SP4040 Datasheet, PDF (1/5 Pages) Littelfuse – The SP4040 provides overvoltage protection for applications such as 10/100/1000 Base-T Ethernet and T3/E3 interfaces.

TVS Diode Arrays (SPA^™Family of Products)
Lightning Surge Protection - SP4040 Series
SP4040 Series 3.3V 75A Rail Clamp Array
RoHS Pb GREEN
Pinout
1
8
2
7
3
6
4
5
SO-8 (Top View)
Note: Pinout diagrams above shown as device footprint on circuit board.
Functional Block Diagram
Line in
Pin 1 and 8
Line out
Pin 2, 3, 6,
and 7
Line in
Pin 4 and 5
Line out
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.
Description
The SP4040 provides overvoltage protection for
applications such as 10/100/1000 Base-T Ethernet and T3/
E3 interfaces. This device has a low capacitance of only
5pF making it suitable for PHY side Ethernet protection
and the capability to protect against both longitudinal and
differential transients. Furthermore, the SP4040 is rated
up to 100A (tp=2/10µs) making it suitable for line side
protection as well against lightning transients as defined
by GR-1089 (intra-building), ITU, YD/T, etc. The application
schematic provides the connection information for a PHY
side protection scheme of a single differential pair.
Features
• Lightning protection,
IEC61000-4-5, 75A
(8/20µs)
• Low clamping voltage
• Low insertion loss, log-
linear capacitance
• Combined longitudinal
and metallic protection
• Clamping speed of
nanoseconds
• MS-012 surface mount
package (JEDEC SO-8)
• UL 94V-0 epoxy molding
• RoHS compliant
Applications
• T1/E1 Line cards
• 10/100/1000 BaseT
Ethernet
Application Example
TeleLink (0461 1.25)
• T3/E3 and DS3 Interfaces
• STS-1 Interfaces
1
8
2
7
3
6
4
5
SP4040-02BTG
to chipset
(Ethernet PHY,
T3/E3 PHY, etc.)
The schematic shows protection for a single differential
pair as part of a larger high-speed data interface such as
Ethernet. The SP4040 provides both metallic (differential)
and longitudinal (common mode) protection from lightning
induced surge events as specified by regulatory standards
such as Telcordia’s GR-1089 CORE and ITU K.20 and 21.
The SP4040 protects against both positive and negative
induced surge events while the TeleLink fuse provides
overcurrent protection for the long term 50/60 Hz power
fault events.
SP4040 Series
188
Revision: September 13, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/SPA for current information.