SP721AB Littelfuse Inc, SP721AB Datasheet - Page 4

• Manufacturer Part Number: SP721AB
• Description: TVS ARRAY ESD 6 INPUT 8-SOIC
• Manufacturer: Littelfuse Inc
• Series: SP721r

Specifications of SP721AB

• Package / Case: 8-SOIC (3.9mm Width)
• Voltage - Working: 30V
• Technology: Mixed Technology
• Number Of Circuits: 6
• Applications: General Purpose
• Current Rating: +/- 5 A
• Forward Voltage Drop: 2 V
• Operating Voltage: 2 V to 30 V
• Channels: 6 Channels
• Capacitance: 3 pF
• Operating Temperature Range: - 40 C to + 105 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -
• Voltage - Clamping: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: F2165

TVS Diode Arrays
SP721
Electronic Protection Array for ESD and Overvoltage Protection
Peak Transient Current Capability of the SP721
The peak transient current capability rises sharply as the width of the
current pulse narrows. Destructive testing was done to fully evaluate the
SP721’s ability to withstand a wide range of peak current pulses vs time.
The circuit used to generate current pulses is shown in Figure 5.
The test circuit of Figure 5 is shown with a positive pulse input. For a
negative pulse input, the (-) current pulse input goes to an SP721 ‘IN’
input pin and the (+) current pulse input goes to the SP721 V- pin. The
V+ to V- supply of the SP721 must be allowed to float. (i.e., It is not tied
to the ground reference of the current pulse generator.) Figure 6 shows
the point of overstress as defined by increased leakage in excess of the
data sheet published limits.
The maximum peak input current capability is dependent on the ambient
temperature, improving as the temperature is reduced. Peak current
curves are shown for ambient temperatures of 25
power supply condition. The safe operating range of the transient peak
current should be limited to no more than 75% of the measured over-
stress level for any given pulse width as shown in the curves of Figure 6.
Note that adjacent input pins of the SP721 may be paralleled to improve
current (and ESD) capability. The sustained peak current capability is
increased to nearly twice that of a single pin.
FIGURE 6. SP721 TYPICAL SINGLE PULSE PEAK CURRENT CURVES SHOWING THE MEASURED POINT OF OVERSTRESS IN
7
6
5
4
3
2
1
0
0.001
AMPERES vs PULSE WIDTH TIME IN MILLISECONDS
T
A
= 105
0.01
o
C
o
C and 105
T
A
= 25
o
C
0.1
o
C and a 15V
w w w . l i t t e l f u s e . c o m
CAUTION: SAFE OPERA TING CONDITIONS LIMIT
V+ TO V- SUPPLY = 15V
PULSE WIDTH TIME (ms)
THE MAXIMUM PEAK CURRENT FOR A GIVEN
PULSE WIDTH TO BE NO GREATER THAN 75%
OF THE VALUES SHOWN ON EACH CURVE.
1
R
V
C1 ~ 100µF
X
1
FIGURE 5. TYPICAL SP721 PEAK CURRENT TEST CIRCUIT
~ 10Ω TYPICAL
ADJ. 10V/A TYPICAL
-
+
V
X
WITH A VARIABLE PULSE WIDTH INPUT
VOLTAGE
PROBE
10
R
1
(+)
CURRENT
1
2
3
4
SENSE
VARIABLE TIME DURATION
CURRENT PULSE GENERA TOR
IN
IN
IN
V-
SP721
100
V+
IN
IN
IN
8
7
6
5
(-)
C1
1000
+
-
237
5