LTC2862A

9

Rev. A

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PIN FUNCTIONS

PIN NAME

PIN NUMBER

DESCRIPTION

RO

1

Receiver Output. If the receiver output is enabled (RE low) and A–B > 200mV, then RO will be high.

If A–B < –200mV, then RO will be low. If the receiver inputs are open, shorted, or terminated without a

signal, RO will be high. Integrated 250kΩ pull-up to VCC.

RE

2

Receiver Enable. A low input enables the receiver. A high input forces the receiver output into a high

impedance state. If RE is high with DE low, the part will enter a low power shutdown state.

DE

3

Driver Enable. A high input on DE enables the driver. A low input will force the driver outputs into a high

impedance state. If DE is low with RE high, the part will enter a low power shutdown state.

DI

4

Driver Input. If the driver outputs are enabled (DE high), then a low on DI forces the driver noninverting

output A low and inverting output B high. A high on DI, with the driver outputs enabled, forces the

driver noninverting output A high and inverting output B low.

GND

5

Ground.

Exposed Pad

9

Connect the exposed pad on the DFN packages to GND.

B

7

Inverting Receiver Input and Inverting Driver Output.

Impedance is ~112kΩ in receive mode or unpowered.

A

6

Noninverting Receiver Input and Noninverting Driver Output.

Impedance is ~112kΩ in receive mode or unpowered.

VCC

8

Power Supply. 3V < VCC < 5.5V. Bypass with 1µF ceramic capacitor to GND for best ESD performance.

LTC2862A

LOGIC INPUTS

MODE

A, B

RO

DE

RE

0

0

Receive

RIN

Active

0

1

Shutdown

RIN

High-Z*

1

0

Transceive

Active

Active

1

1

Transmit

Active

High-Z*

* 250kΩ pull-up to VCC.

FUNCTION TABLE