LTC1337CS datasheet(4/8 Pages) LINER

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LTC1337

HARA TERISTICS

TYPICALPERFOR

VCC Supply Current

TEMPERATURE (°C)

1337 G05

VOUT = –20V

VOUT = 20V

TEMPERATURE (°C)

1337 G04

3 DRIVERS LOADED

RL = 3k

1 DRIVER LOADED

RL = 3k

Driver Short-Circuit Current

Driver Leakage in SHUTDOWN

Receiver Short-Circuit Current

Driver Output Waveforms

INPUT

DRIVER

OUTPUT

RL = 3k

DRIVER

OUTPUT

RL = 3k

CL = 2500pF

Receiver Output Waveforms

OUTPUT

CL = 50pF

INPUT

PI FU CTIO S

VCC: 5V Input Supply Pin. Supply current less than 1µA in

the SHUTDOWN mode. This pin should be decoupled 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 which

reduces input supply current to less than 1

µA and places

all drivers and receivers in high impedance state.

V+: Positive Supply Output (RS232 Drivers). V+

≅ 2VCC –

1V. This pin requires an external capacitor C = 0.1

µF for

charge storage. The capacitor may be tied to ground or 5V.

With multiple devices, the V + and V – pins may be paral-

leled into common capacitors. For large numbers of

devices, increasing the size of the shared common storage

capacitors is recommended to reduce ripple.

V–: Negative Supply Output (RS232 Drivers). V–

≅ (2VCC

–1.5V). This pin requires an external capacitor C = 0.1

µF

for charge storage.

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

pins require two external capacitors C = 0.1

µF. 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 50

Ω.

TEMPERATURE (°C)

1337 G06

ISC

–

TEMPERATURE (°C)

1337 G07

ISC

–

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