ISL3332 查看數據表（PDF） - Intersil

零件编号

产品描述 (功能)

生产厂家

ISL3332

3.3V, ±15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) Transceivers

Intersil 

Test Circuits and Waveforms

ISL3332, ISL3333

VCC DE

DY

Y

D

Z

R

RD VOD

R

VOC

FIGURE 1. RS-485 DRIVER VOD AND VOC TEST CIRCUIT

DE

VCC

DY

SIGNAL

GENERATOR

Y

D

Z

CL = 100pF

RDIFF

CL = 100pF

DY

1.5V

OUT (Z)

tPLH

50%

tPHL

OUT (Y)

50%

tDLH

DIFF OUT (Z - Y)

90%

0V

10%

tR

3V

1.5V

0V

tPHL

50%

VOH

VOL

tPLH

50%

tDHL

90%

0V

10%

tF

VOH

VOL

+VOD

-VOD

FIGURE 2A. TEST CIRCUIT

SKEW = |tPLH (Y or Z) - tPHL (Z or Y)|

FIGURE 2B. MEASUREMENT POINTS

FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES

11

FN6362.0

May 27, 2008

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