5

LTC1382

PI FU CTIO S

with a 0.1

µF ceramic capacitor.

GND: Ground Pin.

ON/OFF: TTL/CMOS Compatible Shutdown Pin. A logic

low puts the device in the Shutdown mode. Both driver

outputs are forced into three-state and the supply current

is 0.2

µA.

2V. This pin requires an external capacitor C = 0.1

µF for

charge storage. The capacitor may be tied to ground or

a common capacitor. For large numbers of devices, in-

creasing the size of the shared common storage capaci-

tors is recommended to reduce ripple.

– 2V). This pin requires an external capacitor C = 0.1

µF for

charge storage.

pins require two external capacitors C = 0.1

µF: one from

charge pump efficiency, the capacitor’s effective series

resistance should be less than 2

Ω.

TR IN: RS232 Driver Input Pins. Inputs are TTL/CMOS

compatible. The inputs of unused drivers can be left

included on chip. To minimize power consumption, the

in the Shutdown mode.

TR OUT: Driver Outputs at RS232 Voltage Levels. Outputs

are in a high impedance state when in the Shutdown or

±10kV for human body model discharges.

RX IN: Receiver Inputs. These pins can be forced to

±25V

without damage. The receiver inputs are protected against

ESD to

±10kV for human body model discharges. Each

receiver provides 0.4V of hysteresis for noise immunity.

RX OUT: Receiver Outputs with TTL/CMOS Voltage Lev-

els. Outputs are in a high impedance state when in the

Shutdown mode.

Figure 1. Driver Propagation Delay Timing

Figure 2. Receiver Propagation Delay Timing

SWITCHI G TI E WAVEFOR S

1.4V

0V

0V

0V

DRIVER

INPUT

DRIVER

OUTPUT

1.4V

LTC1382 • F01

0.8V

0V

2.4V

RX

INPUT

RX

OUTPUT

1.3V

1.7V

LTC1382 • F02

0V