MAX3480ACPI Просмотр технического описания (PDF) - Maxim Integrated

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MAX3480ACPI

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

Maxim Integrated 

Complete, Isolated, 3.3V

RS-485/RS-422 Data Interface

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)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Input Current (A, B)

Receiver Input Resistance

ISO IIN

DE´ = 0V,

VCC = 0V or 3.6V

MAVXIN34=801A2V VIN = 12V

VIN = -7V

MAX3480B VIN = 12V

VIN = -7V

MAX3480A

12

RIN

-7V ≤ VCM ≤ 12V MAX3480B

1.0

-00..88

mA

0.25

-0.2

kΩ

48

Receiver Differential Threshold

Receiver Input Hysteresis

VTH

∆VTH

-7V ≤ VCM ≤ 12V

VCM = 0V

-0.2

0.2

V

70

mV

Receiver Output/Receiver Output

Low Voltage

VOL DI´ = VCC

0.4

V

Receiver Output/Receiver Output

High Current

Driver Short-Circuit Current

IOH VOUT = 3.6V, DI´ = 0V

ISO IOSD -7V ≤ VO ≤ 12V (Note 4)

250

µA

100

mA

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.)

PARAMETER

Driver Input to Output

Propagation Delay

Driver Output Skew (Note 5)

Driver Rise or Fall Time

Driver Enable to Output High

Driver Enable to Output Low

Driver Disable Time from High

Driver Disable Time from Low

Receiver Input to Output

Propagation Delay

tPLH - tPHL Differential

Receiver Skew

Maximum Data Rate

SYMBOL

CONDITIONS

tPLH

tPHL

Figures 4, 6; RDIFF = 54Ω,

CL1 = CL2 = 100pF

tSKEW

Figures 4, 6; RDIFF = 54Ω,

CL1 = CL2 = 100pF

tR, tF

tZH

tZL

tHZ

tLZ

tPLH

tPHL

Figures 4, 6; RDIFF = 54Ω,

CL1 = CL2 = 100pF

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

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

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

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

Figures 4, 8; RDIFF = 54Ω,

CL1 = CL2 = 100pF

tSKD

fMAX

Figures 4, 8; RDIFF = 54Ω,

CL1 = CL2 = 100pF

tPLH, tPHL < 50% of data period

MIN TYP MAX UNITS

100

275

ns

100

275

25

90

ns

15

40

ns

0.2

1.5

µs

0.2

1.5

µs

0.3

1.5

µs

0.3

1.5

µs

100

225

ns

100

225

20

ns

2.5

Mbps

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