©2011 Littelfuse, Inc.

Specifications are subject to change without notice.

Please refer to

56

Revision: April 14, 2011

SP720 Lead-Free/Green Series

General Purpose ESD Protection - SP720 Series

Absolute Maximum Ratings

Parameter

Rating

Units

Continuous Supply Voltage, (V+) - (V-)

+35

V

Forward Peak Current, I

(Refer to Figure 5)

±2A, 100μs

V

A

= -40

IN

= 0.5V

CC

, Unless Otherwise Specified

Thermal Information

Parameter

Rating

Units

Thermal Resistance (Typical, Note 1)

JA

PDIP Package

90

SOIC Package

130

Maximum Storage Temperature Range

-65 to 150

Maximum Junction Temperature (Plastic

Package)

150

Maximum Lead Temperature (Soldering 10s)

(SOIC Lead Tips Only)

260

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause

permanent damage to the device. This is a stress only rating and operation of the device

at these or any other conditions above those indicated in the operational sections of this

specification is not implied.

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Operating Voltage Range,

V

V

SUPPLY

-

2 to 30

-

V

Forward Voltage Drop:

I

IN to V-

V

FWDL

-2-

V

IN to V+

V

FWDH

-2-

V

Input Leakage Current

I

IN

-20

5

20

nA

Quiescent Supply Current

I

QUIESCENT

-50

200

nA

Equivalent SCR ON Threshold

Note 3

-

1.1

-

V

Equivalent SCR ON Resistance

V

-

1

-

Ω

Input Capacitance

C

IN

-3-

pF

Input Switching Speed

t

ON

-2-

ns

Note:

ESD Ratings and Capability - See Figure 1, Table 1

Load Dump and Reverse Battery (Note 2)

1.

Notes:

2. In automotive and battery operated systems, the power supply lines should be externally protected for load dump and everse battery V+ and V- pins are connected to the same supply

voltage source as the device or control line under protection, a current limiting resistor should be connected in series between the external supply and the SP720 supply pins to limit

reverse battery current to within the rated maximum limits. Bypass capacitors of typically 0.01μF or larger from the V+ and V- pins to ground are recommended.

3. Refer to the Figure 3 graph for definitions of equivalent “SCR ON Threshold” and “SCR ON Resistance.” These characteristics are given here for thumb-rule nformation to determine peak

current and dissipation under EOS conditions.

(Application as an Input Clamp for Over-voltage, greater than 1V

BE

Above V+ or less than -1V

INPUT

DRIVERS

PROTECTION CIRCUIT

(1 OF 14 ON CHIP)

SP720 INPUT

OR

SIGNAL

SOURCES

IN 9-15

IN 1-7

SP720

V-

LINEAR OR

DIGITAL IC

INTERFACE

V+

Typical Application of the SP720