Littelfuse SRDA3.3 Series - Manual

1 ©2013 Littelfuse, Inc.
Specifi cations are subject to change without notice.
Please refer to
www.littelfuse.com for current information.
TVS Diode Arrays (SPA ® Diodes)
Revision: June 14, 2013
Lightning Surge Protection- SRDA3.3 Series
SRD
A3.3
SRDA3.3 Series
Description
Applications
The SRDA3.3 integrates low capacitance rail-to-rail diodes
with an additional zener diode to protect I/O pins against
ESD and lightning induced surge events. This device can
safely absorb up to 35A per IEC61000-4-5 (tp=8/20μs)
without performance degradation and a minimum
±30kV ESD per IEC61000-4-2 international standard. Its
low loading capacitance makes it ideal for high-speed
interfaceprotection.
Features
• Lightning protection,
IEC61000-4-5, 35A
(8/20μs)
• EFT, IEC61000-4-4, 50A
(5/50ns)
• ESD, IEC61000-4-2,
±30kV contact, ±30kV air
• Low clamping voltage
• Low leakage current
• SOIC-8 surface mount
package (JEDEC MS-012)
Functional Block Diagram
Pinout
Note: Pinout diagrams above shown as device footprint on circuit board.
SOIC-8 (Top View)
1
2
3
5 4
6
7
8 I/O 1
I/O 2
I/O 3
I/O 4 Ref 1
Ref 1
Ref 2
Ref 2
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
Application Example
1 4
5 8
SRDA3.3-4
T1/E1/T3/E3 Interface Protection
T1/E1/T3/E3
Transceiver
R Tip
R Ring
T Tip
T Ring
SRDA3.3 Series 8pF 35A Diode Array
• Tertiary (IC Side)
Protection:
- T1/E1/T3/E3
- HDSL/SDSL
- Ethernet
• RS232, RS485
• Video Line Protection
• Security Cameras
• Storage DVRs
• Network Equipment
• Instrumentation, Medical
Equipment
I/O 1
I/O 3
I/O 2
I/O 4 Ref 2
Ref 1