SP721 Datasheet | Littelfuse

TVS Diode Arrays 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. Standard ESD Human Body Model (HBM) Capability is: Features HBM STANDARD IEC 61000-4-2 Air Direct Direct, Dual Pins MIL-STD-3015.7 Direct, In-Circuit MODE R 330Ω 330Ω 330Ω 1.5kΩ C 150p F 150p F 150p F 100p F ESD (V) >15k V >4k V >8k V >15k V - ESD Interface Capability for HBM Standards - MIL STD 3015.7 - - - - - - - . 15k V - IEC 61000-4-2, Direct Discharge, - Single Input- - - - - - . . . . 4k V (Level 2) - Two Inputs in Parallel - - - - - . 8k V (Level 4) - IEC 61000-4-2, Air Discharge - - - . . . 15k V (Level 4) - High Peak Current Capability - IEC 61000-4-5 (8/20µs)- - - - - - . ....