MAX481CPA-MAX481CSA Fast Delivery |IC PHOENIX CO.,LIMITED

MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsMAX491, and MAX1487 are not limited, allowing them toMAX3460–MAX3464: +5V, Fail-Safe, 2 ..
MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationscations are obtained using the MAX488–MAX491, whileMAX3080–MAX3089: Fail-Safe, High-Spe ..
MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX481CSA ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsMAX1487 are low-power transceivers for RS-485 and RS-MAX3430: ±80V Fault-Protected, Fai ..
MAX481CSA+ ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsMAX491, and MAX1487 are not limited, allowing them toMAX3460–MAX3464: +5V, Fail-Safe, 2 ..
MAX481CSA+T ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-LimitedRS-485/RS-422 Transceivers
MAX8878EUK29 ,Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
MAX8878EUK29+T ,Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
MAX8878EUK29-T ,Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
MAX8878EUK30+T ,Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
MAX8878EUK33 ,Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
MAX8878EUK33 ,Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout

MAX481CPA-MAX481CSA
Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
General Description
The MAX481, MAX483, MAX485, MAX487–MAX491, and
MAX1487 are low-power transceivers for RS-485 and RS-
422 communication. Each part contains one driver and one
receiver. The MAX483, MAX487, MAX488, and MAX489
feature reduced slew-rate drivers that minimize EMI and
reduce reflections caused by improperly terminated cables,
thus allowing error-free data transmission up to 250kbps.
The driver slew rates of the MAX481, MAX485, MAX490,
MAX491, and MAX1487 are not limited, allowing them to
transmit up to 2.5Mbps.
These transceivers draw between 120µA and 500µA of
supply current when unloaded or fully loaded with disabled
drivers. Additionally, the MAX481, MAX483, and MAX487
have a low-current shutdown mode in which they consume
only 0.1µA. All parts operate from a single 5V supply.
Drivers are short-circuit current limited and are protected
against excessive power dissipation by thermal shutdown
circuitry that places the driver outputs into a high-imped-
ance state. The receiver input has a fail-safe feature that
guarantees a logic-high output if the input is open circuit.
The MAX487 and MAX1487 feature quarter-unit-load
receiver input impedance, allowing up to 128 MAX487/
MAX1487 transceivers on the bus. Full-duplex communi-
cations are obtained using the MAX488–MAX491, while
the MAX481, MAX483, MAX485, MAX487, and MAX1487
are designed for half-duplex applications.
________________________Applications
Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
__Next Generation Device FeaturesFor Fault-Tolerant Applications
MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4
Unit Load, +3.3V, RS-485 Transceiver
MAX3440E–MAX3444E: ±15kV ESD-Protected,
±60V Fault-Protected, 10Mbps, Fail-Safe,
RS-485/J1708 TransceiversFor 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
MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,
SOT23, RS-855/RS-422 TransmittersFor Multiple Transceiver Applications
MAX3030E–MAX3033E: ±15kV ESD-Protected,
+3.3V, Quad RS-422 TransmittersFor Fail-Safe Applications
MAX3080–MAX3089: Fail-Safe, High-Speed
(10Mbps), Slew-Rate-Limited RS-485/RS-422
TransceiversFor 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
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
______________________________________________________________Selection Table
19-0122; Rev 8; 10/03
Ordering Information appears at end of data sheet.
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC).............................................................12V
Control Input Voltage (RE, DE)...................-0.5V to (VCC+ 0.5V)
Driver Input Voltage (DI).............................-0.5V to (VCC+ 0.5V)
Driver Output Voltage (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
8-Pin µMAX (derate 4.1mW/°C above +70°C)..............830mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW
14-Pin CERDIP (derate 9.09mW/°C above +70°C).......727mW
Operating Temperature Ranges
MAX4_ _C_ _/MAX1487C_ A...............................0°C to +70°C
MAX4__E_ _/MAX1487E_ A.............................-40°C to +85°C
MAX4__MJ_/MAX1487MJA...........................-55°C to +125°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
DC ELECTRICAL CHARACTERISTICS
(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
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.
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487
(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX483, MAX487/MAX488/MAX489
(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued)
(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
__________________________________________Typical Operating Characteristics
(VCC= 5V, TA = +25°C, unless otherwise noted.)
NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICS
Note 1:All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device
ground unless otherwise specified.
Note 2:All typical specifications are given for VCC= 5V and TA= +25°C.
Note 3:Supply current specification is valid for loaded transmitters when DE = 0V.
Note 4:Applies to peak current. See Typical Operating Characteristics.
Note 5:The MAX481/MAX483/MAX487 are put into shutdown by bringingREhigh and DE low. If the inputs are in this state for less
than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are
guaranteed to have entered shutdown. See Low-Power Shutdown Modesection.
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
____________________________Typical Operating Characteristics (continued)
(VCC= 5V, TA = +25°C, unless otherwise noted.)
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
______________________________________________________________Pin Description
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
__________Applications Information
The MAX481/MAX483/MAX485/MAX487–MAX491 and
MAX1487 are low-power transceivers for RS-485 and RS-
422 communications. The MAX481, MAX485, MAX490,
MAX491, and MAX1487 can transmit and receive at data
rates up to 2.5Mbps, while the MAX483, MAX487,
MAX488, and MAX489 are specified for data rates up to
250kbps. The MAX488–MAX491 are full-duplex trans-
ceivers while the MAX481, MAX483, MAX485, MAX487,
and MAX1487 are half-duplex. In addition, Driver Enable
(DE) and Receiver Enable (RE) pins are included on the
MAX481, MAX483, MAX485, MAX487, MAX489,
MAX491, and MAX1487. When disabled, the driver and
receiver outputs are high impedance.
MAX487/MAX1487:
128 Transceivers on the Bus
The 48kΩ, 1/4-unit-load receiver input impedance of the
MAX487 and MAX1487 allows up to 128 transceivers
on a bus, compared to the 1-unit load (12kΩinput
impedance) of standard RS-485 drivers (32 trans-
ceivers maximum). Any combination of MAX487/
MAX1487 and other RS-485 transceivers with a total of
32 unit loads or less can be put on the bus. The
MAX481/MAX483/MAX485 and MAX488–MAX491 have
standard 12kΩReceiver Input impedance.
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
Figure 2. MAX488/MAX490 Pin Configuration and Typical Operating Circuit
Figure 3. MAX489/MAX491 Pin Configuration and Typical Operating Circuit
MAX483/MAX487/MAX488/MAX489:
Reduced EMI and Reflections
The MAX483 and MAX487–MAX489 are slew-rate limit-
ed, minimizing EMI and reducing reflections caused by
improperly terminated cables. Figure 12 shows the dri-
ver output waveform and its Fourier analysis of a
150kHz signal transmitted by a MAX481, MAX485,
MAX490, MAX491, or MAX1487. High-frequency har-
monics with large amplitudes are evident. Figure 13
shows the same information displayed for a MAX483,
MAX487, MAX488, or MAX489 transmitting under the
same conditions. Figure 13’s high-frequency harmonics
have much lower amplitudes, and the potential for EMI
is significantly reduced.
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
_________________________________________________________________Test Circuits
Figure 4. Driver DC Test LoadFigure 5. Receiver Timing Test Load
Figure 6. Driver/Receiver Timing Test CircuitFigure 7. Driver Timing Test Load
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
_______________________________________________________Switching Waveforms
_________________Function Tables (MAX481/MAX483/MAX485/MAX487/MAX1487)
Figure 8. Driver Propagation DelaysFigure 9. Driver Enable and Disable Times (except MAX488 and
MAX490)
Figure 10. Receiver Propagation DelaysFigure 11. Receiver Enable and Disable Times (except MAX488
and MAX490)
Table 1. TransmittingTable 2. Receiving

Partno	Mfg	Dc	Qty	Available	Descript
MAX481CPA	MAXIM	N/a	412	avai	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CPA	MAXIM ?	N/a	58	avai	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CPA	MAX	N/a	4500	avai	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CSA	MAXIM	N/a	243	avai	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CSA	MAX	N/a	4500	avai	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CSA	MAXIM ?	N/a	12	avai	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX481CSA	MAXIM,MAXIM	N/a	25000	avai	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers