Rainbow-electronics MAX3469 Manual do Utilizador descarregar pdf (Página 4)

Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to device

ground, unless otherwise noted.

Note 2: ∆V

and ∆V

are the changes in V

and V

, respectively, when the DI input changes state.

Note 3: The short-circuit output current applies to peak current just prior to foldback-current limiting; the short-circuit foldback output

current applies during current limiting to allow a recovery from bus contention.

Note 4: Capacitive load includes test probe and fixture capacitance.

Note 5: Shutdown is enabled by bringing RE high and DE low or by bringing SHDN high. If the enable inputs are in this state for less

than 50ns, the device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 800ns, the device

is guaranteed to have entered shutdown.

MAX3465–MAX3469

+5V, Fail-Safe, 40Mbps, Profibus RS-485/

RS-422 Transceivers

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= +5V ±5%, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V

= +5V and T

= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Recei ver O utp ut S kew

PLH

PHL

Figure 10, C

= 15pF, RXP = GND or

floating (Note 4)

2ns

Receiver Enable to Output Low t

Figures 8 and 11, R

= 1kΩ, C

= 15pF,

S1 closed (Note 4)

30 ns

Receiver Enable to Output High t

Figures 8 and 11, R

= 1kΩ, C

= 15pF,

S2 closed (Note 4)

30 ns

Receiver Disable Time from Low t

Figures 8 and 11, R

= 1kΩ, C

= 15pF,

S1 closed (Note 4)

30 ns

Receiver Disable Time from High t

Figures 8 and 11, R

= 1kΩ, C

= 15pF,

S2 closed (Note 4)

30 ns

Time to Shutdown t

SHDN

(Note 5) 50

800

Driver Enable from Shutdown to

Output High

(

SHDN

)

Figures 8 and 9, R

= 500Ω, C

= 50pF,

S2 closed (Note 5)

4µs

Driver Enable from Shutdown to

Output Low

(

SHDN

)

Figures 8 and 9, R

= 500Ω, C

= 50pF,

S1 closed (Note 5)

4µs

Receiver Enable from Shutdown to

Output High

(

SHDN

)

Figures 8 and 11, R

= 1kΩ, C

= 15pF,

S2 closed (Notes 4, 5)

4µs

Receiver Enable from Shutdown to

Output Low

(

SHDN

)

Figures 8 and 11, R

= 1kΩ, C

= 15pF,

S1 closed (Notes 4, 5)

4µs

NO-LOAD SUPPLY CURRENT

vs. TEMPERATURE

MAX3465 toc01

TEMPERATURE (°C)

NO-LOAD SUPPLY CURRENT (mA)

6040-20 0 20

2.15

2.20

2.25

2.30

2.35

2.40

2.45

2.50

2.10

-40 80

DE = V

DE = GND

OUTPUT CURRENT

vs. RECEIVER OUTPUT LOW VOLTAGE

MAX3465 toc02

OUTPUT LOW VOLTAGE (V)

OUTPUT CURRENT (mA)

4.54.03.53.02.52.01.51.00.5

0 5.0

OUTPUT CURRENT

vs. RECEIVER OUTPUT HIGH VOLTAGE

MAX3465 toc03

OUTPUT HIGH VOLTAGE (V)

OUTPUT CURRENT (mA)

4321

Typical Operating Characteristics

= +5V, T

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 ... 13 14

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