MAX3222/MAX3232/
MAX3237/MAX3241
3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
________________General Description
__Next Generation Device Features
♦ For Smaller Packaging:
The MAX3222/MAX3232/MAX3237/MAX3241 trans-
ceivers have a proprietary low-dropout transmitter out-
put stage enabling true RS-232 performance from a
3.0V to 5.5V supply with a dual charge pump. The
devices require only four small 0.1µF external charge-
pump capacitors. The MAX3222, MAX3232, and
MAX3241 are guaranteed to run at data rates of
120kbps while maintaining RS-232 output levels. The
MAX3237 is guaranteed to run at data rates of 250kbps
in the normal operating mode and 1Mbps in the
MegaBaud™ operating mode, while maintaining RS-232
output levels.
MAX3228E/MAX3229E: +2.5V to +5.5V RS-232
Transceivers in UCSP™
♦ For Integrated ESD Protection:
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: 15kV ESD-Protected, Down to 10nA,
3.0V to 5.5V, Up to 1Mbps, True RS-232
Transceivers
♦ For Low-Voltage or Data Cable Applications:
MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,
2 Tx/2 Rx RS-232 Transceivers with 15kV
ESD-Protected I/O and Logic Pins
The MAX3222/MAX3232 have 2 receivers and 2
drivers. The MAX3222 features a 1µA shutdown mode
that reduces power consumption and extends battery
life in portable systems. Its receivers remain active in
shutdown mode, allowing external devices such as
modems to be monitored using only 1µA supply cur-
rent. The MAX3222 and MAX3232 are pin, package,
and functionally compatible with the industry-standard
MAX242 and MAX232, respectively.
_______________Ordering Information
PKG
CODE
PART
TEMP RANGE
PIN-PACKAGE
MAX3222CUP+ 0°C to +70°C
MAX3222CAP+ 0°C to +70°C
MAX3222CWN+ 0°C to +70°C
MAX3222CPN+ 0°C to +70°C
+Denotes lead-free package.
20 TSSOP
20 SSOP
18 SO
U20+2
A20+1
W18+1
P18+5
The MAX3241 is a complete serial port (3 drivers/
5 receivers) designed for notebook and subnotebook
computers. The MAX3237 (5 drivers/3 receivers) is ideal
for fast modem applications. Both these devices feature
a shutdown mode in which all receivers can remain
active while using only 1µA supply current. Receivers R1
(MAX3237/MAX3241) and R2 (MAX3241) have extra out-
puts in addition to their standard outputs. These extra
outputs are always active, allowing external devices
such as a modem to be monitored without forward bias-
18 Plastic Dip
Ordering Information continued at end of data sheet.
ing the protection diodes in circuitry that may have V
completely removed.
CC
_________________Pin Configurations
The MAX3222, MAX3237, and MAX3241 are available
in space-saving TSSOP and SSOP packages.
TOP VIEW
+
EN
C1+
V+
1
2
3
4
5
6
7
8
9
SHDN
18
17
16
15
14
13
12
11
10
V
________________________Applications
Notebook, Subnotebook, and Palmtop Computers
High-Speed Modems
CC
GND
MAX3222
MAX3222
T1OUT
R1IN
C1-
C2+
C2-
Battery-Powered Equipment
Hand-Held Equipment
R1OUT
T1IN
V-
Peripherals
T2IN
T2OUT
R2IN
Printers
R2OUT
DIP/SO
Typical Operating Circuits appear at end of data sheet.
Pin Configurations continued at end of data sheet.
MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc.
*
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-0273; Rev 7; 1/07