ESD8011

www.onsemi.com

5

Latch−Up Considerations

ON Semiconductor’s 8000 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

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

transient. Because of this, ESD8011 should not be used for

HDMI applications − ESD8104 or ESD8040 have been

designed to be acceptable for HDMI applications without

latch−up. Please refer to Application Note AND9116/D for

a more in−depth explanation of latch−up considerations

using ESD8000 series devices.

I

I

V

V

ESD8011 Latch−up free:

USB 2.0 LS/FS, USB 2.0 HS, USB 3.0 SS,

DisplayPort

ESD8011 Potential Latch−up:

HDMI 1.4/1.3a TMDS

Figure 4. Example Load Lines for Latch−up Free Applications and Applications with the Potential for Latch−up

Table 1. SUMMARY OF SCR REQUIREMENTS FOR LATCH−UP FREE APPLICATIONS

Application

VBR (min)

IH (min)

VH (min)

ON Semiconductor ESD8000 Series

(V)

(mA)

(V)

Recommended PN

HDMI 1.4/1.3a TMDS

3.465

54.78

1.0

ESD8104, ESD8040

USB 2.0 LS/FS

3.301

1.76

1.0

ESD8004, ESD8011

USB 2.0 HS

0.482

N/A

1.0

ESD8004, ESD8011

USB 3.0 SS

2.800

N/A

1.0

ESD8004, ESD8006, ESD8011

DisplayPort

3.600

25.00

1.0

ESD8004, ESD8006, ESD8011