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MAX13235EEUP+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
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.
EVALUATION KIT
AVAILABLE
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
LOGIC-LEVEL TRANSLA
TION
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
5kΩ
5kΩ
C4
C3
C1
C2
C
BYPASS1
MAX13234E–MAX13237E
3Mbps RS-232 Transceivers with
Low-Voltage Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +3V to +5.5V, V
L
= +1.62V to V
CC
, T
A
= -40°C to +85°C, C1–C4 = 0.1µF, V
CC
= V
L
, tested at 3.3V ±10%. Typical values are
at T
A
= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
(All voltages referenced to GND.)
V
CC
...................................................................... -0.3V to +6.0V
V
L
......................................................................... -0.3V to +6.0V
V+ ........................................................................ -0.3V to +7.0V
V- ......................................................................... +0.3V to -7.0V
(V+) + |(V-)| ..................................................................... +13.0V
T_IN, FORCEOFF, FORCEON ..................... -0.3V to (V
L
+ 0.3V)
R_IN ................................................................................... ±25V
T_OUT.............................................................................. ±13.2V
R_OUT, READY ........................................... -0.3V to (V
L
+ 0.3V)
Short-Circuit Duration
T_OUT to GND ......................................................... Continuous
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN (derate 20.8mW/°C above +70°C) ..... 1666mW
20-Pn TSSOP (derate 10.9mW/°C above +70°C) ...... 879mW
20-Pin TQFN (derate 21.3mW/°C above +70°C) ..... 1702mW
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1)
16-Pin TQFN ................................................................. 2°C/W
20-Pin TSSOP ............................................................. 20°C/W
20-Pin TQFN ................................................................. 2°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)
16-Pin TQFN ............................................................... 30°C/W
20-Pin TSSOP ............................................................. 73°C/W
20-Pin TQFN ............................................................... 29°C/W
Operating Temperature Range
MAX1323x Operating Temperature Range .... -40°C to +85°C
MAX1323x Operating Temperature Range .. -40°C to +105°C
Storage Temperature Range ........................... -65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300
º
C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
3 5.5 V
Logic Supply Voltage V
L
1.62 V
CC
V
FORCEOFF = FORCEON = V
L
, no loads 0.3 1 mA
V
L
= 0V 1 10
V
CC
Supply Current I
CC
AutoShutDown Plus, FORCEOFF = V
L
,
FORCEON = GND, all R_IN idle, all T_IN
idle.
110
µA
V
CC
Shutdown Current I
CCSH
FORCEOFF = GND 1 10 µA
V
L
Supply Current I
L
V
CC
= +5.5V 1 10 µA
V
L
Shutdown Current I
LSH
FORCEOFF = GND 1 10 µA
LOGIC INPUTS (T_IN, FORCEON, FORCEOFF, Referred to V
L
)
Input Threshold Low V
IL
Tested at room temperature only 1/3 x V
L
V
Input Threshold High V
IH
Tested at room temperature only 2/3 x V
L
V
Input Hysteresis 60 mV
Input Leakage Current ±0.01 ±1 µA
RECEIVER OUTPUTS (READY)
Output-Voltage Low V
OL
I
OUT
= 0.8mA 0.4 V
Output-Voltage High V
OH
I
OUT
= -0.5mA V
L
- 0.6 V
L
- 0.1 V
MAX13234E–MAX13237E
3Mbps RS-232 Transceivers with
Low-Voltage Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, V
L
= +1.62V to V
CC
, T
A
= -40°C to +85°C, C1–C4 = 0.1µF, V
CC
= V
L
, tested at 3.3V ±10%. Typical values are
at T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RECEIVER INPUTS
Input-Voltage Range - 25 +25 V
V
CC
= +3.3V 0.6 1.2
Input Threshold Low V
IL
T
A
= +25°C
V
CC
= +5V 0.8 1.5
V
V
CC
= +3.3V 1.5 2.4
Input Threshold High V
IH
T
A
= +25°C
V
CC
= +5V 1.8 2.4
V
Input Hysteresis 0.5 V
Input Resistance 357kΩ
TRANSMITTER OUTPUTS
Output-Voltage Swing
All transmitter outputs loaded with 3kΩ to
GND
±5 ±5.4 V
Output Resistance
V
CC
= V+ = V- = 0V, transmitter outputs =
±2V
300 10M Ω
Output Short-Circuit Current -60 +60 mA
Output Leakage Current
V
CC
= 0V or +3V to +5.5V, V
OUT
= ±12V,
transmitters disabled
-25 +25 µA
AutoShutdown Plus (FORCEON = GND, FORCEOFF = V
L
)
Positive threshold, Figure 1 2.7 V
Receiver Input Threshold Valid
Level
Negative threshold, Figure 1 -2.7 V
Receiver Input Threshold
Invalid Level
Figure 1 -0.3 +0.3 V
Receiver or Transmitter Edge-to-
Transmitters Enabled
t
WU
V
L
= 5V, Figure 1 (Note 3) 100 µs
Receiver or Transmitter Edge-to-
Transmitters Shutdown
t
AUTOSHDN
V
L
= 5V, Figure 1 (Note 3) 15 30 60 s
TIMING CHARACTERISTICS (MAX13234E/MAX13236E)
Maximum Data Rate
R
L
= 3kΩ, C
L
= 1000pF, one transmitter
switching
250 kbps
Receiver Propagation Delay
t
RPHL
,
t
RPLH
C
L
= 150pF, Figures 2, 3 0.15 µs
Transmitter Skew
|t
TPHL
-
t
TPLH
|
Figures 4, 5 (Note 4) 100 ns
Receiver Skew
|t
RPHL
-
t
RPLH
|
Figures 2, 3 50 ns
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX13235EEUP+

Mfr. #:
Buy MAX13235EEUP+
Manufacturer:
Maxim Integrated
Description:
RS-232 Interface IC 3-5.5V 3Mbps RS232 Line Driver/Receiver
Lifecycle:
New from this manufacturer.
Delivery:
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