ISL32478E Ver la hoja de datos (PDF) - Renesas Electronics

Número de pieza

componentes Descripción

Fabricante

ISL32478E

Fault Protected, Extended Common-Mode Range, RS-485/RS-422 Transceivers with ±16.5kV ESD

Renesas Electronics 

ISL32470E, ISL32472E, ISL32475E, ISL32478E

Test Circuits and Waveforms (Continued)

RE

B

B

15pF

A

R RO

A

SIGNAL

GENERATOR

SIGNAL

GENERATOR

RO

VCM

0V

tPLH

50%

750mV

0V

-750mV

tPHL

50%

VCC

0V

FIGURE 9A. TEST CIRCUIT

FIGURE 9B. MEASUREMENT POINTS

FIGURE 9. RECEIVER PROPAGATION DELAY AND DATA RATE

SIGNAL

GENERATOR

RE

B

A

R RO

1kΩ

15pF

VCC

SW GND

RE

(Note

1.5V

3V

1.5V

0V

PARAMETER

tHZ

tLZ

tZH (Note 12)

tZL (Note 12)

tZH(SHDN) (Note 15)

tZL(SHDN) (Note 15)

DE

A

SW

0

+1.5V

GND

0

-1.5V

VCC

0

+1.5V

GND

0

-1.5V

VCC

0

+1.5V

GND

0

-1.5V

VCC

tZH, tZH(SHDN)

(Note 13)

RO

tZL, tZL(SHDN)

(Note

RO

tHZ

OUTPUT HIGH

1.5V

VOH - 0.5V

VOH

0V

tLZ

1.5V

OUTPUT LOW

VOL + 0.5V

VCC

VOL

FIGURE 10A. TEST CIRCUIT

FIGURE 10B. MEASUREMENT POINTS

FIGURE 10. RECEIVER ENABLE AND DISABLE TIMES

Typical Performance Curves VCC = 5V, TA = +25°C; unless otherwise specified.

90

3.6

RD = 20Ω

80

+25°C

RD = 30Ω

3.4

70

+85°C

60

RD = 54Ω

3.2

RD = 100Ω

50

3.0

40

RD = 100Ω

2.8

30

20

2.6

RD = 54Ω

10

2.4

00

1

2

3

4

5

DIFFERENTIAL OUTPUT VOLTAGE (V)

FIGURE 11. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT

VOLTAGE

2.2

-40 -25

0

25

50

75 85

TEMPERATURE (°C)

FIGURE 12. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs

TEMPERATURE

FN7784 Rev 2.00

Feb 14, 2019

Page 11 of 21

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