MAX3221ECTE+ Maxim Integrated Products, MAX3221ECTE+ Datasheet - Page 10

• Manufacturer Part Number: MAX3221ECTE+
• Description: IC TXRX RS232 250KBPS SD 16-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX3221ECTE+

• Number Of Drivers/receivers: 1/1
• Protocol: RS232
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-TQFN Exposed Pad
• Package: 16TQFN EP
• Data Transmission Topology: Point-to-Point
• Interface Standards: EIA/TIA-232|RS-232|V.24|V.28
• Data Rate: 0.25(Min) Mbps
• Function: Line Transmitter/Receiver
• Number Of Transmitters: 1
• Transmitter Signal Type: Single-Ended
• Transmitter Communication Type: RS-232
• Driving Mode: 3-State
• Typical Single Supply Voltage: 3.3|5 V
• Propagation Delay Time Ns: 0.15 us
• Operating Supply Voltage: 3 V to 5.5 V
• Supply Current: 0.3 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ESD protection can be tested in various ways; the trans-
mitter 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 IEC1000-4-2’s Air-Gap Method
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 interest,
which is then discharged into the test device through a
1.5kΩ resistor.
The IEC1000-4-2 standard covers ESD testing and per-
formance of finished equipment; it does not specifically
refer to integrated circuits. The MAX3221E/ MAX3223E/
MAX3243E help you design equipment that meets
±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
10
Figure 4. AutoShutdown with Initial Turn-On to Wake Up a
Mouse or Another System
Figure 3c. MAX32_ _E AutoShutdown Logic
in IEC1000-4-2
______________________________________________________________________________________
INVALID IS AN INTERNALLY GENERATED SIGNAL
THAT IS USED BY THE AUTOSHUTDOWN LOGIC
AND APPEARS AS AN OUTPUT OF THE DEVICE.
POWER DOWN IS ONLY AN INTERNAL SIGNAL.
IT CONTROLS THE OPERATIONAL STATUS OF
THE TRANSMITTERS AND THE POWER SUPPLIES.
MANAGEMENT
POWER-
UNIT
FORCEOFF
FORCEON
INVALID
MASTER SHDN LINE
FORCEOFF
MAX3221E
MAX3223E
MAX3243E
0.1μF
E E S S D D T T e e s s t t C C o o n n d d i i t t i i o o n n s s
H H u u m m a a n n B B o o d d y y M M o o d d e e l l
FORCEON
1MΩ
POWER DOWN
IEC1000-4-2
Table 2. INVALID Truth Table
Figure 5. AutoShutdown Trip Levels
RS-232 SIGNAL PRESENT
AT ANY RECEIVER INPUT
RECEIVER
VOLTAGE
OUTPUT
INVALID
INPUT
b)
a)
(V)
(V)
V
V
+2.7V
+0.3V
-0.3V
-2.7V
CC
V+
CC
V-
0
0
0
Yes
No
AUTOSHUTDOWN, TRANSMITTERS DISABLED,
TRANSMITTERS ENABLED, INVALID HIGH
TRANSMITTERS ENABLED, INVALID HIGH
1μA SUPPLY CURRENT, INVALID LOW
t
INVL
INDETERMINATE
INDETERMINATE
INVALID OUTPUT
High
Low
t
INVH
INVALID
REGION
t
WU