Datasheet

−
+
DUT
R
D
1.5 kΩ
V
HBM
100 pF
C
S
MAX3243E
www.ti.com SLLS657D –APRIL 2005– REVISED SEPTEMBER 2011
APPLICATION INFORMATION
ESD Protection
TI MAX3243E devices have standard ESD protection structures incorporated on the pins to protect against
electrostatic discharges encountered during assembly and handling. In addition, the RS232 bus pins (driver
outputs and receiver inputs) of these devices have an extra level of ESD protection. Advanced ESD structures
were designed to successfully protect these bus pins against ESD discharge of ±15-kV in all states: normal
operation, shutdown, and powered down. The MAX3243E devices are designed to continue functioning properly
after an ESD occurrence without any latchup.
The MAX3243E devices have three specified ESD limits on the driver outputs and receiver inputs, with respect to
GND:
• ±15-kV Human Body Model (HBM)
• ±15-kV IEC61000-4-2, Air-Gap Discharge (formerly IEC1000-4-2)
• ±8-kV IEC61000-4-2, Contact Discharge
ESD Test Conditions
ESD testing is stringently performed by TI, based on various conditions and procedures. Please contact TI for a
reliability report that documents test setup, methodology, and results.
Human Body Model (HBM)
The Human Body Model of ESD testing is shown in Figure 7, while Figure 8 shows the current waveform that is
generated during a discharge into a low impedance. The model consists of a 100-pF capacitor, charged to the
ESD voltage of concern, and subsequently discharged into the DUT through a 1.5k-Ω resistor.
Figure 7. HBM ESD Test Circuit
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Product Folder Link(s): MAX3243E