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onsemi CM1248-08DE
- Part No.:
- CM1248-08DE
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
CM1248-08DE.pdf
- Description:
- TVS DIODE 6.1VWM 6.8VC 8-UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,132
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Product details
Overview
CM1248-08DE from onsemi is an 8-channel low-capacitance ESD protection diode array designed for high-speed data lines. It delivers 10 pF typical input capacitance at 0 V, ±15 kV IEC 61000-4-2 contact ESD protection, and 5.5 V reverse standoff voltage, enabling robust transient suppression in USB 2.0, HDMI, and MIPI interfaces.
For engineers reviewing the CM1248-08DE datasheet, pinout, applications, or equivalent options, key selection criteria include channel count (8), ultra-low capacitance (≤15 pF), IEC-compliant ESD rating, VN-anode common configuration, and uDFN-8 package footprint compatibility with space-constrained PCB layouts.
Technical Context
The CM1248-08DE integrates eight unidirectional TVS diodes with a shared anode (VN) and individual cathodes (CH1–CH8), forming a common-anode array optimized for bidirectional signal line protection. Its architecture supports simultaneous clamping of multiple high-speed I/Os without inter-channel coupling.
It operates across −40°C to +85°C, maintains ≤0.75 µA leakage at 5.0 V, and achieves 6.8 V positive clamp voltage at 10 mA, ensuring minimal signal distortion during ESD events while preserving signal integrity in differential and single-ended applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 8 independent ESD protection channels (CH1–CH8) |
| Input Capacitance | 10 pF typical at 0 V, 1 MHz - enables <1 Gbps data rate compatibility |
| ESD Rating | ±15 kV contact discharge per IEC 61000-4-2 - meets industrial and consumer immunity requirements |
| Reverse Standoff Voltage | 5.5 V at IR = 10 µA - ensures no conduction during normal 5 V operation |
| Clamp Voltage | 6.8 V (positive), −0.89 V (negative) at 10 mA - limits transient overshoot within safe IC input range |
| Leakage Current | 0.75 µA max at 5.0 V - prevents signal loading or power loss in standby |
| Package | uDFN-8, 1.7 mm × 1.35 mm, 0.4 mm pitch - supports fine-pitch routing and miniaturized layouts |
Pinout & Package
CM1248-08DE uses an 8-pin ultra-thin DFN (uDFN-8) package (Case 517BC), measuring 1.7 mm × 1.35 mm with 0.4 mm lead pitch. The die attach pad (DAP) is exposed on the bottom side for thermal enhancement and must be soldered to a thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1–CH8 | Cathode of respective ESD diode | Connected directly to protected I/O lines (e.g., USB D+, D−); clamps transients to VN |
| VN | Common anode node | Must be connected to system ground or local reference plane; serves as clamping return path for all 8 channels |
| DAP | Thermal and electrical ground connection | Exposed copper pad on underside - requires soldering to PCB thermal pad for optimal thermal dissipation and ESD current handling |
Key Features
| Feature | Design Value |
|---|---|
| Low I/O capacitance | 10 pF typical at 0 V - preserves signal rise/fall times in >480 Mbps USB 2.0 links |
| IEC 61000-4-2 compliance | ±15 kV contact discharge - exceeds Level 4 immunity for end-equipment certification |
| ESD strike endurance | 1000+ strikes per channel - supports long-term reliability in field-deployed interfaces |
| Pb-free & RoHS compliant | Meets EU RoHS Directive 2011/65/EU - qualifies for commercial and industrial environmental compliance |
| Space-saving layout | 1.7 mm × 1.35 mm uDFN-8 footprint - reduces board area by >50% vs. SOIC-8 alternatives |
Applications
| USB 2.0 Interface Protection | HDMI Data Lane Protection |
|---|---|
Use Scenario: Protecting upstream/downstream USB 2.0 ports against electrostatic discharge during hot-plug events and handling. IC Role / Device Role / Timing Role: ESD transient suppressor placed between connector and USB PHY, with CH1/CH2 assigned to D+/D− lines and VN grounded. Use Value: 10 pF capacitance avoids signal integrity degradation at 480 Mbps; ±15 kV rating ensures compliance with USB-IF ESD test plans. | Use Scenario: Safeguarding HDMI TMDS clock and data channels from ESD in set-top boxes and display adapters. IC Role / Device Role / Timing Role: Unidirectional clamping array protecting four differential pairs (CH1–CH8 mapped to 4× TMDS lanes), VN tied to chassis ground. Use Value: Sub-1 pF differential capacitance (0.19 pF) minimizes skew and jitter in 2.25 Gbps TMDS signaling. |
| MIPI D-PHY Interface Protection | Industrial Sensor Interface Protection |
Use Scenario: Shielding MIPI D-PHY high-speed data and clock lanes in smartphone camera modules and automotive ADAS sensors. IC Role / Device Role / Timing Role: Channel-mapped ESD array (CH1–CH4 for data lanes, CH5–CH8 for clock/strobe) with VN referenced to clean analog ground. Use Value: 6.8 V positive clamp voltage stays below MIPI receiver absolute maximum ratings, preventing latch-up during ESD events. | Use Scenario: Hardening RS-485, CAN FD, or SPI sensor bus lines in factory automation controllers exposed to harsh ESD environments. IC Role / Device Role / Timing Role: Multi-line transient protector deployed at connector entry point, with each CHx guarding one bus line and VN connected to system ground plane. Use Value: 1000+ ESD strike endurance ensures sustained protection over product lifetime without parameter drift or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD8S300DR | 8-channel, 12 pF typical capacitance, ±12 kV IEC 61000-4-2, SOIC-8 package (4.9 mm × 3.9 mm) | Larger footprint; lower ESD rating; higher capacitance limits use in >200 Mbps links | Preferred where board space allows and legacy SOIC assembly is required |
| ESD8008MUTAG | 8-channel, 15 pF typical capacitance, ±15 kV IEC 61000-4-2, uDFN-8 (1.6 mm × 1.6 mm) | Slightly larger capacitance; identical package size; same ESD rating but higher leakage (1.5 µA) | Valid alternative when minor capacitance increase is acceptable and supply chain diversification is needed |
Compared with TPD8S300DR and ESD8008MUTAG, the CM1248-08DE offers the lowest capacitance (10 pF) in the smallest uDFN-8 footprint (1.7 mm × 1.35 mm), making it optimal for next-generation high-speed, space-constrained interfaces requiring strict signal integrity control.
Availability
CM1248-08DE is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI TMDS lane hardening, and MIPI D-PHY safeguarding requiring stable component supply across production ramps and long-lifecycle programs.
Supply support for CM1248-08DE 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The CM1248-08DE belongs to onsemi's ESD protection portfolio, engineered specifically for high-speed digital interface protection where ultra-low capacitance and compact packaging are critical design constraints.
FAQ
What is the primary function of the CM1248-08DE?
The CM1248-08DE is an 8-channel unidirectional ESD protection diode array with a common anode (VN). Its primary function is to safeguard high-speed data lines-such as USB 2.0, HDMI, and MIPI-from electrostatic discharge transients up to ±15 kV per IEC 61000-4-2, while maintaining signal integrity via ultra-low 10 pF input capacitance.
How is the VN pin used in the CM1248-08DE circuit implementation?
The VN pin on the CM1248-08DE serves as the common anode connection for all eight internal ESD diodes. It must be connected directly to a low-impedance ground reference-typically the system ground plane-to provide a low-resistance return path for clamped ESD current. Improper grounding of VN compromises clamping performance and may cause damage during surge events.
Does the CM1248-08DE support bidirectional signal lines like USB D+ and D−?
Yes, the CM1248-08DE supports bidirectional high-speed signals such as USB D+ and D− through its unidirectional diode architecture: each CHx pin connects to one signal line, and transients are clamped to VN (ground). For true bidirectional protection, VN is grounded, allowing both positive and negative transients to be suppressed-verified by its ±15 kV IEC 61000-4-2 rating and −0.89 V negative clamp voltage at 10 mA.
What is the thermal requirement for the DAP pad on the CM1248-08DE?
The DAP (die attach pad) on the CM1248-08DE is an exposed thermal pad on the underside of the uDFN-8 package. It must be soldered to a dedicated PCB thermal pad connected to inner-layer ground planes via ≥4 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) to ensure effective heat dissipation during ESD events and maintain long-term reliability of the CM1248-08DE under repeated surge conditions.
Can the CM1248-08DE replace older ESD arrays like the NUP4201MR6T1G in new designs?
The CM1248-08DE is not a direct replacement for the NUP4201MR6T1G due to fundamental differences: the NUP4201MR6T1G is a 4-channel device in SOT-23-6, while the CM1248-08DE provides 8 channels in uDFN-8. However, for new designs targeting higher channel density, smaller footprint, and lower capacitance, the CM1248-08DE offers superior performance-especially in USB 2.0 and MIPI applications where its 10 pF capacitance and ±15 kV rating exceed the NUP4201MR6T1G's specifications.
CM1248-08DE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 8-UFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 8
- 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:
- 8-UDFN (1.7x1.35)
CM1248-08DE FAQ
1.How can I place an order for CM1248-08DE through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1248-08DE 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 CM1248-08DE reliable?
The price and inventory of CM1248-08DE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1248-08DE is usually 5 days.
3.What payment methods are accepted for CM1248-08DE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1248-08DE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1248-08DE?
CM1248-08DE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1248-08DE 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 CM1248-08DE?
For technical support, including CM1248-08DE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1248-08DE requirements.
6.How does Aetrix verify that CM1248-08DE is sourced from the original manufacturer or authorized distributors?
All CM1248-08DE 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 CM1248-08DE meets industry standards.
7.What is the process for return or replacement of CM1248-08DE?
All CM1248-08DE units undergo pre-shipment inspection (PSI). If there is an issue with CM1248-08DE, 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 CM1248-08DE part is unused and in its original packaging.
Return procedure for CM1248-08DE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1248-08DE 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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