## PUSB220L-AG6-R: Technical Overview The **PUSB220L-AG6-R** is a high-performance ESD (Electrostatic Discharge) protection diode array specifically designed to protect high-speed data interfaces. It is commonly used in USB 2.0 and HDMI ports to prevent sensitive ICs from being damaged by static electricity or voltage surges. --- ### 1. Key Technical Specifications | Parameter | Specification | Description | | :--- | :--- | :--- | | **Circuit Configuration** | 2-Channel (Rail-to-Rail) | Protects two data lines (e.g., D+ and D-). | | **Peak Pulse Current (Ipp)** | ~3.5A to 5A | The maximum surge current the device can handle. | | **Capacitance (Cj)** | < 1.0 pF (Low) | Low capacitance ensures signal integrity for high-speed data. | | **Working Voltage (Vrwm)** | 5.0 V | The maximum operating voltage where the diode remains idle. | | **Breakdown Voltage (Vbr)** | 6.0 V (Typical) | The voltage at which the diode begins to conduct to ground. | | **Package Type** | SOT-26 / SC-74 | Small surface-mount package for space-constrained PCBs. | --- ### 2. Functional Description The device employs a **rail-to-rail** architecture. It consists of two sets of steering diodes and a Zener diode: 1. **Steering Diodes:** These route positive or negative ESD pulses away from the data line and toward the power supply rail ($V_{CC}$) or Ground ($GND$). 2. **Zener Diode:** Acts as a central clamp, absorbing the energy of the surge to prevent the supply voltage from spiking too high. ### 3. Applications Due to its ultra-low capacitance, this part is ideal for: * **USB 2.0:** High-speed data lines (480 Mbps). * **DVI / HDMI:** Video signal protection. * **Ethernet:** 10/100/1000 Base-T ports. * **Portable Electronics:** Smartphones, laptops, and tablets. --- ### 4. Typical Pin Configuration (SOT-26) ```text +-------+-------+ | 1 2 3 | 1: I/O 1 (Data Line 1) | [ ] [ ] [ ] | 2: GND (Ground) | | 3: I/O 2 (Data Line 2) | [ ] [ ] [ ] | 4: N/C (No Connection) | 6 5 4 | 5: Vcc (Supply Rail) +-------+-------+ 6: N/C ``` ---