SP721ABT - SP721 Series

Series: SP721
Obsolete: 2008 -05-08 Replaced By: SP721ABTG Availability: Obsolete

Obsolete
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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 orbus 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.

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

Applications:

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

Property (Mouseover for details) Value
Reverse Standoff Voltage (V) 30
ESD, Contact Discharge (kV) 4
ESD, Air Discharge (kV) 15
Lightning Immunity (8x20us) 3
Typical Capacitance (pF) 3
Polarity Bidirectional
Channels 6
Sample Request No
Replaced By Part Number SP721ABTG
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