mxl1535e Maxim Integrated Products, Inc., mxl1535e Datasheet

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mxl1535e

Manufacturer Part Number
mxl1535e
Description
+3v To +5v, 2500vrms Isolated Rs-485/rs-422 Transceivers With ?15kv Esd Protection
Manufacturer
Maxim Integrated Products, Inc.
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

Related parts for mxl1535e

mxl1535e Summary of contents

Page 1

... 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° ...

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 Supply Voltage V Logic-Side Supply Current Isolated-Side Supply Current Differential Driver Output Driver Output High Voltage V Driver Common-Mode Output ...

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, DI, RE Input High Voltage, SLO Input Low Voltage, DE, DI, RE Input Low Voltage, SLO Logic-Side Input Current, DE, DI ...

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 ST1, ST2 DC-Converter Impedance Low ST1, ST2 RE Low Output Current for Fault Detect RE High Output Current for Fault ...

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 PARAMETER SYMBOL Data Sample Jitter Max Baud Rate Driver-Differential Output Delay Time Driver-Differential Output Transition Time Driver-Output Enable Time ...

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

... RS- 485 signals and logic signals across the isolation barrier (including the isolation capacitors). The MAX3535E/ MXL1535E receivers are 1/8 unit load, allowing up to 256 devices on a single bus. The MAX3535E/MXL1535E feature fail-safe circuitry ensuring the receiver output maintains a logic-high ...

Page 17

... CC2 out threshold (2.80V nominal) 3) There is a problem that prevents the MAX3535E/ MXL1535E from communicating across its isolation barrier 4) The die temperature exceeds +150°C nominally, causing the part to go into thermal shutdown When a fault occurs, RO1 is switched to a logic-high state low (Table 3) ...

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

... 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. Keep stub lengths off the main line as short as possible. ...

Page 20

... 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 TRANSFORMER DRIVER OUTPUT STAGE V CC1 ST1 ST2 TRANSFORMER PRIMARY GND1 Figure 13. Transformer Driver Output Stage 20 ...

Page 21

... Most of the transformers in Table 6 are 1:1:1.3:1.3. By using a HALO TGM-010 or Midcom 95061 trans- former, it becomes possible to build a complete isolated RS-485/RS-422 transceiver with a maximum thickness Table 4. Transformers for the MXL1535E/MAX3535E MANUFACTURER Cooper Electronic Technologies, Inc. Cooper Electronic Technologies, Inc. EPCOS AG (Germany) (USA) Midcom, Inc ...

Page 22

... ESD of ±15kV without damage. The ESD structures withstand high ESD in all states. After an ESD event, the MAX3535E/MXL1535E keep working without latchup. ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of this product family are characterized for pro- tection to ± ...

Page 23

... PC board layout by minimizing interconnection lengths and crossovers: • For maximum isolation, the isolation barrier should not Skew be breached except by the MAX3535E/MXL1535E and the transformer. Connections and components from one side of the barrier should not be located near those of the other side of barrier. ...

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

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 cannot assume responsibility for use of any ...

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