MAX3535EEWI-T Maxim Integrated, MAX3535EEWI-T Datasheet

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MAX3535EEWI-T

Manufacturer Part Number
MAX3535EEWI-T
Description
RS-422/RS-485 Interface IC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX3535EEWI-T

Data Rate
1136 Kbps
Operating Supply Voltage
3 V to 5.5 V
Supply Current
5.9 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Input Voltage
0.8 V to 2 V
Maximum Power Dissipation
750 mW
Output Voltage
0.4 V to 3.7 V
Product
RS-422/RS-485 Combination
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark 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.
The MAX3535E/MXL1535E isolated RS-485/RS-422 full-
duplex transceivers provide 2500V
tion between the RS-485/RS-422 side and the processor
or control logic side. These devices allow fast,
1000kbps communication across an isolation barrier
when the common-mode voltages (i.e., the ground
potentials) on either side of the barrier are subject to
large differences. Isolation is achieved through integrat-
ed high-voltage capacitors. The MAX3535E/MXL1535E
also feature a 420kHz transformer driver that allows
power transfer to the RS-485 side using an external
transformer.
The MAX3535E/MXL1535E include one differential driver,
one receiver, and internal circuitry to send the RS-485
signals and control signals across the isolation barrier
(including the isolation capacitors). The MAX3535E/
MXL1535E RS-485 receivers are 1/8 unit load, allowing
up to 256 devices on the same bus.
The MAX3535E/MXL1535E feature true fail-safe circuitry.
The driver outputs and the receiver inputs are protected
from ±15kV electrostatic discharge (ESD) on the inter-
face side, as specified in the Human Body Model (HBM).
The MAX3535E/MXL1535E feature driver slew-rate
select that minimizes electromagnetic interference (EMI)
and reduces reflections. The driver outputs are short-cir-
cuit and overvoltage protected. Other features are hot-
swap capability and isolation-barrier fault detection.
The MAX3535E operates with a single +3V to +5.5V
power supply. The improved secondary supply range of
the MAX3535E allows the use of step-down transformers
for +5V operation, resulting in considerable power sav-
ings. The MXL1535E operates with a single +4.5V to
+5.5V power supply. The MXL1535E is a function-/pin-
compatible improvement of the LTC1535. The
MAX3535E/MXL1535E are available over the commer-
cial 0°C to +70°C and extended -40°C to +85°C temper-
ature ranges.
Typical Application Circuit appears at end of data sheet.
Isolated RS-485 Systems
Systems with Large Common-Mode Voltages
Industrial-Control Local Area Networks
Telecommunications Systems
+3V to +5V, 2500V
Functional Diagrams
Transceivers with ±15kV ESD Protection
General Description
RMS
Applications
of galvanic isola-
RMS
MAX3535E/MXL1535E
♦ 2500V
♦ 1000kbps Full-Duplex RS-485/RS-422
♦ +3V to +5.5V Power-Supply Voltage Range
♦ +4.5V to +5.5V Power-Supply Voltage Range
♦ 1/8 Unit Receiver Load, Allowing 256 Devices on
♦ ±15kV ESD Protection Using HBM
♦ Pin-Selectable Slew-Rate Limiting Controls EMI
♦ Hot-Swap-Protected Driver-Enable Input
♦ Undervoltage Lockout
♦ Isolation-Barrier Fault Detection
♦ Short-Circuit Protected
♦ Thermal Shutdown
♦ Open-Line and Shorted-Line Fail-Safe Receiver
MAX3535ECWI
MAX3535EEWI
MXL1535ECWI
MXL1535EEWI
Isolated RS-485/RS-422
High-Voltage Capacitors
Communication
(MAX3535E)
(MXL1535E)
Bus
Inputs
TOP VIEW
PART
RMS
RS-485 Bus Isolation Using On-Chip
PINS 5–10 and 19–24 ARE REMOVED FROM THE PACKAGE
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
GND1
GND2
V
V
ST1
ST2
CC1
CC2
Z
Y
11
12
13
14
1
2
3
4
Ordering Information
Ordering Information
EVALUATION KIT AVAILABLE
WIDE SO
MAX3535E
MXL1535E
Pin Configuration
28 Wi d e S O
28 Wi d e S O
28 Wi d e S O
28 Wi d e S O
PACKAGE
PIN-
28
27
26
25
18
17
16
15
RO1
RE
DE
DI
SLO
RO2
A
B
19-3270; Rev 0; 4/04
Features
+ 3.0 to + 5.5
+ 3.0 to + 5.5
+ 4.5 to + 5.5
+ 4.5 to + 5.5
POWER-
SUPPLY
RANGE
(V)

Related parts for MAX3535EEWI-T

MAX3535EEWI-T Summary of contents

Page 1

... Hot-Swap-Protected Driver-Enable Input ♦ Undervoltage Lockout ♦ Isolation-Barrier Fault Detection ♦ Short-Circuit Protected ♦ Thermal Shutdown ♦ Open-Line and Shorted-Line Fail-Safe Receiver Inputs PART MAX3535ECWI MAX3535EEWI MXL1535ECWI MXL1535EEWI TOP VIEW Applications EVALUATION KIT AVAILABLE Features RS-485 Bus Isolation Using On-Chip Ordering Information ...

Page 2

... CC1 (derate 9.5mW/°C above +70°C) .................................750mW Operating Temperature Range + 0.3V) MXL1535ECWI, MAX3535ECWI .........................0°C to +70°C CC2 MXL1535EEWI, MAX3535EEWI .......................-40°C to +85°C + 0.3V) and +3.4V Junction Temperature ......................................................+150°C CC2 Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C = -40°C to +85°C, unless otherwise noted. Typical values are at V ...

Page 3

... Change in Magnitude of Driver Differential Output Voltage for Complementary Output States Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States Driver Short-Circuit Output Current Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS = -40°C to +85°C, unless otherwise noted. Typical values are SYMBOL CONDITIONS ...

Page 4

... Human Body Model ( MIN TYP - 1V) +2V] CC2 - 1V) +2V] CC2 +25 3.0 100 -200 - 2.6 2.4 2500 3000 100 10,000 2 ±15 = +25°C, A MAX UNITS -25 µA V 1.0 V kΩ +125 µA -100 - 200 kΩ 0 RMS MΩ Maxim Integrated ...

Page 5

... Receiver-Propagation Delay Time to RO2 RO1, RO2 Rise or Fall Time Receiver-Output Enable Time RO1 Receiver-Output Disable Time RO1 Initial Startup Time (from Internal Communication Fault) Internal Communication Timeout Fault Time Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS = 27Ω 50pF +25°C.) SYMBOL ...

Page 6

... Z CC2 I OSFD Driver enabled (DE = high +1V < V < +12V low +1V < V < +12V Y MIN TYP 4.5 4.5 5 27Ω ∞ +4.5V, Figure 1 2.0 3.0 = +4.5V, Figure 1 1.5 2.5 1.0 -250 +25 = +5V, CC1 MAX UNITS 5 5.0 V 3.0 V ±0.2 V ±0 +250 -25 mA Maxim Integrated ...

Page 7

... Receiver-Output Low Voltage (RO1) Driver-Output Leakage Current Driver-Output Leakage Current Receiver-Output (RO2) High Voltage Receiver-Output (RO2) Low Voltage DC-Converter Switching Frequency (ST1, ST2) Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS = -40°C to +85°C, unless otherwise noted. Typical values are SYMBOL CONDITIONS V V ...

Page 8

... RE = +0.4V, fault not asserted RE = source current 0.5V, fault asserted CC1 V UVL2 V UVH2 V UVL1 V UVH1 60s V ISO +3V SLO SLO = +5V, CC1 MIN TYP MAX UNITS Ω Ω 2.5 5 -40 -50 -80 µA 60 100 140 µA 2.68 2.85 3.02 V 2.77 2.95 3.13 V 2.53 2.69 2.85 V 2.63 2.80 2.97 V 2500 V RMS 3000 100 kΩ Maxim Integrated ...

Page 9

... Skew section for more information. Note 5: Initial startup time is the time for communication to recover after a fault condition. Internal communication timeout fault time is the time before a fault is indicated on RE, after internal communication has stopped. Note bits. Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS = 27Ω ...

Page 10

... TEMPERATURE (°C) SWITCHER FREQUENCY vs. SUPPLY VOLTAGE 600 550 500 450 400 350 300 3.0 3.5 4 CC1 f = 700kbps DATA SLO = LOW R = 27Ω +6V CC2 V = +3.9V CC2 (MAX3535E +3.13V CC2 (MAX3535E 27Ω L SLO = V CC2 = +3.13V (MAX3535E) FIGURES 4.5 5.0 5.5 (V) Maxim Integrated ...

Page 11

... DRIVER SOURCE CURRENT (mA) RECEIVER OUTPUT (RO1) VOLTAGE vs. LOAD CURRENT 5 OUTPUT HIGH, SOURCING OUTPUT LOW, SINKING LOAD CURRENT (mA) Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS Typical Operating Characteristics (continued) RECEIVER-OUTPUT (RO1) HIGH VOLTAGE vs. TEMPERATURE 5 +5V CC1 4 +4.5V CC1 4.0 3 ...

Page 12

... MAX3535E toc24 DE 2V/div Y 2V/div DRIVER PROPAGATION DELAY (SLO = HIGH) DI 2V/div Y 2V/div Z 2V/div 400ns/div DRIVER ENABLE TIME PLUS JITTER MAX3535E toc23 DE 2V/div Y 2V/div 200ns/div RECEIVER (RO1) PROPAGATION DELAY (t ) PHL1 MAX3535E toc25 A-B 1V/div RO 1V/div 100ns/div MAX3535E toc21 DI 2V/div Y 2V/div Z 2V/div Maxim Integrated ...

Page 13

... DE Logic RE 27 Logic 28 RO1 Logic Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS Logic-Side/Transformer-Driver Power Input. Bypass V capacitors. Transformer-Driver Phase 1 Power Output. Connect ST1 to isolation-transformer primary to send power to isolation side of barrier. Transformer-Driver Phase 2 Power Output. Connect ST2 to isolation-transformer primary to send power to isolation side of barrier. ...

Page 14

... TRANSCEIVER TRANSCEIVER ISOLATION BARRIER Test Circuits 500Ω Y/Z 500Ω CC1 1kΩ RO1/RO2 1kΩ GND1/GND2 CONTROL GROUND 0.1μF RS-485 GROUND GND2 V CC2 VOLTAGE REGULATOR A B RECEIVER RO2 DRIVER CC2 SLO V CC2 GND2 /V CC2 Maxim Integrated ...

Page 15

... DOH DOH OUTPUT NORMALLY LOW V DOL V DOH OUTPUT NORMALLY HIGH DOH 0V t PZH Figure 7. Driver Enable and Disable Times Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS 1. RO1H RO1 V RO1L RO2 80 Figure 8 ...

Page 16

... When using RE to control the receiver-enable output function, be sure to drive it using a gate that has enough sink and source capabili overcome the internal drive. Fail Safe Driver Output Protection Monitoring Faults on RE Maxim Integrated ...

Page 17

... BIDIRECTIONAL MICROCONTROLLER I FAULT R Figure 10. Reading a Fault Condition Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS Read RE for fault conditions by using a bidirectional microcontroller I/O line or a tri-stated buffer as shown in Figure 10. When using a tri-stated buffer, enable the driver whenever the voltage on RE needs to be forced to a logic-high or logic-low ...

Page 18

... High High High impedance impedance impedance Active Active High High High impedance impedance impedance Disabled Disabled High High (100µA pullup) (100µA pullup INTERNAL FAULT On High Active Communication attempted High (100µA pullup) Maxim Integrated ...

Page 19

... RO1 GND1 Figure 11. Typical Half-Duplex Multidrop RS-485 Network Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS multidrop-network applications circuit. Figure 12 shows the MAX3535E/MXL1535E functioning as line repeaters with cable lengths longer than 4000ft. To minimize reflections, terminate the line at both ends in its charac- teristic impedance ...

Page 20

... Using +5.5V and 290kHz gives a required minimum ET CONTROL GROUND RS-422 GROUND +5V ST1 V CC1 0.1μF 10μF MAX488 RO1 GND1 Transformer Selection MAX MIN is the worst-case maximum supply voltage, MAX is the minimum frequency at that supply voltage. MIN Maxim Integrated ...

Page 21

... PCA Electronics, Inc. EPC3115S-5 Rhom b us Ind ustr i es, Inc. T-1110 Premier Magnetics, Inc. PM-SM15 Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS less than 0.1in. To minimize power consumption, select the turns ratio of the transformer to produce the minimum DC voltage required at V high-temperature, low-V ...

Page 22

... WEBSITE www.haloelectronics.com/6pin.html www.bhelectronics.com/PDFs/DC- DCConverterTransformers.pdf www.coilcraft.com/minitrans.cfm www.dc-dc.com/products/productline.asp?ED=9 www.midcom-inc.com www.pca.com/Datasheets/EPC3117S-X.pdf www.rhombus-ind.com/pt-cat/maxim.pdf www.premiermag.com/pdf/pmsm15.pdf R 1MΩ R 1500Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR C s STORAGE 100pF CAPACITOR DC DEVICE UNDER TEST Maxim Integrated ...

Page 23

... PLH1 PHL1 specification implies a data rate of 877kbps. Lower data rates result in less distortion and jitter (Figure 16). Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) Figure 16. Data Skew vs. Data Rate Graph ...

Page 24

... TRANSFORMER DRIVER 10μF RO1 MAX3535E GND1 BARRIER BARRIER TRANSCEIVER TRANSCEIVER ISOLATION BARRIER PROCESS: BiCMOS TRANSISTOR COUNT: 7379 Typical Application Circuit CONTROL GROUND 0.1μF RS-485 GROUND GND2 V CC2 VOLTAGE REGULATOR A B RECEIVER RO2 DRIVER CC2 SLO Chip Information Maxim Integrated ...

Page 25

... Transceivers with ±15kV ESD Protection (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Maxim Integrated MAX3535E/MXL1535E Isolated RS-485/RS-422 RMS Package Information 25 ...

Page 26

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 26 © 2004 Maxim Integrated Isolated RS-485/RS-422 RMS Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc. ...

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