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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX3185 Datasheet

RS-232 Serial Port

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19-1076; Rev 0; 9/96
±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
_______________General Description
The MAX3185 is a complete DTE RS-232 serial port
designed to meet the stringent ESD requirements of the
European community. All transmitter outputs and receiv-
er inputs are protected to ±15kV using IEC 1000-4-2
Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact
Discharge, and ±15kV using the Human Body Model.
The MAX3185 has three RS-232 transmitters, five RS-
232 receivers, and no charge pump, optimizing it for
operation in desktop PC and motherboard applications.
It is guaranteed to run at data rates up to 230kbps, pro-
viding compatibility with popular software for communi-
cating with personal computers. Power-supply current
is less than 300µA for IDD and ISS, and less than 1mA
for ICC.
The MAX3185 is pin and functionally compatible with
the industry-standard 75185, so existing designs can
instantly become EMC compliant. The MAX3185 is
available in an SO package and in the tiny SSOP that
further reduces board space.
________________________Applications
Desktop PC
Motherboards
Instruments
Equipment Meeting IEC1000-4-2
____________________________Features
o Enhanced ESD Protection:
±15kV—Human Body Model
±8kV—IEC1000-4-2, Contact Discharge
±15kV—IEC1000-4-2, Air-Gap Discharge
o Latchup Free During an ESD Event
o 20-Pin SSOP and SO Packages
o Guaranteed 230kbps Data Rate
o Flow-Through Pinout
o Pin Compatible with SN75C185
o Complete DTE Serial Port
______________Ordering Information
PART
MAX3185CWP
MAX3185CAP
MAX3185EWP
MAX3185EAP
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 SO
20 SSOP
20 SO
20 SSOP
__________Typical Operating Circuit __________________Pin Configuration
TTL/CMOS
LOGIC
I/O
MAX3186
T1
MAX3185
R1
T2 R2
RS-232
T3 R3
INTERCONNECTING
T4 R4
CABLE
T5 R5
R1 T1
R2 T2
R3 T3
TTL/CMOS
LOGIC
I/O
TOP VIEW
VDD 1
R1IN 2
R2IN 3
R3IN 4
T1OUT 5
T2OUT 6
R4IN 7
T3OUT 8
R5IN 9
VSS 10
MAX3185
20 VCC
19 R1OUT
18 R2OUT
17 R3OUT
16 T1IN
15 T2IN
14 R4OUT
13 T3IN
12 R5OUT
11 GND
SO/SSOP
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX3185 Datasheet

RS-232 Serial Port

No Preview Available !

±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
ABSOLUTE MAXIMUM RATINGS
VCC ...........................................................................-0.3V to +7V
VDD .........................................................................-0.3V to +14V
VSS......................................................................... +0.3V to -14V
Input Voltages
TIN ........................................................................-0.3V to +6V
RIN ...................................................................................±30V
Output Voltages
TOUT.................................................................................±15V
ROUT.......................................................-0.3V to (VCC + 0.3V)
Short-Circuit Duration
TOUT (one at a time)...............................................Continuous
ROUT (one at a time) ..............................................Continuous
Continuous Power Dissipation (TA = +70°C)
Wide SO (derate 10.00mW/°C above +70°C)..............800mW
SSOP (derate 8.00mW/°C above +70°C) ....................640mW
Operating Temperature Ranges
MAX3185C_ P .....................................................0°C to +70°C
MAX3185E_ P ..................................................-40°C to +85°C
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VCC = +4.5V to +5.5V, VDD = +10.8V to +13.2V, VSS = -10.8V to -13.2V, TA = TMIN to TMAX, unless otherwise noted. Typical values
are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC CHARACTERISTICS
VCC 4.5 5.5
Operating Voltage Range
VDD
10.8
13.2
V
VSS
-13.2
-10.8
ICC No load
380 1500
Supply Current
IDD No load
185 500 µA
ISS No load
185 500
LOGIC
Input Logic Threshold Low
VILT
TIN
0.8 V
Input Logic Threshold High
VIHT
TIN
2.0 V
Input Leakage Current
0.01
1
µA
Output Voltage Low
VOLR ROUT; ISINK = 3.2mA
0.4 V
Output Voltage High
VOHR ROUT; ISOURCE = 1mA
VCC - 0.6
V
TRANSMITTER OUTPUTS
Output Voltage Swing
Transmitter Output Resistance
VDD = 7.0V, VSS = -7.0V, RL = 3k
VDD = 12V, VSS = -12V, RL = 3k
VCC = VDD = VSS = 0V, VT_OUT = ±2V
±5.0
±9.5
300
V
RS-232 Output Short-Circuit
Current
±35 ±60 mA
RECEIVER INPUTS
Receiver Input Voltage
Operating Range
-25 25 V
RS-232 Input Threshold Low
RS-232 Input Threshold High
RS-232 Input Hysteresis
RS-232 Input Resistance
Receiver Output Short-Circuit
Current
0.75
0.65
35
2.4
7
V
V
V
k
±10 mA
2 _______________________________________________________________________________________


Part Number MAX3185
Description RS-232 Serial Port
Maker Maxim
PDF Download

MAX3185 Datasheet PDF






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