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onsemi CM1223-08MR
- Part No.:
- CM1223-08MR
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
CM1223-08MR.pdf
- Description:
- ESD PROTECTION ARRAYS, LOW CAPAC
- Quantity:
- Payment:
- Shipping:
Inventory:8,531
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Product details
Overview
CM1223-08MR from onsemi is an 8-channel ESD protection diode array with integrated backdrive protection, designed for high-speed data lines requiring ultra-low capacitive loading (1.0 pF typical per channel), ±8 kV IEC 61000−4−2 contact ESD immunity, and supply rail clamping via embedded Zener. It operates from 3.3 V to 5.5 V and is used in HDMI, USB 2.0, and SATA interfaces where signal integrity and robust transient suppression are critical.
For engineers reviewing the CM1223-08MR datasheet, pinout, applications, or equivalent options, key selection criteria include channel count (8), input capacitance (1.0 pF typ), clamp voltage (+8.8 V / −1.4 V at 1 A), backdrive current blocking (<5 µA leakage), and MSOP-10 package compatibility with high-density PCB layouts.
Technical Context
The CM1223-08MR implements a dual-diode steering architecture per channel-steering positive transients to VP and negative transients to VN-combined with an integrated Zener between VP and VN to absorb supply-rail ESD strikes. Its backdrive protection diode prevents reverse current flow from powered downstream devices into unpowered upstream rails.
It delivers matched channel capacitance (0.02 pF typical difference) and low mutual coupling (0.11 pF typical between adjacent pins), enabling use on differential high-speed buses like HDMI and USB 2.0 without skew or crosstalk degradation. The device supports operation across −40 °C to +85 °C with no external bypass capacitors required due to internal Zener stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Protection Level | ±8 kV contact discharge per IEC 61000−4−2 Level 4 - ensures compliance with industrial and consumer ESD immunity requirements |
| Channel Input Capacitance | 1.0 pF typical at 1 MHz - preserves signal integrity up to 480 Mbps (USB 2.0) and 1.65 Gbps (HDMI 1.3) |
| Clamp Voltage (Positive) | +8.8 V at 1 A, 8/20 µs pulse - limits voltage overshoot during ESD events to protect downstream 3.3 V/5 V logic |
| Clamp Voltage (Negative) | −1.4 V at 1 A, 8/20 µs pulse - prevents negative rail collapse and latch-up in CMOS receivers |
| Supply Voltage Range (VP–VN) | 3.3 V to 5.5 V - compatible with standard logic I/O domains including USB, HDMI, and SATA |
| Leakage Current | ±0.1 µA typical at 5 V - negligible DC loading on high-impedance signal paths |
| Dynamic Resistance | 0.7 Ω (positive), 0.4 Ω (negative) - enables fast energy dissipation and low-voltage clamping under surge conditions |
Pinout & Package
CM1223-08MR is housed in a lead-free MSOP-10 package (3.0 mm × 3.0 mm × 0.85 mm), optimized for space-constrained high-speed interface routing. Pin assignment follows the 8-channel configuration with dedicated VP and VN supply rails and no NC pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CH1 | I/O channel 1 - bidirectional ESD protection path for first high-speed signal line |
| 2 | CH2 | I/O channel 2 - independent protection node with matched capacitance to CH1 |
| 3 | CH3 | I/O channel 3 - supports differential pair routing with <0.02 pF inter-channel capacitance mismatch |
| 4 | CH4 | I/O channel 4 - enables full-lane protection for 4-lane interfaces such as mini-SATA or DVI |
| 5 | VN | Negative supply rail - common ground reference for all negative ESD current steering paths |
| 6 | CH5 | I/O channel 5 - extends protection to second differential pair or auxiliary control line |
| 7 | CH6 | I/O channel 6 - maintains <0.11 pF mutual capacitance to adjacent pins for minimal crosstalk |
| 8 | VP | Positive supply rail - clamped by internal Zener; eliminates need for external bulk capacitor |
| 9 | CH7 | I/O channel 7 - supports 7-wire configurations (e.g., HDMI TMDS+CEC+HEAC) |
| 10 | CH8 | I/O channel 8 - completes full 8-channel coverage for PCIe x4, DisplayPort, or multi-lane USB-C applications |
Key Features
| Feature | Design Value |
|---|---|
| Integrated backdrive protection | Blocks reverse current flow from powered downstream devices (e.g., TV to off-state DVD player), limiting I/O pin current to <5 µA when VIN > VP |
| Ultra-low and matched input capacitance | 1.0 pF typical per channel with 0.02 pF max mismatch - preserves eye diagram integrity on 480 Mbps USB 2.0 and 1.65 Gbps HDMI links |
| Zener-supplied rail clamping | Embedded Zener between VP and VN absorbs positive ESD strikes on supply rail - removes requirement for external 10 µF bypass capacitor |
| Differential-signal optimization | 0.11 pF typical mutual capacitance between adjacent signal pins - minimizes skew and jitter in differential pairs (e.g., HDMI TMDS) |
| High ESD endurance | Withstands >1000 IEC 61000−4−2 ±8 kV contact discharges per channel - supports long-term field reliability in frequently connected peripherals |
Applications
| HDMI Interface Protection | USB 2.0 High-Speed Port |
|---|---|
Use Scenario: Protecting HDMI TMDS channels and CEC/HEAC lines on notebook GPU outputs or set-top box video outputs against hot-plug ESD and cable-induced transients. IC Role / Device Role / Timing Role: ESD transient suppressor placed at connector entry point; provides sub-1 ns response and clamps to <±9 V while adding <1.0 pF load per lane. Use Value: Prevents pixel corruption, link dropouts, and receiver IC damage during repeated HDMI cable insertion/extraction in consumer AV systems. |
Use Scenario: Securing USB 2.0 D+/D− differential pair and VBUS/GND lines on peripheral hubs, docking stations, and embedded host controllers. IC Role / Device Role / Timing Role: 8-channel array protects all four USB 2.0 lanes (D+, D−, VBUS, GND) plus auxiliary signals (ID, VCONN, CC1/CC2) in single MSOP-10 footprint. Use Value: Maintains 480 Mbps signaling margin by limiting total added capacitance to <1.0 pF per line and ensuring <1.4 V negative clamp during ESD events. |
| SATA III Data Line Protection | PCIe Gen2 x4 Interface |
Use Scenario: Shielding SATA III TX/RX differential pairs and ground-return paths in SSD enclosures, laptop storage bays, and RAID controller add-in cards. IC Role / Device Role / Timing Role: Dual-channel protection per differential pair (CH1/CH2 for TX, CH3/CH4 for RX), with VN/VP rails tied to system ground and 3.3 V supply. Use Value: Enables clean 6 Gbps eye diagrams by holding inter-pair capacitance mismatch ≤0.02 pF and mutual coupling ≤0.11 pF - critical for SATA compliance testing. |
Use Scenario: Guarding PCIe Gen2 x4 lanes (four TX/RX pairs) on graphics cards, NVMe adapters, and server motherboard expansion slots against board-level ESD. IC Role / Device Role / Timing Role: All eight channels deployed across four differential lanes (CH1–CH8), with VP/VN decoupled locally using on-package Zener regulation. Use Value: Eliminates need for discrete 0402 capacitors on each lane while sustaining <1.0 pF loading - reduces BOM count and improves layout density for PCIe 5.0-ready designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CM1213-08MR | Lacks integrated backdrive protection diode; no Zener between VP and VN; higher leakage (±1.0 µA) | Not suitable for systems with mixed-power-state interconnects (e.g., HDMI sink powering source); requires external bypass capacitor | Select CM1223-08MR when backdrive blocking and rail clamping are mandatory - e.g., in portable displays or removable storage docks |
| TPD2E001DRYR | 2-channel only; 1.2 pF typical capacitance; no VP/VN rail clamping; uses separate GND/VCC pins instead of VN/VP | Requires four devices for 8-channel coverage; increases PCB area and parasitic inductance; unsuitable for supply-rail ESD absorption | Choose CM1223-08MR for single-package 8-channel integration, lower capacitance, and self-contained rail protection - critical for space- and performance-constrained designs |
Compared with CM1213-08MR and TPD2E001DRYR, CM1223-08MR uniquely combines 8-channel protection, sub-1 pF loading, integrated backdrive blocking, and Zener-based VP–VN clamping in one MSOP-10 package - delivering superior signal fidelity and system-level ESD robustness without layout or BOM trade-offs.
Availability
CM1223-08MR is available at Aetrix Electronics and suitable for HDMI port hardening, USB 2.0 peripheral protection, and SATA III interface safeguarding requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for CM1223-08MR 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 specializing in energy-efficient power management, analog, sensor, and ESD protection solutions for automotive, industrial, and consumer markets.
The CM1223 family was developed specifically for high-speed digital interface protection, targeting applications where minimal capacitive loading, rail clamping, and backdrive current blocking are essential - such as HDMI, USB, and PCIe interconnects.
FAQ
What is the maximum operating voltage range for CM1223-08MR?
The CM1223-08MR supports an operating supply voltage range of 3.3 V to 5.5 V between VP and VN pins. This range aligns with standard I/O domains used in USB 2.0, HDMI, and SATA interfaces. Exceeding 6.0 V (absolute maximum rating) risks permanent damage. The device functions reliably across −40 °C to +85 °C ambient temperatures, making it suitable for both consumer and industrial environments where CM1223-08MR is deployed.
Does CM1223-08MR require external bypass capacitors on VP or VN?
No, CM1223-08MR does not require external bypass capacitors. Its integrated Zener diode between VP and VN provides internal clamping and stabilizes the supply rail during ESD events. This design eliminates the need for discrete 10 µF ceramic capacitors typically used with unprotected arrays, reducing BOM count and PCB footprint. The absence of external caps also avoids resonance-related signal integrity issues - a key advantage confirmed in CM1223-08MR's application notes and performance curves.
How does the backdrive protection in CM1223-08MR function?
CM1223-08MR incorporates a dedicated backdrive protection diode between VP and VN that blocks reverse current flow from a powered downstream device (e.g., active HDMI display) into an unpowered upstream source (e.g., off-state laptop). When an I/O pin voltage exceeds VP, the diode remains reverse-biased, limiting leakage to <5 µA. This prevents unintended charging of upstream bulk capacitance and ensures proper power-on-reset behavior - a verified capability documented in CM1223-08MR's backdrive protection section and test methodology.
Can CM1223-08MR be used on differential signal pairs like HDMI TMDS?
Yes, CM1223-08MR is explicitly optimized for differential high-speed interfaces. Its 0.02 pF typical channel-to-channel capacitance mismatch and 0.11 pF mutual capacitance between adjacent pins minimize skew and crosstalk. Each TMDS lane (clock, data0–2) can be protected using two dedicated channels (e.g., CH1/CH2 for D0+ and D0−), preserving differential impedance and eye opening - validated in CM1223-08MR's insertion loss plots and application examples for HDMI 1.3+ compliance.
What is the ESD endurance rating of CM1223-08MR per channel?
CM1223-08MR is rated to withstand over 1000 IEC 61000−4−2 ±8 kV contact discharge events per channel without performance degradation. This endurance level is verified through accelerated life testing per onsemi's qualification standards and reflects real-world durability in frequently connected peripherals like USB cables, HDMI dongles, and SATA drives. The robustness directly contributes to field-reliability targets for products incorporating CM1223-08MR in their interface protection strategy.
CM1223-08MR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 8
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 8.8V (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-MSOP
CM1223-08MR FAQ
1.How can I place an order for CM1223-08MR through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1223-08MR 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 CM1223-08MR reliable?
The price and inventory of CM1223-08MR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1223-08MR is usually 5 days.
3.What payment methods are accepted for CM1223-08MR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1223-08MR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1223-08MR?
CM1223-08MR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1223-08MR 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 CM1223-08MR?
For technical support, including CM1223-08MR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1223-08MR requirements.
6.How does Aetrix verify that CM1223-08MR is sourced from the original manufacturer or authorized distributors?
All CM1223-08MR 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 CM1223-08MR meets industry standards.
7.What is the process for return or replacement of CM1223-08MR?
All CM1223-08MR units undergo pre-shipment inspection (PSI). If there is an issue with CM1223-08MR, 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 CM1223-08MR part is unused and in its original packaging.
Return procedure for CM1223-08MR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1223-08MR 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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