19-1471; Rev 1; 9/99
鹵15kV ESD-Protected, 12V, Dual RS-232 Serial Port
with Low-Power Standby for Motherboards/Desktops
General Description
The MAX3209E is a complete, dual DTE RS-232 serial
port (6 transmitters, 10 receivers) for motherboards and
desktop PCs that ensures compliance with the stringent
ESD requirements of the European Community. The
device minimizes board space and power consumption
by eliminating the need for a negative power supply; it
integrates two serial ports and a charge pump into a sin-
gle 38-pin TSSOP package.
The MAX3209E features a 50碌A(chǔ) low-power standby
mode for compliance with system power-management
requirements. During standby, while the device oper-
ates from the single +3V to +5.5V logic supply, one
receiver on each port remains active, allowing automatic
system wake-up when peripheral communications
resume.
All transmitter outputs and receiver inputs are protected
to 鹵15kV using IEC 1000-4-2 Air-Gap Discharge, 鹵8kV
using IEC 1000-4-2 Contact Discharge, and 鹵15kV
using the Human Body Model, making the device ideal
for use in harsh environments or mission-critical equip-
ment. As a result of its robust charge-pump structure,
the MAX3209E guarantees mouse driveability and true
RS-232 operation at data rates up to 460kbps, ensuring
compatibility with PC-to-PC communication software
(such as LapLink
鈩?/div>
).
Features
o
Two Complete Serial Ports in a Single 38-Pin
TSSOP Package
o
Requires Only +12V Supply and Logic
Supply (+3V to +5.5V)
o
No Negative Supply Required
o
One Receiver Active per Port in Standby
for System Wake-Up
o
460kbps Data Rate; LapLink Compatible
o
Enhanced ESD Protection
鹵15kV鈥擧uman Body Model
鹵8kV鈥擨EC 1000-4-2, Contact Discharge
鹵15kV鈥擨EC 1000-4-2, Air-Gap Discharge
o
Low 50碌A(chǔ) Standby Current
o
Operates with Either +3V or +5V Logic
o
Guaranteed Mouse Driveability
o
Small 0.1碌F Capacitors
o
Flow-Through Pinout
MAX3209E
Pin Configuration
TOP VIEW
R5OUT
R4OUT
R3OUT
1
2
3
4
5
6
7
8
9
38 R5IN
37 R4IN
36 R3IN
35 R2IN
34 R1IN
Ordering Information
PART
MAX3209ECUU
MAX3209EEUU
TEMP. RANGE
0擄C to +70擄C
-40擄C to +85擄C
PIN-PACKAGE
38 TSSOP
38 TSSOP
R2OUT
R1OUT
T3IN
T2IN
T1IN
MAX3209E
33 T3OUT
32 T2OUT
31 T1OUT
30 V-
29 C1-
28 GND
27 T4OUT
26 T5OUT
25 T6OUT
24 R6IN
23 R7IN
22 R8IN
21 R9IN
20 R10IN
________________________Applications
Desktop PCs
Motherboards
Instruments
Equipment Requiring IEC 1000-4-2 Compliance
Telecommunications
Network Servers
Typical Operating Circuit appears at end of data sheet.
V
STBY
V
DD
10
C1+ 11
T4IN 12
T5IN 13
T6IN 14
R6OUT 15
R7OUT 16
R8OUT 17
R9OUT 18
R10OUT 19
LapLink is a trademark of Traveling Software.
TSSOP
________________________________________________________________
Maxim Integrated Products
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Maxim
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