MAX3488 MAXIM [Maxim Integrated Products], MAX3488 Datasheet

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MAX3488

Manufacturer Part Number
MAX3488
Description
3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
Manufacturer
MAXIM [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

Related parts for MAX3488

MAX3488 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. ...

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

Slew-Rate-Limited DC ELECTRICAL CHARACTERISTICS (continued 3.3V ±0.3V unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Supply Current Supply Current in Shutdown Mode I ...

Page 4

... Slew-Rate-Limited True RS-485/RS-422 Transceivers DRIVER SWITCHING CHARACTERISTICS—MAX3483 and MAX3488 (V = 3.3V +25° PARAMETER Driver Differential Output Delay Driver Differential Output Transition Time Driver Propagation Delay, Low-to-High Level Driver Propagation Delay, High-to-Low Level | | Driver Propagation Delay Skew (Note 2) ...

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 — — — — ...

Page 7

... 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. ...

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

... 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

... Z 1V/div Y 1V/div 1 s/div Figure 17. MAX3483/MAX3488 Driver Propagation Delay DI 5V/div 2V/div RO 5V/div 2 s/div Figure 19. MAX3483/MAX3488 System Differential Voltage at 125kHz Driving 4000 ft of Cable 12 ______________________________________________________________________________________ B 1V/div A 1V/div RO 2V/div 20ns/div Figure 16. MAX3485/MAX3490/MAX3491 Receiver Propagation Delay Driven by External RS-485 Device B 1V/div A 1V/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 B ...

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 120 120 D Y NOTE: RE AND DE ON MAX3491 ONLY. Figure 23. Line Repeater for MAX3488/MAX3490/MAX3491 14 ...

Page 15

... 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°C to +85°C MAX3490CPA 0°C to +70°C MAX3490CSA 0°C to +70°C MAX3490C/D 0°C to +70°C MAX3490EPA -40°C to +85°C MAX3490ESA -40° ...

Page 16

Slew-Rate-Limited True RS-485/RS-422 Transceivers ________________________________________________________Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. ...

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