MAX3209ECUU-T Maxim Integrated, MAX3209ECUU-T Datasheet - Page 6

• Manufacturer Part Number: MAX3209ECUU-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3209Er

Specifications of MAX3209ECUU-T

• Data Rate: 460 Kbps
• Operating Supply Voltage: 3.3 V, 5 V, 12 V
• Supply Current: 0.5 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Function: Transceiver
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Number Of Drivers: 6
• Number Of I/os: 6/10
• Number Of Receivers: 10
• Propagation Delay Time Ns: 0.4 us, 1 us
• Shutdown: No

inputs and outputs) require this protection during man-
ufacturing. Therefore, the Machine Model is less rele-
vant to the I/O ports than are the Human Body Model
and IEC 1000-4-2.
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
±15kV ESD-Protected, 12V, Dual RS-232 Serial Port
with Low-Power Standby for Motherboards/Desktops
6
Figure 1. Slew-Rate Test Circuit and Timing Diagram
DRIVER
V
INPUT
GENERATOR
OUT
_______________________________________________________________________________________
0
SIGNAL
3.0V
±4kV Electrical Fast Transient/Burst Testing
t
1.5V
PHL
t
t
F2
F1
-3.0V
-3.3V
3.3V
3.0V
t
PLH
R
t
t
L
R2
R1
(IEC 1000-4-4)
C
L
V
V
0
OH
OL
increase the magnitude of each discharge. All cabling
was left unterminated to simulate worst case reflections.
The MAX3209E was set up as specified in IEC 1000-4-4
and the Typical Operating Circuit of this data sheet.
The amplitude, pulse rise time, pulse duration, pulse
repetition period, burst duration, and burst period
(Figure 5) of the burst generator were all verified with a
Figure 2a. Human Body ESD Test Model
Figure 2b. Human Body Model Current Waveform
Figure 3a. IEC 1000-4-2 ESD Test Model
AMPERES
VOLTAGE
VOLTAGE
SOURCE
SOURCE
HIGH-
HIGH-
DC
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT
CHARGE-CURRENT
LIMIT RESISTOR
LIMIT RESISTOR
0
50MΩ to 100MΩ
0
1MΩ
R
t
R
RL
C
150pF
C
100pF
C s
C s
STORAGE
CAPACITOR
STORAGE
CAPACITOR
CURRENT WAVEFORM
TIME
RESISTANCE
1500Ω
DISCHARGE
RESISTANCE
DISCHARGE
330Ω
R
R
D
D
t
DL
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
DEVICE
UNDER
TEST
DEVICE
UNDER
TEST