SP721ABT

用于ESD和过压保护的电子保护阵列 Electronic Protection Array for ESD and Overvoltage Protection

The SP721 is an array of SCR/Diode bipolar structures for ESD and over-voltage protection to sensitive input circuits. The SP721 has 2 protection SCR/Diode device structures per input. There are a total of 6 available inputs that can be used to protect up to 6 external signal or bus lines. Over-voltage protection is from the IN Pins 1 - 3 and Pins 5 - 7 to V+ or V-.

The SCR structures are designed for fast triggering at a threshold of one +VBE diode threshold above V+ Pin 8 or a -VBE diode threshold below V- Pin 4. From an IN input, a clamp to V+ is activated if a transient pulse causes the input to be increased to a voltage level greater than one VBE above V+. A similar clamp to V- is activated if a negative pulse, one VBE less than V-, is applied to an IN input.

Features

• ESD Interface Capability for HBM Standards

   - MIL STD 3015.7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15kV

   - IEC 61000-4-2, Direct Discharge,

   - Single Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4kV Level 2

   - Two Inputs in Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . 8kV Level 4

   - IEC 61000-4-2, Air Discharge . . . . . . . . . . . . . . . . . . 15kV Level 4

• High Peak Current Capability

   - IEC 61000-4-5 8/20µs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3A

   - Single Pulse, 100µs Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . ±2A

   - Single Pulse, 4µs Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . ±5A

• Designed to Provide Over-Voltage Protection

   - Single-Ended Voltage Range to . . . . . . . . . . . . . . . . . . . . . . . . +30V

   - Differential Voltage Range to. . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V

• Fast Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2ns Rise Time

• Low Input Leakages . . . . . . . . . . . . . . . . . . . . . . . . 1nA at 25°C Typical

• Low Input Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3pF Typical

• An Array of 6 SCR/Diode Pairs

• Operating Temperature Range . . . . . . . . . . . . . . . . . . . . -40°C to 105°C

Applications

• Microprocessor/Logic Input Protection

• Data Bus Protection

• Analog Device Input Protection

• Voltage Clamp