Littelfuse SP721 Lead-Free_Green Series - Manual (Page 2)

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/24/13
TVS Diode Arrays
(SPA ® Diodes)
General Purpose ESD Protection - SP721 Series
Absolute Maximum Ratings
Parameter Rating Units
Continuous Supply Voltage, (V+) - (V-) +35 V
Forward Peak Current, I
IN
to V
CC
, I
IN
to GND
(Refer to Figure 5)
±2, 100µs A
Electrical Characteristics T
A
= -40 o C to 105 o C, V
IN
= 0.5V
CC
, Unless Otherwise Specified
Thermal Information
Parameter Rating Units
Thermal Resistance (Typical, Note 1) θ
JA
o C/W
PDIP Package 160 o C/W
SOIC Package 170 o C/W
Maximum Storage Temperature Range -65 to 150 o C
Maximum Junction Temperature (Plastic
Package)
150 o C
Maximum Lead Temperature
(Soldering 20-40s)(SOIC Lead Tips Only)
260 o C
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
SUPPLY
- 2 to 30 - V
V
SUPPLY
= [(V+) - (V-)]
Forward Voltage Drop
IN to V- V
FWDL
I
IN
= 1A (Peak Pulse) - 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
FWD
/I
FWD
; Note 3 - 1 - Ω
Input Capacitance C
IN
- 3 - pF
Input Switching Speed t
ON
- 2 - ns
Note:
ESD Ratings and Capability (Figure 1, Table 1)
Load Dump and Reverse Battery (Note 2)
1. θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Notes:
2. In automotive and battery operated systems, the power supply lines should be externally protected for load dump and reverse battery. When the V+ and V- Pins are connected to het same
supply voltage source as the device or control line under protection, a current limiti ng resistor should be connected in series between the external supply and the SP721 supply pins to
limit reverse battery current to within the rated maximum limits. Bypass capacitors of typically 0.01µF or larger romf 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.
FIGURE 4. TYPICAL APPLICATION OF THE SP721 AS AN INPUT CLAMP FOR OVER-VOLTAGE, GREATER THAN 1V BE ABOVE V+ OR
LESS THAN -1V BE BELOW V-
+VCC
INPUT
DRIVERS
SP721 INPUT PROTECTION CIRCUIT (1 OF 6 SHO WN)
OR
SIGNAL
SOURCES
IN 5 - 7 IN 1 - 3
SP721
V-
TO +VCC
LINEAR OR
DIGITAL IC
INTERFACE
V+
+VCC
(Application as an Input Clamp for Over-voltage, Greater
than 1V
BE
Above V+ or less than -1V
BE
below V-)
Typical Application of the SP721