LTC1383CS datasheet(4/8 Pages) LINER

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LTC1383

1383fa

TYPICAL PERFOR A CE CHARACTERISTICS

VCC Supply Current

vs Temperature

TEMPERATURE (°C)

LTC1383 • TPC04

2 DRIVERS LOADED

RL = 3k

1 DRIVER LOADED

RL = 3k

Driver Output Waveforms

Receiver Output Waveforms

INPUT

LTC1383 • TPC05

RECEIVER

OUTPUT

CL = 51pF

INPUT

LTC1383 • TPC06

VCC: 5V Input Supply Pin. This pin should be decoupled

with a 0.1µF ceramic capacitor.

GND: Ground Pin.

V+: Positive Supply Output (RS232 Drivers). V+ ≅ 2VCC –

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

charge storage. The capacitor may be tied to ground or

VCC. With multiple devices, the V + and V – pins may share

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

creasing the size of the shared common storage capaci-

tors is recommended to reduce ripple.

V–: Negative Supply Output (RS232 Drivers). V – ≅ – (2VCC

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

charge storage.

C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. These

pins require two external capacitors C = 0.1µF: one from

C1+ to C1– and another from C2+ to C2 –. To maintain

charge pump efficiency, the capacitor’s effective series

resistance should be less than 2Ω.

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

compatible. The inputs of unused drivers can be left

unconnected since 300k input pull-up resistors to VCC are

included on chip.

TR OUT: Driver Outputs at RS232 Voltage Levels. The

driver outputs are protected against ESD to ±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

Levels.

DRIVER

OUTPUT

RL = 3k

CL = 2500pF

DRIVER

OUTPUT

RL = 3k

5µs/DIV

PI FU CTIO S

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