TXRX RS-232 3MBPS 2X2 20TQFN

MAX13235EETP+T

Manufacturer Part NumberMAX13235EETP+T
DescriptionTXRX RS-232 3MBPS 2X2 20TQFN
ManufacturerMaxim Integrated Products
TypeTransceiver
MAX13235EETP+T datasheet
 


Specifications of MAX13235EETP+T

Number Of Drivers/receivers2/2ProtocolRS232
Voltage - Supply3 V ~ 5.5 VMounting TypeSurface Mount
Package / Case20-TQFN Exposed PadLead Free Status / RoHS StatusLead free / RoHS Compliant
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19-4343; Rev 0; 10/08
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.
Telematics
Wireless Modules
GPS Systems
POS Systems
Industrial Systems
Communication Systems
Portable Devices
Data Cables
AutoShutdown Plus is a registered trademark of Maxim
Integrated Products, Inc.
DRIVERS/
PART
RECEIVERS
MAX13234EEUP+
2 x 2
MAX13234EETP+
2 x 2
MAX13235EEUP+
2 x 2
MAX13235EETP+
2 x 2
MAX13236EETE+
1 x 1
MAX13237EETE+
1 x 1
+ Denotes a lead-free/RoHS-compliant package.
* EP = Exposed pad.
________________________________________________________________ Maxim Integrated Products
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.
3Mbps RS-232 Transceivers with
Low-Voltage Interface
♦ Data Rate Up to 3Mbps
♦ Low-Voltage Logic Interface
♦ +3V to +5.5V Supply Voltage
♦ AutoShutdown Plus
♦ 1µA Shutdown Current
C1
C2
TTL/CMOS
INPUTS
TTL/CMOS
Applications
OUTPUTS
Functional Diagrams continued at end of data sheet.
Ordering Information/Selector Guide
MAXIMUM
DATA RATE
250kbps
250kbps
3Mbps
3Mbps
250kbps
3Mbps
Features
Functional Diagrams
1.62V to V
3.0V to 5.5V
CC
C
C
BYPASS1
BYPASS2
V
V
L
CC
C1+
V+
C3
C1-
MAX13234E
C2+
V-
MAX13235E
C4
C2-
T1IN
T1OUT
RS-232
OUTPUTS
T2IN
T2OUT
R1OUT
R1IN
5kΩ
RS-232
INPUTS
R2OUT
R2IN
FORCEOFF
5kΩ
FORCEON
READY
GND
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
20 TSSOP
-40°C to +85°C
20 TQFN-EP*
-40°C to +85°C
20 TSSOP
-40°C to +85°C
20 TQFN-EP*
-40°C to +85°C
16 TQFN-EP*
-40°C to +85°C
16 TQFN-EP*
1

MAX13235EETP+T Summary of contents

  • Page 1

    ... MAX13236EETE MAX13237EETE Denotes a lead-free/RoHS-compliant package Exposed pad. ________________________________________________________________ Maxim Integrated Products 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. 3Mbps RS-232 Transceivers with Low-Voltage Interface ♦ Data Rate Up to 3Mbps ♦ Low-Voltage Logic Interface ♦ ...

  • Page 2

    RS-232 Transceivers with Low-Voltage Interface ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) V ...................................................................... -0.3V to +6. ......................................................................... -0.3V to +6. ........................................................................ -0.3V to +7.0V V- ......................................................................... +0.3V to -7.0V (V+) + |(V-)| ..................................................................... ...

  • Page 3

    ELECTRICAL CHARACTERISTICS (continued +3V to +5.5V +1.62V +25°C.) (Note 2) PARAMETER SYMBOL RECEIVER INPUTS Input-Voltage Range Input Threshold Low Input Threshold High Input Hysteresis Input Resistance TRANSMITTER OUTPUTS ...

  • Page 4

    RS-232 Transceivers with Low-Voltage Interface ELECTRICAL CHARACTERISTICS (continued +3V to +5.5V +1.62V +25°C.) (Note 2) PARAMETER SYMBOL Transition-Region Slew Rate TIMING CHARACTERISTICS (MAX13235E/MAX13237E) Maximum Data Rate t ...

  • Page 5

    RECEIVER INPUTS TRANSMITTER INPUTS TRANSMITTER OUTPUTS V CC READY Figure 1. AutoShutdown Plus, and READY Timing Diagram T_IN T_OUT R_IN Figure 2. Receiver Test Circuit _______________________________________________________________________________________ 3Mbps RS-232 Transceivers with Low-Voltage Interface ...

  • Page 6

    RS-232 Transceivers with Low-Voltage Interface R_IN 1.3V t RPHL R_OUT Figure 3. Receiver Propagation Delay T_IN T_OUT Figure 4. Transmitter Test Circuit T_IN ...

  • Page 7

    V = 3.3V +25°C, unless otherwise noted TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE MAX13234E/MAX13236E R = 3kΩ 250kbps - 500 1000 ...

  • Page 8

    RS-232 Transceivers with Low-Voltage Interface ( 3.3V +25°C, unless otherwise noted READY TURN-OFF TIME vs. TEMPERATURE 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 -40 - ...

  • Page 9

    PIN MAX13234E/ MAX13236E/ MAX13235E MAX13237E TSSOP TQFN-EP TQFN- — — — — — — ...

  • Page 10

    RS-232 Transceivers with Low-Voltage Interface Detailed Description VL Logic Supply Input The MAX13234E–MAX13237E feature a separate logic supply input (V ) that sets the receiver’s output level and sets the transmitter’s input thresholds ( ...

  • Page 11

    EDGE T_IN DETECT EDGE R_IN DETECT FORCEON Figure 6. AutoShutdown Plus and Shutdown Logic Table 1. Transceiver Mode Control R_IN or T_IN FORCEOFF FORCEON EDGE WITHIN 30s Don’t Care. ______________________________________________________________________________________ ...

  • Page 12

    RS-232 Transceivers with Low-Voltage Interface ±15kV ESD Protection ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX13234E–MAX13237E have extra protection against static ...

  • Page 13

    ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 8a shows the Human Body Model and Figure 8b shows ...

  • Page 14

    RS-232 Transceivers with Low-Voltage Interface The MAX13234E–MAX13237E maintain the RS-232 ±5V minimum transmitter output voltage even at high data rates. Figure 11 shows a transmitter loopback test cir- cuit. Figure 12 shows a loopback test result at 120kbps, and ...

  • Page 15

    TOP VIEW + READY 1 20 FORCEOFF C1 GND C1 T1OUT MAX13234E MAX13235E C2 R1IN C2 R1OUT FORCEON T2OUT T1IN 8 13 R2IN T2IN ...

  • Page 16

    ... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...