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onsemi CM1223-04MR
- Part No.:
- CM1223-04MR
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
CM1223-04MR.pdf
- Description:
- TRANS VOLTAGE SUPPRESSOR DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:16,000
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Product details
Overview
CM1223-04MR from onsemi is a 4-channel ESD protection diode array with integrated backdrive protection, designed for high-speed data lines including USB 2.0, HDMI, and DVI interfaces. It delivers ±8 kV IEC 61000−4−2 contact ESD protection, 1.0 pF typical channel input capacitance, and operates across −40°C to +85°C with VP–VN supply up to 5.5 V.
For engineers reviewing the CM1223-04MR datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low capacitance matching (0.02 pF typical), mutual capacitance of 0.11 pF between adjacent signal pins, clamp voltage of +8.8 V / −1.4 V at 1 A, and MSOP-10 package compatibility with high-density PCB layouts.
Technical Context
The CM1223-04MR implements a dual-diode steering architecture per channel-directing positive ESD transients to VP and negative transients to VN-combined with an embedded Zener diode between VP and VN to absorb supply-rail ESD strikes. This eliminates need for external bypass capacitors while maintaining rail integrity.
Each I/O pin integrates a dedicated backdrive protection diode that limits reverse current to ≤5 µA when pin voltage exceeds VP, preventing unintended charging of downstream power rails in hot-plug scenarios such as HDMI-connected DVD players and TVs. The device achieves sub-1 ns response time and dynamic resistance of 0.7 Ω (positive) / 0.4 Ω (negative) under 1 A, 8/20 µs pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Protection Level | ±8 kV contact discharge (IEC 61000−4−2 Level 4); enables robust system-level ESD compliance without additional TVS stages |
| Channel Input Capacitance | 1.0 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 difference between I/O-to-GND paths; critical for differential pair symmetry in high-speed serial interfaces |
| Mutual Capacitance | 0.11 pF typical between adjacent signal pins; minimizes crosstalk in tightly spaced routing |
| Clamp Voltage | +8.8 V / −1.4 V at 1 A, 8/20 µs; ensures protected ICs remain within safe operating voltage windows during ESD events |
| Supply Voltage Range | VP–VN = 3.3 V to 5.5 V; supports both 3.3 V and 5 V logic domains without level-shifting circuitry |
| Backdrive Current Limit | ≤5 µA max per I/O pin when VIN > VP; prevents false POR triggering in powered-off peripherals connected via HDMI/USB |
Pinout & Package
CM1223-04MR is housed in a lead-free MSOP-10 (Case 846AE) package measuring 3.0 mm × 3.0 mm × 0.85 mm, optimized for space-constrained high-speed interface routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CH1 | ESD-protected bidirectional I/O line; connects directly to protected signal trace (e.g., USB D+) |
| 2 | NC | No connect; must be left floating-no internal connection or thermal function |
| 3 | VP | Positive supply rail input; ties to local 3.3 V or 5 V domain; supplies clamping path for positive ESD |
| 4 | CH2 | ESD-protected bidirectional I/O line; used for second signal in differential pair (e.g., USB D−) |
| 5 | NC | No connect; must be left floating-no internal connection or thermal function |
| 6 | CH3 | ESD-protected bidirectional I/O line; supports third high-speed line (e.g., HDMI TMDS Clock) |
| 7 | NC | No connect; must be left floating-no internal connection or thermal function |
| 8 | VN | Negative supply rail (GND); provides return path for negative ESD transients and backdrive blocking |
| 9 | CH4 | ESD-protected bidirectional I/O line; completes 4-channel set (e.g., HDMI TMDS Data2) |
| 10 | NC | No connect; must be left floating-no internal connection or thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Integrated backdrive diode per I/O | Blocks reverse current flow into powered-off subsystems-prevents bulk capacitor charging and POR failure in HDMI/USB hot-plug use cases |
| Zener-based VP–VN rail protection | Eliminates need for external 0.1 µF ceramic bypass capacitor on VP, reducing BOM count and PCB area |
| 0.02 pF I/O-to-GND capacitance matching | Enables precise differential impedance control in USB 2.0 and DisplayPort applications where skew impacts eye diagram integrity |
| 0.11 pF mutual capacitance | Reduces inter-pair crosstalk in multi-lane interfaces like HDMI and Serial ATA, preserving jitter margin |
| 1000+ ESD strike endurance per pin | Ensures long-term reliability in production test environments and field-replaceable cable insertion cycles |
Applications
| USB 2.0 Interface Protection | HDMI TMDS Line Protection |
|---|---|
|
Use Scenario: Protecting D+/D− differential pairs on notebook USB 2.0 host ports exposed to frequent cable insertion/removal. IC Role / Device Role / Timing Role: ESD transient suppressor placed at connector entry point; clamps ±8 kV discharges before reaching USB transceiver PHY. Use Value: 1.0 pF channel capacitance avoids signal degradation at 480 Mbps; 0.02 pF matching maintains <10 ps skew between D+ and D−. |
Use Scenario: Shielding TMDS clock and data lanes on HDMI source outputs in digital TVs and set-top boxes. IC Role / Device Role / Timing Role: Per-lane ESD guard for all four TMDS channels (CLK, DATA0, DATA1, DATA2), referenced to local 3.3 V and GND. Use Value: 0.11 pF mutual capacitance prevents crosstalk-induced jitter; ±8 kV rating meets IEC 61000−4−2 system-level compliance. |
| DVI-D Dual-Link Protection | Serial ATA Gen II Port Protection |
|
Use Scenario: Securing 24-pin DVI-D connector signals in LCD monitors and graphics cards handling dual-link pixel clocks up to 330 MHz. IC Role / Device Role / Timing Role: Four CM1223-04MR devices deployed across TMDS channels and hot-plug detect (HPD) line to prevent latch-up during cable mating. Use Value: Backdrive protection blocks reverse current from active monitor into inactive GPU, avoiding false HPD assertion and display initialization failure. |
Use Scenario: ESD hardening of SATA TX/RX differential pairs and activity LED control lines on motherboard SATA controllers. IC Role / Device Role / Timing Role: Signal-line protector with VP tied to 3.3 V SATA power domain and VN to chassis ground; handles both data and sideband signals. Use Value: Sub-1 ns response time captures fast-rising ESD pulses before SATA PHY enters latch-up; 1.0 pF loading preserves 3 Gbps eye opening. |
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, 0.8 pF typical capacitance, SOT-5X3 package; lacks integrated backdrive diode and VP–VN Zener | Requires external 0.1 µF VP bypass capacitor; not suitable for systems where backdrive current must be blocked without added components | Select when only 2 lines need protection and board space allows discrete bypass cap; avoid for HDMI/USB hot-plug-critical designs |
| SP3203-04UTG | 4-channel, 0.6 pF typical capacitance, SOT-23-6 package; rated for ±12 kV HBM but only ±6 kV IEC contact discharge | Lower ESD immunity margin for system-level IEC testing; no VP–VN Zener-requires separate rail protection strategy | Prefer for cost-sensitive, lower-risk industrial interfaces; not recommended for consumer HDMI/USB where ±8 kV IEC compliance is mandatory |
Compared with TPD2E001DRYR and SP3203-04UTG, CM1223-04MR uniquely combines 4-channel protection, ±8 kV IEC rating, integrated backdrive blocking, and VP–VN Zener rail protection in a single MSOP-10 package-enabling compact, component-count-optimized designs for premium consumer video and data interfaces.
Availability
CM1223-04MR is available at Aetrix Electronics and suitable for USB 2.0, HDMI, and DVI interface designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for CM1223-04MR 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, high-performance silicon solutions for automotive, industrial, cloud, medical, and edge applications.
The CM1223 family was developed specifically for high-speed serial interface ESD protection-prioritizing ultra-low capacitance, rail-integrated clamping, and backdrive immunity to enable reliable hot-plug operation in consumer electronics.
FAQ
What is the maximum operating voltage range for CM1223-04MR?
The CM1223-04MR supports an operating supply voltage range of VP–VN = 3.3 V to 5.5 V, with absolute maximum rating of 6.0 V. This allows direct integration into both 3.3 V and 5 V logic domains without level shifters. The device remains functional across −40°C to +85°C ambient temperature, and its low leakage (±0.1 µA typical) ensures minimal impact on signal integrity in battery-powered or low-power USB/HDMI applications. CM1223-04MR must not be operated outside these validated ranges to maintain specified ESD performance and reliability.
Does CM1223-04MR require external bypass capacitors on the VP rail?
No, CM1223-04MR does not require external bypass capacitors on the VP rail due to its integrated Zener diode between VP and VN, which absorbs positive ESD transients and stabilizes the supply rail during surge events. This design eliminates the need for a discrete 0.1 µF ceramic capacitor typically required by competing ESD arrays. The absence of external components reduces PCB footprint, BOM count, and potential layout-induced parasitics-making CM1223-04MR especially advantageous in space-constrained HDMI and USB 2.0 port implementations where VP routing is short and localized.
How does the backdrive protection in CM1223-04MR function in practice?
CM1223-04MR incorporates a dedicated backdrive diode between each I/O pin and the VP rail, limiting reverse current to ≤5 µA when the I/O pin voltage exceeds VP. In real-world use-such as an HDMI-connected DVD player powered off while the TV remains on-this prevents backdrive current from charging the DVD's bulk supply capacitance to levels that could disrupt power-on-reset (POR) behavior. The feature ensures clean system restarts after hot-plug events and is verified under conditions where VIN > VP, making CM1223-04MR suitable for consumer video interfaces where interoperability and reliability are non-negotiable.
Can CM1223-04MR be used for differential signal pairs like USB D+ and D−?
Yes, CM1223-04MR is explicitly designed for differential high-speed interfaces. Its 0.02 pF typical capacitance matching between I/O-to-GND paths ensures minimal skew (<10 ps) between complementary signals, preserving differential impedance and eye diagram integrity on USB 2.0 (480 Mbps) and HDMI TMDS lanes. The 0.11 pF mutual capacitance between adjacent pins further reduces crosstalk. When applied to USB D+/D−, pins 1 and 4 serve as the matched pair, with VP (pin 3) and VN (pin 8) shared across all channels-enabling compact, symmetric placement directly at the USB connector for optimal ESD suppression.
What is the thermal performance of CM1223-04MR in the MSOP-10 package?
The MSOP-10 package of CM1223-04MR has a rated package power dissipation of 400 mW under standard operating conditions, significantly higher than the 225 mW rating of SOT-23 variants. This enables robust thermal handling during repeated ESD events and sustained operation in thermally dense layouts near connectors or high-speed PHYs. The 3.0 mm × 3.0 mm footprint provides adequate copper pour area for heat spreading, and the device's low dynamic resistance (0.7 Ω positive / 0.4 Ω negative) minimizes joule heating during clamping. Thermal derating is not required below +85°C ambient, and the package's Pb-free finish complies with IPC/JEDEC J-STD-020 moisture sensitivity level 1.
CM1223-04MR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
CM1223-04MR FAQ
1.How can I place an order for CM1223-04MR through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1223-04MR 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 CM1223-04MR reliable?
The price and inventory of CM1223-04MR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1223-04MR is usually 5 days.
3.What payment methods are accepted for CM1223-04MR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1223-04MR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1223-04MR?
CM1223-04MR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1223-04MR 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 CM1223-04MR?
For technical support, including CM1223-04MR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1223-04MR requirements.
6.How does Aetrix verify that CM1223-04MR is sourced from the original manufacturer or authorized distributors?
All CM1223-04MR 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 CM1223-04MR meets industry standards.
7.What is the process for return or replacement of CM1223-04MR?
All CM1223-04MR units undergo pre-shipment inspection (PSI). If there is an issue with CM1223-04MR, 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 CM1223-04MR part is unused and in its original packaging.
Return procedure for CM1223-04MR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1223-04MR 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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