2

SURFACE MOUNT ESD SUPPRESSORS

8-Line CA10

DEFINITIONS

Trigger Voltage: The measured peak voltage across the ESD

suppressor before it transitions from high to low resistance.

It is manifested as a “spike” before the clamping voltage is

achieved. This voltage is typically well below the damage

threshold of on-chip IC protection.

Clamping Voltage: The voltage level to which the ESD

impulse voltage is reduced. This is the voltage that the sup-

pressor holds at, until the ESD transient energy is dissipat-

ed.

ESD Impulse Voltage: Also known as the ESD Threat Voltage.

This is the voltage that is “zapped” into the circuit. Voltages

generated by people can exceed 15 kV. The IEC 61000-4-2

defines four levels of impulse voltage for testing

purposes:

SEVERITY LEVEL

1

2

3

4

AIR DISCHARGE

2 kV

4 kV

8 kV

15 kV

DIRECT DISCHARGE

2 kV

4 kV

6 kV

8 kV

+

+

++

+

+

+

T

w

D

s

P

h

D

d

P

s

P

w

P

d

C

t

T

t

Carrier Tape Specifications

Parts are delivered on 7” (178mm) reel, plastic carrier tape

Description

Measurement (mm)

0.06

1.50

4.00

1.02

5.38

4.00

2.44

0.30

12.00

Trigger Voltage

Clamping Voltage

Time (ns)

Trigger

Voltage

Clamping

Voltage

Voltage (V)

** Note: 1,000 fF = 1 pF

Frequency (GHz)

60

50

1.0

70

40

2.0

1.5

0.5

Generalized PulseGuard Response to ESD

(Positive and Negative Polarity ESD Pulses)

Generalized I-V Curve

(Positive and Negative Polarity ESD Pulses)

Capacitance vs. Frequency