Rainbow-electronics MAX14770E Manual de usuario descargar pdf (Pagina 3)

High-ESD Profibus RS-485 Transceiver

MAX14770E

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +5V Q10%, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

= +5V, T

= +25NC.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LOGIC INPUTS

Driver Input High

Voltage

DE, DI, RE

2.0 V

Driver Input Low

Voltage

DE, DI, RE

0.8 V

Driver Input

Hysteresis

HYS

DE, DI, RE

50 mV

Driver Input Current I

DE, DI, RE

-1 +1

Input Impedance in

Hot Swap

Figure 11 until the first low-to-high transition of DE

occurs

1 5.6 10

Figure 11 until the first high-to-low transition of RE

occurs

RECEIVER

Input Current (A, B) I

DE = GND, V

= GND or

+5.5V

= 12V +250

= -7V -200

Differential Input

Capacitance

Between A and B, DE = RE = GND at 6MHz

8 pF

Receiver Differential

Threshold Voltage

-7V P V

P 12V

-200 -125 -50 mV

Receiver Input

Hysteresis

= 0V 15 mV

LOGIC OUTPUT

Output High Voltage V

OUT

= -1mA, V

- V

= V

1.5

Output Low Voltage V

OUT

= 1mA, V

- V

= -V

0.4 V

Three-State Receiver

Output Current

OZR

0V P V

OUT

P V

-1 +1

Receiver Input

Resistance

-7V P V

P 12V

Receiver Output

Short-Circuit Current

OSR

0V P V

P V

-110 +110 mA

PROTECTION SPECIFICATIONS

Thermal-Shutdown

Threshold

+160

Thermal-Shutdown

Hysteresis

TSH

ESD Protection, A

and B Pins

HBM

±35

kVIEC 61000-4-2 Air-Gap Discharge to GND

±20

IEC 61000-4-2 Contact Discharge to GND

±10

ESD Protection, All

Other Pins

HBM

±2

1 2 3 4 5 6 7 8 ... 14 15

MAX14770E 1

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Rainbow-electronics MAX14770E Manual de usuario Pagina 3

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