MAX3185CAP+-MAX3185CAP+T-MAX3185CWP+-MAX3185EWP+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX3185EWP+ ,±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Motherboards/Desktop PCsELECTRICAL CHARACTERISTICS(V = +4.5V to +5.5V, V = +10.8V to +13.2V, V = -10.8V to -13.2V, T = T to ..
MAX3186CAP ,【15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for ModemsApplications______________Ordering InformationModemsPART TEMP. RANGE PIN-PACKAGEISDN ModemsMAX3186C ..
MAX3186CAP+ ,±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for ModemsELECTRICAL CHARACTERISTICS(V = +4.5V to +5.5V, V = +10.8V to +13.2V, V = -10.8V to -13.2V, T = T to ..
MAX3186CAP+T ,±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for ModemsApplications______________Ordering InformationModemsPART TEMP. RANGE PIN-PACKAGEISDN ModemsMAX3186C ..
MAX3186CWP ,【15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for ModemsELECTRICAL CHARACTERISTICS(V = +4.5V to +5.5V, V = +10.8V to +13.2V, V = -10.8V to -13.2V, T = T to ..
MAX3186EAP ,【15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for ModemsFeaturesThe MAX3186 is a complete DCE RS-232 serial port' Enhanced ESD Protection:designed to meet ..
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MAX640CSA ,5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters
MAX640CSA ,5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters
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MAX3185CAP+-MAX3185CAP+T-MAX3185CWP+-MAX3185EWP+
±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 IDDand 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
____________________________FeaturesEnhanced ESD Protection:
±15kV—Human Body Model
±8kV—IEC1000-4-2, Contact Discharge
±15kV—IEC1000-4-2, Air-Gap DischargeLatchup Free During an ESD Event20-Pin SSOP and SO PackagesGuaranteed 230kbps Data RateFlow-Through PinoutPin Compatible with SN75C185Complete DTE Serial Port
±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
________________________________________________________________Maxim Integrated Products1
VCC
R1OUT
R2OUT
R3OUTR3IN
R2IN
R1IN
VDD
TOP VIEW
T1IN
T2IN
R4OUT
T3INT3OUT
R4IN
T2OUT
T1OUT
R5OUT
GNDVSS
R5IN
SO/SSOP
MAX3185
__________________Pin Configuration
MAX3186MAX3185
RS-232
INTERCONNECTING
CABLE
TTL/CMOS
LOGIC
I/O
TTL/CMOS
LOGIC
I/O
__________Typical Operating Circuit
19-1076; Rev 0; 9/96
PART
MAX3185CWP
MAX3185CAP0°C to +70°C
0°C to +70°C
TEMP. RANGEPIN-PACKAGE
20 SO
20 SSOP
______________Ordering Information
& the latest literature: http://,
MAX3185EWP-40°C to +85°C20 SO
MAX3185EAP-40°C to +85°C20 SSOP
5kV ESD-Protected, EMC-Compliant, 230kbpsRS-232 Serial Port for Motherboards/Desktop PCs_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= +4.5V to +5.5V, VDD= +10.8V to +13.2V, VSS= -10.8V to -13.2V, TA= TMINto TMAX, unless otherwise noted. Typical values
are at TA= +25°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.
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
VCC= VDD= VSS= 0V, VT_OUT= ±2V
VDD= 12V, VSS= -12V, RL= 3kΩ
TIN
VDD= 7.0V, VSS= -7.0V, RL= 3kΩ
TIN
No load
No load
ROUT; ISOURCE= 1mA
No load
ROUT; ISINK= 3.2mA
CONDITIONS2.4RS-232 Input Threshold High0.75RS-232 Input Threshold Low-2525Receiver Input Voltage
Operating Range±35±60RS-232 Output Short-Circuit
Current300Transmitter Output Resistance±9.5Output Voltage Swing±5.0VCC- 0.6VOHROutput Voltage High0.4VOLROutput Voltage Low
10.813.2VDD
4.55.5VCC0.011Input Leakage Current2.0VIHTInput Logic Threshold High0.8VILTInput Logic Threshold Low
-13.2-10.8VSS
Operating Voltage Range
3801500ICC
185500IDDμA
185500ISS
Supply Current
UNITSMINTYPMAXSYMBOLPARAMETER0.65RS-232 Input Hysteresis357RS-232 Input Resistance±10Receiver Output Short-Circuit
Current
RECEIVER INPUTS
TRANSMITTER OUTPUTS
LOGIC
DC CHARACTERISTICS
±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +4.5V to +5.5V, VDD= +10.8V to +13.2V, VSS= -10.8V to -13.2V, TA= TMINto TMAX, unless otherwise noted. Typical values
are at TA= +25°C.)
VDD= 12V, VSS= -12V, RL= 3kΩ,= 1000pF, TA= +25°C
VDD= 12V, VSS= -12V, = 3kΩto 7kΩ,
measured from +3V to -3V
or -3V to +3V, Figure 3,= +25°C
IEC1000-4-2 (Contact Discharge)
Human Body Model
tPHLT30
Transmitter Output
Propagation Delay, High to Low
V/μsTransition Output Slew Rate
IEC1000-4-2 (Air-Gap Discharge)
VCC= 5V, CL= 50pF, TA= +25°C
VCC= 5V, CL= 50pF, TA= +25°C= 50pF to
1000pF
CONDITIONS
tPHLR= 50pF to
2500pF
VDD= 12V, VSS= -12V, RL= 3kΩ,= 1000pF, TA= +25°C
Receiver Output
Propagation Delay, High to Low
tPLHR
tPLHT
Receiver Output
Propagation Delay, Low to HighTransmitter Output
Propagation Delay, Low to High
T3OUT = -5mA, T1OUT = T2OUT = +5mA
±7.5VMouse Driveability
VCC= 5V, CL= 50pF, TA= +25°C0.4tSKRμsReceiver Propagation Delay
Skew, |tPLHR- tPHLR|
VCC= 5V, VDD= 12V,
VSS= -12V, = 3kΩto 7kΩ,= +25°C230
kbpsDRGuaranteed Data Rate
±15
VDD= 12V, VSS= -12V, RL= 3kΩ,= 1000pF, TA= +25°C0.4tSKTμsTransmitter Propagation Delay
Skew, |tPLHT- tPHLT|= 50pF to
1000pF30CL= 150pF to
2500pF
±15
ESD Protection
UNITSMINTYPMAXSYMBOLPARAMETER
ESD CHARACTERISTICS
TIMING CHARACTERISTICS
5kV ESD-Protected, EMC-Compliant, 230kbpsRS-232 Serial Port for Motherboards/Desktop PCs_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(VCC= +5.0V, VDD= +12.0V, VSS= -12.0V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
AX3185-TOC01
SUPPLY VOLTAGE (V)
(m
IDD, 240kbps
IDD, 120kbps
IDD, 20kbps1 TRANSMITTER AT DATA RATE
2 TRANSMITTERS AT DATA RATE / 16
3kW + 2500pF LOAD
ICC
ISS, 20kbps
ISS, 120kbps
ISS, 240kbps
SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3185-TOC02
LOAD CAPACITANCE (pF)
(m
IDD, 240kbps
IDD, 120kbps
IDD, 20kbps
ICC
ISS,
20kbps
ISS, 120kbps
ISS, 240kbps
1 TRANSMITTER AT DATA RATE
2 TRANSMITTERS AT DATA RATE / 16
3kW + CL LOAD
SLEW RATE
vs. LOAD CAPACITANCE
MAX3185-TOC03
LOAD CAPACITANCE (pF)
E (V
1 TRANSMITTER 240kbps
2 TRANSMITTERS 15kbps
3kW + CL LOAD
RISE
FALL
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3185-TOC04
LOAD CAPACITANCE (pF)
ITT
(V
240kbps
120kbps
120kbps
240kbps
1 TRANSMITTER AT DATA RATE
2 TRANSMITTERS AT DATA RATE / 16
3kW + CL LOAD
MAX3185 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CURRENT PER TRANSMITTER
MAX3185-TOC05
LOAD CURRENT PER TRANSMITTER (mA)
ITT
(V
VOUT+
VOUT-
VCC
VOUT+
VOUT-
SLEW RATE
vs. TEMPERATURE
MAX3185-TOC06
TEMPERATURE (°C)
E (V1051254565525-35-15-55
RISE, 500pF
FALL, 500pF
RISE, 2000pF
FALL, 2000pF
_______________Detailed Description
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. The MAX3185 driver outputs and receiver
inputs have extra protection against static electricity
found in normal operation. Maxim’s engineers devel-
oped state-of-the-art structures to protect these pins
against ESD of ±15kV, without damage. After an ESD
event, the MAX3185 continues working without latchup.
ESD protection can be tested in several ways. The
transmitter outputs and the receiver inputs are charac-
terized for protection to the following:±15kV using the Human Body Model±8kV using the Contact-Discharge Method specified
in IEC1000-4-2 (formerly IEC801-2)±15kV using the Air-Gap Method specified in
IEC1000-4-2 (formerly IEC801-2)
ESD Test Conditions
ESD performance depends on a number of conditions.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.
±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
_______________________________________________________________________________________5
______________________________________________________________Pin Description
PINNAMEFUNCTIONVDDSupply-Voltage Input, +10.8V to +13.2V
12, 14, 17, 18, 19R5OUT–R1OUTReceiver Outputs, swing between GND and VCC
16, 15, 13T3IN, T2IN, T1INTransmitter InputsVSSSupply-Voltage Input, -10.8V to -13.2VGNDGround. Connect system to ground.
2, 3, 4, 7, 9R1IN–R5INReceiver Inputs
5, 6, 8T1OUT, T2OUT, T3OUTTransmitter Outputs, swing between VDDand VSSVCCSupply-Voltage Input, +4.5V to +5.5V
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
150pF
RC 50M to 100MRD 330W
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
tr = 0.7ns to 1ns30ns
60ns
100%
90%
10%
IPEA
Figure 1a. IEC1000-4-2 ESD Test Model
Figure 1b. IEC1000-4-2 ESD-Generator Current Waveform
Human Body Model
Figure 2a shows the Human Body Model, and Figure
2b 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 device through a
1.5kΩresistor.
IEC1000-4-2
The IEC1000-4-2 standard covers ESD testing and per-
formance of finished equipment; it does not specifically
refer to integrated circuits. The MAX3185 helps you
design equipment that meets Level 4 (the highest level)
of IEC1000-4-2, without additional ESD-protection com-
ponents.
The main difference between tests done using the
Human Body Model and IEC1000-4-2 is higher peak
current in IEC1000-4-2. Because series resistance is
lower in the IEC1000-4-2 ESD test model (Figure 1a),
the ESD withstand voltage measured to this standard is
generally lower than that measured using the Human
Body Model. Figure 1b shows the current waveform for
the ±8kV IEC1000-4-2 Level 4 ESD Contact-Discharge
test.
The Air-Gap test involves approaching the device with a
charge probe. The Contact-Discharge method connects
the probe to the device before the probe is energized.
Machine Model
The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. It mimics
the stress caused by handling during manufacturing
and assembly. Of course, all pins (not just RS-232
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 IEC1000-4-2.
__________Applications Information
Use proper layout to ensure other devices on your
board are not damaged in an ESD strike. Currents as
high as 60A can instantaneously pass into ground, so
be sure to minimize the ground-lead return path to the
power supply. A separate return path to the power sup-
ply is recommend. Trace widths should be greater than
40 mils. Bypass VCC, VDD, and VSSwith 0.1μF capaci-
tors as close to the part as possible to ensure maxi-
mum ESD protection.
Tie any unused transmitter inputs to GND or VCC. No
external protection diodes are needed because the
MAX3185 is not sensitive to power-supply sequencing.5kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs_______________________________________________________________________________________
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC 1MRD 1500W
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
IP 100%
90%
36.8%
tRLTIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
10%
AMPERES
Figure 2a. Human Body ESD Test ModelFigure 2b. Human Body Model Current Waveform

Partno	Mfg	Dc	Qty	Available	Descript
MAX3185CAP+ \|MAX3185CAP	MAX	N/a	115	avai	±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Motherboards/Desktop PCs
MAX3185CAP+T	MAXIM	N/a	517	avai	±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Motherboards/Desktop PCs
MAX3185CWP+ \|MAX3185CWP	MAXIM	N/a	20	avai	±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Motherboards/Desktop PCs
MAX3185EWP+	N/A	N/a	2500	avai	±15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Motherboards/Desktop PCs