MAX3535EEWI Maxim Integrated Products, MAX3535EEWI Datasheet

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MAX3535EEWI

Manufacturer Part Number
MAX3535EEWI
Description
Manufacturer
Maxim Integrated Products
Datasheet

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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.
19-3270; Rev 0; 4/04
Typical Application Circuit appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Isolated RS-485 Systems
Systems with Large Common-Mode Voltages
Industrial-Control Local Area Networks
Telecommunications Systems
+3V to +5V, 2500V
________________________________________________________________ Maxim Integrated Products
Transceivers with ±15kV ESD Protection
General Description
RMS
Applications
of galvanic isola-
RMS
♦ 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
CC1
ST1
ST2
CC2
Y
Z
11
12
13
14
Ordering Information
1
2
3
4
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
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)
1

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MAX3535EEWI 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 Features RS-485 Bus Isolation Using On-Chip RMS Ordering Information ...

Page 2

... CC1 (derate 9.5mW/°C above +70°C) .................................750mW Operating Temperature Range MXL1535ECWI, MAX3535ECWI .........................0°C to +70°C + 0.3V) 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

Transceivers with ±15kV ESD Protection DC ELECTRICAL CHARACTERISTICS TABLE (MAX3535E) (continued +3.0V to +5.5V +3.13V to +7.5V, T CC1 CC2 V = +5V +25°C.) CC2 A PARAMETER SYMBOL RE High ...

Page 4

Transceivers with ±15kV ESD Protection DC ELECTRICAL CHARACTERISTICS TABLE (MAX3535E) (continued +3.0V to +5.5V +3.13V to +7.5V, T CC1 CC2 V = +3.3V +5V). CC1 CC2 PARAMETER SYMBOL Driver Short-Circuit ...

Page 5

Transceivers with ±15kV ESD Protection SWITCHING ELECTRICAL CHARACTERISTICS (MAX3535E +3.0V to +5.5V +3.13V to +7.5V, R CC1 CC2 are +3.3V +5V +25°C.) CC1 CC2 A ...

Page 6

Transceivers with ±15kV ESD Protection ELECTRICAL CHARACTERISTICS (MXL1535E +4.5V to +5.5V +4.5V to +7.5V, T CC1 CC2 V = +5V +25°C.) CC2 A PARAMETER SYMBOL Logic-Side Supply Voltage V Isolated-Side ...

Page 7

Transceivers with ±15kV ESD Protection ELECTRICAL CHARACTERISTICS (MXL1535E) (continued +4.5V to +5.5V +4.5V to +7.5V, T CC1 CC2 V = +5V +25°C.) CC2 A PARAMETER SYMBOL Input High Voltage, DE, ...

Page 8

Transceivers with ±15kV ESD Protection ELECTRICAL CHARACTERISTICS (MXL1535E) (continued +4.5V to +5.5V +4.5V to +7.5V, T CC1 CC2 V = +5V +25°C.) CC2 A PARAMETER SYMBOL DC-Converter Impedance High R ...

Page 9

Transceivers with ±15kV ESD Protection SWITCHING ELECTRICAL CHARACTERISTICS (MXL1535E +4.5V to +5.5V +4.5V to +7.5V, R CC1 CC2 are +5V +5V +25°C.) CC1 CC2 A ...

Page 10

Transceivers with ±15kV ESD Protection (V = +5V 50pF (Figure 1), unless otherwise noted.) CC1 L I SUPPLY CURRENT CC1 vs. TEMPERATURE 100 HALO TGM-250NS 1:1:1 TRANSFORMER 27Ω ...

Page 11

Transceivers with ±15kV ESD Protection (V = +5V 50pF (Figure 1), unless otherwise noted.) CC1 L RECEIVER-OUTPUT (RO1) LOW VOLTAGE vs. TEMPERATURE 1 4mA SINK 0.8 0.6 0 +3V CC1 ...

Page 12

Transceivers with ±15kV ESD Protection (V = +5V 50pF (Figure 1), unless otherwise noted.) CC1 L RECEIVER (RO1) PROPAGATION DELAY (t ) PLH1 MAX3535E toc19 A-B 1V/div RO 1V/div 100ns/div JITTER vs. TEMPERATURE 300 ...

Page 13

Transceivers with ±15kV ESD Protection PIN NAME ISOLATION SIDE 1 V Logic CC1 2 ST1 Logic 3 ST2 Logic 4 GND1 Logic 5–10, — — 19–24 11 GND2 Isolated 12 Z Isolated 13 Y Isolated 14 ...

Page 14

Transceivers with ±15kV ESD Protection Figure 1. Driver DC Test Load HIGH GND Figure 2. Driver Timing Test Circuit +3.0V TO +5.5V V CC1 ...

Page 15

Transceivers with ±15kV ESD Protection t < 10ns, t < 10ns 1. DOH Y 1/2 V DOH V DOH 80 ...

Page 16

Transceivers with ±15kV ESD Protection Detailed Description The MAX3535E/MXL1535E isolated RS-485/RS-422 full- duplex transceivers provide 2500V RMS tion between the RS-485/RS-422 isolation side and the processor or logic side. These devices allow fast, 1000kbps communication across ...

Page 17

Transceivers with ±15kV ESD Protection When not actively driving RE, it functions as the fault indicator (Table 3). A low on RE indicates the part is functioning properly, while a high indicates a fault is present. ...

Page 18

Transceivers with ±15kV ESD Protection Table 1. Transmitting Logic INPUTS Table 2. Receiving Logic INPUTS Inputs open/shorted Inputs open/shorted Table 3. Fault Mode NORMAL MODE ...

Page 19

Transceivers with ±15kV ESD Protection Applications Information Typical Applications The MAX3535E/MXL1535E transceivers facilitate bi- directional data communications on multipoint bus transmission lines. Figure 11 shows a typical RS-485 +3.3V V CC1 ...

Page 20

Transceivers with ±15kV ESD Protection 0.1µF V CC2 VOLTAGE REGULATOR A 120Ω RECEIVER RO2 Y DRIVER R 120Ω CC2 SLO Figure 12. Using the MAX3535E/MXL1535E as an RS-422 Line Repeater ...

Page 21

Transceivers with ±15kV ESD Protection product of 9.5V-µs. The commercially available trans- formers for the MAX845 listed in Table 5 meet that requirement. In most cases, use half of the center-tapped primary winding with the MAX3535E ...

Page 22

Transceivers with ±15kV ESD Protection Table 6. Transformers for MAX3535E at +3.3V PART MANUFACTURER NUMBER TGM-040 TGM-240 HALO Electronics, Inc. TGM-340 TGM-340 BH Electronics, Inc. 500-2582 Coilcraft, Inc. Q4470-C 78253335 Newport/C&D Technologies 76253335 95062 Midcom, Inc. ...

Page 23

Transceivers with ±15kV ESD Protection I 100 90% AMPERES 36.8% 10% 0 TIME CURRENT WAVEFORM Figure 15. Human Body Current Waveform The Machine Model for ESD tests all ...

Page 24

Transceivers with ±15kV ESD Protection +3.3V V CC1 0.1µF 10µF RO1 µC GND1 24 ______________________________________________________________________________________ Isolated RS-485/RS-422 RMS TGM-240 1/2 BAT54C 10µF 1/2 BAT54C ST1 ST2 GND2 TRANSFORMER DRIVER MAX3535E BARRIER BARRIER TRANSCEIVER ...

Page 25

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 25 © 2004 Maxim Integrated Products ...

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