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MAX3185CAP

P1-P3P4-P6P7-P8
_______________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 I
DD
and I
SS
, and less than 1mA
for I
CC
.
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
♦ Enhanced ESD Protection:
±15kV—Human Body Model
±8kV—IEC1000-4-2, Contact Discharge
±15kV—IEC1000-4-2, Air-Gap Discharge
♦ Latchup Free During an ESD Event
♦ 20-Pin SSOP and SO Packages
♦ Guaranteed 230kbps Data Rate
♦ Flow-Through Pinout
♦ Pin Compatible with SN75C185
♦ Complete DTE Serial Port
MAX3185
±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
________________________________________________________________
Maxim Integrated Products
1
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
V
CC
R1OUT
R2OUT
R3OUT
R3IN
R2IN
R1IN
V
DD
TOP VIEW
T1IN
T2IN
R4OUT
T3IN
T3OUT
R4IN
T2OUT
T1OUT
12
11
9
10
R5OUT
GND
V
SS
R5IN
SO/SSOP
MAX3185
__________________Pin Configuration
MAX3186 MAX3185
RS-232
INTERCONNECTING
CABLE
T1
T2
T3
T4
T5
T1
T2
T3
R1
R2
R3
R1
R2
R3
R4
R5
TTL/CMOS
LOGIC
I/O
TTL/CMOS
LOGIC
I/O
__________Typical Operating Circuit
19-1076; Rev 0; 9/96
PART
MAX3185CWP
MAX3185CAP 0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
20 SO
20 SSOP
______________Ordering Information
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX3185EWP -40°C to +85°C 20 SO
MAX3185EAP -40°C to +85°C 20 SSOP
MAX3185
±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +4.5V to +5.5V, V
DD
= +10.8V to +13.2V, V
SS
= -10.8V to -13.2V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +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.
V
CC
...........................................................................-0.3V to +7V
V
DD
.........................................................................-0.3V to +14V
V
SS
......................................................................... +0.3V to -14V
Input Voltages
T
IN
........................................................................-0.3V to +6V
R
IN
...................................................................................±30V
Output Voltages
T
OUT
.................................................................................±15V
R
OUT
.......................................................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
T
OUT
(one at a time)...............................................Continuous
R
OUT
(one at a time) ..............................................Continuous
Continuous Power Dissipation (T
A
= +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
V
CC
= V
DD
= V
SS
= 0V, V
T_OUT
= ±2V
V
DD
= 12V, V
SS
= -12V, R
L
= 3kΩ
T
IN
V
DD
= 7.0V, V
SS
= -7.0V, R
L
= 3kΩ
T
IN
No load
No load
R
OUT
; I
SOURCE
= 1mA
No load
R
OUT
; I
SINK
= 3.2mA
CONDITIONS
V2.4RS-232 Input Threshold High
V0.75RS-232 Input Threshold Low
V-25 25
Receiver Input Voltage
Operating Range
mA±35 ±60
RS-232 Output Short-Circuit
Current
Ω300Transmitter Output Resistance
V
±9.5
Output Voltage Swing
±5.0
VV
CC
- 0.6V
OHR
Output Voltage High
V0.4V
OLR
Output Voltage Low
10.8 13.2V
DD
4.5 5.5V
CC
µA0.01 1Input Leakage Current
V2.0V
IHT
Input Logic Threshold High
V0.8V
ILT
Input Logic Threshold Low
V
-13.2 -10.8V
SS
Operating Voltage Range
380 1500I
CC
185 500I
DD
µA
185 500I
SS
Supply Current
UNITSMIN TYP MAXSYMBOLPARAMETER
V0.65RS-232 Input Hysteresis
kΩ357RS-232 Input Resistance
mA±10
Receiver Output Short-Circuit
Current
RECEIVER INPUTS
TRANSMITTER OUTPUTS
LOGIC
DC CHARACTERISTICS
MAX3185
±15kV ESD-Protected, EMC-Compliant, 230kbps
RS-232 Serial Port for Motherboards/Desktop PCs
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +4.5V to +5.5V, V
DD
= +10.8V to +13.2V, V
SS
= -10.8V to -13.2V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.)
V
DD
= 12V, V
SS
= -12V, R
L
= 3kΩ,
C
L
= 1000pF, T
A
= +25°C
V
DD
= 12V, V
SS
= -12V,
R
L
= 3kΩ to 7kΩ,
measured from +3V to -3V
or -3V to +3V, Figure 3,
T
A
= +25°C
IEC1000-4-2 (Contact Discharge)
4
Human Body Model
t
PHLT
830
µs
SR
Transmitter Output
Propagation Delay, High to Low
V/µsTransition Output Slew Rate
IEC1000-4-2 (Air-Gap Discharge)
V
CC
= 5V, C
L
= 50pF, T
A
= +25°C
V
CC
= 5V, C
L
= 50pF, T
A
= +25°C
C
L
= 50pF to
1000pF
4.0
4.0
CONDITIONS
t
PHLR
C
L
= 50pF to
2500pF
µs
V
DD
= 12V, V
SS
= -12V, R
L
= 3kΩ,
C
L
= 1000pF, T
A
= +25°C
Receiver Output
Propagation Delay, High to Low
t
PLHR
4
µs
t
PLHT
Receiver Output
Propagation Delay, Low to High
µs
Transmitter Output
Propagation Delay, Low to High
T3OUT = -5mA, T1OUT = T2OUT = +5mA
120
±7.5 VMouse Driveability
V
CC
= 5V, C
L
= 50pF, T
A
= +25°C 0.4t
SKR
µs
Receiver Propagation Delay
Skew,
|
t
PLHR
- t
PHLR
|
V
CC
= 5V, V
DD
= 12V,
V
SS
= -12V,
R
L
= 3kΩ to 7kΩ,
T
A
= +25°C
230
kbpsDRGuaranteed Data Rate
±8
±15
V
DD
= 12V, V
SS
= -12V, R
L
= 3kΩ,
C
L
= 1000pF, T
A
= +25°C
0.4t
SKT
µs
Transmitter Propagation Delay
Skew,
|
t
PLHT
- t
PHLT
|
C
L
= 50pF to
1000pF
430
C
L
= 150pF to
2500pF
kV
±15
ESD Protection
UNITSMIN TYP MAXSYMBOLPARAMETER
ESD CHARACTERISTICS
TIMING CHARACTERISTICS
P1-P3P4-P6P7-P8

MAX3185CAP

Mfr. #:
Buy MAX3185CAP
Manufacturer:
Maxim Integrated
Description:
RS-232 Interface IC 15kV ESD-Protected, EMC Compliant, 230kbps RS-232 Serial Port for Motherboards/Desktop PCs
Lifecycle:
New from this manufacturer.
Delivery:
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