MAX3237E
3-V TO 5.5-V MULTICHANNEL RS-232
1-MBit/s LINE DRIVER/RECEIVER
www.ti.com
SLLS709A–MAY 2006–REVISED OCTOBER 2006
FEATURES
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Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
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ESD Protection for RS-232 I/O Pins and Logic
Input pins
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Operates With 3-V to 5.5-V VCC Supply
Operates From 250 kbits/s to 1 Mbit/s
Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.1 µF
– ±15 kV – Human-Body Model (HBM)
– ±8 kV – IEC61000-4-2, Contact Discharge
– ±15 kV – IEC61000-4-2, Air-Gap Discharge
APPLICATIONS
Accepts 5-V Logic Input With 3.3-V Supply
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Battery-Powered, Hand-Held, and Portable
Equipment
PDAs and Palmtop PCs
Notebooks, Sub-Notebooks, and Laptops
Digital Cameras
Designed to Be Interchangeable With Maxim
MAX3237E
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Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
Mobile Phones and Wireless Devices
DB, DW, OR PW PACKAGE
(TOP VIEW)
QFN PACKAGE
(TOP VIEW)
C2+
GND
C2−
C1+
V+
1
28
27
26
25
24
23
22
21
20
19
18
17
2
V
CC
3
32 31 30 29 28 27 26 25
V−
C1−
DIN1
4
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
C1–
DIN1
IN2
DIN3
ROUT1
ROUT2
DIN4
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
DOUT1
DOUT2
DOUT3
RIN1
5
DIN2
6
DIN3
7
ROUT1
ROUT2
DIN4
8
RIN2
DOUT4
RIN3
9
10
11
12
ROUT3
ROUT3
DIN5
NC
DOUT5
9 10 11 12 13 14 15 16
EN 13
14
16 ROUT1B
15
SHDN
MBAUD
DESCRIPTION
The MAX3237E consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV
ESD protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of
TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the
serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to
5.5-V supply. This device operates at data signaling rates of 250 kbit/s in normal operating mode
(MBAUD = GND) and 1Mbit/s when MBAUD = VCC. The driver output slew rate is a maximum of 30 V/µs.
DESCRIPTION (CONTINUED)
The MAX3237E transmitters are disabled and the outputs are forced into high-impedance state when the device
is in shutdown mode (SHDN = GND) and the supply current falls to less than 1 µA. Also, during shutdown, the
onboard charge pump is disabled; V+ is lowered to VCC, and V– is raised toward GND. Receiver outputs also
can be placed in the high-impedance state by setting enable (EN) high. ROUT1B remains active all the time,
regardless of the EN and SHDN condition.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.