MAX13345E Maxim Integrated Products, MAX13345E Datasheet - Page 12

• Manufacturer Part Number: MAX13345E
• Description: (MAX13342E / MAX13345E) 3-Wire Interface Full Speed USB Transceivers
• Manufacturer: Maxim Integrated Products

The MAX13342E/MAX13345E feature ±15kV (HBM) ESD
protection on D+ and D-. The ESD structures withstand
high ESD in all states: normal operation, suspend, and
powered down. For the ±15kV ESD structures to work
correctly, a 1µF or greater capacitor must be connected
from V
for protection to the following limits:
• ±15kV using the Human Body Model
• ±8kV using the IEC 61000-4-2 Contact Discharge
• ±8kV using the IEC 61000-4-2 Air-Gap Method
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Figure 11 shows the Human Body Model, and Figure
12 shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
3-Wire Interface Full-Speed USB Transceivers
With/Without Internal Series Resistors
Figure 2. Adding External Resistors to the USB Connector for the MAX13342E
12
Method
______________________________________________________________________________________
TRM
to GND. V
BUS
INTERFACE
VOLTAGE
SYSTEM
SYSTEM
SUPPLY
and D+/D- are characterized
ESD Protection
ESD Test Conditions
0.1µF
Human Body Model
V
BD
DAT
SEO
OE
ENUM
SUS
L
MAX13342E
V
V
GND
TRM
BUS
D+
D-
a 100pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the test device
through a 1.5kΩ resistor.
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment; it does not specifi-
cally refer to integrated circuits. The MAX13342E/
MAX13345E help the user design equipment that meets
level 4 of IEC 61000-4-2, without the need for additional
ESD-protection components. The major difference
between tests done using the Human Body Model and
IEC 61000-4-2 is a higher peak current in IEC 61000-4-
2 because series resistance is lower in the IEC 61000-
4-2 model. Hence, the ESD withstand voltage
measured to IEC 61000-4-2 is generally lower than that
measured using the Human Body Model. Figure 13
shows the IEC 61000-4-2 model. The Air-Gap
Discharge Method involves approaching the device
with a charged probe. The Contact Discharge Method
connects the probe to the device before the probe
is energized.
1.0µF
1.0µF
31.6Ω
31.6Ω
USB CONNECTOR
D+
D-
GND
USB
POWER
IEC 61000-4-2