Diode array Littelfuse

The SP725 is an array of SCR/Diode bipolar structures for ESD and overvoltage protection of sensitive input circuits. The SP725 has 2 protection SCR/Diode device structures per input. There are a total of 4 available inputs that can be used to protect up to 4 external signal or bus lines. Overvoltage protection is from the IN (Pins 1 - 4) to V+ or V-.

The SCR structures are designed for fast triggering at a threshold of one +VBE diode threshold above V+ (Pin 5,6) or one –VBE diode threshold below V- (Pin 7,8). 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 per HBM Standards

IEC 61000-4-2, Direct Discharge........... 8kV (Level 4)
IEC 61000-4-2, Air Discharge................15kV (Level 4)
MIL-STD-3015.7..................................................25kV
Peak Current Capability

IEC 61000-4-5 8/20 μs Peak Pulse Current...... ± 14 A
Single Transient Pulse, 100 μs Pulse Width....... ± 8A
Designed to Provide Over-Voltage Protection

Single-Ended Voltage Range to......................... +30V
Differential Voltage Range to............................. ±15V
Fast Switching...............................................2ns Risetime
Low Input Leakages...........................5 nA at 25 ºC Typical
Low Input Capacitance....................................5 pF Typical
An Array of 4 SCR/Diode Pairs
Operating Temperature Range..................-40ºC to 105ºC