
M
±15kV ESD-Protected, 12V Dual RS-232 Serial Port
with Low-Power Standby for Motherboards/Desktops
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V
DD
.........................................................................-0.3V to +15V
V
STBY
....................................................................... -0.3V to +7V
V-........................................................................... +0.3V to -15V
Input Voltages
T_IN......................................................................-0.3V to +7V
R_IN.................................................................................±30V
Output Voltages
T_OUT..............................................................................±15V
R_OUT.................................................-0.3V to (V
STBY
+ 0.3V)
ELECTRICAL CHARACTERISTICS
(V
DD
= +10.8V to +13.2V, V
STBY
= +3V to +5.5V, C1 = C2 = 0.1μF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C, V
DD
= +12V, V
STBY
= +3.3V.)
CONDITIONS
SYMBOL
PARAMETER
DC CHARACTERISTICS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Short-Circuit Duration
T_OUT (one at a time)............................................Continuous
R_OUT (one at a time)............................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
TSSOP (derate 11.8mW/°C above +70°C) ..................941mW
Operating Temperature Ranges
MAX3209EC_ _...................................................0°C to +70°C
MAX3209EE_ _ ................................................-40°C to +85°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10sec) ............................+300°C
T
A
= +25°C
V
STBY
= 3.3V
T
A
= +25°C
V
DD
= V
STBY
= 0, V
OUT
= ±2V
V
T_OUT
= 0
Transmitter input at GND
T_IN
All transmitter outputs loaded with 3k
to GND
T_IN
V
DD
= +12V, no load, all transmitter inputs at
V
STBY
, all receiver inputs at V
STBY
or uncon-
nected
V
DD
= 0, V
STBY
= +3.3V, no load, all transmit-
ter inputs at V
STBY
, all receiver inputs at V
STBY
or unconnected
R_OUT
V
V
2.4
0.2
3
RS-232 Input Threshold High
RS-232 Input Hysteresis
RS-232 Input Resistance
V
0.4
RS-232 Input Threshold Low
V
-25
25
Receiver Input Voltage Range
300
Transmitter Output Resistance
RS-232 RECEIVER INPUTS
mA
±10
±60
RS-232 Output Short-Circuit
Current
V
Output Voltage Swing
±5.0
V
V
STBY
- 0.3
V
STBY
- 0.6
V
OHR
Output Voltage High
10.8
3
13.2
5.5
V
DD
STBY
μA
25
Input Pull-Up Current
RECEIVER LOGIC OUTPUTS
V
2
V
IHT
Input Logic Threshold High
V
0.8
V
ILT
Input Logic Threshold Low
0.5
1
I
DD
mA
Supply Current
UNITS
MIN
TYP
MAX
1
7
k
5
T
A
= +25°C
Operating Voltage Range
V
50
100
I
STBY
μA
R_OUT; I
SINK
= 1.6mA
V
0.4
V
OLR
Output Voltage Low
V
DD
= 0, V
STBY
= 5V
μA
0.05
±5
Receiver Output Leakage
Current
I
SOURCE
= 40μA
I
SOURCE
= 1mA
RS-232 TRANSMITTER OUTPUTS
TRANSMITTER LOGIC INPUTS