MAX3041CUE+ Maxim Integrated Products, MAX3041CUE+ Datasheet - Page 8

• Manufacturer Part Number: MAX3041CUE+
• Description: IC RS485/422 TRANS QUAD 16TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Transmitterr

Specifications of MAX3041CUE+

• Number Of Drivers/receivers: 4/0
• Protocol: RS422, RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

±10kV ESD-Protected, Quad 5V RS-485/RS-422
Transmitters
The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. It mimics
the stress caused by handling during manufacturing
and assembly. Of course, all pins (not just RS-485
inputs) require this protection during manufacturing.
Therefore, the Machine Model is less relevant to the I/O
ports than are the Human Body Model.
IEC 1000-4-4 Electrical Fast Transient/Burst (EFT/B) is
an immunity test for the evaluation of electrical and
electronic systems during operating conditions. The
test was adapted for evaluation of integrated circuits
with power applied. Repetitive fast transients with
severe pulsed EMI were applied to signal and control
ports. Over 15,000 distinct discharges per minute are
sent to each interface port of the IC or equipment under
test (EUT) simultaneously with a minimum test duration
time of one minute. This simulates stress due to dis-
placement current from electrical transients on AC
mains, or other telecommunication lines in close prox-
imity. Short rise times and very specific repetition rates
are essential to the validity of the test.
Stress placed on the EUT is severe. In addition to the
controlled individual discharges placed on the EUT,
extraneous noise and ringing on the transmission line
can multiply the number of discharges as well as
increase the magnitude of each discharge. All cabling
was left unterminated to simulate worst-case reflections.
The MAX3040–MAX3045 were setup as specified in
IEC 1000-4-4 and the Typical Operating Circuit of this
data sheet. The amplitude, pulse rise time, pulse dura-
tion, pulse repetition period, burst duration, and burst
period
with a digital oscilloscope according to the specifica-
tions in IEC 1000-4-4 sections 6.1.1 and 6.1.2. A simpli-
fied diagram of the EFT/B generator is shown in
7. The burst stresses were applied to Y1–Y4 and Z1–Z4
simultaneously.
IEC 1000-4-4 provides several levels of test severity
(see
stress, a special category “X” beyond the highest level
for severe (transient) industrial environments for
telecommunication lines.
8
_______________________________________________________________________________________
Table
(Figure 8)
±4kV Electrical Fast Transient/Burst Testing
1). The MAX3040–MAX3045 pass the 4000V
of the burst generator were all verified
Machine Model
(IEC 1000-4-4)
Figure
Figure 6a. Human Body ESD Test Model
Figure 6b. Human Body Model Current Waveform
Table 1. Test Severity Levels for
Communication Lines
LEVEL
AMPERES
1
2
3
4
X
VOLTAGE
SOURCE
HIGH-
DC
I
P
36.8%
100%
AND CONTROL
SIGNAL, DATA
90%
10%
CHARGE-CURRENT
0
VOLTAGE
LIMIT RESISTOR
0
ON I/O,
PORTS
PEAK
1000
2000
4000
250
500
1MΩ
t
RL
R
C
100pF
C s
REPETITION
RATE (kHz)
CURRENT WAVEFORM
STORAGE
CAPACITOR
TIME
1.5kΩ
RESISTANCE
DISCHARGE
R
EFT
D
t
DL
5
5
5
5
5
I r
MAX3040–MAX3045
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
ENVIROMENT
Well protected
INDUSTRIAL
MAGNETIC
ELECTRO-
Protected
Typical
Severe
DEVICE
UNDER
TEST