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©2012 Littelfuse, Inc.

Specifications are subject to change without notice.

Revision: March 20, 2012

SP723 Lead-Free/Green Series

General Purpose ESD Protection - SP723 Series

ESD Capability

ESD capability is dependent on the application and defined

test standard.The evaluation results for various test

standards and methods based on Figure 1 are shown in

Table 1.

The SP723 has a Level 4 HBM capability when tested as a

device to the IEC 61000-4-2 standard. Level 4 specifies a

required capability greater than 8kV for direct discharge and

greater than 15kV for air discharge.

For the “Modified” MIL-STD-3015.7 condition that is

defined as an “in-circuit” method of ESD testing, the V+

and V- pins have a return path to ground and the SP723

ESD capability is typically greater than 25kV from 100pF

through 1.5kΩ. By strict definition of MIL-STD-3015.7 using

“pin-to-pin” device testing, the ESD voltage capability is

greater than 10kV.

For the SP723 EIAJ IC121 Machine Model (MM) standard,

the ESD capability is typically greater than 2kV from 200pF

with no series resistance.

Standard

Type/Mode

R

D

C

D

±V

D

IEC 1000-4-2

(Level 4)

HBM, Air Discharge

330 Ω

150pF

15kV

HBM, Direct Discharge

330 Ω

150pF

8kV

MIL-

STD-3015.7

Modified HBM

1.5k Ω

100pF

25kV

Standard HBM

1.5k Ω

100pF

10kV

EIAJ IC121

Machine Model

0k Ω

200pF

2kV

EIAJ IC121

Machine Model

0kΩ

200pF

1kV

H.V.

SUPPLY

IN

DUT

CHARGE

SWITCH

DISCHARGE

SWITCH

600

800

1000

1200

200

160

120

80

40

0

T

SINGLE PULSE

FORWARD SCR VOLTAGE DROP (mV)

5

4

3

2

1

0

T

SINGLE PULSE

V FWD

IFWD

THRESHOLD ~ 1.1V

FORWARD SCR VOLTAGE DROP (V)

0

1

2

3

Figure 1: Electrostatic Discharge Test

Table 1: ESD Test Conditions

Figure 3: High Current SCR Forward Voltage Drop Curve

Figure 2: Low Current SCR Forward Voltage Drop Curve