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MAX1480E

±15kV ESD-Protected, Isolated RS-485/RS-422 Data Interfaces

Maxim Integrated 

±15kV ESD-Protected, Isolated RS-485/RS-422

Data Interfaces

ELECTRICAL CHARACTERISTICS (continued)

(VCC_ = +5V ±10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = +5V and TA = +25°C.)

(Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Change in Magnitude of

Driver Output Voltage for

Complementary Output States

∆VOD

R = 27Ω or 50Ω, Figure 4

Differential

Common mode

0.3

V

0.3

Driver Common-Mode Output

VOC

Input Current (A, B)

ISO IIN

Receiver Input Resistance

RIN

Receiver Differential Threshold

Receiver Input Hysteresis

Receiver Output Low Voltage

Receiver Output High Current

Driver Short-Circuit Current

VTH

∆VTH

VOL

IOH

ISO IOSD

ESD Protection

ISO IOSD

R = 27Ω or 50Ω, Figure 4

MAX1490EA/

MAX1490EB

VIN = +12V MAX1480EA/

DE´ = 0,

MAX1480EC

VCC_ = 0 or +5.5V

MAX1490EA/

MAX1490EB

VIN = -7V MAX1480EA/

MAX1480EC

-7V ≤ VCM ≤ +12V

(MAX1480E_)

(MAX1490E_)

-7V ≤ VCM ≤ +12V

VCM = 0

Using resistor values listed in Tables 1 and 2

VOUT = 5.5V

-7V ≤ VO ≤ 12V (Note 5)

A, B, Y, and Z pins, tested using Human Body

Model, Figures 1 and 2

4

V

1.0

0.25

mA

0.8

0.2

48

kΩ

12

-0.2

0.2

V

70

mV

0.4

V

250 µA

100

mA

±15

kV

SWITCHING CHARACTERISTICS—MAX1480EA/MAX1490EA

(VCC_ = +5V ±10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = +5V and TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Driver Input to Output

Propagation Delay

Driver Output Skew

Driver Rise or Fall Time

tPLH

tPHL

tSKEW

tR, tF

Figures 5 and 7, RDIFF = 54Ω,

CL1 = CL2 = 100pF

Figures 5 and 7, RDIFF = 54Ω, CL1 = CL2 = 100pF

Figures 5 and 7, RDIFF = 54Ω, CL1 = CL2 = 100pF

90 275

ns

60 275

30 100 ns

15

50

ns

Driver Enable to Output High

(MAX1480EA Only)

tZH

Figures 6 and 8, CL = 100pF, S2 closed

1.0

1.8

µs

Driver Enable to Output Low

(MAX1480EA Only)

tZL

Figures 6 and 8, CL = 100pF, S1 closed

1.0

1.8

µs

Driver Disable Time from Low

(MAX1480EA Only)

tLZ

Figures 6 and 8, CL = 15pF, S1 closed

0.5

1.8

µs

Driver Disable Time from High

(MAX1480EA Only)

tHZ

Figures 6 and 8, CL = 15pF, S2 closed

Receiver Input to Output

Propagation Delay

tPLH

tPHL

Figures 5 and 10, RDIFF = 54Ω, CL1 = CL2 = 100pF

0.5

1.8

µs

120 225

ns

90 225

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