Littelfuse SP720ABTG

The SP720 is an array of SCR/Diode bipolar structures for ESD and over-voltage protection to sensitive input circuits. The SP720 has 2 protection SCR/Diode device structures per input. A total of 14 available inputs can be used to protect up to 14 external signal or bus lines. Over-voltage protection is from the IN (pins 1 - 7 and 9 - 15) to V+ or V-. The SCR structures are designed for fast triggering at a threshold of one +VBE diode threshold above V+ (Pin 16) or a -VBE diode threshold below V- (Pin 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. Standard ESD Human Body Model (HBM) Capability is:

• ESD Interface Capability for HBM Standards
  • MIL STD 3015.7: 15kV
  • IEC 61000 - 4 - 2, Direct Discharge, Single Input: 4kV (Level 2)
  • IEC 61000 - 4 - 2, Direct Discharge, 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 Risetime
• Low Input Leakages: 1nA at 25°C (Typ)
• Low Input Capacitance: 3pF (Typ)
• An Array of 14 SCR/Diode Pairs
• Operating Temperature Range: -40°C to 105°C

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