MAX3075EASA+ Maxim Integrated Products, MAX3075EASA+ Datasheet

IC TXRX RS485/422 8-SOIC

MAX3075EASA+

Manufacturer Part Number
MAX3075EASA+
Description
IC TXRX RS485/422 8-SOIC
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet
1.MAX3070EESD.pdf (24 pages)

Specifications of MAX3075EASA+

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Data Rate
500 Kbps
Operating Supply Voltage
3.3 V
Supply Current
0.8 mA
Operating Temperature Range
- 40 C to + 125 C
Maximum Power Dissipation
471 mW
Mounting Style
SMD/SMT
Device Type
Transceiver
Ic Interface Type
RS422, RS485
No. Of Drivers
1
Supply Voltage Range
2.97V To 3.63V
Driver Case Style
SOIC
No. Of Pins
8
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX3070E–MAX3079E 3.3V, ±15kV ESD-protected,
RS-485/RS-422 transceivers feature one driver and one
receiver. These devices include fail-safe circuitry, guar-
anteeing a logic-high receiver output when receiver
inputs are open or shorted. The receiver outputs a logic
high if all transmitters on a terminated bus are disabled
(high impedance). The MAX3070E–MAX3079E include a
hot-swap capability to eliminate false transitions on the
bus during power-up or hot insertion.
The MAX3070E/MAX3071E/MAX3072E feature reduced
slew-rate drivers that minimize EMI and reduce reflec-
tions caused by improperly terminated cables, allowing
error-free data transmission up to 250kbps. The
MAX3073E/MAX3074E/MAX3075E also feature slew-
rate-limited drivers but allow transmit speeds up to
500kbps. The MAX3076E/MAX3077E/MAX3078E driver
slew rates are not limited, making transmit speeds up to
16Mbps possible. The MAX3079E slew rate is pin
selectable for 250kbps, 500kbps, and 16Mbps.
The MAX3072E/MAX3075E/MAX3078E are intended for
half-duplex communications, and the MAX3070E/
MAX3071E/MAX3073E/MAX3074E/MAX3076E/MAX307
7E are intended for full-duplex communications. The
MAX3079E is selectable for half-duplex or full-duplex
operation. It also features independently programmable
receiver and transmitter output phase through
separate pins.
The MAX3070E–MAX3079E transceivers draw 800µA
of supply current when unloaded or when fully loaded
with the drivers disabled. All devices have a 1/8-unit
load receiver input impedance, allowing up to 256
transceivers on the bus.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
19-2668; Rev 2; 4/09
Lighting Systems
Industrial Control
Telecom
Security Systems
Instrumentation
________________________________________________________________ Maxim Integrated Products
Hot-Swap, RS-485/RS-422 Transceivers
+3.3V, ±15kV ESD-Protected, Fail-Safe,
General Description
Applications
♦ 3.3V Operation
♦ Electrostatic Discharge (ESD) Protection for
♦ True Fail-Safe Receiver While Maintaining
♦ Hot-Swap Input Structure on DE and RE
♦ Enhanced Slew-Rate Limiting Facilitates Error-
♦ Low-Current Shutdown Mode (Except
♦ Pin-Selectable Full-/Half-Duplex Operation
♦ Phase Controls to Correct for Twisted-Pair
♦ Allow Up to 256 Transceivers on the Bus
♦ Available in Industry-Standard 8-Pin SO Package
†Devices are available in both leaded (Pb) and lead(Pb)-free
packaging. Specify lead-free by adding a “+” after the part
number.
Ordering Information continued at end of data sheet.
Selector Guide, Pin Configurations, and Typical Operating
Circuits appear at end of data sheet.
MAX3070EEPD
MAX3070EESD
MAX3070EAPD
MAX3070EASD
MAX3071EEPA
MAX3071EESA
MAX3071EAPA
MAX3071EASA
RS-485 I/O Pins
EIA/TIA-485 Compatibility
Free Data Transmission
(MAX3070E–MAX3075E/MAX3079E)
MAX3071E/MAX3074E/MAX3077E)
(MAX3079E)
Reversal (MAX3079E)
±15kV Human Body Model
PART†
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Ordering Information
TEMP RANGE
PIN-PACKAGE
14 Plastic DIP
14 SO
14 Plastic DIP
14 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Features
1

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MAX3075EASA+ Summary of contents

Page 1

... Applications Lighting Systems Industrial Control Telecom Security Systems Instrumentation ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ 3.3V Operation ♦ Electrostatic Discharge (ESD) Protection for RS-485 I/O Pins ± ...

Page 2

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND) Supply Voltage (V ).............................................................+6V CC Control Input Voltage (RE, DE, SLR, H/F, TXP, RXP)......................................................-0.3V to +6V Driver Input Voltage (DI)...........................................-0.3V to +6V Driver Output Voltage ...

Page 3

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers DC ELECTRICAL CHARACTERISTICS (continued 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Driver Short-Circuit Output Current Driver Short-Circuit ...

Page 4

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers DRIVER SWITCHING CHARACTERISTICS MAX3070E/MAX3071E/MAX3072E/MAX3079E with SRL = UNCONNECTED (250kbps 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ...

Page 5

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers DRIVER SWITCHING CHARACTERISTICS MAX3073E/MAX3074E/MAX3075E/MAX3079E with SRL = 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Driver ...

Page 6

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers DRIVER SWITCHING CHARACTERISTICS MAX3076E/MAX3077E/MAX3078E/MAX3079E with SRL = GND (16Mbps 3.3V ±10 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL ...

Page 7

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (V = 3.3V +25°C, unless otherwise noted. Note: The MAX3077EMSA/PR meets specification over temperature SUPPLY CURRENT vs. TEMPERATURE 1 0.7 ...

Page 8

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (V = 3.3V +25°C, unless otherwise noted. Note: The MAX3077EMSA/PR meets specification over temperature SHUTDOWN CURRENT vs. TEMPERATURE 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 ...

Page 9

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers (V = 3.3V +25°C, unless otherwise noted. Note: The MAX3077EMSA/PR meets specification over temperature DRIVER PROPAGATION DELAY (500kbps) MAX3070E toc18 DI 2V/div 2V/div 400ns/div Y ...

Page 10

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers GENERATOR DZH DZH(SHDN) OUT Figure 4. Driver Enable and Disable Times ( GENERATOR DZL DZL(SHDN OUT V ...

Page 11

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers V ATE ID Figure 6. Receiver Propagation Delay Test Circuit +1.5V -1.5V S1 OPEN S2 CLOSED S3 = +1. OPEN S2 CLOSED S3 = +1.5V 1. RHZ 0.25V ...

Page 12

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers PIN MAX3070E MAX3071E MAX3072E MAX3073E MAX3074E MAX3075E MAX3076E MAX3077E MAX3078E HALF- FULL-DUPLEX DUPLEX DEVICES DEVICES — — — — — — — — ...

Page 13

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers PIN MAX3070E MAX3071E MAX3072E MAX3073E MAX3074E MAX3075E MAX3076E MAX3077E MAX3078E HALF- FULL-DUPLEX DUPLEX DEVICES DEVICES 12 8 — — — — — — 6 — — — ...

Page 14

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers MAX3072E/MAX3075E/MAX3078E TRANSMITTING INPUTS MAX3079E RE TXP ...

Page 15

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers Detailed Description The MAX3070E–MAX3079E high-speed transceivers for RS-485/RS-422 communication 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 ...

Page 16

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers V CC 10μs TIMER TIMER 5kΩ DE 100μA 500μ Figure 9. Simplified Structure of the Driver Enable Pin (DE) MAX3079E Programming The MAX3079E has several programmable operating modes. Transmitter rise and ...

Page 17

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 10a. Human Body ESD Test Model 50MΩ TO ...

Page 18

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers Low-Power Shutdown Mode (Except MAX3071E/MAX3074E/MAX3077E) Low-power shutdown mode is initiated by bringing both RE high and DE low. In shutdown, the devices typically draw only 50nA of supply current. RE and DE can ...

Page 19

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers A 120Ω 120Ω Figure 13. Typical Full-Duplex RS-485 Network HALF/FULL- DATA RATE PART DUPLEX (Mbps) MAX3070E Full 0.250 MAX3071E Full 0.250 MAX3072E Half 0.250 ...

Page 20

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers N. N. GND N.C. GND 7 8 DIP/SO V ...

Page 21

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers Pin Configurations and Typical Operating Circuits (continued) TOP VIEW RO H RXP RXP MAX3079E H ...

Page 22

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers PART† TEMP RANGE MAX3072EEPA -40°C to +85°C MAX3072EESA -40°C to +85°C MAX3072EAPA -40°C to +125°C MAX3072EASA -40°C to +125°C MAX3073EEPD -40°C to +85°C MAX3073EESD -40°C to +85°C MAX3073EAPD -40°C to +125°C MAX3073EASD -40°C ...

Page 23

ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different ...

Page 24

... 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. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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