MAX487CUA+T Maxim Integrated Products, MAX487CUA+T Datasheet

IC TXRX RS485/RS422 8-UMAX

MAX487CUA+T

Manufacturer Part Number
MAX487CUA+T
Description
IC TXRX RS485/RS422 8-UMAX
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet

Specifications of MAX487CUA+T

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
______________________________________________________________Selection Table
19-0122; Rev 9; 9/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX1487
NUMBER
MAX481
MAX483
MAX485
MAX487
MAX488
MAX489
MAX490
MAX491
PART
Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
HALF/FULL
DUPLEX
Half
Half
Half
Half
Half
Full
Full
Full
Full
________________________________________________________________ Maxim Integrated Products
General Description
(Mbps)
DATA
RATE
0.25
0.25
0.25
0.25
2.5
2.5
2.5
2.5
2.5
SLEW-RATE
LIMITED
Yes
Yes
Yes
Yes
No
No
No
No
No
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
SHUTDOWN
POWER
LOW-
Yes
Yes
Yes
No
No
No
No
No
No
♦ ♦ For Fault-Tolerant Applications
♦ ♦ For Space-Constrained Applications
♦ ♦ For Multiple Transceiver Applications
♦ ♦ For Fail-Safe Applications
♦ ♦ For Low-Voltage Applications
Ordering Information appears at end of data sheet.
__Next Generation Device Features
RECEIVER/
ENABLE
DRIVER
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 Transceivers
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-485/RS-422 Transmitters
MAX3030E–MAX3033E: ±15kV ESD-Protected,
+3.3V, Quad RS-422 Transmitters
MAX3080–MAX3089: Fail-Safe, High-Speed
(10Mbps), Slew-Rate-Limited RS-485/RS-422
Transceivers
MAX3483E/MAX3485E/MAX3486E/MAX3488E/
MAX3490E/MAX3491E: +3.3V Powered, ±15kV
ESD-Protected, 12Mbps, Slew-Rate-Limited,
True RS-485/RS-422 Transceivers
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
QUIESCENT
CURRENT
(μA)
300
120
300
120
120
120
300
300
230
RECEIVERS ON
NUMBER OF
BUS
128
128
32
32
32
32
32
32
32
COUNT
PIN
14
14
8
8
8
8
8
8
8
1

Related parts for MAX487CUA+T

MAX487CUA+T Summary of contents

Page 1

... MAX491 Full 2.5 MAX1487 Half 2.5 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers __Next Generation Device Features ♦ ♦ For Fault-Tolerant Applications MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4 Unit Load, +3.3V, RS-485 Transceiver MAX3440E– ...

Page 2

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) .............................................................12V CC Control Input Voltage (RE, DE)...................-0. Driver Input Voltage (DI).............................-0. Driver Output Voltage (A, B)...................................-8V to +12.5V Receiver Input Voltage (A, B).................................-8V to +12.5V ...

Page 3

DC ELECTRICAL CHARACTERISTICS (continued ±5 unless otherwise noted.) (Notes MIN MAX CC PARAMETER SYMBOL No-Load Supply Current I CC (Note 3) Supply Current in Shutdown I SHDN Driver ...

Page 4

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued ±5 unless otherwise noted.) (Notes MIN MAX CC PARAMETER SYMBOL Driver Enable from Shutdown to t ZH(SHDN) Output High ...

Page 5

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 V ...

Page 6

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers ____________________________Typical Operating Characteristics (continued 5V +25°C, unless otherwise noted OUTPUT CURRENT vs. DRIVER OUTPUT LOW VOLTAGE 140 120 100 ...

Page 7

Description PIN MAX481/MAX483/ MAX488/ MAX485/MAX487/ MAX490 MAX1487 DIP/SO µMAX DIP/SO µMAX — — — — — — — — ...

Page 8

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers TOP VIEW GND DIP/ MAX488 MAX490 GND ...

Page 9

Circuits Figure 4. Driver DC Test Load DIFF Figure 6. Driver/Receiver Timing Test Circuit MAX483/MAX487/MAX488/MAX489: Reduced EMI and Reflections ...

Page 10

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers _______________________________________________________Switching Waveforms PLH PHL 1 ( (Z) DIFF DIFF 90 ...

Page 11

Figure 12. Driver Output Waveform and FFT Plot of MAX481/ MAX485/MAX490/MAX491/MAX1487 Transmitting a 150kHz Signal Low-Power Shutdown Mode (MAX481/MAX483/MAX487) A low-power shutdown mode is initiated by bringing both RE high and DE low. The devices will not ...

Page 12

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers Figure 14. Receiver Propagation Delay Test Circuit 500mV/div 2V/div 20ns/div Figure 15. MAX481/MAX485/MAX490/MAX491/MAX1487 Receiver t PHL A 500mV/div B RO 2V/div 400ns/div Figure 17. MAX483, MAX487–MAX489 Receiver t 12 ...

Page 13

Line Length vs. Data Rate The RS-485/RS-422 standard covers line lengths up to 4000 feet. For line lengths greater than 4000 feet, see Figure 23. Figures 19 and 20 show the system differential voltage for the parts driving 4000 feet ...

Page 14

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers A 120Ω 120Ω NOTE: RE AND DE ON MAX489/MAX491 ONLY. Figure 22. MAX488–MAX491 Full-Duplex RS-485 Network MAX488–MAX491 A RO 120Ω ...

Page 15

Information PART TEMP. RANGE CPA 0°C to +70°C MAX481CSA 0°C to +70°C MAX481CUA 0°C to +70°C MAX481C/D 0°C to +70°C MAX481EPA -40°C to +85°C MAX481ESA -40°C to ...

Page 16

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers _____________________________________________Chip Topographies (continued) MAX488/MAX490 N.C. N.C. DI GND 0.080" (2.032mm) For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code ...

Page 17

... 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 ____________________ 17 © 2009 Maxim Integrated Products ...

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