Overview
The CM1231-02SO is a 2-channel low-capacitance ESD (Electrostatic Discharge) protection array designed by onsemi. It is part of the XtremeESD product family and is specifically tailored for protecting next-generation deep submicron ASICs (Application-Specific Integrated Circuits). This device is ideal for systems with high data and clock rates and for circuits that require low capacitive loading, such as USB 2.0 interfaces. The CM1231-02SO features the PicoGuard XP dual-stage ESD architecture, which provides significantly higher system-level ESD protection compared to traditional single-clamp designs.
Key Specifications
| Parameter | Rating/Value | Units |
|---|---|---|
| Number of Channels | 2 | - |
| Operating Supply Voltage (VP) | 6.0 | V |
| Diode Forward DC Current (AOUT/BOUT Side) | 8.0 | mA |
| Continuous Current through Signal Pins (IN to OUT) | 125 | mA |
| Operating Temperature Range | -40 to +85 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| Package Power Rating (SOT23-6) | 225 | mW |
| ESD Protection, Contact Discharge per IEC 61000-4-2 Standard | ±12 kV | - |
| Clamping Voltage | 9 V | - |
| Channel Clamp Voltage (Positive/Negative Transients) | +9 / -1.4 V | - |
| OUT Capacitance | 1.5 pF | - |
| Channel to Channel Capacitance Match | 0.02 pF | - |
Key Features
- Dual-Stage ESD Protection: The CM1231-02SO features the PicoGuard XP dual-stage ESD architecture, which significantly enhances system-level ESD protection by reducing peak clamping voltage and residual ESD current.
- Low Capacitance: Designed to minimize capacitive loading, making it suitable for high-speed data lines such as USB 2.0.
- High ESD Protection: Protects against ESD pulses up to ±12 kV contact discharge per the IEC 61000-4-2 standard.
- Flow-Through Routing: Features easily routed “pass-through” differential pinouts in a 6-lead SOT23 package for high-speed signal integrity.
- Improved Signal Integrity: The device includes series resistors and inductive elements that help in reducing the ESD strike current and improving signal integrity by balancing capacitive loading effects.
- Pb-Free and RoHS Compliant: The device is lead-free and compliant with RoHS standards.
Applications
- USB Devices Data Port Protection: Ideal for protecting USB interfaces from ESD damage.
- General High-Speed Data Line ESD Protection: Suitable for protecting high-speed data lines in various electronic systems.
Q & A
- What is the CM1231-02SO designed for?
The CM1231-02SO is designed for protecting next-generation deep submicron ASICs and high-speed data lines from ESD damage.
- What is the PicoGuard XP architecture?
The PicoGuard XP architecture is a dual-stage ESD protection design that significantly enhances system-level ESD protection by reducing peak clamping voltage and residual ESD current.
- What is the maximum ESD protection level of the CM1231-02SO?
The CM1231-02SO protects against ESD pulses up to ±12 kV contact discharge per the IEC 61000-4-2 standard.
- What package type does the CM1231-02SO come in?
The CM1231-02SO comes in a 6-lead SOT23 package.
- Is the CM1231-02SO Pb-Free and RoHS compliant?
Yes, the CM1231-02SO is lead-free and compliant with RoHS standards.
- What is the operating temperature range of the CM1231-02SO?
The operating temperature range of the CM1231-02SO is -40°C to +85°C.
- What is the typical clamping voltage of the CM1231-02SO?
The typical clamping voltage of the CM1231-02SO is 9 V.
- How does the CM1231-02SO improve signal integrity?
The device includes series resistors and inductive elements that help in reducing the ESD strike current and improving signal integrity by balancing capacitive loading effects.
- What are the recommended placement guidelines for the CM1231-02SO?
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 ESD device.
- Does the CM1231-02SO require an additional bypass capacitor?
Generally, the CM1231-02SO does not require an additional bypass capacitor, but a 0.22 μF ceramic chip capacitor between VP and the ground plane can be used for optimal performance.
