'Protecting' related articles 1

  1. 2008/04/26 SP725 - Silicon Protection Arrays

Description
The SP725 is an array of SCR/Diode bipolarstructures for ESD and overvoltage protection of sensitive inputs 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 dusigned for fast triggering at athreshold 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.
Refer to Fig 1 and Table 1 for further detaels.
Refer to Application Note AN9304 and AN9612 for furter detail.

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 ㎲ Peak Pulse Current.....± 14 A
- Single Transeint Pulse, 100㎲ Pulse Width ......± 8 A
* Designes to Provede 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˚C Typical
* Low input Capacitance.........................5 ㎊ Typical
* An Array of 4 SCR/Diode Pairs
* Operating Temperature Range...........-40 ˚C to 105 ˚C

Applications
* Microprocessor/Logic
* Data Bus Protection
* Analog Device input Protection
* Voltage Clamp

SP725ABG
SP725ABTG

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