Rainbow-electronics MAX3430 Instrukcja Użytkownika Pobierz pdf (Strona 2)

MAX3430

±80V Fault-Protected, Fail-Safe,

1/4-Unit Load, +3.3V RS-485 Transceiver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

= +3.3V ±10%, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

= +3.3V and T

= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

(All voltages are referenced to GND.)

........................................................................................+5V

RE, DE, DI...................................................-0.3V to (V

+ 0.3V)

Driver Output Voltage (A, B) (Note 1) ..................................±80V

Receiver Input Voltage (A, B) (Note 1) ................................±80V

RO ..............................................................-0.3V to (V

+ 0.3V)

Continuous Power Dissipation (T

= +70°C)

8-Pin SO (derate 5.88mW/°C above +70°C)................471mW

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW

Operating Temperature Ranges

MAX3430C_ _ .....................................................0°C to +70°C

MAX3430E_ _ ..................................................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: A, B must be terminated with 54Ω or 100Ω to guarantee ±80V fault protection.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DRIVER

Figure 1, R

= 100Ω 2.0 V

Differential Driver Output V

Figure 1, R

= 54Ω 1.5 V

Change in Magnitude of

Differential Output Voltage

∆V

Figure 1, R

= 100Ω or 54Ω (Note 2) 0.2 V

Driver Common-Mode Output

Voltage

Figure 1, R

= 100Ω or 54Ω V

/ 2 3 V

Change in Magnitude of

Common-Mode Voltage

∆V

Figure 1, R

= 100Ω or 54Ω (Note 2) 0.2 V

DRIVER LOGIC

Driver Input High Voltage V

DI 2.0 V

Driver Input Low Voltage V

DI 0.8 V

Driver Input Current I

DI ±1µA

0 ≤ V

OUT

≤ 12V (Note 3) +250

Driver Short-Circuit Output

Current

OSD

-7V ≤ V

OUT

≤ V

(Note 3) -250

- 1V) ≤ V

OUT

≤ 12V (Note 3) +10

Driver Short-Circuit Foldback

Output Current

OSDF

-7V ≤ V

OUT

≤ 1V (Note 3) -10

RECEIVER

DE = GND, RE = GND, V

= +12V 250

DE = GND, RE = GND, V

= -7V -200

µA

Input Current (A, B) I

A, B

= -80V to +80V -6 +6 mA

Receiver Differential Threshold

Voltage

-7V ≤ V

≤ 12V -200 -50 mV

Receiver Input Hysteresis ∆V

+ V

= 0 25 mV

1 2 3 4 5 6 7 ... 12 13

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