Littelfuse SP724 Lead-Free_Green Series - Manual (Page 3)

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/25/13
TVS Diode Arrays
(SPA ® Diodes)
General Purpose ESD Protection - SP724 Series
ESD Capability
ESD rating is dependent on the defined test standard. The
evaluation results for various test standards and methods
based on Figure 1 are shown in Table 1.3
The SP724 has a Level 4 rating when tested to the IEC
61000-4-2 Human Body Model (HBM) standard and
connected in a circuit in which the V+ and V- pins have
a return path to ground. Level 4 specifies a required
capability greater than 8kV for direct discharge and greater
than 15kV for air discharge.
The “Modified” MIL-STD-3015.7 condition is defined as an
“in-circuit” method of ESD testing, the V+ and V- pins have
a return path to ground.The SP724 ESD capability is greater
than 8kV with 100pF discharged through 1.5kΩ. By strict
definition of the standard MIL-STD-3015.7 method using
“pin-to-pin” device testing, the ESD voltage capability is
greater than 2kV.
For the SP724 EIAJ IC121 Machine Model (MM) standard,
the ESD capability is typically greater than 1.8kV with
200pF discharged through 0kΩ.
The Charged Device model is based upon the self-
capacitance of the SOT-23 package through 0kΩ.
Standard Type/Mode R
D
C
D
±V
D
IEC 61000-4-2
(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 8kV †
Standard HBM 1.5k Ω 100pF 2kV
EIAJ IC121 Machine Model 0k Ω 200pF 400V
US ESD DS 5.3
Charged Device
Model
0k Ω NA 3kV
H.V.
SUPPLY
V D
IN
DUT
C
D
R
1
IEC 1000-4-2: R
1
50 to 100M
R
D
CHARGE
SWITCH
DISCHARGE
SWITCH
MIL STD 3015.7: R 1 1 to 10M
FIGURE 1. ELECTR OSTATIC DISCHARGE TEST
†Upper limit of laboratory test set.
600 800 1000 1200
200
160
120
80
40
0
SINGLE PULSE
T
A
= 25°C
FORWARD SCR VOLTAGE DROP (mV)
FOR
W
ARD SCR CURRENT (mA)
5
4
3
2
1
0
T
A
= 25°C
SINGLE PULSE
EQUIV. SAT. ON
THRESHOLD ~ 1.1V
FORWARD SCR VOLTAGE DROP (V)
0 1 2 3
FO
RW
ARD SCR CURRENT (A
)
600 800 1000 1200
200
160
120
80
40
0
SINGLE PULSE
T
A
= 25°C
FORWARD SCR VOLTAGE DROP (mV)
FOR
W
ARD SCR CURRENT (mA)
5
4
3
2
1
0
T
A
= 25°C
SINGLE PULSE
EQUIV. SAT. ON
THRESHOLD ~ 1.1V
FORWARD SCR VOLTAGE DROP (V)
0 1 2 3
FO
RW
ARD SCR CURRENT (A
)
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