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PDF MAX3535E Data sheet ( Hoja de datos )
| Número de pieza | MAX3535E | |
| Descripción | RS-485/RS-422 Transceivers | |
| Fabricantes | Maxim Integrated | |
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EVALUATION KIT AVAILABLE
AVAILABLE
MAX3535E/MXL1535E
+3V to +5V, 2500VRMS Isolated RS-485/RS-422
Transceivers with ±15kV ESD Protection
General Description
The MAX3535E/MXL1535E isolated RS-485/RS-422 full-
duplex transceivers provide 2500VRMS of galvanic isola-
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 impFrouvnedcsteicoonndaalryDsuipapglyrraanmgesof
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.
Applications
Isolated RS-485 Systems
Systems with Large Common-Mode Voltages
Industrial-Control Local Area Networks
Telecommunications Systems
Typical Application Circuit appears at end of data sheet.
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.
Features
♦ 2500VRMS RS-485 Bus Isolation Using On-Chip
High-Voltage Capacitors
♦ 1000kbps Full-Duplex RS-485/RS-422
Communication
♦ +3V to +5.5V Power-Supply Voltage Range
(MAX3535E)
♦ +4.5V to +5.5V Power-Supply Voltage Range
(MXL1535E)
♦ 1/8 Unit Receiver Load, Allowing 256 Devices on
Bus
♦ ±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
Inputs
OOrrddeerriinngg IInnffoorrmmaattiioonn
PART
TEMP RANGE
PIN-
PACKAGE
MAX3535ECWI 0°C to +70°C
MAX3535EEWI -40°C to +85°C
MXL1535ECWI 0°C to +70°C
MXL1535EEWI -40°C to +85°C
28 Wide SO
28 Wide SO
28 Wide SO
28 Wide SO
POWER-
SUPPLY
RANGE
(V)
+3.0 to +5.5
+3.0 to +5.5
+4.5 to +5.5
+4.5 to +5.5
TOP VIEW
Pin Configuration
VCC1 1
ST1 2
ST2 3
GND1 4
28 RO1
27 RE
26 DE
25 DI
MAX3535E
MXL1535E
GND2 11
18 SLO
Z 12
17 RO2
Y 13
16 A
VCC2 14
15 B
WIDE SO
PINS 5–10 and 19–24 ARE REMOVED FROM THE PACKAGE
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-3270; Rev 0; 4/04
1 page  
MAX3535E/MXL1535E
+3V to +5V, 2500VRMS Isolated RS-485/RS-422
Transceivers with ±15kV ESD Protection
SWITCHING ELECTRICAL CHARACTERISTICS (MAX3535E)
(VCC1 = +3.0V to +5.5V, VCC2 = +3.13V to +7.5V, RL = 27Ω, CL = 50pF, TA = -40°C to +85°C, unless otherwise noted. Typical values
are at VCC1 = +3.3V, VCC2 = +5V, TA = +25°C.)
PARAMETER
Data Sample Jitter
Maximum Data Rate
Self-Oscillating Frequency
Driver-Differential Output Delay
Time
Driver-Differential Output
Transition Time
Driver-Output Enable Time
SYMBOL
tJ
fDATA
fSOS
tDD
tTD
tPZL, tPZH
CONDITIONS
Figure 6
tJ = 25% of data cell, receiver and driver,
SLO = high (Note 4)
SLO = high, Figure 5
SLO = low, Figure 5
SLO = high, Figures 2, 6
SLO = low, Figures 2, 6
SLO = high, Figures 2, 6
SLO = low, Figures 2, 6
SLO = high, DI = high or low,
Figures 3, 7
MIN TYP MAX UNITS
220 285
ns
877 1136
kbps
250 450
200 375
kHz
490 855
850 1560
ns
30 100
120 220 1000
ns
730 1400
ns
Driver-Output Disable Time
tPHZ, tPLZ
SLO = high, DI = high or low,
Figures 3, 7
720 1300
ns
Receiver-Propagation Delay Time
to RO1
Receiver-Propagation Delay Time
to RO2
RO1, RO2 Rise or Fall Time
Receiver-Output Enable Time
RO1
tPLH1,
tPHL1
tPLH2,
tPHL2
tR, tF
tZL,tZH
Figures 4, 8
Figures 4, 8
Figures 4, 8
Figures 4, 9
440 855
40
40
30
ns
ns
ns
ns
Receiver-Output Disable Time
RO1
tLZ,tHZ Figures 4, 9
30 ns
Initial Startup Time (from Internal
Communication Fault)
(Note 5)
1200
ns
Internal Communication Timeout
Fault Time
(Note 5)
1200
ns
Maxim Integrated
5
5 Page 
MAX3535E/MXL1535E
+3V to +5V, 2500VRMS Isolated RS-485/RS-422
Transceivers with ±15kV ESD Protection
Typical Operating Characteristics (continued)
(VCC1 = +5V, CL = 50pF (Figure 1), unless otherwise noted.)
RECEIVER-OUTPUT (RO1) LOW VOLTAGE
vs. TEMPERATURE
1.0
ISINK = 4mA
0.8
0.6
0.4
VCC1 = +3V
VCC1 = +4.5V (MAX3535E)
0.2
0
-40
VCC1 = +5V
-15 10 35 60
TEMPERATURE (°C)
85
DRIVER-OUTPUT HIGH VOLTAGE
vs. DRIVER SOURCE CURRENT
5
DE = HIGH
4
3
2
1 VCC2 = +3.13V
0 (MAX3535E)
-1
-2
-3
-4 VCC2 = +7.5V
-5
-6
VCC2 = +3.9V
(MAX3535E)
-7
0 20 40 60 80 100 120
DRIVER SOURCE CURRENT (mA)
RECEIVER OUTPUT (RO1) VOLTAGE
vs. LOAD CURRENT
5
OUTPUT HIGH, SOURCING
4
3
2
1
OUTPUT LOW, SINKING
0
0 5 10
LOAD CURRENT (mA)
15
RECEIVER-OUTPUT (RO1) HIGH VOLTAGE
vs. TEMPERATURE
5.0
4.5 VCC1 = +5V
4.0 VCC1 = +4.5V
3.5
3.0
2.5 VCC1 = +3V
(MAX3535E)
2.0
-40
-15
10
ISOURCE = 4mA
35 60 85
TEMPERATURE (°C)
12
11
10
9
8
7
6
5
4
3
2
1
0
0
DRIVER-OUTPUT LOW VOLTAGE
vs. DRIVER SINK CURRENT
DE = HIGH
VCC2 = +3.9V
(MAX3535E)
VCC2 = +3.13V
(MAX3535E)
VCC2 = +7.5V
20 40 60 80 100 120
DRIVER SINK CURRENT (mA)
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
5
RL = 27Ω
SLO = GND2
4
VCC2 = +7.5V
VCC2 = +6V
3
2
1
VCC2 = +3.13V
(MAX3535E)
FIGURE 1
0
-40 -15
10 35
TEMPERATURE (°C)
60
85
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. DIFFERENTIAL OUTPUT CURRENT
4.0
DE = HIGH
3.5
3.0 VCC2 = +3.9V
(MAX3535E)
2.5
2.0
1.5
VCC2 = +3.13V
(MAX3535E)
1.0
VCC2 = +7.5V
0.5
0
0 20 40 60 80 100 120
DRIVER DIFFERENTIAL OUTPUT CURRENT (mA)
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. VCC2 SUPPLY VOLTAGE
2.8
RL = 27Ω
2.6
2.4
2.2
2.0
1.8
FIGURE 1
1.6
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
VCC2 (V)
ICC1 SUPPLY CURRENT
vs. VCC1 SUPPLY VOLTAGE
10
9
RL = OPEN
TRANSFORMER IS NOT DRIVEN
8
7
6
5
4
3
2
1
0
3.0
3.5 4.0 4.5 5.0
VCC1 SUPPLY VOLTAGE (V)
5.5
Maxim Integrated
11
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet MAX3535E.PDF ] | |
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