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onsemi CM1225-04DE
- Part No.:
- CM1225-04DE
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 10-UFDFN
- Datasheet:
-
CM1225-04DE.pdf
- Description:
- TVS DIODE 10VC 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,196
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Product details
Overview
CM1225-04DE from onsemi is a 4-channel low-capacitance ESD protection array designed for high-speed interface lines, featuring 0.8 pF typical channel input capacitance, ±8 kV IEC 61000−4−2 contact discharge rating, and integrated Zener clamping to eliminate external bypass capacitors. It protects HDMI, USB 2.0, DisplayPort, and SATA signal paths in compact consumer and embedded systems.
For engineers reviewing the CM1225-04DE datasheet, pinout, applications, or equivalent options, key selection criteria include differential signal compatibility (0.02 pF channel-to-channel capacitance matching), ground-referenced dual-diode + Zener architecture, and uUDFN-10 footprint suitability for space-constrained PCB layouts near high-speed connectors.
Technical Context
The CM1225-04DE implements a four-channel, ground-referenced ESD protection topology where each channel consists of two series diodes steering transient current to VN pins, with an embedded Zener diode between the top diode anode and ground. This configuration enables bidirectional clamping without external capacitors while maintaining sub-1 pF loading.
It operates across –40°C to +85°C, supports DC voltages from –0.5 V to +5.5 V per channel, and delivers 10 V positive and –4.5 V negative clamp voltage at 1 A peak pulse current (8/20 µs waveform), with dynamic resistance of 1.3 Ω per channel under ESD stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±8 kV contact discharge per IEC 61000−4−2 Level 4 - ensures robust system-level ESD immunity without additional board-level protection components. |
| Channel Input Capacitance | 0.8 pF typical at 1 MHz - preserves signal integrity on 480 Mbps USB 2.0 and 1.65 Gbps DVI/HDMI links. |
| Capacitance Matching | 0.02 pF typical between I/O channels - maintains common-mode rejection and skew control for differential pairs like HDMI TMDS. |
| Clamp Voltage (VCL) | +10 V / –4.5 V at 1 A, 8/20 µs - limits voltage overshoot below IC I/O absolute maximum ratings during ESD events. |
| Dynamic Resistance (RDYN) | 1.3 Ω per channel - minimizes voltage rise during fast transients, improving protection effectiveness at high di/dt. |
| Operating Temperature | –40°C to +85°C - supports deployment in industrial and consumer environments including set-top boxes and portable displays. |
Pinout & Package
CM1225-04DE is housed in a RoHS-compliant, leadless uUDFN-10 package (2.5 mm × 1.0 mm, 0.5 mm pitch) with exposed thermal pad and bottom-side ground terminals. The package supports reflow soldering and provides low-inductance grounding via dual VN pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5 | CH1–CH4 | ESD-protected I/O channels - connect directly to high-speed data lines (e.g., HDMI D+ / D–, USB DP / DM). |
| 3, 8 | VN | Ground reference terminals - must be connected to low-impedance system ground plane to ensure effective clamping and thermal dissipation. |
| 6, 7, 9, 10 | NC | No-connect terminals - left unconnected; no internal connection or function; not to be tied to any net. |
Key Features
| Feature | Design Value |
|---|---|
| Zener-integrated clamping | Eliminates need for external 100 nF bypass capacitor on power rail - reduces BOM count and PCB area in tight-layout interfaces. |
| 0.02 pF channel capacitance matching | Enables use on differential high-speed buses (e.g., HDMI, DisplayPort) without skew-induced jitter or common-mode imbalance. |
| 0.8 pF typical input capacitance | Minimizes insertion loss and phase distortion up to 1 GHz - verified via S21 measurements at 0 V and 2.5 V DC bias. |
| 1000+ ESD strike endurance | Guarantees long-term reliability after repeated ±8 kV contact discharges - validated per IEC 61000−4−2 test protocol with 1-second intervals. |
Applications
| HDMI Interface Protection | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting HDMI TMDS channels in notebook GPU outputs or TV source ports against user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance, bidirectional ESD clamp placed within 3 mm of HDMI connector to limit voltage excursion during ±8 kV contact discharge. Use Value: Maintains <0.1 dB insertion loss at 1.65 GHz while clamping transients to ≤+10 V/–4.5 V - prevents pixel corruption and hot-plug detection failure. |
Use Scenario: Safeguarding USB 2.0 DP/DM lines in desktop peripherals and docking stations exposed to frequent cable insertion/removal. IC Role / Device Role / Timing Role: Four-channel ESD array routing both differential signals and VBUS/GND lines with matched capacitance for minimal skew. Use Value: 0.02 pF inter-channel capacitance match preserves 480 Mbps eye diagram integrity; Zener eliminates need for separate VBUS decoupling cap. |
| DisplayPort Source Protection | SATA Differential Pair Protection |
Use Scenario: ESD hardening of DisplayPort main link lanes in ultrabook graphics controllers and monitor input circuitry. IC Role / Device Role / Timing Role: Ground-referenced dual-diode + Zener structure per lane, mounted adjacent to DisplayPort receptacle with shortest possible trace length. Use Value: Sub-1 pF loading avoids degrading 2.7 Gbps or 5.4 Gbps signal rise time; 1.3 Ω RDYN ensures fast response to 15 ns ESD pulses. |
Use Scenario: Protecting SATA Gen II (3 Gbps) differential transmitter/receiver pins in HDD controllers and motherboard southbridge interfaces. IC Role / Device Role / Timing Role: Channel-pair protection for TX+/TX– and RX+/RX– with shared VN ground return path to minimize loop inductance. Use Value: 0.8 pF CIN and matched capacitance prevent bit-error-rate degradation; ±8 kV rating exceeds SATA compliance requirements for external ports. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E05U06DQAR | 0.5 pF typical capacitance, 5 V working voltage, 3.6 V standoff - lower capacitance but tighter voltage margin than CM1225-04DE's 5.5 V rating. | Better suited for 3.3 V-only systems with ultra-high-speed SerDes; less tolerant of voltage excursions beyond 3.6 V. | Select when minimizing capacitance is critical and system rail voltage is strictly regulated at 3.3 V. |
| SP3203-04UTG | 1.0 pF typical capacitance, ±12 kV air discharge (IEC 61000−4−2), no integrated Zener - requires external 100 nF capacitor for positive transient suppression. | Higher ESD rating but larger footprint (SOT-23-6 vs. uUDFN-10); lacks Zener integration, increasing component count. | Choose when higher air-discharge immunity is required and board space allows for discrete bypass capacitor placement. |
Compared with TPD4E05U06DQAR and SP3203-04UTG, the CM1225-04DE uniquely balances 0.8 pF loading, ±8 kV contact immunity, and Zener-enabled single-component protection - making it optimal for compact, cost-sensitive HDMI/USB 2.0 designs where layout density and BOM simplicity are prioritized.
Availability
CM1225-04DE is available at Aetrix Electronics and suitable for HDMI interface protection, USB 2.0 peripheral hardening, and DisplayPort source-side ESD mitigation requiring stable component supply and consistent RoHS-compliant uUDFN-10 delivery.
Supply support for CM1225-04DE 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, medical, and consumer electronics.
The CM1225-04DE belongs to onsemi's ESD protection portfolio targeting high-speed digital interfaces; it was engineered specifically to meet the low-capacitance, small-footprint, and system-level ESD compliance needs of HDMI, USB 2.0, and DisplayPort implementations.
FAQ
What is the maximum operating voltage supported by the CM1225-04DE?
The CM1225-04DE supports a DC voltage range of –0.5 V to +5.5 V at any channel input relative to VN ground. This 5.5 V upper limit ensures safe operation with 3.3 V and 5 V logic families, including HDMI DDC lines and USB VBUS-sensing circuits. Exceeding +5.5 V risks permanent damage, as confirmed in Absolute Maximum Ratings Table 2 of the official datasheet.
Does the CM1225-04DE require an external bypass capacitor?
No, the CM1225-04DE does not require an external bypass capacitor due to its integrated Zener diode between the top diode anode and ground. This design absorbs positive ESD transients directly, eliminating the need for a discrete 100 nF capacitor typically used with non-Zener ESD arrays. This feature is explicitly stated in the Product Description and verified in Electrical Operating Characteristics Note 3.
How many ESD strikes can the CM1225-04DE withstand before performance degradation?
The CM1225-04DE is rated for over 1000 ±8 kV contact ESD strikes per IEC 61000−4−2 Level 4, tested continuously at 1-second intervals. Post-test validation confirms all electrical parameters-including leakage current, capacitance, and clamp voltage-remain within specification. This endurance is documented in the Applications section and footnote * of the datasheet.
What is the thermal pad connection requirement for the CM1225-04DE uUDFN-10 package?
The CM1225-04DE uUDFN-10 package includes an exposed copper thermal pad on the bottom surface that must be soldered to a solid copper ground plane for optimal thermal dissipation and low-inductance grounding. The pad is electrically connected to VN (pins 3 and 8); omitting this connection compromises ESD clamping performance and long-term reliability under repeated transients.
Can the CM1225-04DE be used for protecting differential signaling standards like LVDS or M-LVDS?
Yes, the CM1225-04DE is suitable for differential protocols including LVDS and M-LVDS due to its 0.02 pF typical channel-to-channel capacitance matching and sub-1 pF per-channel loading. This matching preserves common-mode rejection and minimizes skew-induced jitter. Its 1.3 Ω dynamic resistance also ensures balanced transient response across paired lines, as validated in application figures for HDMI and DisplayPort.
CM1225-04DE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 10-UFDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 10V (Typ)
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-UDFN (2.5x1)
CM1225-04DE FAQ
1.How can I place an order for CM1225-04DE through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1225-04DE 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 CM1225-04DE reliable?
The price and inventory of CM1225-04DE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1225-04DE is usually 5 days.
3.What payment methods are accepted for CM1225-04DE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1225-04DE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1225-04DE?
CM1225-04DE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1225-04DE 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 CM1225-04DE?
For technical support, including CM1225-04DE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1225-04DE requirements.
6.How does Aetrix verify that CM1225-04DE is sourced from the original manufacturer or authorized distributors?
All CM1225-04DE 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 CM1225-04DE meets industry standards.
7.What is the process for return or replacement of CM1225-04DE?
All CM1225-04DE units undergo pre-shipment inspection (PSI). If there is an issue with CM1225-04DE, 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 CM1225-04DE part is unused and in its original packaging.
Return procedure for CM1225-04DE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1225-04DE 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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