SP721AP datasheet(3/6 Pages) HARRIS

Part #	SP721AP

Description	ELECTRONIC PROTECTION ARRAY FOR ESD AND OVER-VOLTAGE PROTECTION

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Manufacturer	HARRIS [Harris Corporation]

Direct Link	http://www.harris.com

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6-11

FIGURE 2. LOW CURRENT SCR FORWARD VOLTAGE DROP

CURVE

FIGURE 3. HIGH CURRENT SCR FORWARD VOLTAGE DROP

CURVE

FIGURE 4. TYPICAL APPLICATION OF THE SP721 AS AN INPUT CLAMP FOR OVER-VOLTAGE, GREATER THAN 1VBE ABOVE V+ OR

LESS THAN -1VBE BELOW V-

600

800

1000

1200

FORWARD SCR VOLTAGE DROP (mV)

100

80

60

40

20

0

TA = 25

oC

SINGLE PULSE

2.5

2

1.5

1

0.5

0

TA = 25

oC

SINGLE PULSE

VFWD

IFWD

01

2

3

FORWARD SCR VOLTAGE DROP (V)

EQUIV. SAT. ON

THRESHOLD ~ 1.1V

+VCC

INPUT

DRIVERS

SP721 INPUT PROTECTION CIRCUIT (1 OF 6 SHOWN)

OR

SIGNAL

SOURCES

IN 5 - 7

IN 1 - 3

SP721

V-

TO +VCC

LINEAR OR

DIGITAL IC

INTERFACE

V+

+VCC

SP721

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SP721AP Datasheet(PDF) 3 Page - Harris Corporation

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