MAX3227EETE-T Maxim Integrated, MAX3227EETE-T Datasheet - Page 13
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MAX3227EETE-T
Manufacturer Part Number
MAX3227EETE-T
Description
RS-232 Interface IC
Manufacturer
Maxim Integrated
Series
MAX3224E, MAX3225E, MAX3226E, MAX3227E, MAX3244E, MAX3245Er
Datasheet
1.MAX3245EEWI.pdf
(21 pages)
Specifications of MAX3227EETE-T
Data Rate
1 Mbps
Operating Supply Voltage
3 V to 5.5 V
Supply Current
1 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Function
Transceiver
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Drivers
1
Number Of I/os
4
Number Of Receivers
1
Propagation Delay Time Ns
0.15 us
Shutdown
Yes
Maxim Integrated
these pins against ESD of ±15kV without damage. The
ESD structures withstand high ESD in all states: normal
operation, shutdown, and powered down. After an ESD
event, Maxim’s E versions keep working without
latchup, whereas competing RS-232 products can
latch and must be powered down to remove latchup.
ESD protection can be tested in various ways; the
transmitter outputs and receiver inputs of this product
family are characterized for protection to the following
limits:
1) ±15kV using the Human Body Model
2) ±8kV using the Contact-Discharge Method specified
3) ±15kV using IEC 1000-4-2’s Air-Gap Method.
Figure 6a. Human Body ESD Test Model
Figure 6b. Human Body Current Waveform
±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V,
AMPERES
MAX3226E/MAX3227E/MAX3244E/MAX3245E
in IEC 1000-4-2
VOLTAGE
SOURCE
HIGH-
RS-232 Transceivers with AutoShutdown Plus
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT
0
LIMIT RESISTOR
0
R
t
C
RL
1MΩ
100pF
C s
STORAGE
CAPACITOR
CURRENT WAVEFORM
R
TIME
RESISTANCE
D
DISCHARGE
1500Ω
t
DL
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 6a shows the Human Body Model and Figure 6b
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.
Figure 7a. IEC 1000-4-2 ESD Test Model
Figure 7b. IEC 1000-4-2 ESD Generator Current Waveform
t r = 0.7ns to 1ns
VOLTAGE
SOURCE
HIGH-
DC
CHARGE CURRENT
100%
R
LIMIT RESISTOR
90%
10%
C
50MΩ to 100MΩ
I
150pF
C s
30ns
STORAGE
CAPACITOR
R
RESISTANCE
DISCHARGE
D
330Ω
60ns
ESD Test Conditions
Human Body Model
DEVICE
UNDER
TEST
t
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