ISL83080EIBZ 查看數據表（PDF） - Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

ISL83080EIBZ

±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers

Renesas Electronics 

ISL83080E/82E/83E/84E/85E/86E/88E

Test Circuits and Waveforms (Continued)

DE

VCC

DI

SIGNAL

GENERATOR

Z

D

Y

60

CD

+

VOD

-

DI

DIFF OUT (Y - Z)

-VOD

3V

0V

+VOD 0V

FIGURE 4A. TEST CIRCUIT

FIGURE 4B. MEASUREMENT POINTS

FIGURE 4. DRIVER DATA RATE

RE

0V B

A

R RO

15pF

SIGNAL

GENERATOR

A

0V

+1.5V

0V

-1.5V

tPLH

tPHL

VCC

RO

1.5V

1.5V

0V

FIGURE 5A. TEST CIRCUIT

FIGURE 5B. MEASUREMENT POINTS

FIGURE 5. RECEIVER PROPAGATION DELAY AND DATA RATE

SIGNAL

GENERATOR

RE

GND

B

A R RO

1k

15pF

VCC

SW GND

PARAMETER

DE

tHZ

0

tLZ

0

tZH (Note 9)

0

tZL (Note 9)

0

tZH(SHDN) (Note 12)

0

tZL(SHDN) (Note 12)

0

A

+1.5V

-1.5V

+1.5V

-1.5V

+1.5V

-1.5V

SW

GND

VCC

GND

VCC

GND

VCC

NOTE 10

RE

tZH, tZH(SHDN)

NOTES 9, 12

RO

tZL, tZL(SHDN)

NOTES 9, 12

RO

1.5V

3V

1.5V

0V

tHZ

OUTPUT HIGH

1.5V

VOH - 0.5V VOH

0V

tLZ

1.5V

OUTPUT LOW

VCC

VOL + 0.5V VOL

FIGURE 6A. TEST CIRCUIT

FIGURE 6B. MEASUREMENT POINTS

FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES (DOES NOT APPLY TO THE ISL83084E)

Application Information

RS-485 and RS-422 are differential (balanced) data

transmission standards for use in long haul or noisy

environments. RS-422 is a subset of RS-485, so RS-485

transceivers are also RS-422 compliant. RS-422 is a

point-to-multipoint (multidrop) standard, which allows only

FN6085 Rev 10.00

February 15, 2016

one driver and up to 10 (assuming one unit load devices)

receivers on each bus. RS-485 is a true multipoint standard,

which allows up to 32 one unit load devices (any

combination of drivers and receivers) on each bus. To allow

for multipoint operation, the RS-485 specification requires

that drivers must handle bus contention without sustaining

any damage.

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