Description

​​​​​​​The SP723 is an array of SCR/Diode bipolar structures for ESD and over-voltage protection of sensitive input circuits. The SP723 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.

Refer to Fig 1 and Table 1 for further details. Refer to Application Note AN9304 and AN9612 for further 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 8/20µs Peak Pulse Current. . . . . . . . . . . . . . . . . ±7A

- Single Transient Pulse, 100s Pulse Width. . . . . . . . . . . . . . . . . . ±4A

• Designed to Provide Over-Voltage Protection

- Single-Ended Voltage Range to . . . . . . . . . . . . . . . . . . . . . . . . +30V

- Differential Voltage Range to. . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V

• Fast Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2ns Risetime

• Low Input Leakages . . . . . . . . . . . . . . . . . . . . . . . . 2nA at 25°C Typical

• Low Input Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5pF 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