a compliance with <0.2 pF differential capacitance contribution, avoiding pixel jitter or color shift. |
| MHL Interface Protection | Mobile Display Serial Interface (DSI) |
Use Scenario: Shielding MHL Alt Mode lanes on USB-C ports in tablets during hot-plug events with up to ±15 kV ESD stress. IC Role / Device Role / Timing Role: Low-capacitance ESD array placed between Type-C connector and MHL transceiver, using shared VN for minimal trace inductance. Use Value: Maintains MHL 3.0 6 Gbps signal fidelity with sub-10 pF loading and clamps transients to safe levels below receiver breakdown thresholds. | Use Scenario: Protecting high-speed DSI data lanes between AP and AMOLED display in foldable smartphones. IC Role / Device Role / Timing Role: Compact uDFN-6 ESD device mounted directly at display flex connector, leveraging 1.25 mm × 1.00 mm footprint for tight board real estate. Use Value: Delivers robust ±15 kV ESD immunity without degrading 2.5 Gbps DSI eye opening, validated per JEDEC JESD22-A114F. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E001DRYR | 12 pF typical capacitance; ±12 kV contact ESD rating; same uDFN-6 package | Slightly higher capacitance may limit use in >480 Mbps interfaces; lower ESD margin requires tighter system-level margining | Preferred where cost sensitivity outweighs marginal bandwidth loss and ESD headroom reduction |
| ESD5451N-2/TR | 6.5 V VRWM; 0.5 pF typical capacitance; SOT-563 package (larger footprint) | Lower capacitance suits 10 Gbps+ interfaces but larger SOT-563 complicates ultra-dense layouts | Selected when ultra-low capacitance is critical and board space allows 2.1 mm × 1.35 mm footprint |
Compared with TPD4E001DRYR and ESD5451N-2/TR, the CM1248-04QG offers optimal balance of 10 pF capacitance, ±15 kV ESD rating, and 1.25 mm × 1.00 mm uDFN-6 size-making it ideal for USB 2.0 and HDMI 1.4a implementations where layout density and system-level ESD pass-fail margin are both constrained.
Availability
CM1248-04QG is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI 1.4a data lane safeguarding, and MHL Alt Mode implementation requiring stable component supply across high-volume consumer electronics production.
Supply support for CM1248-04QG 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 power, analog, sensor, and logic solutions for automotive, industrial, cloud, medical, and IoT applications.
The CM1248-04QG belongs to onsemi's ESD protection diode family engineered specifically for high-speed serial interface protection, emphasizing low capacitance, high ESD robustness, and ultra-compact packaging for mobile and portable electronics.
FAQ
What is the maximum operating temperature range for the CM1248-04QG?
The CM1248-04QG is rated for continuous operation from −40°C to +85°C, as specified in Table 3 of its official datasheet. This range supports deployment in consumer handhelds, automotive infotainment displays, and industrial HMIs where ambient temperatures vary widely. Thermal performance remains stable across this span, with no derating required for ESD clamping voltage or leakage current.
Does the CM1248-04QG support bidirectional signal protection?
Yes, the CM1248-04QG provides bidirectional ESD protection through its common-anode architecture: each CHx pin functions as a cathode for positive transients and leverages the internal diode junction for negative clamping to VN. This enables full protection of AC-coupled differential signals like USB D+/D− without polarity constraints, confirmed by its ±15 kV IEC 61000-4-2 rating.
How many ESD strike cycles can the CM1248-04QG withstand per channel?
The CM1248-04QG is characterized to withstand over 1000 ESD strikes per I/O pin under IEC 61000-4-2 contact discharge conditions, as stated in its features list. This endurance is verified at ±15 kV and ensures long-term reliability in manufacturing environments and end-user handling scenarios without degradation in clamping voltage or leakage performance.
What is the significance of the dual VN pins (Pins 2 and 5) on the CM1248-04QG?
The dual VN pins (Pins 2 and 5) on the CM1248-04QG provide redundant low-inductance paths to system ground, reducing impedance in the ESD current return path during transient events. This design lowers overall clamping impedance and improves consistency across all four channels, especially critical in high-frequency applications such as HDMI and MHL where ground bounce could compromise protection effectiveness.
Is the CM1248-04QG RoHS compliant and lead-free?
Yes, the CM1248-04QG is Pb-free and fully RoHS compliant, as explicitly stated in its features and marking diagram documentation. It uses standard SnAgCu (SAC305) solder compatibility and conforms to JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), enabling standard reflow profiles without special handling requirements.
CM1248-04QG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 6-UFDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.1V (Min)
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UDFN (1.25x1)
CM1248-04QG FAQ
1.How can I place an order for CM1248-04QG through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1248-04QG 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 CM1248-04QG reliable?
The price and inventory of CM1248-04QG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1248-04QG is usually 5 days.
3.What payment methods are accepted for CM1248-04QG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1248-04QG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1248-04QG?
CM1248-04QG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1248-04QG 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 CM1248-04QG?
For technical support, including CM1248-04QG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1248-04QG requirements.
6.How does Aetrix verify that CM1248-04QG is sourced from the original manufacturer or authorized distributors?
All CM1248-04QG 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 CM1248-04QG meets industry standards.
7.What is the process for return or replacement of CM1248-04QG?
All CM1248-04QG units undergo pre-shipment inspection (PSI). If there is an issue with CM1248-04QG, 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 CM1248-04QG part is unused and in its original packaging.
Return procedure for CM1248-04QG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1248-04QG 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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