MAX1484EUB+ Maxim Integrated Products, MAX1484EUB+ Datasheet

IC TXRX RS485/RS422 10-UMAX

MAX1484EUB+

Manufacturer Part Number
MAX1484EUB+
Description
IC TXRX RS485/RS422 10-UMAX
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet
1.MAX1481CUB.pdf (16 pages)

Specifications of MAX1484EUB+

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
The MAX1481/MAX1484/MAX1485/MAX1486 provide
software-selectable, half-/full-duplex, low-power, slew-
rate-limited, and high-speed (12Mbps) RS-485/RS-422
operation in a 10-pin µMAX
lest 10-pin package available.
The software-selectable, half-/full-duplex MAX1485/
MAX1486 make obsolete the normally larger and more
expensive solutions required for selectable half-/full-
duplex RS-485/RS-422 operation: 1) a 14-pin, full-
duplex transceiver configured via jumpers between
receiver and transmitter lines, or 2) two 8-pin, half-
duplex transceivers, which require an additional invert-
er logic gate for software selectability.
The MAX1481/MAX1484 are functionally equivalent to
the industry-standard MAX491 and 75180, and are
designed for space-constrained, full-duplex RS-422
applications.
All parts contain one driver and one receiver and fea-
ture a 1/8-unit-load receiver input impedance, allowing
up to 256 transceivers on the bus. The MAX1481/
MAX1485 feature reduced-slew-rate drivers that mini-
mize EMI and reduce reflections caused by improperly
terminated cables, allowing error-free data transmission
up to 250kbps. The MAX1484/MAX1486 driver slew
rates are not limited, allowing them to transmit up to
12Mbps.
The MAX1481/MAX1484/MAX1485/MAX1486 draw only
300µA of supply current. The MAX1481 has a low-power
shutdown mode that reduces supply current to only
0.1µA. All devices operate from a single 5V supply.
Drivers are output short-circuit current limited and are
protected against excessive power dissipation by
thermal-shutdown circuitry that places the driver outputs
into a high-impedance state. The receiver input has a fail-
safe feature that guarantees a logic-high output if the
input is open circuit.
19-1312; Rev 1; 3/06
______________________________________________________________Selection Table
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
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.
_______________General Description
MAX1481
MAX1484
MAX1485
MAX1486
Part
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
Selectable
Selectable
Half/Full
Duplex
Full
Full
________________________________________________________________ Maxim Integrated Products
________________________________________________________________ Maxim Integrated Products
(Mbps)
0.250
0.250
Data
Rate
12
12
®
package—the smal-
Limited
Slew-
Rate
Yes
Yes
No
No
Shutdown
Power
Low-
Yes
No
No
No
Enable
Driver
Yes
Yes
Yes
Yes
____________________________Features
________________________Applications
______________Ordering Information
MAX1481CUB
MAX1481EUB
MAX1484CUB
MAX1484EUB
MAX1485CUB
MAX1485EUB
MAX1486CUB
MAX1486EUB
10-Pin µMAX Package: Smallest 10-Pin Package
Software-Selectable Half-/Full-Duplex Operation
(MAX1485/MAX1486)
0.1µA Low-Current Shutdown Mode (MAX1481)
Slew-Rate Limiting Allows Error-Free Data
Transmission (MAX1481/MAX1485)
12Mbps High-Speed Operation
(MAX1484/MAX1486)
Allow up to 256 Transceivers on the Bus
Low-Power RS-422/RS-485 Communications
Level Translators
Hand-Held Equipment
Battery-Powered Equipment
Transceiver for EMI-Sensitive Applications
Industrial-Control Local Area Networks
µMAX is a registered trademark of Maxim Integrated Products, Inc.
PART
Receiver
Enable
Yes
Yes
No
No
Quiescent
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Current
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
(µA)
300
300
300
300
Transceivers
on Bus
256
256
256
256
PIN-PACKAGE
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
Package
Pin-
1
1

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MAX1484EUB+ Summary of contents

Page 1

... MAX1485CUB MAX1485EUB MAX1486CUB MAX1486EUB ________________________Applications Low-Power RS-422/RS-485 Communications Level Translators Hand-Held Equipment Battery-Powered Equipment Transceiver for EMI-Sensitive Applications Industrial-Control Local Area Networks µMAX is a registered trademark of Maxim Integrated Products, Inc. Slew- Low- Driver Rate Power Enable Limited Shutdown Yes Yes Yes ...

Page 2

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ............................................................+7V CC Control Input Voltage (RE, DE, H/F) ...........-0. Driver Input Voltage (DI).............................-0. Driver Output Voltage ( ...

Page 3

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package ELECTRICAL CHARACTERISTICS (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL RECEIVER Receiver Differential Threshold ...

Page 4

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package SWITCHING CHARACTERISTICS (MAX1481/MAX1485) (continued ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL t DPLH Driver ...

Page 5

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package __________________________________________Typical Operating Characteristics (V = +5V +25°C, unless otherwise noted NO-LOAD SUPPLY CURRENT vs. TEMPERATURE 360 MAX1481/MAX1485 340 320 300 280 MAX1484/MAX1486 260 240 220 -60 -40 ...

Page 6

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package _________________________________Typical Operating Characteristics (continued +5V +25°C, unless otherwise noted MAX1484/MAX1486 DRIVER PROPAGATION DELAY vs. TEMPERATURE DIFF ...

Page 7

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package ______________________________________________________________Pin Description PIN PIN MAX1485/MAX1486 MAX1481/ MAX1484 H H — — — ...

Page 8

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package _____________________________________________________________Function Tables MAX1481 TRANSMITTING INPUTS High-Z and Shutdown MAX1484 TRANSMITTING INPUTS ...

Page 9

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package TOP VIEW MAX1481 MAX1484 GND MAX Figure 1. MAX1481/MAX1484 Pin Configuration and ...

Page 10

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package V CC MAX1485 MAX1486 H/F GND Figure 4. MAX1485/MAX1486 Functional Diagram _______________Detailed Description The MAX1481/MAX1484/MAX1485/MAX1486 high- speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. The ...

Page 11

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package Figure 5. Driver DC Test Load Figure 7. Driver Timing Test Circuit DPLH ...

Page 12

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package 1.5V V OUTPUT PHL PLH 1V A -1V B INPUT Figure 11. Receiver Propagation Delays V ATE ID Figure 13. Receiver Propagation Delay Test Circuit ...

Page 13

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package 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, use the repeater application shown in Figure 16. Figures ...

Page 14

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package 5V V H/F 120Ω MAX1485 MAX1486 Figure 19. Typical Half-Duplex RS-485 Network 14 ______________________________________________________________________________________ H ...

Page 15

Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in µMAX Package A 120 120 H/F *RE ON MAX1481 AND MAX1484 ONLY. **H/F ON MAX1485 AND MAX1486 ONLY. Figure 20. Typical ...

Page 16

... 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products PrintedSA is a registered trademark of Maxim Integrated Products, Inc ...

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