LTC1347CS datasheet(4/8 Pages) LINER

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LTC1347

TYPICAL PERFORMANCE CHARACTERISTICS

TEMPERATURE (°C)

1347 G04

3 DRIVERS LOADED

RL = 3k

1 DRIVER LOADED

RL = 3k

VCC Supply Current

TEMPERATURE (°C)

–40

1347 G06

080

–20

100

ISC

–

Driver Short-Circuit Current

TEMPERATURE (°C)

1347 G05

VOUT = –20V

VOUT = 20V

Driver Leakage in Shutdown

Receiver Short-Circuit Current

TEMPERATURE (°C)

–40

1347 G07

–20

100

ISC

–

ISC

Driver Output Waveforms

Receiver Output Waveforms

DRIVER

OUTPUT

RL = 3k

CL = 2500pF

1347 G08

1347 G09

RECEIVER

OUTPUT

CL = 51pF

INPUT

DRIVER

OUTPUT

RL = 3k

INPUT

PI FU CTIO S

VCC: 5V Input Supply Pin. Supply current is typically 80µA

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 with all receiv-

ers kept alive, and the supply current is 80

µA. All driver

outputs are in high impedance state. This pin cannot float.

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

may be paralleled 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.

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