MAX3480A datasheet(3/16 Pages) MAXIM

Part #	MAX3480A

Description	Complete, Isolated, 3.3V RS-485/RS-422 Data Interface

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Manufacturer	MAXIM [Maxim Integrated Products]

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0.8

VIN = 12V

Complete, Isolated, 3.3V

RS-485/RS-422 Data Interface

_______________________________________________________________________________________

3

DI

´ = VCC

CONDITIONS

1.0

ISO IIN

VCM = 0V

V

0.4

VOL

Receiver Output/Receiver Output

Low Voltage

mA

70

∆VTH

Input Current (A, B)

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

ELECTRICAL CHARACTERISTICS (continued)

(VCC = VCC1 = VCC2 = VCC4 = VCC5 = 3.0V to 3.6V, FS = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at

VCC = VCC1 = VCC2 = VCC4 = VCC5 = 3.3V and TA = +25°C.) (Notes 1, 2, 3)

Receiver Input Hysteresis

VOUT = 3.6V, DI

´ = 0V

µA

250

IOH

Receiver Output/Receiver Output

High Current

-7V

≤ VO ≤ 12V (Note 4)

mA

100

ISO IOSD

Driver Short-Circuit Current

DE

´ = 0V,

VCC = 0V or 3.6V

mV

SWITCHING CHARACTERISTICS—MAX3480A

(VCC = VCC1 = VCC2 = VCC4 =VCC5 = 3.0V to 3.6V, FS = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at

VCC = VCC1 = VCC2 = VCC4 = VCC5 = 3.3V and TA = +25°C.)

ns

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

tPLH - tPHL Differential

Receiver Skew

Driver Input to Output

Propagation Delay

tPLH

100

275

ns

Driver Output Skew (Note 5)

tSKEW

25

90

ns

Driver Rise or Fall Time

tR, tF

15

40

ns

Driver Enable to Output High

tZH

0.2

1.5

µs

Driver Enable to Output Low

tZL

0.2

1.5

µs

Driver Disable Time from High

tHZ

0.3

1.5

µs

CONDITIONS

Figures 4, 6; RDIFF = 54Ω,

CL1 = CL2 = 100pF

Figures 5, 7; CL = 100pF, S2 closed

Figures 5, 7; CL = 100pF, S1 closed

Figures 4, 6; RDIFF = 54Ω,

CL1 = CL2 = 100pF

Figures 4, 6; RDIFF = 54Ω,

CL1 = CL2 = 100pF

Figures 5, 7; CL = 15pF, S2 closed

Driver Disable Time from Low

tLZ

0.3

1.5

µs

Figures 5, 7; CL = 15pF, S1 closed

tSKD

100

225

Receiver Input to Output

Propagation Delay

tPLH

ns

Figures 4, 8; RDIFF = 54Ω,

CL1 = CL2 = 100pF

20

Figures 4, 8; RDIFF = 54Ω,

CL1 = CL2 = 100pF

Maximum Data Rate

fMAX

2.5

Mbps

tPLH, tPHL < 50% of data period

tPHL

100

275

100

225

-7V

≤ VCM ≤ 12V

0.25

RIN

k

Ω

Receiver Input Resistance

-7V

≤ VCM ≤ 12V

-0.2

0.2

VTH

V

Receiver Differential Threshold

MAX3480B

48

12

-0.2

-0.8

VIN = 12V

VIN = -7V

VIN = 12V

VIN = -7V

MAX3480B

MAX3480A

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