MAX1483 datasheet(3/14 Pages) MAXIM

3 / 14 page

20µA, 1⁄8-Unit-Load, Slew-Rate-Limited

RS-485 Transceivers

_______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

SWITCHING CHARACTERISTICS

(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

MAX1482,

RE = 0V or VCC

≤ VO ≤ VCC

MAX1483,

RE = 0V or VCC

DE = 0V, RE = VCC

DI = high or low, -7V

≤ VO ≤ 12V (Note 2)

CONDITIONS

±7

±95

IOSR

Receiver Short-Circuit Current

µA

ICC

No-Load Supply Current

µA

0.1

ISHDN

Supply Current in Shutdown

250

IOSD

Driver Short-Circuit Current

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

DE = VCC

DE = 0V

DE = VCC

DE = 0V

Figures 4 and 6, CL = 15pF, S2 closed

Figures 4 and 6, CL = 15pF, S1 closed

Figures 4 and 6, CL = 100pF, S1 closed

Figures 4 and 6, CL = 100pF, S2 closed

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

Driver Enable to Output High

tZH

0.2

Driver Output Skew to Output

tR, tF

0.25

µs

Driver Enable to Output Low

tZL

0.1

µs

Driver Disable Time from Low

tLZ

0.3

3.0

µs

Driver Disable Time from High

tHZ

0.3

3.0

µs

Driver Input to Output

tPLH

tSKEW

800

µs

CONDITIONS

Figures 3 and 5, RDIFF = 54

Ω,

CL1 = CL2 = 100pF

Figures 3 and 5, RDIFF = 54

Ω, CL1 = CL2 = 100pF

µs

Figures 3 and 5, RDIFF = 54

Ω, CL1 = CL2 = 100pF

Driver Rise or Fall Time

tPHL

Receiver Input to Output

tPLH, tPHL Figures 3 and 7, RDIFF = 54

Ω, CL1 = CL2 = 100pF

0.25

2.25

µs

| tPLH - tPHL | Differential

Receiver Skew

tSKD

Figures 3 and 7, RDIFF = 54

Ω, CL1 = CL2 = 100pF

160

Receiver Enable to Output Low

tZL

Figures 2 and 8, CRL = 15pF, S1 closed

Receiver Enable to Output High

tZH

Figures 2 and 8, CRL = 15pF, S2 closed

Receiver Disable Time from Low

tLZ

Figures 2 and 8, CRL = 15pF, S1 closed

Receiver Disable Time from High

tHZ

Figures 2 and 8, CRL = 15pF, S2 closed

Maximum Data Rate

fMAX

250

kbps

Time to Shutdown

tSHDN

(Note 3)

200

600

Driver Enable from Shutdown to

Output High

tZH(SHDN) Figures 4 and 6, CL = 100pF, S2 closed

µs

Driver Enable from Shutdown to

Output Low

tZL(SHDN)

Figures 4 and 6, CL = 100pF, S1 closed

µs

Receiver Enable from Shutdown

to Output High

tZH(SHDN)

Figures 2 and 8, CL = 15pF, S2 closed,

A - B = 2V

Receiver Enable from Shutdown

to Output Low

tZL(SHDN)

Figures 2 and 8, CL = 15pF, S1 closed,

B - A = 2V

µs

Note 2: Applies to peak current. See Typical Operating Characteristics.

Note 3: The MAX1482/MAX1483 are put into shutdown by bringing

–

—

–

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.

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