MAX13486E Maxim Integrated Products, MAX13486E Datasheet - Page 13

• Manufacturer Part Number: MAX13486E
• Description: (MAX13485E / MAX13486E) Half Duplex Transceiveer
• Manufacturer: Maxim Integrated Products

Figure 10a. Human Body ESD Test Model
Figure 10b. Human Body Current Waveform
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. The driver outputs and receiver inputs of the
MAX13485E/MAX13486E have extra protection against
static electricity. Maxim’s engineers have developed
state-of-the-art structures to protect these pins against
ESD of ±15kV without damage. The ESD structures
withstand high ESD in all states: normal operation, shut-
down, and powered down. After an ESD event, the
MAX13485E/MAX13486E keep working without latchup
or damage.
ESD protection can be tested in various ways. The trans-
mitter outputs and receiver inputs of the MAX13485E/
MAX13486E are characterized for protection to the follow-
ing limits:
• ±15kV using the Human Body Model
• ±15kV using the Air Gap Discharge Method specified
Half-Duplex RS-485/RS-422 Transceivers in µDFN
VOLTAGE
in IEC 61000-4-2 (MAX13485E only)
SOURCE
AMPS
HIGH-
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT
0
LIMIT RESISTOR
0
t
1MΩ
RL
R
100pF
C
______________________________________________________________________________________
C s
CURRENT WAVEFORM
RESISTANCE
DISCHARGE
STORAGE
CAPACITOR
TIME
1500Ω
R
t
D
DL
+15V ESD Protection
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
DEVICE
UNDER
TEST
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Figure 10a shows the Human Body Model, and Figure
10b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
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. However, it does
not specifically refer to integrated circuits. The
MAX13485E/MAX13486E help equipment designs to
meet 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 higher peak
current in IEC 61000-4-2 because series resistance is
lower in the IEC 61000-4-2 model. Hence, the ESD
Figure 10c. ICE 61000-4-2 ESD Test Model
Figure 10d. IEC 61000-4-2 ESD Generator Current Waveform
t
r
VOLTAGE
SOURCE
= 0.7ns TO 1ns
HIGH-
DC
100%
CHARGE-CURRENT
90%
10%
LIMIT RESISTOR
50MΩ TO 100MΩ
I
R
C
150pF
C s
30ns
RESISTANCE
DISCHARGE
STORAGE
CAPACITOR
330Ω
R
60ns
D
ESD Test Conditions
Human Body Model
IEC 61000-4-2
DEVICE
UNDER
TEST
t
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