Description
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. Overvoltage protection is from the IN (Pins 1 - 3 and Pins 5 - 7) to V+ or V-.

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 25ºC Typical
• Low Input Capacitance.....................................3pF Typical
• An Array of 6 SCR/Diode Pairs
• Operating Temperature Range....................-40ºC to 105ºC

Applications
• Microprocessor/Logic Input Protection
• Data Bus Protection
• Analog Device Input Protection
• Voltage Clamp