Overview
The CM1293A-02SR, produced by onsemi, is a 2-channel low capacitance ESD (Electrostatic Discharge) protection array. This device is designed to provide ESD protection for electronic components or subsystems that require minimal capacitive loading. It is particularly well-suited for protecting systems with high data and clock rates or circuits that demand low capacitive loading. The CM1293A-02SR protects against ESD pulses up to ±8 kV contact discharge per the IEC 61000-4-2 Level 4 standard, making it ideal for high-speed ports such as USB 2.0, IEEE 1394 (FireWire, i.LINK), Serial ATA, DVI, and HDMI.
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 |
| Package Power Rating (SOT143-4 Package) | 225 | mW |
| Channel Input Capacitance | 2.0 pF (Max) | pF |
| Channel I/O to I/O Capacitance | 1.5 pF (Typ) | pF |
| Diode Forward Voltage (Top Diode, Bottom Diode) | 0.60 to 0.95 V | V |
| Channel Leakage Current | ±0.1 to ±1.0 µA | µA |
Key Features
- Provides ESD protection up to ±8 kV contact discharge per IEC 61000-4-2 Level 4 standard.
- Low loading capacitance of 2.0 pF max.
- Low clamping voltage.
- Channel I/O to I/O capacitance of 1.5 pF typical.
- Integrated Zener diode between VP and VN to protect the supply rail and eliminate the need for external bypass capacitors.
- Each I/O pin can withstand over 1000 ESD strikes.
- Available in RoHS-compliant, lead-free SOT143-4 package.
Applications
- DVI and HDMI ports in notebooks, set-top boxes, digital TVs, and LCD displays.
- Serial ATA ports in desktop PCs and hard disk drives.
- PCI Express ports.
- General-purpose high-speed data line ESD protection.
- Removable storage, digital camcorders, and DVD-RW drives.
Q & A
- What is the maximum ESD protection voltage of the CM1293A-02SR?
The CM1293A-02SR protects against ESD pulses up to ±8 kV contact discharge per the IEC 61000-4-2 Level 4 standard.
- What is the typical channel input capacitance of the CM1293A-02SR?
The typical channel input capacitance is 2.0 pF max.
- What is the operating temperature range of the CM1293A-02SR?
The operating temperature range is –40 to +85°C.
- What type of package is the CM1293A-02SR available in?
The CM1293A-02SR is available in a RoHS-compliant, lead-free SOT143-4 package.
- How many ESD channels does the CM1293A-02SR have?
The CM1293A-02SR has 2 ESD channels.
- What is the purpose of the integrated Zener diode in the CM1293A-02SR?
The integrated Zener diode helps protect the supply rail against ESD strikes and eliminates the need for external bypass capacitors.
- Can the CM1293A-02SR withstand multiple ESD strikes?
Yes, each I/O pin can withstand over 1000 ESD strikes.
- What are some common applications for the CM1293A-02SR?
Common applications include DVI and HDMI ports, Serial ATA ports, PCI Express ports, and general-purpose high-speed data line ESD protection.
- How should the CM1293A-02SR be placed on a PCB to maximize ESD protection?
The ESD Protection Array should be located as close as possible to the point of entry of expected electrostatic discharges, with minimal PCB trace lengths to the power supply, ground planes, and between the signal input and the protection device.
- What is the recommended bypass capacitor configuration for the CM1293A-02SR?
A 0.22 µF ceramic chip capacitor should be connected between VP and the ground plane to minimize the effect of supply rail inductance.
