MAX3486 Maxim Integrated Products, MAX3486 Datasheet

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MAX3486

Manufacturer Part Number
MAX3486
Description
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX3483, MAX3485, MAX3486, MAX3488,
MAX3490, and MAX3491 are 3.3V, low-power trans-
ceivers for RS-485 and RS-422 communication. Each
part contains one driver and one receiver. The
MAX3483 and MAX3488 feature slew-rate-limited dri-
vers that minimize EMI and reduce reflections caused
by improperly terminated cables, allowing error-free
data transmission at data rates up to 250kbps. The par-
tially slew-rate-limited MAX3486 transmits up to
2.5Mbps. The MAX3485, MAX3490, and MAX3491
transmit at up to 10Mbps.
Drivers are short-circuit current limited and are protect-
ed 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 both
inputs are open circuit.
The MAX3488, MAX3490, and MAX3491 feature full-
duplex communication, while the MAX3483, MAX3485,
and MAX3486 are designed for half-duplex communi-
cation.
________________________Applications
19-0333; Rev 0; 12/94
______________________________________________________________Selection Table
Call toll free 1-800-998-8800 for free samples or literature.
_______________General Description
NUMBER
MAX3483
MAX3485
MAX3486
MAX3488
MAX3490
MAX3491
PART
3.3V-Powered, 10Mbps and Slew-Rate-Limited
Low-Power RS-485/RS-422 Transceivers
Telecommunications
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
GUARANTEED
DATA RATE
________________________________________________________________ Maxim Integrated Products
(Mbps)
0.25
0.25
2.5
10
10
10
VOLTAGE
3.0 to 3.6
SUPPLY
(V)
True RS-485/RS-422 Transceivers
HALF/FULL
DUPLEX
Half
Half
Half
Full
Full
Full
SLEW-RATE
Ordering Information continued at end of data sheet.
* Contact factory for for dice specifications.
____________________________Features
LIMITED
______________Ordering Information
MAX3483CPA
MAX3483CSA
MAX3483C/D
MAX3483EPA
MAX3483ESA
MAX3485CPA
MAX3485CSA
MAX3485C/D
MAX3485EPA
MAX3485ESA
Operate from a Single 3.3V Supply—
No Charge Pump!
Interoperable with +5V Logic
8ns Max Skew (MAX3485/MAX3490/MAX3491)
Slew-Rate Limited for Errorless Data Transmission
(MAX3483/MAX3488)
2nA Low-Current Shutdown Mode
(MAX3483/MAX3485/MAX3486/MAX3491)
-7V to +12V Common-Mode Input Voltage Range
Allows up to 32 Transceivers on the Bus
Full-Duplex and Half-Duplex Versions Available
Industry Standard 75176 Pinout
(MAX3483/MAX3485/MAX3486)
Current-Limiting and Thermal Shutdown for
Driver Overload Protection
Yes
Yes
Yes
No
No
No
PART
RECEIVER
ENABLE
DRIVER/
Yes
Yes
Yes
Yes
No
No
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
SHUTDOWN
CURRENT
(nA)
2
2
2
2
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
PIN-PACKAGE
COUNT
PIN
14
8
8
8
8
8
1

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MAX3486 Summary of contents

Page 1

... The receiver input has a fail-safe feature that guarantees a logic-high output if both inputs are open circuit. The MAX3488, MAX3490, and MAX3491 feature full- duplex communication, while the MAX3483, MAX3485, and MAX3486 are designed for half-duplex communi- cation. ________________________Applications Low-Power RS-485/RS-422 Transceivers Telecommunications ...

Page 2

Slew-Rate-Limited True RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ...............................................................7V CC Control Input Voltage (RE, DE) ...................................-0. Driver Input Voltage (DI) .............................................-0. Driver Output Voltage ( Z)..........................-7.5V to 12.5V ...

Page 3

... Driver Output Enable Time to High Level Driver Output Disable Time from High Level Driver Output Disable Time from Low Level Driver Output Enable Time from Shutdown to Low Level Driver Output Enable Time from Shutdown to High Level DRIVER SWITCHING CHARACTERISTICS—MAX3486 (V = 3.3V +25°C) CC ...

Page 4

... Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only C = 15pF, Figure 12, L MAX3483/MAX3485/MAX3486/MAX3491 only and V , respectively, when the DI input changes state and t ( (Z) PLH PHL ...

Page 5

Slew-Rate-Limited __________________________________________Typical Operating Characteristics (V = 3.3V +25°C, unless otherwise noted OUTPUT CURRENT vs. RECEIVER OUTPUT LOW VOLTAGE 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT LOW ...

Page 6

... Slew-Rate-Limited True RS-485/RS-422 Transceivers _____________________________Typical Operating Characteristics (continued) SUPPLY CURRENT vs. TEMPERATURE 1.2 1.1 1 0.9 0.8 0.7 -40 - TEMPERATURE (°C) ______________________________________________________________Pin Description PIN MAX3483/ MAX3488/ MAX3485/ MAX3491 MAX3490 MAX3486 — — — — — — — — — — 13, 14 — ...

Page 7

... Slew-Rate-Limited TOP VIEW GND DIP/SO Figure 1. MAX3483/MAX3485/MAX3486 Pin Configuration and Typical Operating Circuit TOP VIEW GND 4 D DIP/SO Figure 2. MAX3488/MAX3490 Pin Configuration and Typical Operating Circuit TOP VIEW N. GND GND 7 8 N.C. DIP/SO Figure 3. MAX3491 Pin Configuration and Typical Operating Circuit ...

Page 8

Slew-Rate-Limited True RS-485/RS-422 Transceivers Figure 4. Driver V and (+) Figure 6. Receiver V and GENERATOR ...

Page 9

Slew-Rate-Limited D GENERATOR (NOTE Figure 8. Driver Propagation Times 50pF L (NOTE 5) GENERATOR (NOTE Figure ...

Page 10

Slew-Rate-Limited True RS-485/RS-422 Transceivers GENERATOR (NOTE 4) 50 1.5V 0V Figure 11. Receiver Propagation Delay S3 1.5V -1.5V GENERATOR (NOTE 4) IN 1.5V t PRZH t PRSH OUT 1.5V IN 1.5V t PRHZ OUT ...

Page 11

... Information The MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/ MAX3491 are low-power transceivers for RS-485 and RS-422 communications. The MAX3483 and MAX3488 can transmit and receive at data rates up to 250kbps, the MAX3486 2.5Mbps, and the MAX3485/ MAX3490/MAX3491 10Mbps. The MAX3488/ MODE A* MAX3490/MAX3491 are full-duplex transceivers, while the MAX3483/MAX3485/MAX3486 are half-duplex ...

Page 12

Slew-Rate-Limited True RS-485/RS-422 Transceivers DI 2V/div Z 1V/div Y 1V/div 20ns/div Figure 15. MAX3485/MAX3490/MAX3491 Driver Propagation Delay DI 2V/div Z 1V/div Y 1V/div 1 s/div Figure 17. MAX3483/MAX3488 Driver Propagation Delay DI 5V/div ...

Page 13

... The receiver skew time PRLH (20ns for the MAX3483/MAX3488). The driver skew times are 8ns for the MAX3485/MAX3490/MAX3491, 11ns for the MAX3486, and typically under 100ns for the MAX3483/MAX3488. ______________________________________________________________________________________ True RS-485/RS-422 Transceivers ...

Page 14

Slew-Rate-Limited True RS-485/RS-422 Transceivers A 120 120 NOTE: RE AND DE ON MAX3491 ONLY. Figure 22. MAX3488/MAX3490/MAX3491 Full-Duplex RS-485 Network A RO 120 ...

Page 15

... Information (continued) PART TEMP. RANGE MAX3486CPA 0°C to +70°C MAX3486CSA 0°C to +70°C MAX3486C/D 0°C to +70°C MAX3486EPA -40°C to +85°C MAX3486ESA -40°C to +85°C MAX3488CPA 0°C to +70°C MAX3488CSA 0°C to +70°C MAX3488C/D 0°C to +70°C MAX3488EPA -40°C to +85°C MAX3488ESA -40° ...

Page 16

... Maxim reserves the right to change the circuitry and specifications without notice at any time. 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 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © ...

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