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LTC1347CSW

5V Low Power RS232 3-Driver/5-Receiver Transceiver with 5 Receivers Active in Shutdown

Linear Technology 

LTC1347

PI FU CTIO S

charge pump efficiency, the capacitor’s effective series

resistance should be less than 2Ω.

DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/

CMOS compatible. Inputs should not be allowed to float.

Tie unused inputs to VCC.

DRIVER OUT: Driver Outputs at RS232 Voltage Levels.

Outputs are in a high impedance state when in Shutdown

mode or VCC = 0V. 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 Lev-

els. All receivers are kept alive in Shutdown.

UW

W

SWITCHI G TI E WAVEFOR S

DRIVER

INPUT

1.4V

DRIVER

OUTPUT

0V

tLHD

1.4V

tHLD

VCC

0V

V+

0V

V–

1347 F01

Figure 1. Driver Propagation Delay Timing

RX

1.7V

INPUT

RX

OUTPUT

0.8V

tLHR

VCC

1.3V

0V

tHLR

2.4V VCC

0V

1347 F02

Figure 2. Receiver Propagation Delay Timing

1347fa

5

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