MAX3082E Maxim Integrated Products, MAX3082E Datasheet

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MAX3082E

Manufacturer Part Number
MAX3082E
Description
Manufacturer
Maxim Integrated Products
Datasheet

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*Pin compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.
19-1800; Rev 0; 9/00
±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps),
The MAX3080E–MAX3089E are ±15kV electrostatic dis-
charge (ESD)-protected, high-speed transceivers for RS-
485/RS-422 communication that contain one driver and
one receiver. These devices feature fail-safe circuitry,
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This means that the
receiver output will be a logic high if all transmitters on a
terminated bus are disabled (high impedance). The
MAX3080E/MAX3081E/MAX3082E feature reduced
slew-rate drivers that minimize EMI and reduce reflec-
tions caused by improperly terminated cables, allowing
error-free data transmission up to 115kbps. The
MAX3083E/MAX3084E/MAX3085E offer higher driver
output slew-rate limits, allowing transmit speeds up to
500kbps. The MAX3086E/MAX3087E/ MAX3088Es’ dri-
ver slew rates are not limited, making transmit speeds
up to 10Mbps possible. The MAX3089E’s slew rate is
selectable between 115kbps, 500kbps, and 10Mbps by
driving a selector pin with a single three-state driver. All
devices feature enhanced ESD protection. All transmitter
outputs and receiver inputs are protected to ±15kV
using the Human Body Model.
These transceivers typically draw 375µA of supply
current when unloaded, or when fully loaded with the dri-
vers disabled.
All devices have a 1/8-unit-load receiver input impedance
that allows up to 256 transceivers on the bus. The
MAX3082E/MAX3085E/MAX3088E are intended for half-
duplex communications, while the MAX3080E/MAX3081E/
MAX3083E/MAX3084E/MAX3086E/MAX3087E are
intended for full-duplex communications. The MAX3089E
is selectable between half-duplex and full-duplex opera-
tion. It also features independently programmable
receiver and transmitter output phase via separate pins.
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX3080E
MAX3081E
MAX3082E
MAX3083E
MAX3084E
MAX3085E
MAX3086E
MAX3087E
MAX3088E
MAX3089E
Part
Slew-Rate-Limited RS-485/RS-422 Transceivers
Selectable
Half/Full
Duplex
Half
Half
Half
Full
Full
Full
Full
Full
Full
________________________________________________________________ Maxim Integrated Products
General Description
Selectable
(Mbps)
0.115
0.115
0.115
Data
Rate
0.5
0.5
0.5
10
10
10
Selectable
Limited
Slew-
Rate
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Shutdown
Power
Low-
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
o ESD Protection for RS-485 I/O Pins
o True Fail-Safe Receiver While Maintaining
o Enhanced Slew-Rate Limiting Facilitates
o 1nA Low-Current Shutdown Mode (Except
o Pin-Selectable Full/Half-Duplex Operation
o Phase Controls to Correct for Twisted-Pair
o Allow Up to 256 Transceivers on the Bus
Ordering Information continued at end of data sheet.
Receiver/
Enable
MAX3080ECSD
MAX3080ECPD
MAX3080EESD
MAX3080EEPD
Driver
EIA/TIA-485 Compatibility
Error-Free Data Transmission
(MAX3080E–MAX3085E/MAX3089E)
MAX3081E/MAX3084E/MAX3087E)
(MAX3089E)
Reversal (MAX3089E)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
±15kV, Human Body Model
PART
RS-422/RS-485 Communications
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Quiescent
Current
(µA)
375
375
375
375
375
375
375
375
375
375
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
Transceivers
Ordering Information
Bus (µA)
256
256
256
256
256
256
256
256
256
256
On
Selector Guide
Applications
Count
Pin
14 SO
14 Plastic DIP
14 SO
14 Plastic DIP
14
14
14
14
PIN-PACKAGE
8
8
8
8
8
8
Features
Standard
Industry-
Pinout
75180*
75180
75179
75176
75180
75179
75176
75180
75179
75176
1

Related parts for MAX3082E

MAX3082E Summary of contents

Page 1

... All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The MAX3082E/MAX3085E/MAX3088E are intended for half- duplex communications, while the MAX3080E/MAX3081E/ MAX3083E/MAX3084E/MAX3086E/MAX3087E are intended for full-duplex communications. The MAX3089E is selectable between half-duplex and full-duplex opera- tion ...

Page 2

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ............................................................+7V CC Control Input Voltage (RE, DE)...................-0. Special Input Voltage (H/F, SRL, TXP, RXP)..............................-0. Driver Input Voltage (DI).............................-0. Driver ...

Page 3

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers DC ELECTRICAL CHARACTERISTICS (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL RECEIVER Receiver Differential Threshold ...

Page 4

... ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX3080E/MAX3081E/MAX3082E, and MAX3089E with SRL = Unconnected (V = +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL t DPLH Driver Input-to-Output t DPHL Driver Output Skew t DSKEW DPLH DPHL Driver Rise or Fall Time ...

Page 5

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX3083E/MAX3084E/MAX3085E, and MAX3089E with SRL = +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER ...

Page 6

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX3086E/MAX3087E/MAX3088E, and MAX3089E with SRL = GND (V = +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ...

Page 7

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers (V = +5V +25°C, unless otherwise noted NO-LOAD SUPPLY CURRENT vs. TEMPERATURE 525 A: MAX3086E/MAX3087E/MAX3088E, 500 MAX3089E WITH SRL = GND 475 450 A ...

Page 8

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers (V = +5V +25°C, unless otherwise noted DRIVER PROPAGATION DELAY (500kbps MODE) vs. TEMPERATURE 920 R = 54Ω 880 t 840 800 760 720 680 640 600 560 ...

Page 9

... MAX3083E/MAX3084E/MAX3085E AND MAX3089E WITH SRL = 500ns/div _______________________________________________________________________________________ Typical Operating Characteristics (continued) MAX3080/3089 TYP-18 2V/div V 5V/div DRIVER PROPAGATION DELAY MAX3080E/MAX3081E/MAX3082E AND MAX3089E WITH SRL = OPEN MAX3080/3089 TYP- 2µs/div MAX3080/3089 TYP-21 5V/div V 2.5V/div Y RECEIVER PROPAGATION DELAY MAX3080E–MAX3085E AND MAX3089E WITH SRL = OPEN OR V ...

Page 10

... ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers PIN MAX3080E MAX3081E MAX3082E MAX3083E MAX3084E MAX3085E MAX3086E MAX3087E MAX3088E HALF- FULL-DUPLEX DUPLEX DEVICES DEVICES — — — — — — — — — — — — — — — — — — ...

Page 11

... ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers PIN MAX3080E MAX3081E MAX3082E MAX3083E MAX3084E MAX3085E MAX3086E MAX3087E MAX3088E HALF- FULL-DUPLEX DUPLEX DEVICES DEVICES 12 8 — — — — — — 6 — — — — — *(MAX3089E only) In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) will still have a 1/8-unit load, but are not connected to the receiver ...

Page 12

... ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3082E/MAX3085E/MAX3088E TRANSMITTING INPUTS RECEIVING INPUTS RE DE A-B ≥ -0.05V 0 X ≤ -0. Open/shorted Don’t care Shutdown mode, driver and receiver outputs high impedance 12 ______________________________________________________________________________________ MAX3089E OUTPUTS TXP B/Z A High-Z High-Z 1 Shutdown X X OUTPUT ...

Page 13

... Figure 1. MAX3080E/MAX3083E/MAX3086E Pin Configuration and Typical Full-Duplex Operating Circuit TOP VIEW GND DIP/SO Figure 2. MAX3081E/MAX3084E/MAX3087E Pin Configuration and Typical Full-Duplex Operating Circuit TOP VIEW GND DIP/SO Figure 3. MAX3082E/MAX3085E/MAX3088E Pin Configuration and Typical Half-Duplex Operating Circuit ______________________________________________________________________________________ 0.1µ GND RE 0.1µ ...

Page 14

... The MAX3089E’s slew rate is selectable between 115kbps, 500kbps, and 10Mbps by driving a selector pin with a three-state driver. The MAX3082E/MAX3085E/MAX3088E are half-duplex transceivers, while the MAX3080E/MAX3081E/ MAX3083E/MAX3084E/MAX3086E/MAX3087E are full- duplex transceivers. The MAX3089E is selectable between half- and full-duplex communication by driving a selector pin high or low, respectively ...

Page 15

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers RD TOP VIEW H RXP RXP MAX3089E H TXP SRL ...

Page 16

ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers DIFF V OD2 Figure 7. Driver Timing Test Circuit DPHL DPLH 1/2 ...

Page 17

... Figure 15. Driver Output Waveform and FFT Plot of MAX3086E/MAX3087E/MAX3088E, and MAX3089E with SRL = GND, Transmitting a 20kHz Signal A B 20dB/div 1MHz Figure 17. Driver Output Waveform and FFT Plot of MAX3080E/MAX3081E/MAX3082E, and MAX3089E with SRL = Unconnected, Transmitting a 20kHz Signal 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT ...

Page 18

... CC Figure 16’s high-frequency harmonic components are much lower in amplitude, compared with Figure 15’s, and the potential for EMI is significantly reduced. Figure 17 shows the same signal displayed for a MAX3080E/ MAX3081E/MAX3082E, and MAX3089E with SRL = unconnected, transmitting under the same conditions. 18 ______________________________________________________________________________________ DI DATA IN ...

Page 19

... Figure 18. To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possible. The slew-rate-limited MAX3082E/MAX3085E, and the two modes of the MAX3089E, are more tolerant of imperfect termination. MAX3080/3089 FIG-20 5V/div ...

Page 20

... MAX3081EESA -40°C to +85°C MAX3081EEPA -40°C to +85°C MAX3082ECSA 0°C to +70°C MAX3082ECPA 0°C to +70°C MAX3082EESA -40°C to +85°C MAX3082EEPA -40°C to +85°C MAX3083ECSD 0°C to +70°C MAX3083ECPD 0°C to +70°C MAX3083EESD -40°C to +85°C MAX3083EEPD -40°C to +85°C MAX3084ECSA 0° ...

Page 21

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