Maxim MAX491MJD, MAX491ESD, MAX491EPD, MAX488MJA, MAX488ESA Datasheet

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Maxim MAX491MJD, MAX491ESD, MAX491EPD, MAX488MJA, MAX488ESA Datasheet

19-0122; Rev 5; 2/96

Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

_______________General Description

The MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are low-power transceivers for RS-485 and RS422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481, MAX485, MAX490, MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps.

These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. Additionally, the MAX481, MAX483, and MAX487 have a low-current shutdown mode in which they consume only 0.1µA. All parts operate from a single 5V supply.

Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-imped- ance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.

The MAX487 and MAX1487 feature quarter-unit-load receiver input impedance, allowing up to 128 MAX487/ MAX1487 transceivers on the bus. Full-duplex communications are obtained using the MAX488–MAX491, while the MAX481, MAX483, MAX485, MAX487, and MAX1487 are designed for half-duplex applications.

____________________________Features

In µMAX Package: Smallest 8-Pin SO

Slew-Rate Limited for Error-Free Data Transmission (MAX483/487/488/489)

0.1µA Low-Current Shutdown Mode (MAX481/483/487)

Low Quiescent Current: 120µA (MAX483/487/488/489) 230µA (MAX1487)

300µA (MAX481/485/490/491)

-7V to +12V Common-Mode Input Voltage Range

Three-State Outputs

30ns Propagation Delays, 5ns Skew (MAX481/485/490/491/1487)

Full-Duplex and Half-Duplex Versions Available

Operate from a Single 5V Supply

Allows up to 128 Transceivers on the Bus (MAX487/MAX1487)

Current-Limiting and Thermal Shutdown for Driver Overload Protection

________________________Applications

Low-Power RS-485 Transceivers

Low-Power RS-422 Transceivers

Level Translators

Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks

______________Ordering Information

PART

TEMP. RANGE

PIN-PACKAGE

MAX481CPA

0°C to +70°C

8

Plastic DIP

MAX481CSA

0°C to +70°C

8 SO

 

 

 

 

MAX481CUA

0°C to +70°C

8

µMAX

 

 

 

MAX481C/D

0°C to +70°C

Dice*

Ordering Information continued at end of data sheet.

* Contact factory for dice specifications.

______________________________________________________________Selection Table

PART

HALF/FULL

DATA RATE

SLEW-RATE

LOW-POWER

RECEIVER/

QUIESCENT

NUMBER OF

PIN

DRIVER

CURRENT

TRANSMITTERS

NUMBER

DUPLEX

(Mbps)

LIMITED

SHUTDOWN

COUNT

ENABLE

(μA)

ON BUS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX481

Half

2.5

No

Yes

Yes

300

32

8

 

 

 

 

 

 

 

 

 

MAX483

Half

0.25

Yes

Yes

Yes

120

32

8

 

 

 

 

 

 

 

 

 

MAX485

Half

2.5

No

No

Yes

300

32

8

 

 

 

 

 

 

 

 

 

MAX487

Half

0.25

Yes

Yes

Yes

120

128

8

 

 

 

 

 

 

 

 

 

MAX488

Full

0.25

Yes

No

No

120

32

8

 

 

 

 

 

 

 

 

 

MAX489

Full

0.25

Yes

No

Yes

120

32

14

 

 

 

 

 

 

 

 

 

MAX490

Full

2.5

No

No

No

300

32

8

 

 

 

 

 

 

 

 

 

MAX491

Full

2.5

No

No

Yes

300

32

14

 

 

 

 

 

 

 

 

 

MAX1487

Half

2.5

No

No

Yes

230

128

8

 

 

 

 

 

 

 

 

 

________________________________________________________________ Maxim Integrated Products 1

MAX491/MAX1487–MAX481/MAX483/MAX485/MAX487

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487

Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC).............................................................–—–

 

12V

Control Input Voltage (RE, DE)...................

-0.5V to (VCC + 0.5V)

Driver Input Voltage (DI).............................

-0.5V to (VCC + 0.5V)

Driver Output Voltage (A, B)...................................

-8V to +12.5V

Receiver Input Voltage (A, B).................................

-8V to +12.5V

Receiver Output Voltage (RO).....................

-0.5V to (VCC +0.5V)

Continuous Power Dissipation (TA = +70°C)

 

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

727mW

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) ..

800mW

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

471mW

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

 

667mW

8-Pin µMAX (derate 4.1mW/°C above +70°C)

..............

830mW

8-Pin CERDIP (derate 8.00mW/°C above +70°C).........

640mW

14-Pin CERDIP (derate 9.09mW/°C above +70°C).......

727mW

Operating Temperature Ranges

 

 

MAX4_ _C_ _/MAX1487C_ A ...............................

0°C to +70°C

MAX4_ _E_ _/MAX1487E_ A.............................

-40°C to +85°C

MAX4_ _MJ_/MAX1487MJA ...........................

-55°C to +125°C

Storage Temperature Range .............................

-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................

 

+300°C

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.

DC ELECTRICAL CHARACTERISTICS

(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

 

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

Differential Driver Output (no load)

VOD1

 

 

 

 

 

5

V

 

 

 

 

 

 

 

 

Differential Driver Output

VOD2

R = 50Ω (RS-422)

 

2

 

 

V

(with load)

 

 

 

 

 

 

R = 27Ω (RS-485), Figure 4

 

1.5

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

Change in Magnitude of Driver

 

R = 27Ω or 50Ω , Figure 4

 

 

 

 

 

Differential Output Voltage for

VOD

 

 

 

0.2

V

Complementary Output States

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Common-Mode Output

VOC

R = 27Ω or 50Ω , Figure 4

 

 

 

3

V

Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Change in Magnitude of Driver

 

R = 27Ω or 50Ω , Figure 4

 

 

 

 

 

Common-Mode Output Voltage

VOD

 

 

 

0.2

V

for Complementary Output States

 

–—–

 

 

 

 

 

Input High Voltage

VIH

 

2.0

 

 

V

DE, DI, RE

 

 

 

Input Low Voltage

VIL

–—–

 

 

 

0.8

V

DE, DI, RE

 

 

 

Input Current

IIN1

–—–

 

 

 

±2

µA

DE, DI, RE

 

 

 

 

 

DE = 0V;

 

VIN = 12V

 

 

1.0

 

 

 

VCC = 0V or 5.25V,

 

 

 

 

 

 

 

 

 

 

 

mA

Input Current

IIN2

all devices except

 

VIN = -7V

 

 

-0.8

 

 

 

 

MAX487/MAX1487

 

 

 

 

(A, B)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX487/MAX1487,

 

VIN = 12V

 

 

0.25

mA

 

 

DE = 0V, VCC = 0V or 5.25V

 

VIN = -7V

 

 

-0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Differential Threshold

VTH

-7V ≤ VCM ≤ 12V

 

-0.2

 

0.2

V

Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Input Hysteresis

VTH

VCM = 0V

 

 

70

 

mV

 

 

 

 

 

 

 

 

Receiver Output High Voltage

VOH

IO = -4mA, VID = 200mV

 

3.5

 

 

V

 

 

 

 

 

 

 

 

 

Receiver Output Low Voltage

VOL

IO = 4mA, VID = -200mV

 

 

 

0.4

V

 

 

 

 

 

 

 

 

 

Three-State (high impedance)

IOZR

0.4V ≤ VO ≤ 2.4V

 

 

 

±1

µA

Output Current at Receiver

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-7V ≤ VCM ≤ 12V, all devices except

12

 

 

 

 

MAX487/MAX1487

 

 

 

Receiver Input Resistance

RIN

 

 

 

 

 

 

 

 

 

 

 

 

-7V ≤ VCM ≤ 12V, MAX487/MAX1487

48

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 _______________________________________________________________________________________

Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

 

 

 

 

 

MAX488/MAX489,

 

 

 

120

250

 

 

 

–—–

 

 

 

 

 

 

DE, DI, RE = 0V or VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX490/MAX491,

 

 

 

300

500

 

 

 

–—–

 

 

 

 

 

 

DE, DI, RE = 0V or VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX481/MAX485,

 

DE = VCC

 

500

900

 

No-Load Supply Current

ICC

–—–

 

 

 

 

 

 

µA

 

DE = 0V

 

300

500

(Note 3)

RE = 0V or VCC

 

 

 

 

MAX1487,

 

DE = VCC

 

300

500

 

 

 

–—–

 

 

 

 

 

 

 

 

 

 

DE = 0V

 

230

400

 

 

 

RE = 0V or VCC

 

 

 

 

 

MAX483/MAX487,

 

DE = 5V

MAX483

 

350

650

 

 

 

 

 

 

 

 

 

 

 

 

MAX487

 

250

400

 

 

 

–—–

 

 

 

 

 

 

RE = 0V or VCC

 

 

 

 

 

 

 

 

 

 

DE = 0V

 

120

250

 

 

 

 

 

 

 

 

 

 

 

–—–

 

 

 

 

Supply Current in Shutdown

ISHDN

 

 

 

0.1

10

µA

MAX481/483/487, DE = 0V, RE = VCC

 

Driver Short-Circuit Current,

IOSD1

-7V ≤ VO ≤ 12V (Note 4)

 

 

35

 

250

mA

VO = High

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Short-Circuit Current,

IOSD2

-7V ≤ VO ≤ 12V (Note 4)

 

 

35

 

250

mA

VO = Low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Short-Circuit Current

IOSR

0V ≤ VO ≤ VCC

 

 

7

 

95

mA

SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487

(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

Driver Input to Output

tPLH

Figures 6 and 8, RDIFF = 54Ω ,

10

30

60

ns

tPHL

CL1 = CL2 = 100pF

 

10

30

60

 

 

 

Driver Output Skew to Output

tSKEW

Figures 6 and 8, RDIFF = 54Ω , CL1 = CL2 = 100pF

 

5

10

ns

 

 

 

 

 

 

 

 

 

 

 

 

Figures 6 and 8,

 

MAX481, MAX485, MAX1487

3

15

40

 

Driver Rise or Fall Time

tR, tF

RDIFF = 54Ω ,

 

 

MAX490C/E, MAX491C/E

5

15

25

ns

 

 

CL1 = CL2 = 100pF

 

 

 

 

 

 

 

 

 

MAX490M, MAX491M

3

15

40

 

 

 

 

 

 

 

 

 

 

Driver Enable to Output High

tZH

Figures 7 and 9, CL = 100pF, S2 closed

 

40

70

ns

 

 

 

 

 

 

 

 

 

Driver Enable to Output Low

tZL

Figures 7 and 9, CL = 100pF, S1 closed

 

40

70

ns

 

 

 

 

 

 

 

 

 

Driver Disable Time from Low

tLZ

Figures 7 and 9, CL = 15pF, S1 closed

 

40

70

ns

 

 

 

 

 

 

 

Driver Disable Time from High

tHZ

Figures 7 and 9, CL = 15pF, S2 closed

 

40

70

ns

 

 

 

 

 

 

 

 

 

 

 

 

Figures 6 and 10,

 

MAX481, MAX485, MAX1487

20

90

200

 

Receiver Input to Output

tPLH, tPHL

RDIFF = 54Ω ,

 

 

MAX490C/E, MAX491C/E

20

90

150

ns

 

 

CL1 = CL2 = 100pF

 

 

 

 

 

 

 

 

 

MAX490M, MAX491M

20

90

200

 

 

 

 

 

 

 

 

 

 

| tPLH - tPHL | Differential

tSKD

Figures 6 and 10, RDIFF = 54Ω ,

 

13

 

ns

Receiver Skew

CL1 = CL2 = 100pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Enable to Output Low

tZL

Figures 5 and 11, CRL = 15pF, S1 closed

 

20

50

ns

 

 

 

 

 

 

 

Receiver Enable to Output High

tZH

Figures 5 and 11, CRL = 15pF, S2 closed

 

20

50

ns

 

 

 

 

 

 

 

Receiver Disable Time from Low

tLZ

Figures 5 and 11, CRL = 15pF, S1 closed

 

20

50

ns

 

 

 

 

 

 

 

Receiver Disable Time from High

tHZ

Figures 5 and 11, CRL = 15pF, S2 closed

 

20

50

ns

 

 

 

 

 

 

 

 

 

 

Maximum Data Rate

fMAX

 

 

 

 

2.5

 

 

Mbps

Time to Shutdown

tSHDN

MAX481 (Note 5)

 

50

200

600

ns

MAX491/MAX1487–MAX481/MAX483/MAX485/MAX487

_______________________________________________________________________________________ 3

MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487

Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued)

(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

 

 

 

 

 

 

 

Driver Enable from Shutdown to

tZH(SHDN)

Figures 7 and 9, CL = 100pF, S2 closed

 

40

100

ns

Output High (MAX481)

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Enable from Shutdown to

tZL(SHDN)

Figures 7 and 9, CL = 100pF, S1 closed

 

40

100

ns

Output Low (MAX481)

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Enable from Shutdown

tZH(SHDN)

Figures 5 and 11, CL = 15pF, S2 closed,

 

300

1000

ns

to Output High (MAX481)

 

A - B = 2V

 

 

 

 

 

 

 

 

 

 

 

Receiver Enable from Shutdown

tZL(SHDN)

Figures 5 and 11, CL = 15pF, S1 closed,

 

300

1000

ns

to Output Low (MAX481)

 

B - A = 2V

 

 

 

 

 

 

 

 

 

 

 

SWITCHING CHARACTERISTICS—MAX483, MAX487/MAX488/MAX489

(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Driver Input to Output

tPLH

Figures 6 and 8, RDIFF = 54Ω ,

250

800

2000

ns

tPHL

CL1 = CL2 = 100pF

250

800

2000

 

 

 

 

 

 

 

 

 

Driver Output Skew to Output

tSKEW

Figures 6 and 8, RDIFF = 54Ω ,

 

100

800

ns

CL1 = CL2 = 100pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Rise or Fall Time

tR, tF

Figures 6 and 8, RDIFF = 54Ω ,

250

 

2000

ns

CL1 = CL2 = 100pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Driver Enable to Output High

tZH

Figures 7 and 9, CL = 100pF, S2 closed

250

 

2000

ns

 

 

 

 

 

 

 

Driver Enable to Output Low

tZL

Figures 7 and 9, CL = 100pF, S1 closed

250

 

2000

ns

 

 

 

 

 

 

 

Driver Disable Time from Low

tLZ

Figures 7 and 9, CL = 15pF, S1 closed

300

 

3000

ns

 

 

 

 

 

 

 

Driver Disable Time from High

tHZ

Figures 7 and 9, CL = 15pF, S2 closed

300

 

3000

ns

 

 

 

 

 

 

 

Receiver Input to Output

tPLH

Figures 6 and 10, RDIFF = 54Ω ,

250

 

2000

ns

tPHL

CL1 = CL2 = 100pF

250

 

2000

 

 

 

 

 

 

 

 

 

 

I tPLH - tPHL I Differential

tSKD

Figures 6 and 10, RDIFF = 54Ω ,

 

100

 

ns

Receiver Skew

CL1 = CL2 = 100pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiver Enable to Output Low

tZL

Figures 5 and 11, CRL = 15pF, S1 closed

 

20

50

ns

 

 

 

 

 

 

 

Receiver Enable to Output High

tZH

Figures 5 and 11, CRL = 15pF, S2 closed

 

20

50

ns

 

 

 

 

 

 

 

Receiver Disable Time from Low

tLZ

Figures 5 and 11, CRL = 15pF, S1 closed

 

20

50

ns

 

 

 

 

 

 

 

Receiver Disable Time from High

tHZ

Figures 5 and 11, CRL = 15pF, S2 closed

 

20

50

ns

 

 

 

 

 

 

 

Maximum Data Rate

fMAX

tPLH, tPHL < 50% of data period

250

 

 

kbps

 

 

 

 

 

 

 

Time to Shutdown

tSHDN

MAX483/MAX487 (Note 5)

50

200

600

ns

 

 

 

 

 

 

 

Driver Enable from Shutdown to

tZH(SHDN)

MAX483/MAX487, Figures 7 and 9,

 

 

2000

ns

Output High

CL = 100pF, S2 closed

 

 

 

 

 

 

 

 

 

Driver Enable from Shutdown to

tZL(SHDN)

MAX483/MAX487, Figures 7 and 9,

 

 

2000

ns

Output Low

 

CL = 100pF, S1 closed

 

 

 

 

Receiver Enable from Shutdown

tZH(SHDN)

MAX483/MAX487, Figures 5 and 11,

 

 

2500

ns

to Output High

CL = 15pF, S2 closed

 

 

 

 

 

 

 

 

 

Receiver Enable from Shutdown

tZL(SHDN)

MAX483/MAX487, Figures 5 and 11,

 

 

2500

ns

to Output Low

 

CL = 15pF, S1 closed

 

 

 

 

4 _______________________________________________________________________________________

Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICS

Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified.

Note 2: All typical specifications are given for VCC = 5V and TA = +25°C.

Note 3: Supply current specification is valid for loaded transmitters when DE = 0V.

Note 4: Applies to peak current. See Typical Operating Characteristics.

–—–

Note 5: The MAX481/MAX483/MAX487 are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See Low-Power Shutdown Mode section.

__________________________________________Typical Operating Characteristics

(VCC = 5V, TA = +25°C, unless otherwise noted.)

 

 

 

 

 

OUTPUT CURRENT vs.

 

 

 

 

 

 

 

 

OUTPUT CURRENT vs.

 

 

 

 

 

 

 

RECEIVER OUTPUT HIGH VOLTAGE vs.

 

 

 

RECEIVER OUTPUT LOW VOLTAGE

 

 

 

 

 

RECEIVER OUTPUT HIGH VOLTAGE

 

 

 

 

 

 

 

 

TEMPERATURE

 

 

 

 

 

 

45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX481-01

-20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX481-02

 

4.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX481-03

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGHOUTPUTVOLTAGE (V)

 

 

 

 

 

 

 

 

IRO = 8mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CURRENTOUTPUT (mA)

35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CURRENTOUTPUT (mA)

-16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0.5

1.0

1.5

 

 

2.0

 

 

2.5

 

1.5

2.0

2.5 3.0 3.5 4.0

 

4.5

5.0

 

-50

-25

0

25

50

75

100

 

125

 

 

 

 

OUTPUT LOW VOLTAGE (V)

 

 

 

 

 

 

 

 

OUTPUT HIGH VOLTAGE (V)

 

 

 

 

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

 

 

RECEIVER OUTPUT LOW VOLTAGE vs.

 

 

 

DRIVER OUTPUT CURRENT vs.

 

 

 

DRIVER DIFFERENTIAL OUTPUT VOLTAGE

 

 

 

 

 

 

 

TEMPERATURE

 

 

 

 

 

 

 

 

 

DIFFERENTIAL OUTPUT VOLTAGE

 

 

 

 

 

 

 

vs. TEMPERATURE

 

 

 

 

 

 

0.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX481-04

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAX481-05

 

2.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-06

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.8

 

 

 

 

 

 

 

 

 

 

 

IRO = 8mA

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(V)

2.3

 

 

 

 

 

 

 

 

 

R = 54

Ω

 

 

MAX481

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(V)VOLTAGELOWOUTPUT

0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(mA)CURRENTOUTPUT

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLTAGEOUTPUTDIFFERENTIAL

1.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-50

-25

 

0 25

50 75

100

 

125

 

0

0.5

 

1.0 1.5 2.0 2.5 3.0 3.5

4.0

4.5

 

-50

-25

0

25

50

75

100

 

125

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

 

 

 

 

DIFFERENTIAL OUTPUT VOLTAGE (V)

 

 

 

 

 

 

 

TEMPERATURE (°C)

 

 

 

 

 

MAX491/MAX1487–MAX481/MAX483/MAX485/MAX487

_______________________________________________________________________________________ 5

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