MAX3485EESA Maxim Integrated Products, MAX3485EESA Datasheet

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MAX3485EESA

Manufacturer Part Number
MAX3485EESA
Description
Manufacturer
Maxim Integrated Products
Datasheet

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Devices in the MAX3483E family (MAX3483E/MAX3485E/
MAX3486E/MAX3488E/MAX3490E/MAX3491E) are
±15kV ESD-protected, +3.3V, low-power transceivers for
RS-485 and RS-422 communications. Each device con-
tains one driver and one receiver. The MAX3483E and
MAX3488E feature slew-rate-limited drivers that minimize
EMI and reduce reflections caused by improperly termi-
nated cables, allowing error-free data transmission at
data rates up to 250kbps. The partially slew-rate-limited
MAX3486E transmits up to 2.5Mbps. The MAX3485E,
MAX3490E, and MAX3491E transmit at up to 12Mbps.
All devices feature enhanced electrostatic discharge
(ESD) protection. All transmitter outputs and receiver
inputs are protected to ±15kV using IEC 1000-4-2 Air-
Gap Discharge, ±8kV using IEC 1000-4-2 Contact
Discharge, and ±15kV using the Human Body Model.
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 MAX3488E, MAX3490E, and MAX3491E feature
full-duplex communication, while the MAX3483E,
MAX3485E, and MAX3486E are designed for half-
duplex communication.
19-1474; Rev 0; 4/99
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Slew-Rate-Limited True RS-485/RS-422 Transceivers
MAX3483E
MAX3485E
MAX3486E
MAX3488E
MAX3490E
MAX3491E
NUMBER
PART
3.3V-Powered, ±15kV ESD-Protected, 12Mbps and
Telecommunications
Industrial-Control Local Area Networks
Transceivers for EMI-Sensitive Applications
Integrated Services Digital Networks
Packet Switching
GUARANTEED
DATA RATE
________________________________________________________________ Maxim Integrated Products
(Mbps)
0.25
0.25
2.5
12
12
12
General Description
VOLTAGE
3.0 to 3.6
SUPPLY
Applications
(V)
HALF/FULL
DUPLEX
Half
Half
Half
Full
Full
Full
SLEW-RATE
LIMITED
Yes
Yes
Yes
No
No
No
Ordering Information continued at end of data sheet.
MAX3483ECSA
MAX3483ECPA
MAX3483EESA
MAX3483EEPA
MAX3485ECSA
MAX3485ECPA
MAX3485EESA
MAX3485EEPA
ESD Protection for RS-485 I/O Pins
Operate from a Single +3.3V Supply—
No Charge Pump Required
Interoperable with +5V Logic
Guaranteed 12Mbps Data Rate
(MAX3485E/MAX3490E/MAX3491E)
Slew-Rate Limited for Errorless Data Transmission
(MAX3483E/MAX3488E)
2nA Low-Current Shutdown Mode
(MAX3483E/MAX3485E/MAX3486E/MAX3491E)
-7V to +12V Common-Mode Input Voltage Range
Full-Duplex and Half-Duplex Versions Available
Industry-Standard 75176 Pinout
(MAX3483E/MAX3485E/MAX3486E)
Current-Limiting and Thermal Shutdown for
Driver Overload Protection
±15kV—Human Body Model
±8kV—IEC 1000-4-2, Contact Discharge
±15kV—IEC 1000-4-2, Air-Gap Discharge
PART
RECEIVER
DRIVER/
ENABLE
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
SHUTDOWN
TEMP. RANGE
CURRENT
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
(nA)
2
2
2
2
Selector Guide
PROTECTION
±15kV
ESD
Yes
Yes
Yes
Yes
Yes
Yes
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
PIN-PACKAGE
Features
COUNT
PIN
14
8
8
8
8
8
1

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MAX3485EESA Summary of contents

Page 1

... Full-Duplex and Half-Duplex Versions Available Industry-Standard 75176 Pinout (MAX3483E/MAX3485E/MAX3486E) Current-Limiting and Thermal Shutdown for Driver Overload Protection PART MAX3483ECSA MAX3483ECPA MAX3483EESA MAX3483EEPA MAX3485ECSA MAX3485ECPA MAX3485EESA MAX3485EEPA Ordering Information continued at end of data sheet. DRIVER/ HALF/FULL SLEW-RATE RECEIVER DUPLEX LIMITED ENABLE Half Yes ...

Page 2

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ).............................................................+7V CC Control Input Voltage (RE, DE).................................-0.3V to +7V Driver Input Voltage (DI)...........................................-0.3V to +7V Driver Output Voltage ( .......................-7.5V to +12.5V ...

Page 3

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers DC ELECTRICAL CHARACTERISTICS (continued +3.3V ±0.3V MIN MAX PARAMETER Driver Short-Circuit Output Current Receiver Short-Circuit Output Current ESD Protection for Y, Z, ...

Page 4

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers DRIVER SWITCHING CHARACTERISTICS—MAX3483E/MAX3488E (V = +3.3V +25°C PARAMETER Maximum Data Rate Driver Differential Output Delay Driver Differential Output Transition Time Driver Propagation Delay, Low-to-High Level Driver Propagation ...

Page 5

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers (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 ...

Page 6

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers (V = +3.3V +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 1 DON’T CARE 1 1 ...

Page 7

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers TOP VIEW GND SO/DIP Figure 1. MAX3483E/MAX3485E/MAX3486E Pin Configuration and Typical Operating Circuit ...

Page 8

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers Figure 4. Driver V and (+) Figure 6. Receiver V and ...

Page 9

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers S1 D GENERATOR (NOTE Figure 8. Driver Propagation Times 50pF L (NOTE ...

Page 10

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers GENERATOR (NOTE 4) 50 1.5V 0 Figure 11. Receiver Propagation Delay S3 1.5V -1.5V V GENERATOR (NOTE 4) IN 1.5V t PRZH t PRSH OUT 1.5V IN 1.5V ...

Page 11

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers _____________________Function Tables Devices with Receiver/Driver Enable (MAX3483E/MAX3485E/MAX3486E/MAX3491E) Table 1. Transmitting INPUTS OUTPUTS High-Z High ...

Page 12

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers DI 2V/div Z 1V/div Y 1V/div 20ns/div Figure 15. MAX3485E/MAX3490E/MAX3491E Driver Propagation Delay DI 2V/div Z 1V/div Y 1V/div 1 s/div Figure 17. MAX3483E/MAX3488E Driver Propagation Delay DI 5V/div V - ...

Page 13

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers Driver-Output Protection Excessive output current and power dissipation caused by faults or by bus contention are prevented by two mechanisms. A foldback current limit on the output stage provides immediate protection ...

Page 14

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers 1500 DISCHARGE CHARGE-CURRENT RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 22a. Human Body ESD Test Model ...

Page 15

ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers 120 MAX3483E MAX3485E MAX3486E Figure 24. MAX3483E/MAX3485E/MAX3486E Typical RS-485 Network A 120 120 ...

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 © 1999 Maxim Integrated Products PIN-PACKAGE ...

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