MAX3185 Maxim, MAX3185 Datasheet
MAX3185
Manufacturer Part Number
MAX3185
Description
15kV ESD-Protected / EMC-Compliant / 230kbps RS-232 Serial Port for Motherboards/Desktop PCs
Manufacturer
Maxim
Datasheet
1.MAX3185.pdf
(8 pages)
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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
for I
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
19-1076; Rev 0; 9/96
TTL/CMOS
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
RS-232 Serial Port for Motherboards/Desktop PCs
__________Typical Operating Circuit
_______________General Description
LOGIC
CC
±15kV ESD-Protected, EMC-Compliant, 230kbps
I/O
.
Desktop PC
Motherboards
Instruments
Equipment Meeting IEC1000-4-2
MAX3186
T1
T2
T3
T4
T5
R1
R2
R3
________________________________________________________________ Maxim Integrated Products
INTERCONNECTING
DD
RS-232
CABLE
and I
SS
, and less than 1mA
MAX3185
R2
R1
R3
R4
R5
T1
T2
T3
TTL/CMOS
LOGIC
I/O
____________________________Features
______________Ordering Information
MAX3185CWP
MAX3185CAP
MAX3185EWP
MAX3185EAP
__________________Pin Configuration
Enhanced ESD Protection:
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
TOP VIEW
±15kV—Human Body Model
±8kV—IEC1000-4-2, Contact Discharge
±15kV—IEC1000-4-2, Air-Gap Discharge
PART
T1OUT
T2OUT
T3OUT
R1IN
R2IN
R3IN
R4IN
R5IN
V
V
DD
SS
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
10
0°C to +70°C
0°C to +70°C
1
2
3
4
5
6
7
8
9
SO/SSOP
MAX3185
17
14
13
20
19
18
16
15
12
11
20 SO
20 SSOP
20 SO
20 SSOP
PIN-PACKAGE
T1IN
T2IN
V
R1OUT
R2OUT
R3OUT
R4OUT
T3IN
R5OUT
GND
CC
1
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