Rainbow Electronics MAX13237E - Manual

General Description
The MAX13234E–MAX13237E are +3V to +5.5V pow-
ered EIA/TIA-232 and V.28/V.24 communications inter-
faces with high data-rate capabilities (up to 3Mbps), a
flexible logic voltage interface, and enhanced electro-
static discharge (ESD) protection. All receiver inputs
and transmitter outputs are protected to ±15kV IEC
61000–4-2 Air Gap Discharge, ±8kV IEC 61000-4-2
Contact Discharge, and ±15kV Human Body Model.
The MAX13234E/MAX13235E have two receivers and
two transmitters, while the MAX13236E/MAX13237E
have a single receiver and transmitter. The transmitters
have a low-dropout transmitter output stage, delivering
true RS-232 performance from a +3V to +5.5V supply
based on a dual charge pump. The charge pump
requires only four small 0.1µF capacitors for operation
from a +3.3V supply.
All devices achieve a 1µA supply current using Maxim’s
AutoShutdown Plus™ feature. These devices automati-
cally enter a low-power shutdown mode when the
RS-232 cable is disconnected or the devices driving
the transmitter and receiver inputs are inactive for more
than 30s.
The MAX13234E–MAX13237E are available in space-
saving TQFN and TSSOP packages and operate over
the -40°C to +85°C extended temperature range.
Applications
Features
♦ Data Rate Up to 3Mbps
♦ Low-Voltage Logic Interface
♦ +3V to +5.5V Supply Voltage
♦ AutoShutdown Plus
♦ 1µA Shutdown Current
MAX13234E–MAX13237E
3Mbps RS-232 Transceivers with
Low-Voltage Interface
________________________________________________________________ Maxim Integrated Products 1
Ordering Information/Selector Guide
19-4343; Rev 0; 10/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART
DRIVERS/
RECEIVERS
MAXIMUM
DATA RATE
TEMP RANGE PIN-PACKAGE
MAX13234EEUP+ 2 x 2 250kbps -40°C to +85°C 20 TSSOP
MAX13234EETP+ 2 x 2 250kbps -40°C to +85°C 20 TQFN-EP*
MAX13235EEUP+ 2 x 2 3Mbps -40°C to +85°C 20 TSSOP
MAX13235EETP+ 2 x 2 3Mbps -40°C to +85°C 20 TQFN-EP*
MAX13236EETE+ 1 x 1 250kbps -40°C to +85°C 16 TQFN-EP*
MAX13237EETE+ 1 x 1 3Mbps -40°C to +85°C 16 TQFN-EP*
Telematics
GPS Systems
Industrial Systems
Portable Devices
Wireless Modules
POS Systems
Communication Systems
Data Cables
AutoShutdown Plus is a registered trademark of Maxim
Integrated Products, Inc.
Functional Diagrams continued at end of data sheet.
+ Denotes a lead-free/RoHS-compliant package.
* EP = Exposed pad.
Functional Diagrams
LO
G
IC
-L
EV
EL
T
RA
N
S
LA
TIO
N
T2IN
T1IN
R1OUT
R2OUT
FORCEOFF
FORCEON
READY
C1+
C1-
C2+
C2-
V L V CC
1.62V to V CC 3.0V to 5.5V
V+
V-
C BYPASS2
GND
RS-232
OUTPUTS
RS-232
INPUTS TTL/CMOS
OUTPUTS
TTL/CMOS
INPUTS
T1OUT
T2OUT
R1IN
R2IN
MAX13234E
MAX13235E
5k Ω
5k Ω
C4
C3
C1
C2
C BYPASS1