MAX483CUA 데이터 시트보기 (PDF) - Maxim Integrated

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MAX483CUA

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers

Maxim Integrated 

MAX481/MAX483/MAX485/

MAX487–MAX491/MAX1487

Low-Power, Slew-Rate-Limited

RS-485/RS-422 Transceivers

_______________________________________________________Switching Waveforms

3V

DI

1.5V

0V

tPLH

1.5V

tPHL

1/2 VO

Z

VO

Y

1/2 VO

VDIFF = V (Y) - V (Z)

VDIFF

VO

0V

-VO

10%

90%

90%

10%

tR

tF

tSKEW = | tPLH - tPHL |

Figure 8. Driver Propagation Delays

3V

DE

1.5V

0V

Y, Z

VOL

Y, Z

0V

1.5V

tZL(SHDN), tZL

tLZ

2.3V OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

2.3V

tZH(SHDN), tZH

tHZ

VOL + 0.5V

VOH - 0.5V

Figure 9. Driver Enable and Disable Times (except MAX488 and

MAX490)

VOH

RO

VOL

A-B VID

-VID

0V

1.5V

OUTPUT

1.5V

tPHL

tPLH

INPUT

0V

3V

RE

1.5V

0V

VCC

RO

RO

0V

1.5V

tZL(SHDN), tZL

tLZ

1.5V OUTPUT NORMALLY LOW

OUTPUT NORMALLY HIGH

1.5V

tZH(SHDN), tZH

tHZ

VOL + 0.5V

VOH - 0.5V

Figure 10. Receiver Propagation Delays

Figure 11. Receiver Enable and Disable Times (except MAX488

and MAX490)

_________________Function Tables (MAX481/MAX483/MAX485/MAX487/MAX1487)

Table 1. Transmitting

Table 2. Receiving

INPUTS

RE

DE

DI

X

1

1

OUTPUTS

Z

Y

0

1

INPUTS

OUTPUT

RE

DE

A-B

RO

0

0

> +0.2V

1

X

1

0

1

0

0

0

X

High-Z

High-Z

1

0

X

High-Z* High-Z*

X = Don’t care

High-Z = High impedance

*Shutdown mode for MAX481/MAX483/MAX487

0

0

< -0.2V

0

0

0

Inputs open

1

1

0

X

High-Z*

X = Don’t care

High-Z = High impedance

*Shutdown mode for MAX481/MAX483/MAX487

10

Maxim Integrated

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