Rainbow-electronics MAX14770E Manual de usuario descargar pdf (Pagina 11)

High-ESD Profibus RS-485 Transceiver

MAX14770E

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Pin Configurations

Pin Description

PIN NAME FUNCTION

1 RO

Receiver Output. When RE is low and (A - B) R -50mV, RO is high; if (A - B) P -200mV, RO is low.

Receiver Enable. Drive RE low to enable RO; RO is high impedance when RE is high. Drive RE

high and DE low to enter low-power shutdown mode.

3 DE

Driver Enable. Drive DE high to enable driver output. The driver outputs are high impedance when

DE is low. Drive RE high and DE low to enter low-power shutdown mode.

4 DI

Driver Input. With DE high, a low on DI forces the noninverting output, A, low and the inverting out-

put, B, high. Similarly, a high on DI forces the noninverting output, A, high and the inverting output,

B, low.

5 GND Ground

6 A Noninverting Receiver Input and Noninverting Driver Output

7 B Inverting Receiver Input and Inverting Driver Output

8 V

Positive Supply. Bypass V

to GND with a 0.1FF ceramic capacitor as close as possible to the

device.

— EP Exposed Pad (TDFN Only). Connect EP to GND.

MAX14770E

TOP VIEW

GND

MAX14770E

7 B

GND

TDFN

(3mm × 3mm)

*CONNECT EXPOSED PAD TO GND.

*EP

1 2 ... 6 7 8 9 10 11 12 13 14 15

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Rainbow-electronics MAX14770E Manual de usuario Pagina 11