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onsemi CM1224-04MR
- Part No.:
- CM1224-04MR
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
CM1224-04MR.pdf
- Description:
- TVS DIODE 3.3VWM 10VC 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,720
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Product details
Overview
CM1224-04MR from onsemi is a 4-channel low-capacitance ESD protection array designed for high-speed data lines, featuring 0.7 pF typical channel input capacitance, ±8 kV IEC 61000−4−2 contact discharge rating, and integrated VP–VN Zener clamping to protect supply rails without external bypass capacitors. It is used in HDMI, DVI, and USB 2.0 interfaces where minimal signal loading and robust ESD immunity are critical.
For engineers reviewing the CM1224-04MR datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, MSOP-10 package layout, differential-signal-optimized capacitance matching (0.02 pF typical), clamping voltage behavior under 1 A transients, and real-world selection guidance against comparable ESD arrays.
Technical Context
The CM1224-04MR implements a dual-diode steering architecture per channel-routing positive ESD pulses to VP and negative pulses to VN-combined with an embedded Zener diode between VP and VN to clamp supply rail overvoltage and eliminate reliance on external decoupling capacitors. Its design targets systems where parasitic inductance on supply rails would otherwise degrade clamping performance.
It operates across –40°C to +85°C, supports 3.3 V and 5.5 V supply rails, delivers 10 V positive clamping voltage at 1 A transient, and maintains stable 0.7 pF input capacitance across voltage and temperature-enabling reliable use in differential high-speed links like HDMI and Serial ATA without skew or insertion loss degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±8 kV per IEC 61000−4−2 Level 4 contact discharge - ensures compliance with industrial and consumer ESD immunity requirements. |
| Channel Input Capacitance | 0.7 pF typical at 1 MHz - preserves signal integrity on 480 Mbps USB 2.0 and 1.65 Gbps DVI/HDMI channels. |
| Capacitance Matching | 0.02 pF typical - enables precise differential pair protection without skew-induced jitter in high-speed serial links. |
| Clamp Voltage (VCL) | +10 V / −1.8 V at 1 A, 8/20 µs pulse - limits voltage overshoot on protected I/O lines during fast-rising ESD events. |
| Dynamic Resistance | 1.08 Ω (positive) / 0.66 Ω (negative) - minimizes voltage rise across device during ESD current flow, improving protection margin. |
| Supply Voltage Range | 3.3 V to 5.5 V (VP − VN) - compatible with standard logic supply domains including USB PHY and display interface ICs. |
| Leakage Current | ±1.0 µA max at 5 V - avoids DC loading on sensitive analog or reference inputs in mixed-signal systems. |
Pinout & Package
CM1224-04MR is housed in a lead-free 10-lead MSOP package (Case 846AE), measuring 3.0 mm × 3.0 mm × 0.85 mm, optimized for space-constrained PCB layouts near high-speed connectors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CH1 | ESD-protected I/O channel input - connects directly to first high-speed signal line (e.g., HDMI TMDS+). |
| 2 | NC | No connect - must remain unconnected; no internal circuitry or thermal path. |
| 3 | VP | Positive supply rail connection - ties to local 3.3 V or 5 V plane; Zener clamps here during positive ESD events. |
| 4 | CH2 | ESD-protected I/O channel input - second protected line, matched capacitance ensures differential timing integrity. |
| 5 | NC | No connect - floating; no routing or grounding required. |
| 6 | CH3 | ESD-protected I/O channel input - third channel for multi-lane interfaces (e.g., DVI dual-link or SATA TX/RX pairs). |
| 7 | NC | No connect - electrically isolated; PCB keep-out recommended. |
| 8 | VN | Negative supply rail (GND) connection - provides return path for negative ESD transients and stabilizes Zener bias. |
| 9 | CH4 | ESD-protected I/O channel input - fourth channel supporting full HDMI 1.4 TMDS lane count or quad USB 2.0 lanes. |
| 10 | NC | No connect - no internal function; must not be soldered or tied. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VP–VN Zener diode | Eliminates need for external 0.22 µF bypass capacitor while maintaining <10 V clamp on supply rail during ESD strikes. |
| 0.02 pF capacitance matching | Enables use in differential signaling (e.g., HDMI, DVI) without skew-induced eye closure or jitter accumulation. |
| 0.7 pF typical input capacitance | Supports >1 GHz bandwidth operation - validated via S21 insertion loss curves up to 3 GHz with <0.5 dB loss at 1 GHz. |
| 1000+ ESD strike endurance | Ensures long-term reliability in production test environments and field-replaceable ports subject to repeated handling. |
| Lead-free MSOP-10 package | Meets RoHS and JEDEC MSL-1 standards - suitable for reflow assembly without moisture sensitivity concerns. |
Applications
| HDMI/DVI Video Interface Protection | USB 2.0 High-Speed Port Protection |
|---|---|
Use Scenario: Protecting TMDS differential pairs in notebook GPU outputs or set-top box HDMI transmitters from human-body-model ESD events during cable insertion. IC Role / Device Role / Timing Role: ESD transient suppressor placed within 5 mm of HDMI connector, clamping fast-rising ±8 kV discharges before they reach the serializer IC. Use Value: Maintains <0.02 pF inter-channel capacitance mismatch to prevent differential skew >1 ps, preserving HDMI 1.4 eye diagram compliance. | Use Scenario: Safeguarding USB 2.0 D+/D− lines in peripheral hubs or docking stations exposed to frequent hot-plug cycles and bench-level ESD. IC Role / Device Role / Timing Role: Bidirectional ESD shunt located at USB Type-A receptacle, steering transients to VP/VN rails with sub-10 V clamping to preserve PHY receiver thresholds. Use Value: 0.7 pF per channel capacitance avoids degrading 480 Mbps eye height by more than 5%, meeting USB-IF compliance margin. |
| Serial ATA Data Link Protection | PCI Express Gen 1 Lane Protection |
Use Scenario: Shielding SATA TX/RX differential lanes in SSD enclosures or motherboard storage controllers from ESD induced during drive insertion/removal. IC Role / Device Role / Timing Role: Four-channel ESD array assigned to two differential pairs (TX+, TX−, RX+, RX−), leveraging matched capacitance for common-mode rejection. Use Value: 0.02 pF capacitance matching ensures <0.5 ps differential skew across SATA II 3 Gbps transitions, preventing link training failures. | Use Scenario: Adding ESD resilience to PCIe Gen 1 x1 slots in industrial PCs where card insertion generates repeatable contact discharges. IC Role / Device Role / Timing Role: Channel-pair ESD protection on PERST# and CLK lines, using NC pins to isolate unused terminals and avoid stub reflections. Use Value: Low dynamic resistance (0.66–1.08 Ω) limits voltage overshoot to <10 V during 30 A/ns ESD transients, preventing false resets. |
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, 0.5 pF typical capacitance, ±12 kV IEC 61000−4−2, SOT-23-6 package (6-pin) | Lacks integrated VP–VN Zener; requires external 0.1 µF bypass capacitor for supply rail protection | Select when lower capacitance is prioritized over supply rail self-protection and board space allows discrete capacitor placement. |
| SP3204-04UTG | 4-channel, 0.8 pF typical capacitance, ±8 kV IEC 61000−4−2, SLP1616P6 package (1.6 mm × 1.6 mm) | Higher leakage (±5 µA), no Zener between VP/VN, smaller footprint but higher thermal resistance | Choose for ultra-compact layouts where 0.7 mm² area savings outweigh reduced ESD endurance and missing rail clamping. |
Compared with TPD4E001DRYR and SP3204-04UTG, CM1224-04MR uniquely combines Zener-based supply rail clamping, 0.02 pF capacitance matching, and MSOP-10 thermal performance-making it optimal for HDMI/DVI designs requiring simultaneous signal fidelity and system-level ESD robustness without added BOM components.
Availability
CM1224-04MR is available at Aetrix Electronics and suitable for HDMI video interfaces, USB 2.0 peripheral ports, and Serial ATA storage links requiring stable component supply across industrial, consumer, and embedded design cycles.
Supply support for CM1224-04MR 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 connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
The CM1224 family belongs to onsemi's precision ESD protection product line, engineered specifically for high-speed digital interfaces where sub-1 pF capacitance, rail-to-rail clamping, and differential-signal integrity are non-negotiable design requirements.
FAQ
What is the maximum operating temperature range for CM1224-04MR?
The CM1224-04MR is rated for continuous operation from –40°C to +85°C, matching industrial-grade ambient requirements. This range is validated per Table 2 (Absolute Maximum Ratings) and Table 3 (Standard Operating Conditions) in the official onsemi datasheet CM1224/D Rev. 7. Thermal derating is not required within this span, and the MSOP-10 package's 400 mW power rating remains fully applicable across the full temperature window. CM1224-04MR maintains specified clamping voltage and leakage performance throughout this range.
Does CM1224-04MR require an external bypass capacitor on the VP pin?
No, CM1224-04MR does not require an external bypass capacitor on the VP pin due to its integrated Zener diode between VP and VN. This Zener clamps supply rail overvoltage during positive ESD events and eliminates the need for a discrete 0.22 µF ceramic capacitor-reducing BOM count and PCB area. However, for lowest possible VCL when VP is biased significantly below the Zener breakdown voltage, onsemi recommends adding a 0.22 µF capacitor as an optional enhancement. CM1224-04MR's datasheet explicitly states this capability in the Application Information section.
How many ESD strikes can CM1224-04MR withstand before performance degradation?
Each I/O pin of CM1224-04MR is rated to withstand over 1000 ESD strikes at ±8 kV (IEC 61000−4−2 contact discharge), as confirmed in the Features section of the onsemi datasheet. This endurance is measured under standardized test conditions and reflects functional retention-not just survival-meaning clamping voltage, leakage, and capacitance remain within specification after repeated stress. CM1224-04MR's robustness supports high-volume manufacturing test environments and field-replaceable port applications where repeated handling is expected.
What is the significance of the "0.02 pF typical capacitance matching" spec for CM1224-04MR?
The 0.02 pF typical capacitance matching between channels in CM1224-04MR ensures minimal inter-channel skew in differential signaling applications such as HDMI and DVI. This tight matching prevents unequal delay between complementary signals, which would otherwise cause eye diagram closure, jitter accumulation, or bit-error-rate increase at multi-Gbps data rates. Verified at 1 MHz with 3.3 V bias, this parameter directly enables CM1224-04MR to protect differential pairs without compromising timing integrity-unlike broader-tolerance arrays. CM1224-04MR's matching spec is a key differentiator for high-fidelity video and storage interfaces.
Can CM1224-04MR be used in 5 V systems?
Yes, CM1224-04MR supports 5 V systems: its operating supply voltage range (VP − VN) is 3.3 V to 5.5 V per Table 4 of the datasheet, and its ±8 kV ESD rating applies across that full range. The Zener diode's breakdown voltage is designed to clamp safely above 5 V, and clamping voltage remains +10 V / −1.8 V at 1 A even at 5.5 V VP. All electrical characteristics-including leakage, capacitance, and dynamic resistance-are guaranteed at 5 V operation. CM1224-04MR is routinely deployed in 5 V HDMI source devices and USB host controllers.
CM1224-04MR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 10V (Typ)
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- HDMI
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
CM1224-04MR FAQ
1.How can I place an order for CM1224-04MR through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1224-04MR 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 CM1224-04MR reliable?
The price and inventory of CM1224-04MR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1224-04MR is usually 5 days.
3.What payment methods are accepted for CM1224-04MR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1224-04MR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1224-04MR?
CM1224-04MR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1224-04MR 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 CM1224-04MR?
For technical support, including CM1224-04MR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1224-04MR requirements.
6.How does Aetrix verify that CM1224-04MR is sourced from the original manufacturer or authorized distributors?
All CM1224-04MR 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 CM1224-04MR meets industry standards.
7.What is the process for return or replacement of CM1224-04MR?
All CM1224-04MR units undergo pre-shipment inspection (PSI). If there is an issue with CM1224-04MR, 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 CM1224-04MR part is unused and in its original packaging.
Return procedure for CM1224-04MR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1224-04MR 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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