MAX3490ESA-T Maxim Integrated, MAX3490ESA-T Datasheet

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MAX3490ESA-T

Manufacturer Part Number
MAX3490ESA-T
Description
RS-422/RS-485 Interface IC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX3490ESA-T

Data Rate
10 Mbps
Operating Supply Voltage
3.3 V
Supply Current
1.9 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Input Voltage
3.3 V
Maximum Power Dissipation
471 mW
Number Of Drivers
1
Number Of Receivers
1
Output Current
+/- 8 mA to +/- 60 mA
Output Voltage
- 7.5 V to + 12.5 V
Product
RS-422/RS-485 Combination
Propagation Delay Time Ns
22 ns
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
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
______________________________________________________________Selection Table
_______________General Description
MAX3483
MAX3485
MAX3486
MAX3488
MAX3490
MAX3491
NUMBER
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
(Mbps)
0.25
0.25
2.5
10
10
10
Functional Diagrams
VOLTAGE
3.0 to 3.6
SUPPLY
(V)
True RS-485/RS-422 Transceivers
HALF/FULL
DUPLEX
MAX3483/MAX3485/MAX3486/
Half
Half
Half
Full
Full
Full
MAX3488/MAX3490/MAX3491
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
19-0333; Rev 0; 12/94
COUNT
PIN
14
8
8
8
8
8

Related parts for MAX3490ESA-T

MAX3490ESA-T Summary of contents

Page 1

... Pin Configurations appear at end of data sheet. MAX3488 0.25 Functional Diagrams continued at end of data sheet. MAX3490 10 UCSP is a trademark of Maxim Integrated Products, Inc. MAX3491 10 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. MAX3483/MAX3485/MAX3486/ MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers ____________________________Features Operate from a Single 3.3V Supply— ...

Page 2

... V ≤ OZR CC OUT CC -7V ≤ V ≤ 12V +25°C) A MIN TYP MAX 2.0 1.5 1.5 0.2 0.2 2.0 0.8 ±2 = 12V 1 -7V -0 12V 20 OUT = -7V -20 OUT = 12V OUT = -7V OUT -0.2 0 0.4 CC 0.4 ±1 12 UNITS µA mA µA 1 µ µA kΩ Maxim Integrated ...

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 Maxim Integrated MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers CONDITIONS ...

Page 4

... MIN TYP MAX UNITS 80 190 300 120 120 720 1400 ns 720 1400 ns Maxim Integrated ...

Page 5

... TEMPERATURE (°C) OUTPUT CURRENT vs. DRIVER OUTPUT LOW VOLTAGE 175 150 125 100 OUTPUT LOW VOLTAGE (V) Maxim Integrated MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers OUTPUT CURRENT vs. RECEIVER OUTPUT HIGH VOLTAGE -20 -18 -16 -14 -12 - 3.5 0 0.5 1.0 1.5 2.0 2.5 OUTPUT HIGH VOLTAGE (V) DRIVER OUTPUT CURRENT vs ...

Page 6

... Noninverting Receiver Input and Noninverting Driver Output A Noninverting Receiver Input B Inverting Receiver Input and Inverting Driver Output B Inverting Receiver Input Positive Supply: 3.0V ≤ N.C. No Connect—not internally connected SHUTDOWN CURRENT vs. TEMPERATURE 0 -40 - 100 TEMPERATURE (°C) FUNCTION FUNCTION ≤ 3.6V CC Maxim Integrated ...

Page 7

... GND GND 7 8 N.C. DIP/SO Figure 3. MAX3491 Pin Configuration and Typical Operating Circuit Maxim Integrated MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers GND NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH. ...

Page 8

... Figure 7. Driver Differential Output Delay and Transition Times Figure 5. Driver (+) (-) IN OUT OUT C = 15pF (NOTE 5) L 375 V -7V to +12V 375 with Varying Common-Mode Voltage OD 1.5V 1. 90% 90% 50% 50% 10% 10 Maxim Integrated = 2.0V -2.0V ...

Page 9

... GENERATOR (NOTE Figure 9. Driver Enable and Disable Times ( 50pF L (NOTE 5) GENERATOR (NOTE 4) 50 Figure 10. Driver Enable and Disable Times (t Maxim Integrated MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers OUT 15pF L OUT (NOTE ...

Page 10

... S2 CLOSED OUT OPEN IN S2 CLOSED OUT 0V 3.0V 1.5V 1. RPHL CLOSED 1.5V S2 OPEN S3 = -1. PRZL t PRSL CLOSED 1.5V S2 OPEN S3 = -1. PRLZ V CC 0.25V V OL ≤ 6.0ns Maxim Integrated CC = 50Ω. ...

Page 11

... Inputs Open 10dB/div 0Hz 500kHz/div Figure 13. Driver Output Waveform and FFT Plot of MAX3485/ MAX3490/MAX3491 Transmitting a 125kHz Signal Maxim Integrated MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers __________Applications 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 ...

Page 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 RO 2V/div 1 s/div Figure 18. MAX3483/MAX3488 Receiver Propagation Delay DI 5V/div 2V/div RO 5V/div 2 s/div Figure 20. MAX3485/MAX3490/MAX3491 System Differential Voltage at 125kHz Driving 4000 ft of Cable Maxim Integrated ...

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. Maxim Integrated MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers ...

Page 14

... 120 D Y NOTE: RE AND DE ON MAX3491 ONLY. Figure 23. Line Repeater for MAX3488/MAX3490/MAX3491 MAX3488 MAX3490 MAX3491 DATA IN DATA OUT Y 120 120 MAX3488 MAX3490 MAX3491 Maxim Integrated ...

Page 15

... 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°C to +85°C MAX3491CPD 0°C to +70°C MAX3491CSD 0°C to +70°C MAX3491C/D 0°C to +70°C MAX3491EPD -40°C to +85°C MAX3491ESD -40° ...

Page 16

... L 0.115 0.150 2.92 INCHES MILLIMETERS DIM PINS MIN MAX D 8 0.348 0.390 D 14 0.735 0.765 18. 0.745 0.765 18. 0.885 0.915 22. 1.015 1.045 25. 1.14 1.265 28.96 MAX 1.75 0.25 0.49 0.25 4.00 1.27 6.20 1.27 MIN MAX 4.80 5.00 8.55 8.75 9.80 10.00 21-0041A MAX – 5.08 – 4.45 2.03 0.56 1.65 0.30 2.03 8.26 7.87 – – – 10.16 3.81 MIN MAX 8.84 9.91 19.43 19.43 23.24 26.54 32.13 Maxim Integrated ...

Page 17

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 1994 Maxim Integrated MAX3488/MAX3490/MAX3491 True RS-485/RS-422 Transceivers The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc. 17 ...

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