Rainbow-electronics MAX14770E Manual de usuario descargar pdf (Pagina 4)

High-ESD Profibus RS-485 Transceiver

MAX14770E

4 ______________________________________________________________________________________

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

DRIVER SWITCHING CHARACTERISTICS

Driver Propagation

Delay

DPLH

= 54I, C

= 50pF; Figures 3 and 4

28 ns

DPHL

Differential Driver

Output Skew |t

DPLH

- t

DPHL

DSKEW

= 54I, C

= 50pF; Figures 3 and 4

1.2 ns

Driver Output

Transition Skew

t(MLH)

|, |t

t(MHL)

TSKEW

= 54I, C

= 50pF; Figures 3 and 5

2 ns

Driver Differential

Output Rise or Fall

Time

, t

= 54I, C

= 50pF; Figures 3 and 4

15 ns

Maximum Data Rate

20 Mbps

Driver Enable to

Output High

DZH

= 500I, C

= 50pF; Figure 6

50 ns

Driver Enable to

Output Low

DZL

= 500I, C

= 50pF; Figure 7

50 ns

Driver Disable Time

from Low

DLZ

= 500I, C

= 50pF; Figure 7

40 ns

Driver Disable Time

from High

DHZ

= 500I, C

= 50pF, Figure 6

40 ns

Driver Enable Skew

Time

- t

= 500I, C

= 50pF; Figures 6 and 7

8 ns

Driver Disable Skew

Time

- t

= 500I, C

= 50pF; Figures 6 and 7

8 ns

Driver Enable from

Shutdown to Output

High

DZL(SHDN)

= 500I, C

= 50pF; Figure 7 (Note 6)

100

Driver Enable from

Shutdown to Output

Low

DZH(SHDN)

= 500I, C

= 50pF; Figure 6 (Note 6)

100

Time to Shutdown t

SHDN

(Note 6) 50 800 ns

RECEIVER SWITCHING CHARACTERISTICS

Receiver Propagation

Delay

RPLH

= 15pF; Figures 8 and 9 (Note 7) 28 ns

RPHL

Receiver Output

Skew

RSKEW

= 15pF; Figures 8 and 9 (Notes 7, 8) 2 ns

1 2 3 4 5 6 7 8 9 ... 14 15

MAX14770E 1

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Rainbow-electronics MAX14770E Manual de usuario Pagina 4

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