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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX488E Datasheet

RS-485/RS-422 Transceivers

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AVAILABLE
MAX481E/MAX483E/MAX485E/
MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
General Description
The MAX481E, MAX483E, MAX485E, MAX487E–
MAX491E, and MAX1487E are low-power transceivers for
RS-485 and RS-422 communications in harsh environ-
ments. Each driver output and receiver input is protected
against ±15kV electro-static discharge (ESD) shocks,
without latchup. These parts contain one driver and one
receiver. The MAX483E, MAX487E, MAX488E, and
MAX489E feature reduced slew-rate drivers that minimize
EMI and reduce reflections caused by improperly termi-
nated cables, thus allowing error-free data transmission
up to 250kbps. The driver slew rates of the MAX481E,
MAX485E, MAX490E, MAX491E, and MAX1487E are not
limited, allowing them to transmit up to 2.5Mbps.
These transceivers draw as little as 120µA supply cur-
rent when unloaded or when fully loaded with disabled
drivers (see Selector Guide). Additionally, the MAX481E,
MAX483E, and MAX487E have a low-current shutdown
mode in which they consume only 0.5µA. All parts oper-
ate from a single +5V supply.
Drivers are short-circuit current limited, and are protected
against excessive power dissipation by thermal shutdown
circuitry that places their outputs into a high-impedance
state. The receiver input has a fail-safe feature that guar-
antees a logic-high output if the input is open circuit.
The MAX487E and MAX1487E feature quarter-unit-load
receiver input impedance, allowing up to 128 trans-
ceivers on the bus. The MAX488E–MAX491E are
designed for full-dupFleuxnccotmimounnaiclatDioinas,gwrhailme tshe
MAX481E, MAX483E, MAX485E, MAX487E, and
MAX1487E are designed for half-duplex applications.
For applications that are not ESD sensitive see the pin-
and function-compatible MAX481, MAX483, MAX485,
MAX487–MAX491, and MAX1487.
Applications
Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
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.
Next-Generation Device Features
For Fault-Tolerant Applications:
MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4-
Unit Load, +3.3V, RS-485 Transceiver
MAX3080–MAX3089: Fail-Safe, High-Speed
(10Mbps), Slew-Rate-Limited, RS-485/RS-422
Transceivers
For Space-Constrained Applications:
MAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,
Profibus, RS-485/RS-422 Transceivers
MAX3362: +3.3V, High-Speed, RS-485/RS-422
Transceiver in a SOT23 Package
MAX3280E–MAX3284E: ±15kV ESD-Protected,
52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422
True Fail-Safe Receivers
MAX3030E–MAX3033E: ±15kV ESD-Protected,
+3.3V, Quad RS-422 Transmitters
For Multiple Transceiver Applications:
MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,
SOT23, RS-485/RS-422 Transmitters
For Fail-Safe Applications:
MAX3440E–MAX3444E: ±15kV ESD-Protected,
±60V Fault-Protected, 10Mbps, Fail-Safe
RS-485/J1708 Transceivers
For Low-Voltage Applications:
MAX3483E/MAX3485E/MAX3486E/MAX3488E/
MAX3490E/MAX3491E: +3.3V Powered, ±15kV
ESD-Protected, 12Mbps, Slew-Rate-Limited,
True RS-485/RS-422 Transceivers
Ordering Information
PART
MAX481ECPA
MAX481ECSA
MAX481EEPA
MAX481EESA
MAX483ECPA
MAX483ECSA
MAX483EEPA
MAX483EESA
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-0410; Rev 4; 10/03


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX488E Datasheet

RS-485/RS-422 Transceivers

No Preview Available !

MAX481E/MAX483E/MAX485E/
MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply
Control
Voltage (VCC)
Input Voltage
.(.–R—..E.–..,..D..E..)........................................-.0....5..V...t.o...(.V..C...C...+...0...152VV)
Driver Input Voltage (DI).............................-0.5V to (VCC + 0.5V)
Driver Output Voltage (Y, Z; A, B) ..........................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
Receiver Output Voltage (RO)....................-0.5V to (VCC + 0.5V)
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) ..800mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
Operating Temperature Ranges
MAX4_ _C_ _/MAX1487EC_ A .............................0°C to +70°C
MAX4_ _E_ _/MAX1487EE_ A...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
Differential Driver Output (no load)
Differential Driver Output
(with load)
VOD1
VOD2
R = 50Ω (RS-422)
R = 27Ω (RS-485), Figure 8
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
ΔVOD R = 27Ω or 50Ω, Figure 8
Driver Common-Mode Output
Voltage
VOC R = 27Ω or 50Ω, Figure 8
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
Input High Voltage
Input Low Voltage
Input Current
ΔVOD
VIH
VIL
IIN1
Input Current
(A, B)
IIN2
Receiver Differential Threshold
Voltage
VTH
R = 27Ω or 50Ω, Figure 8
DE, DI, –R—E–
DE, DI, –R—E–
DE, DI, –R—E–
DE = 0V;
VCC = 0V or 5.25V,
all devices except
MAX487E/MAX1487E
MAX487E/MAX1487E,
DE = 0V, VCC = 0V or 5.25V
VIN = 12V
VIN = -7V
VIN = 12V
VIN = -7V
-7V VCM 12V
Receiver Input Hysteresis
Receiver Output High Voltage
ΔVTH
VOH
VCM = 0V
IO = -4mA, VID = 200mV
Receiver Output Low Voltage
VOL IO = 4mA, VID = -200mV
Three-State (high impedance)
Output Current at Receiver
IOZR 0.4V VO 2.4V
MIN TYP MAX UNITS
5V
2
V
1.5 5
0.2 V
3V
0.2 V
2.0 V
0.8 V
±2 µA
1.0
mA
-0.8
0.25
mA
-0.2
-0.2 0.2 V
70 mV
3.5 V
0.4 V
±1 µA
Receiver Input Resistance
-7V VCM 12V, all devices except
MAX487E/MAX1487E
RIN
-7V VCM 12V, MAX487E/MAX1487E
12
48
kΩ
kΩ
2 Maxim Integrated


Part Number MAX488E
Description RS-485/RS-422 Transceivers
Maker Maxim Integrated
Total Page 16 Pages
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