ESD9101
www.onsemi.com
6
Latch-Up Considerations
ON Semiconductor’s 9100 series of ESD protection
devices utilize a snap-back, SCR type structure. By using
this technology, the potential for a latch-up condition was
taken into account by performing load line analyses of
common high speed serial interfaces. Example load lines for
latch-up free applications and applications with the potential
for latch-up are shown below with a generic IV
characteristic of a snapback, SCR type structured device
overlaid on each. In the latch-up free load line case, the IV
characteristic of the snapback protection device intersects
the load-line in one unique point (V
OP
, I
OP
). This is the only
stable operating point of the circuit and the system is
therefore latch-up free. In the non-latch up free load line
case, the IV characteristic of the snapback protection device
intersects the load-line in two points (V
OPA
, I
OPA
) and
(V
OPB
, I
OPB
). Therefore in this case, the potential for
latch-up exists if the system settles at (V
OPB
, I
OPB
) after a
transient. Due to its high holding current, the ESD9101 is
suitable for HDMI and 5 V active antenna applications
where previous ESD8000 series devices were not. When
designing this part into the application, please note the
latch−up considerations by performing a loadline analysis
corresponding to the data line and ESD9101’s SCR
characteristics. For a more in-depth explanation of latch-up
considerations please refer to Application Note AND9116/D.
Figure 13. Example Load Lines for Latch−up Free Applications and Applications with the Potential for Latch-up
I
V
V
DD
I
SSMAX
I
OP
V
OP
I
V
V
DD
I
SSMAX
I
OPA
V
OPA
I
OPB
V
OPB
Latch−up Free Condition Potential Latch−up Condition
Table 1. SUMMARY OF SCR REQUIREMENTS FOR LATCH-UP FREE APPLICATIONS
Application
VBR (min)
(V)
IH (min)
(mA)
VH (min)
(V)
HDMI 1.4/1.3a TMDS 3.465 54.78 1.0
USB 2.0 LS/FS 3.301 1.76 1.0
USB 2.0 HS 0.482 N/A 1.0
USB 3.0/3.1 SS 2.800 N/A 1.0
DisplayPort 3.600 25.00 1.0
GPS (Active) 5.200 80.00 1.0
ORDERING INFORMATION
Device Package Shipping
†
ESD9101P2T5G
SOD−923
(Pb−Free)
8000 / Tape & Reel
SZESD9101P2T5G
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.