Overview
The CM1223-02SR, produced by onsemi, is a member of the CM1223 family of diode arrays designed to provide Electrostatic Discharge (ESD) protection for electronic components or subsystems. These devices are particularly suited for applications requiring minimal capacitive loading and high data and clock rates. The CM1223-02SR is available in a 4-pin SOT143 package and is lead-free and RoHS compliant.
Key Specifications
| Parameter | Rating | Units |
|---|---|---|
| Operating Supply Voltage (VP - VN) | 6.0 | V |
| Operating Temperature Range | -40 to +85 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| DC Voltage at any channel input (VN - 0.5) to (VP + 0.5) | V | V |
| Package Power Rating (SOT143-4 Package) | 225 | mW |
| Operating Supply Current (VP - VN) = 3.3 V | 8.0 | µA |
| Signal Clamp Voltage (Positive Transients) | 6.7 | V |
| Channel Input Capacitance | 0.7 - 1.0 | pF |
| Channel Leakage Current | ±0.1 - ±1.0 | µA |
Key Features
- Two, four, and eight channels of ESD protection with integrated backdrive protection on all lines.
- Provides ESD protection to IEC 61000-4-2 Level 4: ±8 kV contact discharge and ±15 kV air discharge.
- Low channel input capacitance of 1.0 pF (typical) with minimal capacitance change with temperature and voltage.
- Channel I/O to GND capacitance difference of 0.02 pF typical, ideal for differential signals.
- Mutual capacitance between signal pin and adjacent signal pin at 0.11 pF (typical).
- Zener diode protects supply rail and eliminates the need for external bypass capacitors.
- Pin compatible with CM1213-02, -04, and -08.
- Each I/O pin can withstand over 1000 ESD strikes.
- Available in SOT and MSOP packages.
- Lead-free and RoHS compliant.
Applications
- USB 2.0 ports at 480 Mbps in desktop PCs, notebooks, and peripherals.
- IEEE 1394 Firewire ports at 400 Mbps / 800 Mbps.
- DVI and HDMI ports in notebooks, set-top boxes, digital TVs, and LCD displays.
- UDI and display ports.
- Serial ATA ports in desktop PCs and hard disk drives.
- PCI Express ports.
- General-purpose high-speed data line ESD protection.
Q & A
- What is the CM1223-02SR used for?
The CM1223-02SR is used to provide Electrostatic Discharge (ESD) protection for electronic components or subsystems, especially in applications requiring minimal capacitive loading and high data and clock rates.
- What are the key features of the CM1223-02SR?
The key features include low channel input capacitance, integrated backdrive protection, Zener diode protection for the supply rail, and the ability to withstand over 1000 ESD strikes per I/O pin.
- What are the operating temperature and voltage ranges for the CM1223-02SR?
The operating temperature range is -40°C to +85°C, and the operating supply voltage range is up to 6.0 V.
- What types of packages are available for the CM1223 family?
The CM1223 family is available in SOT143, SOT23, and MSOP packages.
- Is the CM1223-02SR RoHS compliant?
- What is the maximum ESD protection level provided by the CM1223-02SR?
The CM1223-02SR provides ESD protection up to ±8 kV contact discharge and ±15 kV air discharge according to IEC 61000-4-2 and MIL-STD-883D standards.
- How does the backdrive protection in the CM1223-02SR work?
The backdrive protection diode blocks backdrive current from flowing from a high potential voltage node to a lower potential voltage node, ensuring no more than 5 µA on any I/O pin when the I/O pin voltage is greater than the CM1223 supply voltage.
- What are some common applications for the CM1223-02SR?
- How should the CM1223-02SR be placed in a PCB layout to maximize ESD protection?
The ESD protection array should be located as close as possible to the point of entry of expected electrostatic discharges to minimize parasitic series inductances.
- What is the typical channel input capacitance of the CM1223-02SR?
The typical channel input capacitance is 1.0 pF.
