ADM2486

Rev. C | Page 9 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

ADM2486

TOP VIEW

(Not to Scale)

RxD

3

RE

4

NC

B

16

15

14

13

5

6

4

12

11

5

7

8

10

9

RTS

TxD

PV

A

NC

DE

NC = NO CONNECT

EITHER OR BOTH MAY BE USED FOR GND1.

PIN 9 AND PIN 15 ARE INTERNALLY CONNECTED.

EITHER OR BOTH MAY BE USED FOR GND2.

Figure 2. Pin Configuration

Table 8.

Pin No.

Mnemonic

Function

1

Power Supply (Logic Side).

2, 8

Ground (Logic Side).

3

R×D

Receiver Output Data. This output is high when (A – B) > 200 mV, and low when (A – B) < –200 mV.

The output is three-stated when the receiver is disabled, that is, when RE is driven high.

4

RE

Receiver Enable Input. This is an active-low input. Driving this input low enables the receiver, and driving

it high disables the receiver.

5

RTS

Request to Send Input. Driving this input high enables the driver, and driving it low disables the driver.

6

TxD

Transmit Data Input. Data to be transmitted by the driver is applied to this input.

7

PV

Power_Valid. Used during power-up and power-down. See the Applications Information section.

9, 15

Ground (Bus Side).

10

DE

Driver Enable Status Output. This output signals the driver enable or disable status to other devices on

the bus. DE is high when the driver is enabled and low when the driver is disabled.

11, 14

NC

No Connect.

12

A

down, Pin A is put into a high impedance state to avoid overloading the bus.

13

B

down, Pin B is put into a high impedance state to avoid overloading the bus.

16

Power Supply (Bus Side).