MAXIM MAX3080, MAX3089 Technical data

Selection Table

*Pin-compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.

MAX3080–MAX3089

Fail-Safe, High-Speed (10Mbps),

Slew-Rate-Limited RS-485/RS-422 Transceivers

________________________________________________________________

Maxim Integrated Products

19-1138; Rev 1; 12/97

14 SO-40°C to +85°CMAX3080ESD

14 Plastic DIP

14 SO

14 Plastic DIP

PIN-PACKAGETEMP. RANGE

0°C to +70°C 0°C to +70°C

-40°C to +85°CMAX3080EPD

MAX3080CSD

MAX3080CPD

PART

256

Transceivers

Bus

75180*14375YesYesSelectableSelectableSelectable

MAX3089

751768375YesYesNo10Half

MAX3088

751798375NoNoNo10Full

MAX3087

7518014375YesYesNo10Full

MAX3086

751768375YesYesYes0.5Half

MAX3085

751798375NoNoYes0.5Full

MAX3084

7518014375YesYesYes0.5Full

MAX3083

751768375YesYesYes0.115Half

MAX3082

751798375NoNoYes0.115Full

MAX3081

7518014375YesYesYes0.115Full

MAX3080

IndustryStandard

Pinout

Count

Quiescent

Current

(µA)

Receiver/

Driver

Enable

Low-

Power

Shutdown

Slew Rate

Limited

Data

Rate

(Mbps)

Half/Full

Duplex

Part

Ordering Information continued on last page.

Ordering Information

General Description

The MAX3080–MAX3089 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 shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). The MAX3080/MAX3081/MAX3082 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The MAX3083/MAX3084/MAX3085 offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX3086/MAX3087/MAX3088’s driver slew rates are not limited, making transmit speeds up to 10Mbps possible. The MAX3089’s slew rate is selectable between 115kbps, 500kbps, and 10Mbps by driving a selector pin with a single three-state driver.

These transceivers typically draw 375µA of supply current when unloaded, or when fully loaded with the drivers disabled.

All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The MAX3082/MAX3085/MAX3088 are intended for halfduplex communications, while the MAX3080/MAX3081/ MAX3083/MAX3084/MAX3086/MAX3087 are intended for full-duplex communications. The MAX3089 is selectable between half-duplex and full-duplex operation. It also features independently programmable receiver and transmitter output phase via separate pins.

Features

♦ True Fail-Safe Receiver While Maintaining

EIA/TIA-485 Compatibility

♦ Enhanced Slew-Rate Limiting Facilitates

Error-Free Data Transmission (MAX3080–MAX3085/MAX3089)

♦ 1nA Low-Current Shutdown Mode (except

MAX3081/MAX3084/MAX3087)

♦ Pin-Selectable Full/Half-Duplex Operation

(MAX3089)

♦ Phase Controls to Correct for Twisted-Pair

Reversal (MAX3089)

♦ Allow Up to 256 Transceivers on the Bus

Applications

RS-422/RS-485 Communications Level Translators Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks

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.

查询MAX3080供应商

MAX3080–MAX3089

Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltage (VCC) ............................................................+7V

Control Input Voltage (

RE, DE)...................-0.3V to (VCC+ 0.3V)

Special Input Voltage

(H/F, SRL, TXP, RXP)..................................-0.3V to (V

+ 0.3V)

Driver Input Voltage (DI).............................-0.3V to (V

+ 0.3V)

Driver Output Voltage (A, B, Y, Z)........................................±13V

Receiver Input Voltage (A, B)..............................................±13V

Receiver Input Voltage, Full Duplex (A, B)..........................±25V

Receiver Output Voltage (RO)....................-0.3V to (V

+ 0.3V)

Continuous Power Dissipation

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW

8-Pin SO (derate 5.88mW/°C above +70°C)................471mW

14-Pin Plastic DIP (derate 10.0mW/°C above +70°C) ....800mW

14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW

Operating Temperature Ranges

MAX308_C_ _ .....................................................0°C to +70°C

MAX308_E_ _...................................................-40°C to +85°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

Figure 5, R = 50Ω (RS-422)

DE = GND, VCC= GND or 5.25V

H/F, TXP, RXP, internal pull-down

DE, DI, RE

SRL = V

SRL

MAX3080–MAX3085, and MAX3089 with SRL = VCCor unconnected

DE, DI, RE, H/F, TXP, RXP

Figure 5, R = 50Ω or R = 27Ω

SRL (Note 3)

DE, DI, RE, H/F, TXP, RXP

SRL

CONDITIONS

µA

125

Output Leakage (Y and Z) Full Duplex

µA

125

IN4

Input Current (A and B) Full Duplex

µA

IN3

SRL Input Current

V0.8V

IL2

Input Low Voltage

V0.4V

0.6V

IM2

Input Middle Voltage

VVCC- 0.8V

IH2

Input High Voltage

2.0

OD2

Differential Driver Output

10 40I

IN2

µA

±2I

IN1

SRL Input Current

mV100V

HYS

DI Input Hysteresis

V0.8V

IL1

Input Low Voltage

V0.2∆V

Change in Magnitude of Differential Output Voltage (Note 2)

V3V

Driver Common-Mode Output Voltage

V0.2∆V

Change In Magnitude of Common-Mode Voltage (Note 2)

V2.0V

IH1

Input High Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

Figure 5, R = 27Ω (RS-485) 1.5

SRL = GND (Note 3) -75

VIN= 12V

VIN= -7V -100

-75VIN= -7V

Figure 5 V5V

OD1

Differential Driver Output (no load)

mAV

OD1

Driver Short-Circuit Output Current (Note 4)

DRIVER

-7V ≤ V

OUT

≤ V

-250

0V ≤ V

OUT

≤ 12V

0V ≤ V

OUT

≤ V

±25

250

MAX3080–MAX3089

Fail-Safe, High-Speed (10Mbps),

Slew-Rate-Limited RS-485/RS-422 Transceivers

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.) (Note 1)

0V ≤ VRO≤ V

-7V ≤ VCM≤ 12V

0.4V ≤ VO≤ 2.4V

-7V ≤ VCM≤ 12V

IO= -4mA, VID= -50mV

DE = GND, VRE= V

IO= 4mA, VID= -200mV

No load, RE = DI = GND or V

, SRL = V

CONDITIONS

µA0.001 10I

SHDN

Supply Current in Shutdown Mode

µA

Supply Current

mA±7 ±95I

OSR

Receiver Output Short-Circuit Current

kΩ96R

Receiver Input Resistance

µA±1I

OZR

Three-State Output Current at Receiver

mV-200 -125 -50V

Receiver Differential Threshold Voltage

mV25∆V

Receiver Input Hysteresis

VVCC-1.5V

Receiver Output High Voltage

V0.4V

Receiver Output Low Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

No load, RE = DI = GND or V

, SRL = GND

DE = V

420 800

µA

475 1000

DE = GND

430 900 375 600

Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referred to device

ground unless otherwise noted.

Note 2: ∆V

and ∆VOCare the changes in VODand VOC, respectively, when the DI input changes state.

Note 3: The SRL pin is internally biased to V

/ 2 by a 100kΩ/100kΩ resistor divider. It is guaranteed to be V

/ 2 if left

unconnected.

Note 4: Maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during

current limiting.

RECEIVER

SUPPLY CURRENT

MAX3080–MAX3089

Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers

4 _______________________________________________________________________________________

SWITCHING CHARACTERISTICS—MAX3080–MAX3082, and MAX3089 with SRL = Unconnected

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Figures 6 and 12, CL= 100pF, S1 closed

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Figures 6 and 12, CL= 100pF, S2 closed

Figures 8 and 10, CL= 15pF, S1 closed

Figures 8 and 10, CL= 15pF, S2 closed

Figures 6 and 12, CL= 100pF, S1 closed

Figures 11 and 13; |V

ID |

≥ 2.0V;

rise and fall time of V

≤ 15ns

(Note 5)

Figures 6 and 12, CL= 100pF, S2 closed

Figures 11 and 13; |V

ID |

≥ 2.0V;

rise and fall time of V

≤ 15ns

Figures 8 and 10, CL= 15pF, S2 closed

Figures 8 and 10, CL= 100pF, S2 closed Figures 8 and 10, CL= 100pF, S1 closed

Figures 6 and 12, CL= 100pF, S1 closed

Figures 8 and 10, CL= 15pF, S1 closed

Figures 6 and 12, CL= 100pF, S2 closed

CONDITIONS

ns3500t

RZL(SHDN)

Receiver Enable from Shutdown to Output Low

ns3500t

RZH(SHDN)

Receiver Enable from Shutdown to Output High

ns6000t

DZL(SHDN)

Driver Enable from Shutdown to Output Low

ns6000t

DZH(SHDN)

Driver Enable from Shutdown to Output High

ns50 200 600t

SHDN

Time to Shutdown

ns20 50t

RHZ

Receiver Disable Time from High

ns20 50t

RLZ

Receiver Disable Time from Low

ns20 50t

RZH

Receiver Enable to Output High

ns667 1320 2500tDR, t

Driver Rise or Fall Time

ns-3 ±200t

DSKEW

500 2030 2600t

DPLH

Driver Input to Output

Driver Output Skew

DPLH

- t

DPHL |

ns20 50t

RZL

Receiver Enable to Output Low

ns3±30t

RSKD

RPLH

- t

RPHL |

Differential

Receiver Skew

ns127 200

RPLH

RPHL

Receiver Input to Output

ns100t

DHZ

Driver Disable Time from High

kbps115f

MAX

Maximum Data Rate

ns3500t

DZH

Driver Enable to Output High

ns3500t

DZL

Driver Enable to Output Low

ns100t

DLZ

Driver Disable Time from Low

UNITSMIN TYP MAXSYMBOLPARAMETER

DPHL

500 2030 2600

MAX3080–MAX3089

Fail-Safe, High-Speed (10Mbps),

Slew-Rate-Limited RS-485/RS-422 Transceivers

_______________________________________________________________________________________ 5

SWITCHING CHARACTERISTICS—MAX3083–MAX3085, and MAX3089 with SRL = V

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Figures 6 and 12, CL= 100pF, S2 closed

Figures 8 and 10, CL= 15pF, S1 closed

Figures 8 and 10, CL= 15pF, S2 closed

Figures 6 and 12, CL= 100pF, S1 closed

Figures 11 and 13; |V

≥ 2.0V;

rise and fall time of V

≤ 15ns

(Note 5)

Figures 6 and 12, CL= 100pF, S2 closed

Figures 11 and 13; |V

≥ 2.0V;

rise and fall time of V

≤ 15ns

Figures 8 and 10, CL= 15pF, S2 closed

Figures 8 and 10, CL= 100pF, S2 closed Figures 8 and 10, CL= 100pF, S1 closed

Figures 6 and 12, CL= 100pF, S1 closed

Figures 8 and 10, CL= 15pF, S1 closed

Figures 6 and 12, CL= 100pF, S2 closed

CONDITIONS

ns3500t

RZH(SHDN)

Receiver Enable from Shutdown to Output High

ns4500t

DZL(SHDN)

Driver Enable from Shutdown to Output Low

ns4500t

DZH(SHDN)

Driver Enable from Shutdown to Output High

ns50 200 600t

SHDN

Time to Shutdown

ns20 50t

RHZ

Receiver Disable Time from High

ns20 50t

RLZ

Receiver Disable Time from Low

ns20 50t

RZH

Receiver Enable to Output High

ns200 530 750t

DR, tDF

Driver Rise or Fall Time

ns-3 ±100t

DSKEW

250 720 1000t

DPLH

Driver Input to Output Driver Output Skew

DPLH

- t

DPHL |

ns20 50t

RZL

Receiver Enable to Output Low

ns3±30t

RSKD

RPLH

- t

RPHL

Differential

Receiver Skew

ns127 200

RPLH

RPHL

Receiver Input to Output

ns100t

DHZ

Driver Disable Time from High

kbps500f

MAX

Maximum Data Rate

ns2500t

DZH

Driver Enable to Output High

ns2500t

DZL

Driver Enable to Output Low

ns100t

DLZ

Driver Disable Time from Low

UNITSMIN TYP MAXSYMBOLPARAMETER

DPHL

Figures 6 and 12, CL= 100pF, S1 closed ns3500t

RZL(SHDN)

Receiver Enable from Shutdown to Output Low

250 720 1000

MAX3080–MAX3089

Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers

6 _______________________________________________________________________________________

SWITCHING CHARACTERISTICS—MAX3086–MAX3088, and MAX3089 with SRL = GND

(VCC= +5V ±5%, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)

DPHL

Figures 6 and 12, CL= 100pF, S1 closed ns

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

3500t

RZL(SHDN)

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Receiver Enable from Shutdown to Output Low

Figures 7 and 9, R

DIFF

= 54Ω,

CL1= CL2= 100pF

Figures 6 and 12, CL= 100pF, S2 closed

Figures 8 and 10, CL= 15pF, S1 closed

Figures 8 and 10, CL= 15pF, S2 closed

Figures 6 and 12, CL= 100pF, S1 closed

Figures 11 and 13; |V

ID |

≥ 2.0V;

rise and fall time of V

≤ 15ns

(Note 5)

Figures 6 and 12, CL= 100pF, S2 closed

Figures 11 and 13; |V

ID |

≥ 2.0V;

rise and fall time of V

≤ 15ns

Figures 8 and 10, CL= 15pF, S2 closed

Figures 8 and 10, CL= 100pF, S2 closed Figures 8 and 10, CL= 100pF, S1 closed

Figures 6 and 12, CL= 100pF, S1 closed

Figures 8 and 10, CL= 15pF, S1 closed

Figures 6 and 12, CL= 100pF, S2 closed

CONDITIONS

34 60

ns3500t

RZH(SHDN)

Receiver Enable from Shutdown to Output High

ns250t

DZL(SHDN)

Driver Enable from Shutdown to Output Low

ns250t

DZH(SHDN)

Driver Enable from Shutdown to Output High

ns50 200 600t

SHDN

Time to Shutdown

ns20 50t

RHZ

Receiver Disable Time from High

ns20 50t

RLZ

Receiver Disable Time from Low

ns20 50t

RZH

Receiver Enable to Output High

ns14 25t

DR, tDF

Driver Rise or Fall Time

ns-2.5 ±10t

DSKEW

34 60t

DPLH

Driver Input to Output Driver Output Skew

DPLH

- t

DPHL |

ns20 50t

RZL

Receiver Enable to Output Low

ns0±10t

RSKD

RPLH

- t

RPHL |

Differential

Receiver Skew

ns106 150

RPLH

RPHL

Receiver Input to Output

ns100t

DHZ

Driver Disable Time from High

Mbps10f

MAX

Maximum Data Rate

ns150t

DZH

Driver Enable to Output High

ns150t

DZL

Driver Enable to Output Low

ns100t

DLZ

Driver Disable Time from Low

UNITSMIN TYP MAXSYMBOLPARAMETER

Note 5: The device is put into shutdown by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the

device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the device is guaranteed to have entered shutdown.

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