5

LT1330

CC

HARA TERISTICS

A

TYPICALPERFOR

CE

with a 0.1

µF ceramic capacitor close to the package pin.

Insufficient supply bypassing can result in low output

drive levels and erratic charge pump operation.

capacitor. This pin may also be connected to 5V.

GND: Ground Pin.

ON/OFF: TTL/CMOS Compatible Operating Mode Control.

A logic low puts the device in the low power shutdown

mode. All three drivers and four receivers (RX1, RX2, RX3,

and RX4) assume a high impedance output state in shut-

down. Only receiver RX5 remains active while the trans-

ceiver is in shutdown. The transceiver consumes only

PI FU CTIO S

60

µA of supply current while in shutdown. A logic high

fully enables the transceiver.

DRIVER DISABLE: This pin provides an alternate control

for the charge pump and RS232 drivers. A logic high on

this pin shuts down the charge pump and places all driver

outputs in a high impedance state. All five receivers remain

active under these conditions. Floating the driver disable

pin or driving it to a logic low level fully enables the

transceiver. A logic low on the ON/OFF pin supersedes the

state of the DRIVER DISABLE pin. Supply current drops to

3mA when in driver disable mode.

requires an external charge storage capacitor, C

≥ 1.0µF,

tied to ground or 5V. Larger value capacitors may be used

Receiver Output Waveforms

RX5 OUTPUT

Receiver Short-Circuit Current

Driver Short-Circuit Current

TEMPERATURE (°C)

–55

0

15

40

0

50

75

1330 G11

10

35

25

–25

25

100

125

30

20

5

RX1 TO RX4

RX1 TO RX4

TEMPERATURE (

°C)

–55

20

25

30

25

75

1330 G10

15

10

–25

0

50

100

125

5

0

+

–

INPUT

1330 G13

INPUT

DRIVER OUTPUT

DRIVER OUTPUT

RX1 TO RX4

OUTPUT

1330 G12

Driver Output Waveforms