Littelfuse SP724 Lead-Free_Green Series - Manual

© 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
Description
Features
• An Array of 4 SCR/Diode Pairs in 6-Lead SOT-23
• ESD Capability per HBM Standards
- IEC 61000-4-2, Direct Discharge .......... 8kV (Level 4)
- IEC 61000-4-2, Air Discharge ...............15kV (Level 4)
- MIL STD 3015.7 ................................................ >8kV
• Input Protection for Applications with Power Supplies Up
to +20V (Single-Ended Voltage), and ±10V (Differential
Voltage)
• Peak Current Capability
- IEC 61000-4-5 (8/20µs) ....................................... ±3A
- Single Pulse, 100µs Pulse Width ..................... ±2.2A
• Low Input Leakage .......................................... 1nA Typical
• Low Input Capacitance .....................................3pF Typical
• Operating Temperature Range....................-40ºC to 105ºC
Applications
The SP724 is a quad array of transient voltage clamping
circuits designed to suppress ESD and other transient over-
voltage events. The SP724 is used to help protect sensitive
digital or analog input circuits on data, signal, or control
lines operating on power supplies up to 20VDC.
The SP724 is comprised of bipolar SCR/diode structures
to protect up to four independent lines by clamping
transients of either polarity to the power supply rails. The
SP724 offers very low leakage (1nA Typical) and low input
capacitance (3pF Typical). Additionally, the SP724 is rated
to withstand the IEC 61000-4-2 ESD specification for both
contact and air discharge methods to level 4.
The SP724 is connected to the sensitive input line and its
associated power supply lines. Clamping action occurs
during the transient pulse, turning on the diode and fast
triggering SCR structures when the voltage on the input
line exceeds one V
BE
threshold above the V+ supply (or one
V
BE
threshold below the V- supply). Therefore, the SP724P
operation is unaffected by poor power supply regulation or
voltage fluctuations within its operating range.
• Microprocessor/Logic
Input Protection
• Data Bus Protection
• Analog Device Input
Protection
• Voltage Clamp
Pinout
Functional Block Diagram
NOTES:
1. The design of the SP724 SCR/Diode ESD Protection Arrays are
covered by Littelfuse patent 4567500.
2. The full ESD capability of the SP724 is achieved when wired in a
circuit that includes connection to both the V+ and V- pins. When
handling individual devices, follow proper procedures for
electrostatic discharge.
2
V+
V-
IN
3, 4 AND 6
IN
1
5
I/O I/O V+
I/O I/O V–
6 5 4
1 2 3
SP724
(SOT-23)
TOP VIEW
Notes:
1. The design of the SP724 SCR/Diode ESD Protection Arrays are covered by Littelfuse
patent 4567500.
2. The full ESD capability of the SP724 is achieved when wired in a circuit that includes
connection to both the V+ and V- pins. When handling individual devices, follow proper
procedures for electrostatic discharge.
Life Support Note:
Not Intended for Use in Life Support or Life Saving Applications
The products shown herein are not designed for use in life sustaining or life saving
applications unless otherwise expressly indicated.
RoHS Pb GREEN
SP724 Series 3pF 8kV Diode Array
Additional Information
Datasheet Samples Resources