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
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