Littelfuse TVS Diode Arrays (SPA ® family of devices) are an ideal choice for suppressing ESD and other electrical transients as their speed and clamping levels are essential to protect today's integrated circuits. The capacitance measured between the input pin and either supply pin at 1MHz/1VRMS applied. The maximum DC current into V+/V- pins with Vsupply at its maximum voltage Input Capacitance: The DC current that is measured at the input pins at the stated voltage supplied to the input. Maximum voltage which can be measured across the protector when subjected to the maximum peak pulse current.
Maximum of state current measured at specified voltage. This is to ensure that SPA's do not clip the circuit drive voltage. The device VR should be equal to, or greater than the peak operating level of circuit (or part of the circuit) to be protected. The maximum reverse voltage drop between an input pin and respective power supply pin for a specific reverse current. The maximum forward voltage drop between an input pin and respective power supply pin for a specific forward current. These devices 'float' between the input and power supply rails and thus the same device can operate at any potential within its range. The SCR/Diode arrays do not have a fixed breakover or operating voltage. The range limits of the power supply voltage that may be across the V+ and V- terminals. Definitions and Terms Operating Voltage Range (Vsupply): The device must withstand multiple ESD/EFT pulses as specified in the IEC 6. The device package must have a small footprint and low height to enable a high density Printed Circuit Board (PCB) layout. The device capacitance must be low enough to reduce input signal distortion. In normal operation, the reverse stand off voltage must be higher than the equipment supply/working voltage, with low leakage current to prevent power supply loading. During over-voltage fault conditions, the device must have a low clamp voltage at the specified current wave form to protect sensitive IC's and ports. This prevents the device from exceeding its voltage rating. These devices work in two ways, first, they absorb transients with diodes, to steer the current, and then, an avalanching or zener diode, clamps the voltage levels. Littelfuse SPA ® TVS Diode Arrays, provide high level protection against ESDs, Electromagnetic Interferences (EMI), Electrical Fast Transients (EFT) and Lightning, mainly for sensitive digital and analogue input circuits, on data, signal, or control lines operating on power supplies.
For more robust applications, SP03-xx and SP30xx devices are available for EFT and Lightning transient threats per IEC 6/5.Įlectrostatic Discharge (ESD) is an electrical transient that poses a serious threat to electronic circuits. Littelfuse TVS Diode Arrays offer a high level of protection (up to 30kV per IEC 6) with very low capacitance, leakage current and clamp voltage. Littelfuse tvs diode arrays are available in a range of packaging configurations including DIP, SOIC, MSOP, SOT23, SOT143, SC70, SOT5x3, SOT953, ♝FN, SOD723, and flipchip.
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They offer an ideal protection solution for I/O interfaces and digital and analog signal lines, in computer and consumer portable electronics markets.
Littelfuse TVS Diode Arrays (SPA® silicon protection arrays) are designed to protect electronics from very fast and often damaging voltage transients, such as lightning and electrostatic discharge (ESD).