onsemi CM2009-00QR

Overview

CM2009-00QR from onsemi is a VGA port companion circuit integrating ESD protection, DDC level shifting, and HSYNC/VSYNC buffering for PC graphics controllers, adapter cards, and set-top boxes. It provides ±8 kV IEC-61000-4-2 contact ESD protection on 7 pins, 4 pF max video line capacitance, and integrated 65 Ω sync-line termination resistors in a 16-pin QSOP package.

For engineers reviewing the CM2009-00QR datasheet, pinout, applications, or equivalent options, this device serves as a single-chip interface solution between low-voltage video controllers and VGA/DVI-I connectors-requiring precise ESD robustness, bi-directional DDC voltage translation, and TTL-to-CMOS sync signal conditioning with on-die impedance matching.

Technical Context

The CM2009-00QR implements three independent functional blocks: (1) seven-channel low-capacitance ESD protection using current-steering diodes on VIDEO_1–3, SYNC_OUT1/2, and DDC_OUT1/2; (2) dual N-channel MOSFETs for bi-directional level shifting between DDC_IN1/2 and DDC_OUT1/2, with gate bias supplied via VCC_DDC; and (3) two non-inverting CMOS drivers for SYNC_IN1/2 to SYNC_OUT1/2, each incorporating a fixed 65 Ω series output resistor (RT).

It supports isolated supply domains: VCC_VIDEO (for video ESD), VCC_SYNC (for sync drivers and ESD), and VCC_DDC (for DDC FET gates), enabling interoperability across mixed-voltage systems. Backdrive protection on DDC lines prevents current flow when the monitor remains powered while the controller is off-enabled by the BYP pin's optional 0.2 µF capacitor that elevates DDC ESD rating from ±4 kV to ±8 kV.

Key Specifications

Pinout & Package

CM2009-00QR is housed in a compact 16-lead QSOP (Case 492), measuring 4.89 mm × 3.90 mm × 1.24 mm, with 0.635 mm pitch and Pb-free RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar VGA port interface applications.

Compared with CM2009-00QR, the CM2009-02QR offers lower SYNC output resistance for tighter impedance control but increases BOM complexity, while TPD12S016RGER extends functionality to HDMI systems at the cost of higher pin count and voltage requirements-making CM2009-00QR optimal for dedicated, cost-sensitive VGA-only interfaces.

Availability

CM2009-00QR is available at Aetrix Electronics and suitable for desktop PCs, graphics cards, and set-top boxes requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for CM2009-00QR 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 focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.

The CM2009-00QR belongs to onsemi's interface protection product line, engineered specifically to simplify VGA/DVI-I port design by consolidating ESD, level shifting, and sync buffering into one compact, high-reliability IC.

FAQ

What is the primary function of the CM2009-00QR in a VGA interface design?

The CM2009-00QR serves as a complete VGA port companion IC, integrating ESD protection for all VGA connector-facing signals (RGB, HSYNC, VSYNC, DDC), bi-directional DDC level shifting between controller and monitor voltage domains, and buffered TTL-to-CMOS conversion with integrated 65 Ω sync-line termination. Its role is to replace multiple discrete protection and interface components in PC, graphics card, and set-top box designs-ensuring robust plug/unplug operation and signal integrity without external resistors or translators. The CM2009-00QR achieves this in a single 16-pin QSOP package with isolated supply rails.

How does the BYP pin affect ESD performance on the DDC lines of the CM2009-00QR?

The BYP pin on the CM2009-00QR accepts an external 0.2 µF ceramic capacitor connected to ground, which increases the ESD withstand voltage on DDC_OUT1 and DDC_OUT2 from ±4 kV to ±8 kV contact discharge per IEC-61000-4-2 Level 4. Without the BYP capacitor, the DDC lines default to ±4 kV rating. This feature enables system designers to meet stringent industrial ESD requirements selectively-only where needed-while minimizing component count elsewhere. The CM2009-00QR datasheet specifies that the capacitor must be low-inductance and placed close to the BYP pin for full effectiveness.

Can the CM2009-00QR be used interchangeably with the CM2009-02QR in the same PCB layout?

No-the CM2009-00QR and CM2009-02QR are not interchangeable on the same PCB without layout modification. Although both share identical pinouts and supply configurations, the CM2009-00QR integrates 65 Ω series resistors on SYNC_OUT1/2, whereas the CM2009-02QR integrates 15 Ω resistors and requires two external resistors to achieve proper 75 Ω video cable termination. Using CM2009-02QR in a layout designed for CM2009-00QR would result in unterminated sync lines and potential signal integrity issues. The CM2009-00QR is optimized for direct 65 Ω matching in standard VGA applications.

What is the maximum video resolution supported by the CM2009-00QR?

While the CM2009-00QR itself does not impose a hard resolution limit, its 4 pF maximum input capacitance on VIDEO_1/2/3 and 12 ns propagation delay on SYNC paths enable reliable operation at resolutions up to 1920×1200@60 Hz (UXGA), consistent with standard VGA timing specifications. Signal integrity depends on board layout, cable quality, and source/sink driver strength-not the CM2009-00QR's internal circuitry. The device preserves analog RGB bandwidth by minimizing capacitive loading and avoids introducing jitter or skew that could degrade timing margins. For higher resolutions like WQXGA, system-level validation is required-but the CM2009-00QR remains fully compatible with the underlying VGA electrical standard.

Does the CM2009-00QR provide power supply sequencing support or brown-out detection?

No-the CM2009-00QR does not include power supply sequencing logic, voltage monitoring, or brown-out detection circuitry. It operates transparently across its specified supply ranges: VCC_VIDEO, VCC_SYNC, and VCC_DDC each accept 0 V to 6.0 V independently. The device relies on external system-level power management; its ESD and level-shifting functions remain active as long as respective supplies are within operating limits. There is no internal reset, enable, or status pin. Designers must ensure proper decoupling (e.g., 0.1 µF ceramic caps adjacent to each VCC pin) and avoid violating absolute maximum ratings during power-up/down transitions. The CM2009-00QR is a passive interface enhancer-not a supervisory IC.