onsemi CM2020-00TR | HDMI Transmitter Port ESD Protection (TSSOP-38)
The onsemi CM2020-00TR is a purpose-built HDMI transmitter (source) port protection device that integrates low-capacitance ESD protection for HDMI TMDS and control lines. Designed to help interfaces meet IEC 61000-4-2 immunity while preserving signal integrity, the CM2020-00TR fits neatly into high-speed consumer and computing designs where HDMI reliability is non-negotiable. Packaged in a compact TSSOP-38 for surface-mount assembly and supplied in Tape & Reel, it streamlines both design-in and volume manufacturing.
Engineers value the CM2020-00TR for its balance of robust ESD performance and low parasitics that support clean HDMI signaling. Sourcing managers appreciate the clear device intent—HDMI source port protection—and a straightforward ordering code that specifies Tape & Reel for automated pick-and-place. Together, these characteristics make the onsemi CM2020-00TR a practical choice for TVs, set-top boxes, AV equipment, PCs, and graphics-driven platforms that need dependable HDMI ports.
Why this device matters
High-speed differential links like HDMI TMDS lines are especially sensitive to added capacitance and leakage from protection components. The onsemi CM2020-00TR targets HDMI source ports specifically, offering low-capacitance protection structures tuned for TMDS as well as the supporting control signals. The result is an ESD solution that helps meet system-level standards without compromising eye diagrams or timing budgets.
What sets the onsemi CM2020-00TR apart
- HDMI-focused protection approach for transmitter/source ports
- Low-capacitance ESD structures intended to preserve high-speed signal integrity
- ±8 kV ESD robustness per IEC 61000-4-2 (as specified)
- Practical manufacturing attributes: TSSOP-38 package, Surface Mount, Tape & Reel
- Backed by onsemi (device lineage from California Micro Devices)
Key specifications and attributes
- Brand / Manufacturer: onsemi
- Series: CM2020
- MPN: CM2020-00TR
- Category: ESD protection / HDMI port protection
- Function: HDMI transmitter/source port ESD protection
- Interface: HDMI
- ESD Protection: Up to ±8 kV (IEC 61000-4-2)
- Package: TSSOP-38
- Mounting Type: Surface Mount (SMT)
- Pin Count: 38
- Packaging: Tape & Reel (TR)
Information not specified in the provided datasheet reference or inputs:
- Line/channel capacitance: Not specified in datasheet
- Number of protected channels or exact pin mapping: Not specified in datasheet
- Operating voltage range or working voltage: Not specified in datasheet
- Clamping voltage/peak current: Not specified in datasheet
- Insertion loss or return loss metrics: Not specified in datasheet
- Operating temperature range: Not specified in datasheet
- RoHS/REACH/halogen-free status: Not specified in datasheet
- Lifecycle status: Not specified in datasheet
If your design requires exact electrical values (capacitance per channel, dynamic resistance, clamping performance at specific surge levels), consult the official datasheet directly.
How the onsemi CM2020-00TR fits into an HDMI source design
An HDMI source (transmitter) port typically includes:
- TMDS differential pairs for high-speed video/audio data streams
- DDC lines for EDID/HDCP negotiation
- CEC for device control in home AV setups
- HPD and other control lines
These lines exit the SoC or GPU through an HDMI transmitter and cross a board-to-connector boundary. The onsemi CM2020-00TR is placed at the source-side port to provide ESD protection at or near the HDMI connector, creating a first line of defense against discharges that occur when the user connects/disconnects cables.
Signal integrity and low capacitance
High-speed serial links demand protection devices with low capacitance and minimal leakage to avoid eye-closure, skew, or jitter. The CM2020-00TR addresses this by using low-capacitance structures tailored for HDMI TMDS and control lines. While the exact capacitance figures are not specified in the provided data, the application intent is clear: protect the lines without compromising high-speed integrity.
ESD robustness in the field
IEC 61000-4-2 defines test levels for electrostatic discharge that systems encounter in real-world scenarios. With protection up to ±8 kV per IEC 61000-4-2, the onsemi CM2020-00TR helps your HDMI source port withstand common ESD events. This can reduce field failures, RMA rates, and hidden costs associated with intermittent port damage, particularly in consumer environments where frequent cable plugging is expected.
Placement strategy
Protection is most effective when placed as close as practical to the HDMI connector. Short, direct traces from the connector pins to the CM2020-00TR and then to the rest of the system help minimize inductance and improve clamping effectiveness. Keep return paths to ground low-impedance and avoid long stubs on high-speed lines. When routing TMDS pairs, maintain differential impedance, pair coupling, and symmetry through and around the protection device footprint.
Design-in and layout guidance
While exact electrical parameters are not provided here, these general best practices apply when integrating the onsemi CM2020-00TR into an HDMI source design:
- Place close to the HDMI connector: Minimize the distance between the connector and the protection device to intercept discharges at the boundary.
- Preserve differential integrity: Keep TMDS pairs tightly coupled with consistent spacing and reference plane continuity across the protection footprint.
- Keep stubs short: Any branch from a high-speed pair to the protection pins should be as short and symmetrical as possible.
- Solid ground reference: Provide low-inductance ground connections and a robust return path to improve clamping behavior during ESD events.
- Controlled impedance: Maintain the target differential impedance for HDMI pairs (board stack-up and routing rules) around the protection device.
- Clean power/ground separation: Although the CM2020-00TR is an ESD solution, good overall return-current management across the HDMI section reduces susceptibility to both ESD and EMI issues.
- Validate with eye diagrams: Post-layout signal integrity analysis and, if possible, bench validation with HDMI compliance tools help confirm the protection device does not degrade performance.
- Observe rework access: Leave reasonable access around the TSSOP-38 footprint for inspection and rework, especially in dense AV designs.
Applications
The onsemi CM2020-00TR suits a broad range of HDMI source/transmitter ports, including:
- HDMI source/transmitter ports
- TVs and set-top boxes
- PC graphics cards and motherboards
- AV receivers, media players, and game consoles
If your design uses an SoC, GPU, or HDMI transmitter IC and must reliably interface to a consumer-grade HDMI connector, an HDMI-focused ESD protection array like the CM2020-00TR is a natural fit.
Sourcing and ordering information
- MPN: onsemi CM2020-00TR
- Description: HDMI transmitter (source) port protection device
- Package: TSSOP-38
- Mounting Type: Surface Mount
- Packaging: Tape & Reel (TR)
- Inventory in provided data: 0 (no stock information beyond this dataset)
The “TR” suffix confirms Tape & Reel packaging for automated assembly lines. For purchasing teams, this simplifies logistics and reduces the chance of receiving non-reel packaging that could slow down production. If you require alternate packaging or minimum order quantity details, consult onsemi’s sales channels or authorized distributors.
Because lifecycle status and environmental compliance are not included in the provided data, verify these attributes on the latest onsemi documentation or distributor portals before finalizing a purchase.
Lifecycle, environmental, and standards compliance
- Lifecycle Status: Not specified in datasheet (verify on manufacturer/distributor portals)
- RoHS/Environmental Compliance: Not specified in datasheet
- ESD Compliance Target: Helps systems meet IEC 61000-4-2 up to ±8 kV
- Manufacturer Note: Device lineage traces to California Micro Devices (acquired by onsemi)
If you are building for regions with strict environmental requirements, obtain the latest RoHS/REACH declarations from onsemi. For long-term programs, also check for any Product Change Notices (PCNs) or end-of-life advisories related to CM2020-series devices.
Engineering considerations when selecting HDMI port protection
- Match protection intent to port role: Choose devices like the onsemi CM2020-00TR specifically designed for HDMI source ports. Receiver-side solutions may differ in topology or line assignments.
- Validate high-speed performance: Even low-capacitance arrays should be validated in your specific stack-up and layout. Small differences in routing can influence eye openings.
- System-level testing: After design-in, verify ESD robustness at the system level to IEC 61000-4-2 using your enclosure, connector, and cable assemblies. The goal is to confirm end-product performance, not just component survivability.
- Thermal and mechanical robustness: While ESD is a primary concern, ensure the PCB and connector mechanics support repeated cable insertions without stressing the protection footprint or traces.
- Revision control: Lock the exact MPN—onsemi CM2020-00TR—and the Tape & Reel packaging into your BOM to prevent substitutions that could alter electrical behavior.
Alternatives and related options
The CM2020-00TR is part of the CM2020 series. If you need a variant (for example, with a different pinout, capacitance profile, or packaging), consult the onsemi CM2020 series documentation and selection guides. Specific alternative part numbers and feature differences are not provided in the current data; rely on the official datasheet and onsemi’s portfolio overview to ensure fit.
Frequently asked questions (FAQs)
Q: What does the CM2020-00TR protect?
A: It provides low-capacitance ESD protection for HDMI transmitter (source) port signals, helping interfaces meet IEC 61000-4-2 ESD requirements without degrading TMDS signal integrity.
Q: Is CM2020-00TR supplied on tape and reel?
A: Yes. The “TR” suffix denotes Tape & Reel packaging for automated assembly.
Q: What package does the onsemi CM2020-00TR use?
A: TSSOP-38, suitable for standard SMT assembly.
Q: What is the mounting style?
A: Surface Mount (SMT).
Q: What ESD level does it target?
A: Up to ±8 kV per IEC 61000-4-2, as specified in the provided data.
Q: Are detailed electrical parameters like capacitance and clamping voltage available?
A: They are not specified in the provided information. Refer to the official onsemi CM2020-00TR datasheet for exact values.
Q: Is the onsemi CM2020-00TR RoHS compliant?
A: RoHS status is not specified in the provided data. Check the manufacturer’s latest compliance documentation.
Resources
- Datasheet: https://www.onsemi.com/pub/Collateral/CM2020-D.PDF
Summary
The onsemi CM2020-00TR is a focused, HDMI transmitter-port ESD protection device that combines low-capacitance behavior with up to ±8 kV IEC 61000-4-2 immunity support. Its TSSOP-38 package, SMT footprint, and Tape & Reel supply make it suitable for high-volume consumer and computing products where HDMI reliability and manufacturing throughput matter. While this overview captures the key intent and attributes, consult the official datasheet to obtain exact electrical parameters and to confirm compliance and lifecycle status for your program. By specifying the onsemi CM2020-00TR early in the design and BOM, engineering and sourcing teams can align on a robust protection strategy that helps keep HDMI ports performing reliably in the field.