5

LTC1324

Receiver

vs Temperature

TEMPERATURE (

°C)

–55

65

8

7

6

5

4

3

2

1

0

1324 G13

–35

125

–15

525

45

85 105

TEMPERATURE (

°C)

–55

65

3.1

3.0

2.9

2.8

2.7

2.6

2.5

2.4

2.3

1324 G12

–35

125

–15

525

45

85 105

Driver Differential Output Voltage

vs Temperature

GND (Pin 8): Ground.

this pin is

this pin is

RXEN (Pin 14): Receiver Enable (TTL Compatible). A low

level on this pin and a high level on RXEN (Pin 6) disables

the receiver and three-states the logic outputs. A high level

allows normal operation. Connected to an internal pull-

down.

TXDEN (Pin 15): Driver Output Enable (TTL Compatible).

A low level on this pin and a high level on TXDEN (Pin 4)

forces the RS485 driver into three-state. A high level

enables the driver. Connected to an internal pull-down.

5.25V. Requires a 1

µF bypass capacitor to ground.

NC (Pins 1, 13): No Internal Connection.

SR (Pin 2): Slew Rate Control (TTL Compatible). A high

level on this pin forces the RS485 driver into the low slew

rate mode. A low level forces the driver into the high slew

rate or normal mode. Connected to an internal pull-down.

TXD (Pin 3): RS485 Driver Input (TTL Compatible).

TXDEN (Pin 4): Driver Output Enable (TTL Compatible). A

high level on this pin and a low level on TXDEN (Pin 15)

forces the RS485 driver into three-state. A low level

enables the driver.

SHDN (Pin 5): Shutdown Input (TTL Compatible). When

this pin is high, the chip is shut down; the driver and

receiver outputs three-state; and the supply current drops

to 1

µA. A low level on this pin allows normal operation.

RXEN (Pin 6): Receiver Enable (TTL Compatible). A high

level on this pin and a low level on RXEN (Pin 14) disables

the receiver and three-states the logic outputs. A low level

allows normal operation.

RXDO (Pin 7): RS485 Receiver Output.